struts2.1实现ajax通信

kenter1643

首先去下载 http://code.google.com/p/jsonplugin/downloads/list 先
还有记得加埋strtus官方lib里面有关json的jar包
然后添加测试action
package com.json;import java.util.HashMap;import java.util.Map;import javax.servlet.http.HttpServletRequest;import org.apache.struts2.interceptor.ServletRequestAware;import com.googlecode.jsonplugin.annotations.JSON;import com.opensymphony.xwork2.ActionSupport;@SuppressWarnings("unchecked")public class JSONExample extends ActionSupport implements  ServletRequestAware{private static final long serialVersionUID = 8465922425903754099L;private String tip;private Map map = new HashMap();private HttpServletRequest request;@JSON(name="testMap")public Map getMap() {return map;}public void setMap(Map map) {this.map = map;}@JSON(name="newName")public String getTip() {return tip;}public void setTip(String tip) {this.tip = tip;}@Overridepublic String execute() throws Exception {setTip( "系统中已有用户名，请重新选择一个！");this.map.put("ok", "dd");this.map.put("ss", "lal");System.out.println("************"+this.request.getParameter("name"));return SUCCESS;}@Overridepublic void setServletRequest(HttpServletRequest arg0) {this.request = arg0;}} 页面使用jqurey
<script type="text/javascript" src="jquery.js"></script><script type="text/javascript">$(document).ready( function() {$("a").click( function() {$.getJSON("JSONExample.action","name="+$("#asdf").value, function(json){  $("#ss").html(json.testMap.ss);  $("#ok").html(json.testMap.ok);  $("#newName").html(json.newName);}); });});</script><a href="#">dfdf</a><div id ="ss"></div><br><div id="newName"></div><br><div id ="ok"></div> struts.xml中加入
<constant name="struts.i18n.encoding" value="UTF-8"/><package name="com.json" extends="json-default"><action name="JSONExample" class="com.json.JSONExample"><result type="json" /></action></package> 然后试试