struts2的方式返回json到jsp页面 List,Map,Object,对象各种操作都有....MyEclipse的，导...

package com.andon.mao.user.action; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Map; import com.andon.mao.user.entity.User; import com.opensymphony.xwork2.ActionSupport; /** * @author mao * @date Date:2014-6-15 Time: 上午09:29:05 * @version 1.0 */ @SuppressWarnings("serial") public class UserAction extends ActionSupport { private String json;// json字符串 private User jsonObject;// json对象 private List<User> jsonList;// json数组 private Map<String, Object> jsonMap;// jsonMap /** * 初始化各种json储存对象 * @init() */ public UserAction() { this.json = new String(); this.jsonObject = new User(); this.jsonList = new ArrayList<User>(); this.jsonMap = new HashMap<String, Object>(); } /** * struts2序列化对象的时候，要返回的方法必须要有getter方法 rn */ public String getJson() { return json; } public User getJsonObject() { return jsonObject; } public List<User> getJsonList() { return jsonList; } public Map<String, Object> getJsonMap() { return jsonMap; } /** * 返回json字符串 * @date Date:2014-6-15 Time: 上午09:39:19 * @return String */ public String returnJson() throws Exception { System.out.println("json"); this.json = "this is a String json to do"; // return super.execute(); return "json"; } /** * 返回json对象 * @date Date:2014-6-15 Time: 上午09:40:29 * @return Object */ public String returnJsonObject() throws Exception { System.out.println("jsonObject"); this.jsonObject.setUserId(1); this.jsonObject.setUserName("json"); this.jsonObject.setPassword("Object to json by struts2"); return "jsonObject"; } /** * 返回json数组 * @date Date:2014-6-15 Time: 上午09:40:59 * @return jsonList */ public String returnJsonList() throws Exception { System.out.println("jsonList"); User jsonObject = new User(); jsonObject.setUserId(1); jsonObject.setUserName("userName"); jsonObject.setPassword("userPwd"); User jsonObject1 = new User(); jsonObject1.setUserId(2); jsonObject1.setUserName("userName1"); jsonObject1.setPassword("userPwd1"); User jsonObject2 = new User(); jsonObject2.setUserId(3); jsonObject2.setUserName("userName2"); jsonObject2.setPassword("userPwd2"); this.jsonList.add(jsonObject); this.jsonList.add(jsonObject1); this.jsonList.add(jsonObject2); return "jsonList"; } /** * 返回jsonMap * @date Date:2014-6-15 Time: 上午09:41:34 * @return jsonMap */ public String returnJsonMap() throws Exception { System.out.println("jsonMap"); User jsonObject = new User(); jsonObject.setUserId(1); jsonObject.setUserName("userName"); jsonObject.setPassword("userPwd"); User jsonObject1 = new User(); jsonObject1.setUserId(2); jsonObject1.setUserName("userName1"); jsonObject1.setPassword("userPwd1"); User jsonObject2 = new User(); jsonObject2.setUserId(3); jsonObject2.setUserName("userName2"); jsonObject2.setPassword("userPwd2"); this.jsonMap.put("1", jsonObject); this.jsonMap.put("2", jsonObject1); this.jsonMap.put("3", jsonObject2); return "jsonMap"; } }