添加json 包：json-lib-2.1-jdk15.jar
在jsp页面中，加入jquery库jquery-1.4.2.js
1. JSP
代码
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
int increasement = 10;
%>
<%@taglib prefix="s" uri="/struts-tags" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<script type="text/javascript" src="js/frame/jquery-1.4.2.js"></script>
<script type="text/javascript" src="js/util.js"></script>
<link rel="stylesheet" href="css/baseType.css" type="text/css"></link>
<script language="javascript">
function getMsg(){
$.ajax({
url:'json/returnMsg.action',
type:'post',
dataType:'json',
success:function(data){
$("#result").html(data.message);
}
});
}
function getUser(){
$("# result ").html("");
$.ajax({
url:'json/returnUser.action',
type:'post',
dataType:'json',
success:function(data){
$("#result").append("用户ID："+data.userInfo.userId+"")
.append("用户名："+data.userInfo.userName+"")
.append("密码："+data.userInfo.password+"");
}
});
}
function getUserList(){
$("# result ").html("");
$.ajax({
url:'json/returnList.action',
type:'post',
dataType:'json',
success:function(data){
$.each(data.userInfosList,function(i,value){
$("#result").append("第"+(i+1)+"个用户")
.append("用户名："+value.userName+"")
.append("密码："+value.password+"");
})
}
});
}
</script>
</head>
<body>
<div id="result"></div>
<input type="button" value="获得单个消息" onclick="getMsg()"/>
<input type="button" value="获得用户信息" onclick="getUser()"/>
<input type="button" value="获得用户列表" onclick="getUserList()"/>
</body>
</html>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
int increasement = 10;
%>
<%@taglib prefix="s" uri="/struts-tags" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<script type="text/javascript" src="js/frame/jquery-1.4.2.js"></script>
<script type="text/javascript" src="js/util.js"></script>
<link rel="stylesheet" href="css/baseType.css" type="text/css"></link>
<script language="javascript">
function getMsg(){
$.ajax({
url:'json/returnMsg.action',
type:'post',
dataType:'json',
success:function(data){
$("#result").html(data.message);
}
});
}
function getUser(){
$("# result ").html("");
$.ajax({
url:'json/returnUser.action',
type:'post',
dataType:'json',
success:function(data){
$("#result").append("用户ID："+data.userInfo.userId+"")
.append("用户名："+data.userInfo.userName+"")
.append("密码："+data.userInfo.password+"");
}
});
}
function getUserList(){
$("# result ").html("");
$.ajax({
url:'json/returnList.action',
type:'post',
dataType:'json',
success:function(data){
$.each(data.userInfosList,function(i,value){
$("#result").append("第"+(i+1)+"个用户")
.append("用户名："+value.userName+"")
.append("密码："+value.password+"");
})
}
});
}
</script>
</head>
<body>
<div id="result"></div>
<input type="button" value="获得单个消息" onclick="getMsg()"/>
<input type="button" value="获得用户信息" onclick="getUser()"/>
<input type="button" value="获得用户列表" onclick="getUserList()"/>
</body>
</html>
2. struts.xml 配置
代码
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
"http://struts.apache.org/dtds/struts-2.0.dtd">
<struts>
<constant name="struts.enable.DynamicMethodInvocation" value="false"/>
<constant name="struts.devMode" value="true" />
<constant name= "struts.multipart.maxSize" value="5242880" />
<constant name="struts.custom.i18n.resources" value="messageResource"/>
<package name="default" namespace="/json" extends="json-default">
<action name="returnMsg" class="com.carel.production.presentation.TestAction" method="returnMsg">
<result name="success" type="json">
<param name="includeProperties">
message
</param>
</result>
</action>
<action name="returnUser"
class="com.carel.production.presentation.TestAction" method="returnUser">
<result name="success" type="json">
<param name="includeProperties">
userInfo\.userId,userInfo\.userName,userInfo\.password
</param>
</result>
</action>
<action name="returnList" class="com.carel.production.presentation.TestAction"
method="returnList">
<result name="success" type="json">
<param name="includeProperties">
userInfosList\[\d+\]\.userName,userInfosList\[\d+\]\.password
</param>
</result>
</action>
</package>
</struts>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
"http://struts.apache.org/dtds/struts-2.0.dtd">
<struts>
<constant name="struts.enable.DynamicMethodInvocation" value="false"/>
<constant name="struts.devMode" value="true" />
<constant name= "struts.multipart.maxSize" value="5242880" />
<constant name="struts.custom.i18n.resources" value="messageResource"/>
<package name="default" namespace="/json" extends="json-default">
<action name="returnMsg" class="com.carel.production.presentation.TestAction" method="returnMsg">
<result name="success" type="json">
<param name="includeProperties">
message
</param>
</result>
</action>
<action name="returnUser"
class="com.carel.production.presentation.TestAction" method="returnUser">
<result name="success" type="json">
<param name="includeProperties">
userInfo\.userId,userInfo\.userName,userInfo\.password
</param>
</result>
</action>
<action name="returnList" class="com.carel.production.presentation.TestAction"
method="returnList">
<result name="success" type="json">
<param name="includeProperties">
userInfosList\[\d+\]\.userName,userInfosList\[\d+\]\.password
</param>
</result>
</action>
</package>
</struts>
3. Action(java pojo)
代码
package com.carel.production.presentation;
import java.util.ArrayList;
import java.util.List;
import com.opensymphony.xwork2.ActionSupport;
public class TestAction extends ActionSupport {
private String message; //使用json返回单个值
private UserInfo userInfo; //使用json返回对象
private List userInfosList; //使用josn返回List对象
/*返回单个值*/
public String returnMsg(){
this.message = "成功返回单个值";
return SUCCESS;
}
/*返回UserInfo对象*/
public String returnUser(){
userInfo = new UserInfo();
userInfo.setUserId(10000);
userInfo.setUserName("刘栋");
userInfo.setPassword("123456");
return SUCCESS;
}
/*返回List对象*/
public String returnList(){
userInfosList = new ArrayList<UserInfo>();
UserInfo u1 = new UserInfo();
u1.setUserId(10000);
u1.setUserName("张三");
u1.setPassword("111111");
UserInfo u2 = new UserInfo();
u2.setUserId(10001);
u2.setUserName("李四");
u2.setPassword("222222");
userInfosList.add(u1);
userInfosList.add(u2);
return SUCCESS;
}
public String getMessage() {
return message;
}
public void setMessage(String message) {
this.message = message;
}
public UserInfo getUserInfo() {
return userInfo;
}
public void setUserInfo(UserInfo userInfo) {
this.userInfo = userInfo;
}
public List getUserInfosList() {
return userInfosList;
}
public void setUserInfosList(List userInfosList) {
this.userInfosList = userInfosList;
}
}
import java.util.ArrayList;
import java.util.List;
import com.opensymphony.xwork2.ActionSupport;
public class TestAction extends ActionSupport {
private String message; //使用json返回单个值
private UserInfo userInfo; //使用json返回对象
private List userInfosList; //使用josn返回List对象
/*返回单个值*/
public String returnMsg(){
this.message = "成功返回单个值";
return SUCCESS;
}
/*返回UserInfo对象*/
public String returnUser(){
userInfo = new UserInfo();
userInfo.setUserId(10000);
userInfo.setUserName("刘栋");
userInfo.setPassword("123456");
return SUCCESS;
}
/*返回List对象*/
public String returnList(){
userInfosList = new ArrayList<UserInfo>();
UserInfo u1 = new UserInfo();
u1.setUserId(10000);
u1.setUserName("张三");
u1.setPassword("111111");
UserInfo u2 = new UserInfo();
u2.setUserId(10001);
u2.setUserName("李四");
u2.setPassword("222222");
userInfosList.add(u1);
userInfosList.add(u2);
return SUCCESS;
}
public String getMessage() {
return message;
}
public void setMessage(String message) {
this.message = message;
}
public UserInfo getUserInfo() {
return userInfo;
}
public void setUserInfo(UserInfo userInfo) {
this.userInfo = userInfo;
}
public List getUserInfosList() {
return userInfosList;
}
public void setUserInfosList(List userInfosList) {
this.userInfosList = userInfosList;
}
}
代码
package com.carel.production.presentation;
import java.io.Serializable;
public class UserInfo implements Serializable {
private int userId;
private String userName;
private String password;
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public int getUserId() {
return userId;
}
public void setUserId(int userId) {
this.userId = userId;
}
public String getUserName() {
return userName;
}
public void setUserName(String userName) {
this.userName = userName;
}
}
import java.io.Serializable;
public class UserInfo implements Serializable {
private int userId;
private String userName;
private String password;
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public int getUserId() {
return userId;
}
public void setUserId(int userId) {
this.userId = userId;
}
public String getUserName() {
return userName;
}
public void setUserName(String userName) {
this.userName = userName;
}
}