Java transient关键字

Java 前端之家
前端之家收集整理的这篇文章主要介绍了Java transient关键字，前端之家小编觉得挺不错的，现在分享给大家，也给大家做个参考。

转自：nofollow">http://www.importnew.com/21517.html

<h1 style="border:0px; margin:-10px 0px 20px; padding:0px; font-size:28px; font-weight:normal; line-height:42px; font-family:'Microsoft YaHei','Myriad Pro',Lato,'Helvetica Neue',Helvetica,Arial,sans-serif">

  1. transient的作用及使用方法

<p style="border:0px; margin-top:0px; margin-bottom:20px; padding-top:0px; padding-bottom:0px; font-size:14px; font-family:'Microsoft YaHei',宋体,sans-serif">
我们都知道一个对象只要实现了Serilizable接口，这个对象就可以被序列化，java的这种序列化模式为开发者提供了很多便利，我们可以不必关系具体序列化的过程，只要这个类实现了Serilizable接口，这个类的所有属性和方法都会自动序列化。


<p style="border:0px; margin-top:0px; margin-bottom:20px; padding-top:0px; padding-bottom:0px; font-size:14px; font-family:'Microsoft YaHei',sans-serif">
然而在实际开发过程中，我们常常会遇到这样的问题，这个类的有些属性需要序列化，而其他属性不需要被序列化，打个比方，如果一个用户有一些敏感信息（如密码，银行卡号等），为了安全起见，不希望在网络操作（主要涉及到序列化操作，本地序列化缓存也适用）中被传输，这些信息对应的变量就可以加上transient关键字。换句话说，这个字段的生命周期仅存于调用者的内存中而不会写到磁盘里持久化。


<p style="border:0px; margin-top:0px; margin-bottom:20px; padding-top:0px; padding-bottom:0px; font-size:14px; font-family:'Microsoft YaHei',sans-serif">
总之，java 的transient关键字为我们提供了便利，你只需要实现Serilizable接口，将不需要序列化的属性前添加关键字transient，序列化对象的时候，这个属性就不会序列化到指定的目的地中。


<p style="border:0px; margin-top:0px; margin-bottom:20px; padding-top:0px; padding-bottom:0px; font-size:14px; font-family:'Microsoft YaHei',sans-serif">
示例code如下：


<div style="border:0px; margin:0px; padding:0px; font-size:14px; font-family:'Microsoft YaHei',sans-serif">
<div style="border:0px; margin:0px; padding:0px">
<div id="Highlighter_856156" class="SyntaxHighlighter notranslate java " style="border:0px; margin:1em 0px!important; padding:1px!important; font-size:12px!important; width:100%!important; position:relative!important; overflow-y:hidden!important; overflow-x:auto!important; font-family:Consolas,'Bitstream Vera Sans Mono','Courier New',Courier,monospace!important">
<table border="0" cellpadding="0" cellspacing="0" style="border-collapse:collapse; border-spacing:0px; border:0px!important; margin:0px!important; padding:0px!important; font-size:12px!important; width:100%!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; vertical-align:baseline!important; min-height:inherit!important"><tbody style="border:0px!important; margin:0px!important; padding:0px!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important"><tr style="border:0px!important; margin:0px!important; padding:0px!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important">
<td class="gutter" style="border:0px!important; margin:0px!important; padding:0px!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:auto!important; font-family:Consolas,monospace!important; min-height:inherit!important; color:rgb(175,175,175)!important">
<div class="line number1 index0 alt2" style="border-width:0px 3px 0px 0px!important; border-right-style:solid!important; border-right-color:rgb(108,226,108)!important; margin:0px!important; padding:0px 0.5em 0px 1em!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important; white-space:pre!important">
1

<div class="line number2 index1 alt1" style="border-width:0px 3px 0px 0px!important; border-right-style:solid!important; border-right-color:rgb(108,108)!important; margin:0px!important; padding:0px 0.5em 0px 1em!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important; white-space:pre!important">
2

<div class="line number3 index2 alt2" style="border-width:0px 3px 0px 0px!important; border-right-style:solid!important; border-right-color:rgb(108,108)!important; margin:0px!important; padding:0px 0.5em 0px 1em!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important; white-space:pre!important">
3

<div class="line number4 index3 alt1" style="border-width:0px 3px 0px 0px!important; border-right-style:solid!important; border-right-color:rgb(108,108)!important; margin:0px!important; padding:0px 0.5em 0px 1em!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important; white-space:pre!important">
4

<div class="line number5 index4 alt2" style="border-width:0px 3px 0px 0px!important; border-right-style:solid!important; border-right-color:rgb(108,108)!important; margin:0px!important; padding:0px 0.5em 0px 1em!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important; white-space:pre!important">
5

<div class="line number6 index5 alt1" style="border-width:0px 3px 0px 0px!important; border-right-style:solid!important; border-right-color:rgb(108,108)!important; margin:0px!important; padding:0px 0.5em 0px 1em!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important; white-space:pre!important">
6

<div class="line number7 index6 alt2" style="border-width:0px 3px 0px 0px!important; border-right-style:solid!important; border-right-color:rgb(108,108)!important; margin:0px!important; padding:0px 0.5em 0px 1em!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important; white-space:pre!important">
7

<div class="line number8 index7 alt1" style="border-width:0px 3px 0px 0px!important; border-right-style:solid!important; border-right-color:rgb(108,108)!important; margin:0px!important; padding:0px 0.5em 0px 1em!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important; white-space:pre!important">
8
<div class="line number9 index8 alt2" style="border-width:0px 3px 0px 0px!important; border-right-style:solid!important; border-right-color:rgb(108,108)!important; margin:0px!important; padding:0px 0.5em 0px 1em!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important; white-space:pre!important">
9
<div class="line number10 index9 alt1" style="border-width:0px 3px 0px 0px!important; border-right-style:solid!important; border-right-color:rgb(108,108)!important; margin:0px!important; padding:0px 0.5em 0px 1em!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important; white-space:pre!important">
10
<div class="line number11 index10 alt2" style="border-width:0px 3px 0px 0px!important; border-right-style:solid!important; border-right-color:rgb(108,108)!important; margin:0px!important; padding:0px 0.5em 0px 1em!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important; white-space:pre!important">
11
<div class="line number12 index11 alt1" style="border-width:0px 3px 0px 0px!important; border-right-style:solid!important; border-right-color:rgb(108,108)!important; margin:0px!important; padding:0px 0.5em 0px 1em!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important; white-space:pre!important">
12
<div class="line number13 index12 alt2" style="border-width:0px 3px 0px 0px!important; border-right-style:solid!important; border-right-color:rgb(108,108)!important; margin:0px!important; padding:0px 0.5em 0px 1em!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important; white-space:pre!important">
13
<div class="line number14 index13 alt1" style="border-width:0px 3px 0px 0px!important; border-right-style:solid!important; border-right-color:rgb(108,108)!important; margin:0px!important; padding:0px 0.5em 0px 1em!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important; white-space:pre!important">
14
<div class="line number15 index14 alt2" style="border-width:0px 3px 0px 0px!important; border-right-style:solid!important; border-right-color:rgb(108,108)!important; margin:0px!important; padding:0px 0.5em 0px 1em!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important; white-space:pre!important">
15
<div class="line number16 index15 alt1" style="border-width:0px 3px 0px 0px!important; border-right-style:solid!important; border-right-color:rgb(108,108)!important; margin:0px!important; padding:0px 0.5em 0px 1em!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important; white-space:pre!important">
16
<div class="line number17 index16 alt2" style="border-width:0px 3px 0px 0px!important; border-right-style:solid!important; border-right-color:rgb(108,108)!important; margin:0px!important; padding:0px 0.5em 0px 1em!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important; white-space:pre!important">
17
<div class="line number18 index17 alt1" style="border-width:0px 3px 0px 0px!important; border-right-style:solid!important; border-right-color:rgb(108,108)!important; margin:0px!important; padding:0px 0.5em 0px 1em!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important; white-space:pre!important">
18
<div class="line number19 index18 alt2" style="border-width:0px 3px 0px 0px!important; border-right-style:solid!important; border-right-color:rgb(108,108)!important; margin:0px!important; padding:0px 0.5em 0px 1em!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important; white-space:pre!important">
19
<div class="line number20 index19 alt1" style="border-width:0px 3px 0px 0px!important; border-right-style:solid!important; border-right-color:rgb(108,108)!important; margin:0px!important; padding:0px 0.5em 0px 1em!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important; white-space:pre!important">
20
<div class="line number21 index20 alt2" style="border-width:0px 3px 0px 0px!important; border-right-style:solid!important; border-right-color:rgb(108,108)!important; margin:0px!important; padding:0px 0.5em 0px 1em!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important; white-space:pre!important">
21
<div class="line number22 index21 alt1" style="border-width:0px 3px 0px 0px!important; border-right-style:solid!important; border-right-color:rgb(108,108)!important; margin:0px!important; padding:0px 0.5em 0px 1em!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important; white-space:pre!important">
22
<div class="line number23 index22 alt2" style="border-width:0px 3px 0px 0px!important; border-right-style:solid!important; border-right-color:rgb(108,108)!important; margin:0px!important; padding:0px 0.5em 0px 1em!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important; white-space:pre!important">
23
<div class="line number24 index23 alt1" style="border-width:0px 3px 0px 0px!important; border-right-style:solid!important; border-right-color:rgb(108,108)!important; margin:0px!important; padding:0px 0.5em 0px 1em!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important; white-space:pre!important">
24
<div class="line number25 index24 alt2" style="border-width:0px 3px 0px 0px!important; border-right-style:solid!important; border-right-color:rgb(108,108)!important; margin:0px!important; padding:0px 0.5em 0px 1em!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important; white-space:pre!important">
25
<div class="line number26 index25 alt1" style="border-width:0px 3px 0px 0px!important; border-right-style:solid!important; border-right-color:rgb(108,108)!important; margin:0px!important; padding:0px 0.5em 0px 1em!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important; white-space:pre!important">
26
<div class="line number27 index26 alt2" style="border-width:0px 3px 0px 0px!important; border-right-style:solid!important; border-right-color:rgb(108,108)!important; margin:0px!important; padding:0px 0.5em 0px 1em!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important; white-space:pre!important">
27
<div class="line number28 index27 alt1" style="border-width:0px 3px 0px 0px!important; border-right-style:solid!important; border-right-color:rgb(108,108)!important; margin:0px!important; padding:0px 0.5em 0px 1em!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important; white-space:pre!important">
28
<div class="line number29 index28 alt2" style="border-width:0px 3px 0px 0px!important; border-right-style:solid!important; border-right-color:rgb(108,108)!important; margin:0px!important; padding:0px 0.5em 0px 1em!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important; white-space:pre!important">
29
<div class="line number30 index29 alt1" style="border-width:0px 3px 0px 0px!important; border-right-style:solid!important; border-right-color:rgb(108,108)!important; margin:0px!important; padding:0px 0.5em 0px 1em!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important; white-space:pre!important">
30
<div class="line number31 index30 alt2" style="border-width:0px 3px 0px 0px!important; border-right-style:solid!important; border-right-color:rgb(108,108)!important; margin:0px!important; padding:0px 0.5em 0px 1em!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important; white-space:pre!important">
31
<div class="line number32 index31 alt1" style="border-width:0px 3px 0px 0px!important; border-right-style:solid!important; border-right-color:rgb(108,108)!important; margin:0px!important; padding:0px 0.5em 0px 1em!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important; white-space:pre!important">
32
<div class="line number33 index32 alt2" style="border-width:0px 3px 0px 0px!important; border-right-style:solid!important; border-right-color:rgb(108,108)!important; margin:0px!important; padding:0px 0.5em 0px 1em!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important; white-space:pre!important">
33
<div class="line number34 index33 alt1" style="border-width:0px 3px 0px 0px!important; border-right-style:solid!important; border-right-color:rgb(108,108)!important; margin:0px!important; padding:0px 0.5em 0px 1em!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important; white-space:pre!important">
34
<div class="line number35 index34 alt2" style="border-width:0px 3px 0px 0px!important; border-right-style:solid!important; border-right-color:rgb(108,108)!important; margin:0px!important; padding:0px 0.5em 0px 1em!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important; white-space:pre!important">
35
<div class="line number36 index35 alt1" style="border-width:0px 3px 0px 0px!important; border-right-style:solid!important; border-right-color:rgb(108,108)!important; margin:0px!important; padding:0px 0.5em 0px 1em!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important; white-space:pre!important">
36
<div class="line number37 index36 alt2" style="border-width:0px 3px 0px 0px!important; border-right-style:solid!important; border-right-color:rgb(108,108)!important; margin:0px!important; padding:0px 0.5em 0px 1em!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important; white-space:pre!important">
37
<div class="line number38 index37 alt1" style="border-width:0px 3px 0px 0px!important; border-right-style:solid!important; border-right-color:rgb(108,108)!important; margin:0px!important; padding:0px 0.5em 0px 1em!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important; white-space:pre!important">
38
<div class="line number39 index38 alt2" style="border-width:0px 3px 0px 0px!important; border-right-style:solid!important; border-right-color:rgb(108,108)!important; margin:0px!important; padding:0px 0.5em 0px 1em!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important; white-space:pre!important">
39
<div class="line number40 index39 alt1" style="border-width:0px 3px 0px 0px!important; border-right-style:solid!important; border-right-color:rgb(108,108)!important; margin:0px!important; padding:0px 0.5em 0px 1em!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important; white-space:pre!important">
40
<div class="line number41 index40 alt2" style="border-width:0px 3px 0px 0px!important; border-right-style:solid!important; border-right-color:rgb(108,108)!important; margin:0px!important; padding:0px 0.5em 0px 1em!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important; white-space:pre!important">
41
<div class="line number42 index41 alt1" style="border-width:0px 3px 0px 0px!important; border-right-style:solid!important; border-right-color:rgb(108,108)!important; margin:0px!important; padding:0px 0.5em 0px 1em!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important; white-space:pre!important">
42
<div class="line number43 index42 alt2" style="border-width:0px 3px 0px 0px!important; border-right-style:solid!important; border-right-color:rgb(108,108)!important; margin:0px!important; padding:0px 0.5em 0px 1em!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important; white-space:pre!important">
43
<div class="line number44 index43 alt1" style="border-width:0px 3px 0px 0px!important; border-right-style:solid!important; border-right-color:rgb(108,108)!important; margin:0px!important; padding:0px 0.5em 0px 1em!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important; white-space:pre!important">
44
<div class="line number45 index44 alt2" style="border-width:0px 3px 0px 0px!important; border-right-style:solid!important; border-right-color:rgb(108,108)!important; margin:0px!important; padding:0px 0.5em 0px 1em!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important; white-space:pre!important">
45
<div class="line number46 index45 alt1" style="border-width:0px 3px 0px 0px!important; border-right-style:solid!important; border-right-color:rgb(108,108)!important; margin:0px!important; padding:0px 0.5em 0px 1em!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important; white-space:pre!important">
46
<div class="line number47 index46 alt2" style="border-width:0px 3px 0px 0px!important; border-right-style:solid!important; border-right-color:rgb(108,108)!important; margin:0px!important; padding:0px 0.5em 0px 1em!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important; white-space:pre!important">
47
<div class="line number48 index47 alt1" style="border-width:0px 3px 0px 0px!important; border-right-style:solid!important; border-right-color:rgb(108,108)!important; margin:0px!important; padding:0px 0.5em 0px 1em!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important; white-space:pre!important">
48
<div class="line number49 index48 alt2" style="border-width:0px 3px 0px 0px!important; border-right-style:solid!important; border-right-color:rgb(108,108)!important; margin:0px!important; padding:0px 0.5em 0px 1em!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important; white-space:pre!important">
49
<div class="line number50 index49 alt1" style="border-width:0px 3px 0px 0px!important; border-right-style:solid!important; border-right-color:rgb(108,108)!important; margin:0px!important; padding:0px 0.5em 0px 1em!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important; white-space:pre!important">
50
<div class="line number51 index50 alt2" style="border-width:0px 3px 0px 0px!important; border-right-style:solid!important; border-right-color:rgb(108,108)!important; margin:0px!important; padding:0px 0.5em 0px 1em!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important; white-space:pre!important">
51
<div class="line number52 index51 alt1" style="border-width:0px 3px 0px 0px!important; border-right-style:solid!important; border-right-color:rgb(108,108)!important; margin:0px!important; padding:0px 0.5em 0px 1em!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important; white-space:pre!important">
52
<div class="line number53 index52 alt2" style="border-width:0px 3px 0px 0px!important; border-right-style:solid!important; border-right-color:rgb(108,108)!important; margin:0px!important; padding:0px 0.5em 0px 1em!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important; white-space:pre!important">
53
<div class="line number54 index53 alt1" style="border-width:0px 3px 0px 0px!important; border-right-style:solid!important; border-right-color:rgb(108,108)!important; margin:0px!important; padding:0px 0.5em 0px 1em!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important; white-space:pre!important">
54
<div class="line number55 index54 alt2" style="border-width:0px 3px 0px 0px!important; border-right-style:solid!important; border-right-color:rgb(108,108)!important; margin:0px!important; padding:0px 0.5em 0px 1em!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important; white-space:pre!important">
55
<div class="line number56 index55 alt1" style="border-width:0px 3px 0px 0px!important; border-right-style:solid!important; border-right-color:rgb(108,108)!important; margin:0px!important; padding:0px 0.5em 0px 1em!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important; white-space:pre!important">
56
<div class="line number57 index56 alt2" style="border-width:0px 3px 0px 0px!important; border-right-style:solid!important; border-right-color:rgb(108,108)!important; margin:0px!important; padding:0px 0.5em 0px 1em!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important; white-space:pre!important">
57
<div class="line number58 index57 alt1" style="border-width:0px 3px 0px 0px!important; border-right-style:solid!important; border-right-color:rgb(108,108)!important; margin:0px!important; padding:0px 0.5em 0px 1em!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important; white-space:pre!important">
58
<div class="line number59 index58 alt2" style="border-width:0px 3px 0px 0px!important; border-right-style:solid!important; border-right-color:rgb(108,108)!important; margin:0px!important; padding:0px 0.5em 0px 1em!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important; white-space:pre!important">
59
<div class="line number60 index59 alt1" style="border-width:0px 3px 0px 0px!important; border-right-style:solid!important; border-right-color:rgb(108,108)!important; margin:0px!important; padding:0px 0.5em 0px 1em!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important; white-space:pre!important">
60
<div class="line number61 index60 alt2" style="border-width:0px 3px 0px 0px!important; border-right-style:solid!important; border-right-color:rgb(108,108)!important; margin:0px!important; padding:0px 0.5em 0px 1em!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important; white-space:pre!important">
61
<div class="line number62 index61 alt1" style="border-width:0px 3px 0px 0px!important; border-right-style:solid!important; border-right-color:rgb(108,108)!important; margin:0px!important; padding:0px 0.5em 0px 1em!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important; white-space:pre!important">
62
<div class="line number63 index62 alt2" style="border-width:0px 3px 0px 0px!important; border-right-style:solid!important; border-right-color:rgb(108,108)!important; margin:0px!important; padding:0px 0.5em 0px 1em!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important; white-space:pre!important">
63
<div class="line number64 index63 alt1" style="border-width:0px 3px 0px 0px!important; border-right-style:solid!important; border-right-color:rgb(108,108)!important; margin:0px!important; padding:0px 0.5em 0px 1em!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important; white-space:pre!important">
64
<div class="line number65 index64 alt2" style="border-width:0px 3px 0px 0px!important; border-right-style:solid!important; border-right-color:rgb(108,108)!important; margin:0px!important; padding:0px 0.5em 0px 1em!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important; white-space:pre!important">
65
<div class="line number66 index65 alt1" style="border-width:0px 3px 0px 0px!important; border-right-style:solid!important; border-right-color:rgb(108,108)!important; margin:0px!important; padding:0px 0.5em 0px 1em!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important; white-space:pre!important">
66
<div class="line number67 index66 alt2" style="border-width:0px 3px 0px 0px!important; border-right-style:solid!important; border-right-color:rgb(108,108)!important; margin:0px!important; padding:0px 0.5em 0px 1em!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important; white-space:pre!important">
67
<div class="line number68 index67 alt1" style="border-width:0px 3px 0px 0px!important; border-right-style:solid!important; border-right-color:rgb(108,108)!important; margin:0px!important; padding:0px 0.5em 0px 1em!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important; white-space:pre!important">
68
<div class="line number69 index68 alt2" style="border-width:0px 3px 0px 0px!important; border-right-style:solid!important; border-right-color:rgb(108,108)!important; margin:0px!important; padding:0px 0.5em 0px 1em!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important; white-space:pre!important">
69
<div class="line number70 index69 alt1" style="border-width:0px 3px 0px 0px!important; border-right-style:solid!important; border-right-color:rgb(108,108)!important; margin:0px!important; padding:0px 0.5em 0px 1em!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important; white-space:pre!important">
70
<div class="line number71 index70 alt2" style="border-width:0px 3px 0px 0px!important; border-right-style:solid!important; border-right-color:rgb(108,108)!important; margin:0px!important; padding:0px 0.5em 0px 1em!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important; white-space:pre!important">
71
<div class="line number72 index71 alt1" style="border-width:0px 3px 0px 0px!important; border-right-style:solid!important; border-right-color:rgb(108,108)!important; margin:0px!important; padding:0px 0.5em 0px 1em!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important; white-space:pre!important">
72
<div class="line number73 index72 alt2" style="border-width:0px 3px 0px 0px!important; border-right-style:solid!important; border-right-color:rgb(108,108)!important; margin:0px!important; padding:0px 0.5em 0px 1em!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important; white-space:pre!important">
73
<div class="line number74 index73 alt1" style="border-width:0px 3px 0px 0px!important; border-right-style:solid!important; border-right-color:rgb(108,108)!important; margin:0px!important; padding:0px 0.5em 0px 1em!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important; white-space:pre!important">
74
<div class="line number75 index74 alt2" style="border-width:0px 3px 0px 0px!important; border-right-style:solid!important; border-right-color:rgb(108,108)!important; margin:0px!important; padding:0px 0.5em 0px 1em!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important; white-space:pre!important">
75
<div class="line number76 index75 alt1" style="border-width:0px 3px 0px 0px!important; border-right-style:solid!important; border-right-color:rgb(108,108)!important; margin:0px!important; padding:0px 0.5em 0px 1em!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important; white-space:pre!important">
76
<div class="line number77 index76 alt2" style="border-width:0px 3px 0px 0px!important; border-right-style:solid!important; border-right-color:rgb(108,108)!important; margin:0px!important; padding:0px 0.5em 0px 1em!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important; white-space:pre!important">
77
<div class="line number78 index77 alt1" style="border-width:0px 3px 0px 0px!important; border-right-style:solid!important; border-right-color:rgb(108,108)!important; margin:0px!important; padding:0px 0.5em 0px 1em!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important; white-space:pre!important">
78
<div class="line number79 index78 alt2" style="border-width:0px 3px 0px 0px!important; border-right-style:solid!important; border-right-color:rgb(108,108)!important; margin:0px!important; padding:0px 0.5em 0px 1em!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important; white-space:pre!important">
79
<div class="line number80 index79 alt1" style="border-width:0px 3px 0px 0px!important; border-right-style:solid!important; border-right-color:rgb(108,108)!important; margin:0px!important; padding:0px 0.5em 0px 1em!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important; white-space:pre!important">
80
<div class="line number81 index80 alt2" style="border-width:0px 3px 0px 0px!important; border-right-style:solid!important; border-right-color:rgb(108,108)!important; margin:0px!important; padding:0px 0.5em 0px 1em!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important; white-space:pre!important">
81
</td>
<td class="code" style="border:0px!important; margin:0px!important; padding:0px!important; vertical-align:baseline!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; width:100%!important; font-family:Consolas,monospace!important; min-height:inherit!important">
<div class="container" style="border:0px!important; margin:0px!important; padding:0px!important; width:auto!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:relative!important; right:auto!important; top:auto!important; vertical-align:baseline!important; min-height:inherit!important">
<div class="line number1 index0 alt2" style="border:0px!important; margin:0px!important; padding:0px 1em!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important; white-space:pre!important">
<code class="java keyword" style="border:0px!important; margin:0px!important; padding:0px!important; font-family:Consolas,monospace!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; vertical-align:baseline!important; width:auto!important; font-weight:bold!important; min-height:inherit!important; color:rgb(0,102,153)!important">import<code class="java plain" style="border:0px!important; margin:0px!important; padding:0px!important; font-family:Consolas,monospace!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important">java.io.FileInputStream;

文件

输出为：

Highlighter_6139" class="SyntaxHighlighter notranslate java" style="border:0px; margin:1em 0px!important; padding:1px!important; font-size:12px!important; width:100%!important; position:relative!important; overflow-y:hidden!important; overflow-x:auto!important; font-family:Consolas,108)!important; margin:0px!important; padding:0px 0.5em 0px 1em!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 7

文件中获取到信息。

内容在序列化后无法获得访问。

方法和类。注意，本地变量是不能被transient关键字修饰的。变量如果是用户自定义类变量，则该类需要实现Serializable接口。

加上static关键字后，程序运行结果依然不变，即static类型的username也读出来为“Alexia”了，这不与第三点说的矛盾吗？实际上是这样的：第三点确实没错（一个静态变量不管是否被transient修饰，均不能被序列化），反序列化后类中static型变量username的值为当前JVM中对应static变量的值，这个值是JVM中的不是反序列化得出的，不相信？好吧，下面我来证明：

Highlighter_299115" class="SyntaxHighlighter notranslate java " style="border:0px; margin:1em 0px!important; padding:1px!important; font-size:12px!important; width:100%!important; position:relative!important; overflow-y:hidden!important; overflow-x:auto!important; font-family:Consolas,108)!important; margin:0px!important; padding:0px 0.5em 0px 1em!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 81
Highlighter_73576" class="SyntaxHighlighter notranslate java" style="border:0px; margin:1em 0px!important; padding:1px!important; font-size:12px!important; width:100%!important; position:relative!important; overflow-y:hidden!important; overflow-x:auto!important; font-family:Consolas,monospace!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important">username: jmwang
修改后jmwang，而不是序列化时的值Alexia。

Highlighter_240823" class="SyntaxHighlighter notranslate java" style="border:0px; margin:1em 0px!important; padding:1px!important; font-size:12px!important; width:100%!important; position:relative!important; overflow-y:hidden!important; overflow-x:auto!important; font-family:Consolas,108)!important; margin:0px!important; padding:0px 0.5em 0px 1em!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 48

输出来了，是的，运行结果就是：

Highlighter_150487" class="SyntaxHighlighter notranslate java" style="border:0px; margin:1em 0px!important; padding:1px!important; font-size:12px!important; width:100%!important; position:relative!important; overflow-y:hidden!important; overflow-x:auto!important; font-family:Consolas,108)!important; margin:0px!important; padding:0px 0.5em 0px 1em!important; bottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.1em!important; outline:0px!important; overflow:visible!important; position:static!important; right:auto!important; text-align:right!important; top:auto!important; vertical-align:baseline!important; width:auto!important; min-height:inherit!important; white-space:pre!important"> 1

自动进行，若实现的是Externalizable接口，则没有任何东西可以自动序列化，需要在writeExternal方法中进行手工指定所要序列化的变量，这与是否被transient修饰无关。因此第二个例子输出的是变量content初始化的内容，而不是null。

猜你在找的Java相关文章

ArrayList源码分析
ArrayList简介：ArrayList 的底层是数组队列，相当于动态数组。与 Java 中的数组相比，它的...
java多线程与并发（基础篇）
一、进程与线程 进程：是代码在数据集合上的一次运行活动，是系统进行资源分配和调度的基本...
LinkedList 的实现原理
本文为博客园作者所写：&#160;一寸HUI，个人博客地址：https://www.cnblogs.com/zsql/...
java之面向对象详解
#############java面向对象详解#############1、面向对象基本概念2、类与对象3、类和对象的...
java之异常详解
一、什么是异常? 异常就是有异于常态，和正常情况不一样，有错误出错。在java中，阻止当前...
Map的四种遍历
//Map的四种遍历方法 //Map不能直接遍历 ，只能通过遍历Key与Value间接遍历 public static...
throw和throws的区别以及try,catch,finally在有return的情况下执行的顺序
一，抛出异常有三种形式，一是throw,一个throws，还有一种系统自动抛异常。下面它们之间的...
Jdk14 都要出了，Jdk9 的新特性还不了解一下？
中最大的亮点是 Java 平台模块化 的引入，以及模块化 JDK。但是 还有很多其他新功能，这篇...
还看不懂同事代码？快来补一波 Java 7 语法特性
Jdk 频繁更新，新特性了解吗？每次更新都注重提高生产效率，提高 JVM 性能，推行模块化等，...
Java 12 新特性介绍，快来补一补
Java 12 早在 2019 年 3 月 19 日发布，这些新特性你知道吗
PHPJavaJava SEPythonC#C&C++RubyVBasp.NetGoPerlnettyDjangoDelphiJsp.NET CoreSpringFlaskSpringbootSpringMVCLuaLaravelMybatisAspGroovyThinkPHPYiiswoole
文件时间pythonm相等性PHP Warning时间问题问题解决pcntl_signal采样点wav模块动态文本调用频率限制对外暴露多个访问请求更新数据表模型结构type()方法比较速度手写体sobel算子保存模型Image类nn.Conv2dpytorch1.0kaggleDCGAN交并比range()用法打印模型反卷积卷积