第一种:DOM解析xml
、核心类:
DocumentBuilderFactory
DocumentBuilder
Doucment
Element
NodeList
Node
2、核心代码:
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
// 使用工厂来实例化一个构造Document的对象
DocumentBuilder builder = factory.newDocumentBuilder();
// 利用DocumentBuilder来构造一个Document对象
Document document = builder.parse(filename);
// 获取Document文档的根节点对象
Element root = document.getDocumentElement();
// 通过根节点,获取到根节点下面的所有二级子节点
NodeList nodeList = root.getChildNodes();
// 遍历子节点,获取内部的每一个节点
for (int i = 0; i < nodeList.getLength(); i++) {
Node node = nodeList.item(i);
// 获取每个末端阶段的文本值和节点名称,将其存入到Map对象中
map.put(item.getNodeName(),item.getTextContent());
list.add(map);
}
第二种:DOM解析xml
1、核心类:
XmlPullParserFactory
XmlPullParser
2、核心代码:
1 // 实例化一个xml pull解析的工厂
2 XmlPullParserFactory factory = XmlPullParserFactory.newInstance();
3 // 实例化一个xml pull解析对象
4 XmlPullParser pullParser = factory.newPullParser();
5 // 将xml文件作为流传入到inputstream
6 BufferedInputStream bis = new BufferedInputStream(
7 new FileInputStream("customers.xml"));
8
9 // xml解析对象接收输入流对象
10 pullParser.setInput(bis,"utf-8");
11
12 int event = pullParser.getEventType();
13 List<Map<String,Object>> list = null;
14 Map<String,Object> map = null;
15
16 while (event != XmlPullParser.END_DOCUMENT) {
17 switch (event) {
18 case XmlPullParser.START_DOCUMENT:
19 list = new ArrayList<>();
20 break;
21 case XmlPullParser.START_TAG:
22 if ("customer".equals(pullParser.getName())) {
23 map = new HashMap<String,Object>();
24 }
25 if (pullParser.getName().equals("name")) {
26 map.put("name",pullParser.nextText());
27 }
28 if (pullParser.getName().equals("tel")) {
29 map.put("tel",pullParser.nextText());
30 }
31 // if (pullParser.getName().equals("email")) {
32 // map.put("email",pullParser.nextText());
33 // }
34 break;
35 case XmlPullParser.END_TAG:
36 if (pullParser.getName().equals("customer")) {
37 list.add(map);
38 }
39 break;
40 }
41 event = pullParser.next();
42 }