这次给大家带来Ajax传输Json和xml数据步奏详解（附代码），Ajax传输Json和xml数据的注意事项有哪些，下面就是实战案例，一起来看一下。
ajax传输xml数据：只要把数据封装成xml格式就可以实现传输，前台js用responseXML接收xml参数，后台读取用流和dom4j来解析
前台页面
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%> <%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>Ajax XML数据处理演示 Name:
Age:
后台页面
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%> <%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>Ajax XML数据处理演示 Name:
Age:
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Ajax传输Json数据的要点利用Apache或者阿里巴巴的JSONArray类进行传输
前台代码
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%> <%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>Ajax Json数据处理演示
JsonServlet1.java
package cn.hncu.servlet;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import cn.hncu.domain.User;
public class JsonServlet1 extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doPost(request, response);
}
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
//调用后台service.dao.query()，到数据库当中把信息读取出来
//为简化知识点的理解，此处后台部分的功能直接模拟
response.setContentType("text/html;charset=utf-8");
PrintWriter out = response.getWriter();
List users = new ArrayList();
users.add(new User("A001","Jack",20));
users.add(new User("A002","Rose",22));
users.add(new User("B001","张三",20));
users.add(new User("B002","李四",30));
String json="";
//用java封装出json格式的字符串：[{name:"Jack",age:25}, {...}, {...} ]
for(User u:users){
if(json.equals("")){
json="{name:\""+u.getName()+"\",id:\""+u.getId()+"\",age:"+u.getAge()+"}";
}else{
json = json +",{ name:\""+u.getName()+"\",id:\""+u.getId()+"\",age:"+u.getAge()+"}" ;
}
}
json="["+json+"]";
out.print(json);
}
} JsonServlet2.java
package cn.hncu.servlet;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import cn.hncu.domain.User;
import net.sf.json.JSONArray;
import net.sf.json.JSONObject;
public class JsonServlet2 extends HttpServlet {
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html;charset=utf-8");
PrintWriter out = response.getWriter();
List users = new ArrayList();
users.add(new User("A001","Jack",20));
users.add(new User("A002","Rose",22));
users.add(new User("B001","张三",20));
users.add(new User("B002","李四",30));
String strJson=com.alibaba.fastjson.JSONArray.toJSONString(users);
System.out.println(strJson);
//用fastjson工具(只有一个jar包)帮我们把list转换成json串
Map map = new HashMap();
map.put("addr", "湖南");
map.put("height", "170");
map.put("marry", "no");
map.put("user", new User("A003","小李",25));
String strMap=com.alibaba.fastjson.JSONArray.toJSONString(map);
out.print(strMap.toString());
}
} JsonServlet3.java
package cn.hncu.servlet;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import net.sf.json.JSONArray;
import net.sf.json.JSONObject;
import cn.hncu.domain.User;
public class JsonServlet3 extends HttpServlet {
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html;charset=utf-8");
PrintWriter out = response.getWriter();
List users = new ArrayList();
users.add(new User("A001","Jack",20));
users.add(new User("A002","Rose",22));
users.add(new User("B001","张三",20));
users.add(new User("B002","李四",30));
//用fastjson工具(只有一个jar包)帮我们把list转换成json串
JSONArray json=JSONArray.fromObject(users);
String strJson=json.toString();
System.out.println(strJson);
Map map = new HashMap();
map.put("addr", "湖南");
map.put("height", "170");
map.put("marry", "no");
map.put("user", new User("A003","小李",25));
JSONObject obj = JSONObject.fromObject(map);
System.out.println(obj.toString());
out.print(obj.toString());
}
} 相信看了本文案例你已经掌握了方法，更多精彩请关注php中文网其它相关文章！
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