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Struts2 json plugin实战2

2010-07-29 08:50 183 查看

1. 首先是在struts2的工程里添加struts2-json-plugin.xxx.jar库，如果是使用的maven，添加以下dependency

<dependency>
<groupId>org.apache.struts</groupId>
<artifactId>struts2-json-plugin</artifactId>
<version>2.1.8.1</version>
</dependency>

2. 创建Action类和一个用到的User类

Action类内容

import com.opensymphony.xwork2.Action;
import java.util.ArrayList;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
public class JSONExample2 {
private List<User> userList = new ArrayList<User>();
private Map<String, User> userMap = new LinkedHashMap<String, User>();
public String getMyUserList() {
for (int i = 0; i < 3; i++) {
User user = new User("id_" + i, "username_" + i, "password_" + i, "desc_" + i);
userList.add(user);
}
return Action.SUCCESS;
}
public String getMyUserMap() {
for (int i = 0; i < 3; i++) {
User user = new User("id_" + i, "username_" + i, "password_" + i, "desc_" + i);
userMap.put(user.getId(), user);
}
return Action.SUCCESS;
}
public List<User> getUserList() {
return userList;
}
public void setUserList(List<User> userList) {
this.userList = userList;
}
public Map<String, User> getUserMap() {
return userMap;
}
public void setUserMap(Map<String, User> userMap) {
this.userMap = userMap;
}
}

User类内容

import java.io.Serializable;
public class User implements Serializable {
private static final long serialVersionUID = 1L;

private String id;
private String username;
private String password;
private String description;

public User() {
}
public User(String id, String username, String password, String description) {
this.id = id;
this.username = username;
this.password = password;
this.description = description;
}

public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
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;
}

public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
}

3. Spring配置文件

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:lang="http://www.springframework.org/schema/lang"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.0.xsd http://www.springframework.org/schema/lang http://www.springframework.org/schema/lang/spring-lang-2.0.xsd" default-lazy-init="true">
<bean id="jsonExample2" class="JSONExample2" scope="prototype"/>
</beans>

4. Struts2配置文件

<?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>

<include file="struts-default.xml" />
<package name="json" namespace="/json" extends="struts-default" >

<result-types>
<result-type name="json" class="org.apache.struts2.json.JSONResult"/>
</result-types>

<interceptors>
<interceptor name="json" class="org.apache.struts2.json.JSONInterceptor"/>
</interceptors>
<action name="getMyUserList" class="jsonExample2" method="getMyUserList">
<result type="json">
<param name="root">userList</param>
</result>
</action>
<action name="getMyUserMap" class="jsonExample2" method="getMyUserMap">
<result type="json">
<param name="root">userMap</param>
</result>
</action>
</package>
</struts>

5. 新建一个jsp文件json.jsp用来做测试

<html>
<head>
<title></title>
<mce:script type="text/javascript" src="http://www.google.com/jsapi?key=helloworld" mce_src="http://www.google.com/jsapi?key=helloworld"></mce:script>
<mce:script type="text/javascript"><!--
google.load("jquery", "1.4.1");

function getMyUserList() {
var url = 'json/getMyUserList.action';
var params = {
};
jQuery.post(url, params, function(data) {
var s = "";
for (var idx = 0; idx < data.length; idx++) {
s += "user["+idx+"].id=" + data[idx].id + "/n";
}
alert(s);
}, 'json');
}
function getMyUserMap() {
var url = 'json/getMyUserMap.action';
var params = {
};
jQuery.post(url, params, function(data) {
var s = "";
for (var o in data) {
s += "user.id=" + data[o].id + ",";
s += "user.username=" + data[o].username + "/n";
}
alert(s);
}, 'json');
}

// --></mce:script>
</head>
<body style="margin: 20px;" mce_style="margin: 20px;">
<h3>json test</h3>
<ul>
<li><a href="#" mce_href="#" onclick="getMyUserList()">getMyUserList</a></li>
<li><a href="#" mce_href="#" onclick="getMyUserMap()">getMyUserMap</a></li>
</ul>
</body>
</html>

6. 启动web容器测试，可以使用Tomcat或者maven自带的jetty，然后访问
http://localhost:8080/json/json.jsp
此时可以点击页面上的两个链接来测试结果。

参考：https://cwiki.apache.org/confluence/display/WW/JSON%20Plugin

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