1、表单验证/字典/往url传值
<input type="text" id="txt1" onkeyup="showHint(this.value)" />
<span id="txtHint"></span>
xmlhttp.open("GET","/ajax/gethint.asp?q="+str,true);
document.getElementById("txtHint").innerHTML=xmlhttp.responseText;
http://www.w3school.com.cn/tiy/t.asp?f=ajax_suggest
2、ajax+springmvc+json 前端接收mvc传递来的json数据
<%@ page language="java" contentType="text/html; charset=utf-8" pageEncoding="utf-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<Meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>ajax for springMVC</title>
<script type="text/javascript" src="js/jquery-1.8.3.min.js"></script>
<script type="text/javascript">
$(function() {
$("#click").click(function() {
$.ajax( {
type : "GET",url : "ajax.do",data : "name=zhangsan&age=20",dataType: "text",success : function(msg) {
//jquery解析json
var obj = $.parseJSON(msg)
alert(obj.name);
alert(obj.age);
$("#show").val(msg);
}
});
});
});
</script>
</head>
<body>
<input id="click" type="button" value="click to show person" />
<input id="show" />
</body>
</html>
@RequestMapping(value = "ajax.do",method = RequestMethod.GET)
public void ajax(@modelattribute Person person,PrintWriter printWriter) {
String jsonString = JSON.toJSONString(person,SerializerFeature.PrettyFormat);
printWriter.write(jsonString);
printWriter.flush();
printWriter.close();
}
项目地址：http://download.csdn.net/detail/nickfover/8249075
3、ajax+springmvc+json ajax向springmvc传递json
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<script type="text/javascript" src="js/jquery-1.8.3.min.js"></script>
<Meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
<script type="text/javascript">
$(document).ready(function(){
//传递字符串格式json对象到后台（一个json对象）
$("#resolveJsonObject").click(function(){
var userName =encodeURI($("#userName").attr("value"));
var age = encodeURI($("#age").attr("value"));
//向mvc传递json对象
var user = {userName:userName,age:age};
var aMenu = encodeURI(JSON.stringify(user));
$.ajax({
url:"resolveJsonObject",data:"orderJson=" + aMenu,success:function(data){
}
});
});
//传递json数组到后台
$("#resolveJsonArray").click(function(){
var userName =encodeURI($("#userName").attr("value"));
var age = encodeURI($("#age").attr("value"));
//数组开始
var user1 = {userName:userName,age:age};
var allMenu={
"menu":[ ]
};
allMenu.menu.push(user1);
var allMenu1 = encodeURI(JSON.stringify(allMenu));
$.ajax({
//json数组
url:"resolveJsonArray",data:"orderJson=" + allMenu1,success:function(data){
}
});
});
//接收后台的json在前台解析
$("#resolveJson").click(function(){
$.ajax({
//解析从后台返回的json数据
url:"resolveJson",type:"post",success:function(data){
var arr=eval(data);
for(var m = 0;m<arr.length;m++){
alert(arr[m].user.userName);
}
}
});
});
});
</script>
</head>
<body>
<h1>json添加用户</h1>
姓名：<input id="userName" type="text" name="userName">
年龄:<input id="age" type="text" name="age"><br>
<input type="button" id="resolveJsonObject" value="json对象">
<input type="button" id="resolveJsonArray" value="json数组">
<input type="button" id="resolveJson" value="前端解析json字符串">
</body>
</html>
package org.nick.web;
import java.io.IOException;
import java.io.PrintWriter;
import java.net.URLDecoder;
import java.util.ArrayList;
import java.util.List;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import net.sf.json.JSONArray;
import net.sf.json.JSONObject;
import org.nick.demo.Person;
import org.nick.demo.User;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.serializer.SerializerFeature;
@Controller
public class BaseController {
@RequestMapping("/link")
public String fun3(){
return "/link";
}
@RequestMapping("toAjax.do")
public String toAjax() {
return "ajax";
}
@RequestMapping(value = "ajax.do",SerializerFeature.PrettyFormat);
printWriter.write(jsonString);
printWriter.flush();
printWriter.close();
}
//接收前台传过来的字符串格式的json对象，在后台进行解析
@RequestMapping("/resolveJsonObject" )
public void resolveJsonObject(HttpServletRequest request,HttpServletResponse response) throws IOException {
//解码
String str = URLDecoder.decode(request.getParameter("orderJson"),"UTF-8");
JSONObject jb=new JSONObject();
//将json格式的字符串转换为json对象，并取得该对象的“userName”属性值
String o=(String)jb.fromObject(str).get("userName");
System.out.println(o);
}
//传递json数组字符串
@RequestMapping("/resolveJsonArray" )
public void resolveJsonArray(HttpServletRequest request,HttpServletResponse response) throws IOException {
//解码，为了解决中文乱码
String str = URLDecoder.decode(request.getParameter("orderJson"),"UTF-8");
JSONObject jb=new JSONObject();
//将json格式的字符串转换为json数组对象
JSONArray array=(JSONArray)jb.fromObject(str).get("menu");
//取得json数组中的第一个对象
JSONObject o = (JSONObject) array.get(0);//获得第一个array结果
//取出json数组中第一个对象的“userName”属性值
String name=o.get("userName").toString();//获得属性值
System.out.println(name);
}
//通过该函数返回json格式的数据，在前台通过JQuery进行解析
@RequestMapping("/resolveJson" )
public void resolveJson(HttpServletRequest request,HttpServletResponse response) throws IOException {
List m = (List) new ArrayList();
JSONArray jsons = new JSONArray();
for(int i=0;i<10;i++){
User user = new User();
user.setUserName("name_" + i);
m.add(user);
}
for(int j=0;j<m.size();j++){
JSONObject jsonObject = new JSONObject();
jsonObject.put("user",m.get(j));
jsons.add(jsonObject);
}
//火狐浏览器要添加如下格式设置utf-8
response.setContentType("text/html;charset=UTF-8");
System.out.println(jsons.toString());
response.getWriter().print(jsons.toString()) ;
}
@RequestMapping("/toJson" )
public String toJson() {
return "/json";
}
}
http://localhost:8080/springmvc/link
项目下载：http://download.csdn.net/detail/nickfover/8251017
