struts2-----ajax-------xml_struts2 多个ajax的xml-优快云博客

本文链接：https://blog.youkuaiyun.com/taxiangwuhen/article/details/8022967
1.struts的应用jar包（最简）、dom4j包
2.前台页面：ajax/ajaxSelected.jsp
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    
	<script type="text/javascript" src="../js/jquery-1.8.0.min.js"></script>
	<!--
	<link rel="stylesheet" type="text/css" href="styles.css">
	-->
	<script type="text/javascript">
		$(document).ready(function()
		{
			$("#ajaxButton").bind("click",function()
			{
				$.post("ajaxAction.action",
				{
					username:$("select[name=username]").val()
				},function(returnedData,status)
				{
						//	alert(returnedData);
							var idvalue = $(returnedData).find("id").text();
							var namevalue = $(returnedData).find("username").text();
							var agevalue = $(returnedData).find("age").text();
							 var addressvalue = $(returnedData).find("address").text();
							//alert(39);
							var html = "<table border='1'><tr><th>id</th><th>name</th><th>age</th><th>address</th></tr><tr><td>"+idvalue+"</td><td>"+namevalue+"</td><td>"+agevalue+"</td><td>"+addressvalue+"</td></table>";
							
							$("body table:eq(0)").remove();
							// alert(43);
							$("body").append(html);	
				
				});
		
			});
		 });
			
		
	</script>

  </head>
  
  <body>
    	<select name="username">
    		<option value="zhangsan">zhangsan</option>
    		<option value="lisi">lisi</option>
    	</select>
    	<input type="button" value="getINFo" id="ajaxButton">
  </body>
</html>


struts.xml
	<package name="ajax" extends="struts-default" namespace="/ajax" >
		<action name="ajaxAction" class="com.lizp.action.AjaxAction">
			
		</action>
	</package>


Action
package com.lizp.action;

import java.io.PrintWriter;
import java.util.Date;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.struts2.ServletActionContext;
import org.dom4j.Document;
import org.dom4j.DocumentHelper;
import org.dom4j.Element;
import org.dom4j.io.OutputFormat;
import org.dom4j.io.XMLWriter;

import com.lizp.bean.Person;
import com.opensymphony.xwork2.ActionSupport;


public class AjaxAction extends ActionSupport
{
	private String username;
	
	
	public String getUsername()
	{
		return username;
	}
	public void setUsername(String username)
	{
		this.username = username;
	}
	
	@Override
	public String execute() throws Exception
	{
		// System.out.println("this.username:"+this.username);
		Person person = new Person();
		if("zhangsan".equals(this.username))
		{
			person.setId(1);
			person.setUsername("zhangsan");
			person.setAge(25);
			//person.setBirthday(new Date("2012-12-01"));
		}else {
			person.setId(2);
			person.setUsername("lis");
			person.setAge(26);
			//person.setBirthday(new Date("2012-12-02"));
		}
		
		//返回一个xml的信息
		Document document = DocumentHelper.createDocument();
		Element message = document.addElement("message");
		document.setRootElement(message);
		message.addComment("This is a Comment!");
		
		Element idElement = message.addElement("id");
		idElement.setText(person.getId()+"");
		Element usernamElement = message.addElement("username");
		usernamElement.setText(person.getUsername());
		Element ageElement = message.addElement("age");
		ageElement.setText(person.getAge()+"");
		Element birthdayElement = message.addElement("birthday");
		birthdayElement.setText(person.getBirthday()+"");
		
		// System.out.println("document:"+document);
		//拿到HttpServletResponser对象
		HttpServletResponse response = ServletActionContext.getResponse();
		response.setContentType("text/xml;charset=utf-8");
		response.setHeader("Cache-control","no-cache");
		response.setHeader("pragma","no-cache");
		
		//拿到一个输出的对象
		PrintWriter out = response.getWriter();
		
		//格式化输出
		OutputFormat oFormat = new OutputFormat();
		oFormat.setEncoding("utf-8");
		
		
		XMLWriter xmlWriter = new XMLWriter(out,oFormat);
		xmlWriter.write(document);
		
		out.flush();
		out.close();				
		
		//必须返回值，此处返回个无意义的null
		return null ;
	}

}