Struts2+JQuery+JSON实现异步交互,包括从后台获得单个值、对象、List和Map数据并从前台的表达中获取值把值进行序列化通过JQuery的$.ajax({})传到后台和后台的对象进行绑定。
第一步:在MyEclipse中创建JavaWeb工厂并把Struts2 和 json的jar包添加到工程中添加完成后的工程图是:
第二步:创建后台:
1. UserInfo实体类:
- package struts2jsonjquery.test.entity;
-
- import java.io.Serializable;
- /**
- * <p>
- * 用户实体类
- * </p>
- * @author 朱延伟
- *
- */
- public class UserInfo implements Serializable {
-
- private static final long serialVersionUID = 3952189513312630860L;
-
- private int userId;
- private String userName;
- private String 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;
- }
- public String getPassword() {
- return password;
- }
- public void setPassword(String password) {
- this.password = password;
- }
- }
- package struts2jsonjquery.test.entity;
-
- import java.io.Serializable;
- /**
- * <p>
- * 用户实体类
- * </p>
- * @author 朱延伟
- *
- */
- public class UserInfo implements Serializable {
-
- private static final long serialVersionUID = 3952189513312630860L;
-
- private int userId;
- private String userName;
- private String 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;
- }
- public String getPassword() {
- return password;
- }
- public void setPassword(String password) {
- this.password = password;
- }
- }
package struts2jsonjquery.test.entity;
import java.io.Serializable;
/**
* <p>
* 用户实体类
* </p>
* @author 朱延伟
*
*/
public class UserInfo implements Serializable {
private static final long serialVersionUID = 3952189513312630860L;
private int userId;
private String userName;
private String 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;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
}
2. Action类
package struts2jsonjquery.test.action;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import struts2jsonjquery.test.entity.UserInfo;
import com.opensymphony.xwork2.ActionSupport;
public class JsonJqueryStruts2Action extends ActionSupport {
private static final long serialVersionUID = 3518833679938898354L;
private String message; //使用json返回单个值
private UserInfo userInfo; //使用json返回对象
private List<UserInfo> userInfosList; //使用josn返回List对象
private Map<String,UserInfo> userInfosMap; //使用json返回Map对象
//为上面的的属性提供get,Set方法
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<UserInfo> getUserInfosList() {
return userInfosList;
}
public void setUserInfosList(List<UserInfo> userInfosList) {
this.userInfosList = userInfosList;
}
public Map<String, UserInfo> getUserInfosMap() {
return userInfosMap;
}
public void setUserInfosMap(Map<String, UserInfo> userInfosMap) {
this.userInfosMap = userInfosMap;
}
/**
* <p>
* 返回单个值
* <p>
* @return
*/
public String returnMessage(){
this.message = "成功返回单个值";
return "message";
}
/**
* <p>
* 返回UserInfo对象
* </p>
* @return
*/
public String returnUserInfo(){
userInfo = new UserInfo();
userInfo.setUserId(10000);
userInfo.setUserName("张三");
userInfo.setPassword("000000");
return "userInfo";
}
/**
* <p>
* 返回List对象
* </p>
* @return
*/
public String returnList(){
userInfosList = new ArrayList<UserInfo>();
UserInfo u1 = new UserInfo();
u1.setUserId(10000);
u1.setUserName("张三");
u1.setPassword("000000");
UserInfo u2 = new UserInfo();
u2.setUserId(10001);
u2.setUserName("李四");
u2.setPassword("111111");
UserInfo u3 = new UserInfo();
u3.setUserId(10002);
u3.setUserName("王五");
u3.setPassword("222222");
UserInfo u4 = new UserInfo();
u4.setUserId(10003);
u4.setUserName("赵六");
u4.setPassword("333333");
userInfosList.add(u1);
userInfosList.add(u2);
userInfosList.add(u3);
userInfosList.add(u4);
return "list";
}
/**
* <p>
* 返回Map对象
* </p>
* @return
*/
public String returnMap(){
userInfosMap = new HashMap<String,UserInfo>();
UserInfo u1 = new UserInfo();
u1.setUserId(10000);
u1.setUserName("张三");
u1.setPassword("000000");
UserInfo u2 = new UserInfo();
u2.setUserId(10001);
u2.setUserName("李四");
u2.setPassword("111111");
UserInfo u3 = new UserInfo();
u3.setUserId(10002);
u3.setUserName("王五");
u3.setPassword("222222");
UserInfo u4 = new UserInfo();
u4.setUserId(10003);
u4.setUserName("赵六");
u4.setPassword("333333");
userInfosMap.put(u1.getUserId()+"", u1);
userInfosMap.put(u2.getUserId()+"", u2);
userInfosMap.put(u3.getUserId()+"", u3);
userInfosMap.put(u4.getUserId()+"", u4);
return "map";
}
/**
* <p>
* 获得对象,也就是通过表达获得对象(异步的)
* </P>
* @return
*/
public String gainUserInfo(){
System.out.println("用户ID:"+userInfo.getUserId());
System.out.println("用户名:"+userInfo.getUserName());
System.out.println("密码:"+userInfo.getPassword());
return "userInfo";
}
/**
* 获得单个值就不用写了和平常一样
*/
}
3. struts.xml
- <?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>
-
- <package name="default" namespace="/" extends="json-default">
- <action name="jsontest" class="struts2jsonjquery.test.action.JsonJqueryStruts2Action">
- <!-- 返回单个值的result -->
- <result name="message" type="json"></result>
- <!-- 返回UserInfo对象的 -->
- <result name="userInfo" type="json"></result>
- <!-- 返回List对象的 -->
- <result name="list" type="json"></result>
- <!-- 返回Map对象的 -->
- <result name="map" type="json"></result>
- </action>
- </package>
- </struts>
- <?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>
-
- <package name="default" namespace="/" extends="json-default">
- <action name="jsontest" class="struts2jsonjquery.test.action.JsonJqueryStruts2Action">
- <!-- 返回单个值的result -->
- <result name="message" type="json"></result>
- <!-- 返回UserInfo对象的 -->
- <result name="userInfo" type="json"></result>
- <!-- 返回List对象的 -->
- <result name="list" type="json"></result>
- <!-- 返回Map对象的 -->
- <result name="map" type="json"></result>
- </action>
- </package>
- </struts>
<?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>
<package name="default" namespace="/" extends="json-default">
<action name="jsontest" class="struts2jsonjquery.test.action.JsonJqueryStruts2Action">
<!-- 返回单个值的result -->
<result name="message" type="json"></result>
<!-- 返回UserInfo对象的 -->
<result name="userInfo" type="json"></result>
<!-- 返回List对象的 -->
<result name="list" type="json"></result>
<!-- 返回Map对象的 -->
<result name="map" type="json"></result>
</action>
</package>
</struts>
前台:
1. index.jsp
- <%@ page language="java" pageEncoding="GBK"%>
- <%
- String path = request.getContextPath();
- %>
-
- <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
- <html>
- <head>
-
- <title>Struts2+JQuery+JSON</title>
- <meta http-equiv="pragma" content="no-cache">
- <meta http-equiv="cache-control" content="no-cache">
- <meta http-equiv="expires" content="0">
- <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
- <meta http-equiv="description" content="This is my page">
- <script type="text/javascript" src="<%=path %>/js/jquery.js"></script>
- <script type="text/javascript" src="<%=path %>/js/json.js"></script>
- </head>
-
- <body>
- <input id="getMessage" type="button" value="获取单个值"/>
- <input id="getUserInfo" type="button" value="获取UserInfo对象"/>
- <input id="getList" type="button" value="获取List对象"/>
- <input id="getMap" type="button" value="获取Map对象"/>
- <br>
- <br>
- <br>
-
- <div id="message"></div>
- <form>
- 用户ID:<input name="userInfo.userId" type="text"/><br/>
- 用户名:<input name="userInfo.userName" type="text"/><br/>
- 密 码:<input name="userInfo.password" type="text"/><br>
- <input id="regRe" type="button" value="注册"/>
- </form>
- </body>
- </html>
- <%@ page language="java" pageEncoding="GBK"%>
- <%
- String path = request.getContextPath();
- %>
-
- <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
- <html>
- <head>
-
- <title>Struts2+JQuery+JSON</title>
- <meta http-equiv="pragma" content="no-cache">
- <meta http-equiv="cache-control" content="no-cache">
- <meta http-equiv="expires" content="0">
- <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
- <meta http-equiv="description" content="This is my page">
- <script type="text/javascript" src="<%=path %>/js/jquery.js"></script>
- <script type="text/javascript" src="<%=path %>/js/json.js"></script>
- </head>
-
- <body>
- <input id="getMessage" type="button" value="获取单个值"/>
- <input id="getUserInfo" type="button" value="获取UserInfo对象"/>
- <input id="getList" type="button" value="获取List对象"/>
- <input id="getMap" type="button" value="获取Map对象"/>
- <br>
- <br>
- <br>
-
- <div id="message"></div>
- <form>
- 用户ID:<input name="userInfo.userId" type="text"/><br/>
- 用户名:<input name="userInfo.userName" type="text"/><br/>
- 密 码:<input name="userInfo.password" type="text"/><br>
- <input id="regRe" type="button" value="注册"/>
- </form>
- </body>
- </html>
<%@ page language="java" pageEncoding="GBK"%>
<%
String path = request.getContextPath();
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>Struts2+JQuery+JSON</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<script type="text/javascript" src="<%=path %>/js/jquery.js"></script>
<script type="text/javascript" src="<%=path %>/js/json.js"></script>
</head>
<body>
<input id="getMessage" type="button" value="获取单个值"/>
<input id="getUserInfo" type="button" value="获取UserInfo对象"/>
<input id="getList" type="button" value="获取List对象"/>
<input id="getMap" type="button" value="获取Map对象"/>
<br>
<br>
<br>
<!-- 要显示信息的层 -->
<div id="message"></div>
<form>
用户ID:<input name="userInfo.userId" type="text"/><br/>
用户名:<input name="userInfo.userName" type="text"/><br/>
密 码:<input name="userInfo.password" type="text"/><br>
<input id="regRe" type="button" value="注册"/>
</form>
</body>
</html>
2. json.js
-
- $(document).ready(function(){
-
- $("#getMessage").click(function(){
- $.getJSON("jsontest!returnMessage.action",function(data){
-
- $("#message").html("<font color='red'>"+data.message+"</font>");
- });
- });
-
- $("#getUserInfo").click(function(){
- $.getJSON("jsontest!returnUserInfo.action",function(data){
-
- $("#message").html("");
-
-
- $("#message").append("<div><font color='red'>用户ID:"+data.userInfo.userId+"</font></div>")
- .append("<div><font color='red'>用户名:"+data.userInfo.userName+"</font></div>")
- .append("<div><font color='red'>密码:"+data.userInfo.password+"</font></div>")
- });
- });
-
- $("#getList").click(function(){
- $.getJSON("jsontest!returnList.action",function(data){
-
- $("#message").html("");
-
-
- $.each(data.userInfosList,function(i,value){
- $("#message").append("<div>第"+(i+1)+"个用户:</div>")
- .append("<div><font color='red'>用户ID:"+value.userId+"</font></div>")
- .append("<div><font color='red'>用户名:"+value.userName+"</font></div>")
- .append("<div><font color='red'>密码:"+value.password+"</font></div>");
- });
- });
- });
-
- $("#getMap").click(function(){
- $.getJSON("jsontest!returnMap.action",function(data){
-
- $("#message").html("");
-
-
-
- $.each(data.userInfosMap,function(key,value){
- $("#message").append("<div><font color='red'>用户ID:"+value.userId+"</font></div>")
- .append("<div><font color='red'>用户名:"+value.userName+"</font></div>")
- .append("<div><font color='red'>密码:"+value.password+"</font></div>");
- });
- });
- });
-
- $("#regRe").click(function(){
-
- var params = $("form").serialize();
-
- $.ajax({
- url:"jsontest!gainUserInfo.action",
- type:"POST",
- data:params,
- dataType:"json",
- success:function(data){
-
- $("#message").html("");
-
-
- $("#message").append("<div><font color='red'>用户ID:"+data.userInfo.userId+"</font></div>")
- .append("<div><font color='red'>用户名:"+data.userInfo.userName+"</font></div>")
- .append("<div><font color='red'>密码:"+data.userInfo.password+"</font></div>")
- }
- });
- });
- });
-
- $(document).ready(function(){
-
- $("#getMessage").click(function(){
- $.getJSON("jsontest!returnMessage.action",function(data){
-
- $("#message").html("<font color='red'>"+data.message+"</font>");
- });
- });
-
- $("#getUserInfo").click(function(){
- $.getJSON("jsontest!returnUserInfo.action",function(data){
-
- $("#message").html("");
-
-
- $("#message").append("<div><font color='red'>用户ID:"+data.userInfo.userId+"</font></div>")
- .append("<div><font color='red'>用户名:"+data.userInfo.userName+"</font></div>")
- .append("<div><font color='red'>密码:"+data.userInfo.password+"</font></div>")
- });
- });
-
- $("#getList").click(function(){
- $.getJSON("jsontest!returnList.action",function(data){
-
- $("#message").html("");
-
-
- $.each(data.userInfosList,function(i,value){
- $("#message").append("<div>第"+(i+1)+"个用户:</div>")
- .append("<div><font color='red'>用户ID:"+value.userId+"</font></div>")
- .append("<div><font color='red'>用户名:"+value.userName+"</font></div>")
- .append("<div><font color='red'>密码:"+value.password+"</font></div>");
- });
- });
- });
-
- $("#getMap").click(function(){
- $.getJSON("jsontest!returnMap.action",function(data){
-
- $("#message").html("");
-
-
-
- $.each(data.userInfosMap,function(key,value){
- $("#message").append("<div><font color='red'>用户ID:"+value.userId+"</font></div>")
- .append("<div><font color='red'>用户名:"+value.userName+"</font></div>")
- .append("<div><font color='red'>密码:"+value.password+"</font></div>");
- });
- });
- });
-
- $("#regRe").click(function(){
-
- var params = $("form").serialize();
-
- $.ajax({
- url:"jsontest!gainUserInfo.action",
- type:"POST",
- data:params,
- dataType:"json",
- success:function(data){
-
- $("#message").html("");
-
-
- $("#message").append("<div><font color='red'>用户ID:"+data.userInfo.userId+"</font></div>")
- .append("<div><font color='red'>用户名:"+data.userInfo.userName+"</font></div>")
- .append("<div><font color='red'>密码:"+data.userInfo.password+"</font></div>")
- }
- });
- });
- });
//初始加载页面时
$(document).ready(function(){
//为获取单个值的按钮注册鼠标单击事件
$("#getMessage").click(function(){
$.getJSON("jsontest!returnMessage.action",function(data){
//通过.操作符可以从data.message中获得Action中message的值
$("#message").html("<font color='red'>"+data.message+"</font>");
});
});
//为获取UserInfo对象按钮添加鼠标单击事件
$("#getUserInfo").click(function(){
$.getJSON("jsontest!returnUserInfo.action",function(data){
//清空显示层中的数据
$("#message").html("");
//为显示层添加获取到的数据
//获取对象的数据用data.userInfo.属性
$("#message").append("<div><font color='red'>用户ID:"+data.userInfo.userId+"</font></div>")
.append("<div><font color='red'>用户名:"+data.userInfo.userName+"</font></div>")
.append("<div><font color='red'>密码:"+data.userInfo.password+"</font></div>")
});
});
//为获取List对象按钮添加鼠标单击事件
$("#getList").click(function(){
$.getJSON("jsontest!returnList.action",function(data){
//清空显示层中的数据
$("#message").html("");
//使用jQuery中的each(data,function(){});函数
//从data.userInfosList获取UserInfo对象放入value之中
$.each(data.userInfosList,function(i,value){
$("#message").append("<div>第"+(i+1)+"个用户:</div>")
.append("<div><font color='red'>用户ID:"+value.userId+"</font></div>")
.append("<div><font color='red'>用户名:"+value.userName+"</font></div>")
.append("<div><font color='red'>密码:"+value.password+"</font></div>");
});
});
});
//为获取Map对象按钮添加鼠标单击事件
$("#getMap").click(function(){
$.getJSON("jsontest!returnMap.action",function(data){
//清空显示层中的数据
$("#message").html("");
//使用jQuery中的each(data,function(){});函数
//从data.userInfosList获取UserInfo对象放入value之中
//key值为Map的键值
$.each(data.userInfosMap,function(key,value){
$("#message").append("<div><font color='red'>用户ID:"+value.userId+"</font></div>")
.append("<div><font color='red'>用户名:"+value.userName+"</font></div>")
.append("<div><font color='red'>密码:"+value.password+"</font></div>");
});
});
});
//向服务器发送表达数据
$("#regRe").click(function(){
//把表单的数据进行序列化
var params = $("form").serialize();
//使用jQuery中的$.ajax({});Ajax方法
$.ajax({
url:"jsontest!gainUserInfo.action",
type:"POST",
data:params,
dataType:"json",
success:function(data){
//清空显示层中的数据
$("#message").html("");
//为显示层添加获取到的数据
//获取对象的数据用data.userInfo.属性
$("#message").append("<div><font color='red'>用户ID:"+data.userInfo.userId+"</font></div>")
.append("<div><font color='red'>用户名:"+data.userInfo.userName+"</font></div>")
.append("<div><font color='red'>密码:"+data.userInfo.password+"</font></div>")
}
});
});
});
注意:JSON插件会把所有包含getter方法的属性都序列化到返回结果中,所以Action中的其他execute方法都不要把名
字加get前缀。
可以下载工程文件