Struts2 json plugin实战2
jopen
13年前
<p>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</p> <p> </p> <p></p> <pre class="brush:xml; toolbar: true; auto-links: false;"> <dependency> <groupId>org.apache.struts</groupId> <artifactId>struts2-json-plugin</artifactId> <version>2.1.8.1</version> </dependency></pre> <p></p> <p> </p> <p> </p> <p>2. 创建Action类和一个用到的User类</p> <p>Action类内容</p> <p></p> <pre class="brush:java; toolbar: true; auto-links: false;">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; } }</pre> <p></p> <p> </p> <p> </p> <p>User类内容</p> <p></p> <pre class="brush:java; toolbar: true; auto-links: false;">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; } }</pre> <p></p> <p> </p> <p>3. Spring配置文件</p> <p></p> <pre class="brush:java; toolbar: true; auto-links: false;"><?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></pre> <p></p> <p> </p> <p>4. Struts2配置文件</p> <p></p> <pre class="brush:java; toolbar: true; auto-links: false;"><?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></pre> <p></p> <p> </p> <p>5. 新建一个jsp文件json.jsp用来做测试</p> <p></p> <pre class="brush:xml; toolbar: true; auto-links: false;"><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></pre> <p></p> <p> </p> <p> </p> <p>6. 启动web容器测试,可以使用Tomcat或者maven自带的jetty,然后访问</p> <p> http://localhost:8080/json/json.jsp</p> <p> 此时可以点击页面上的两个链接来测试结果。</p> <p> </p> <p>参考:https://cwiki.apache.org/confluence/display/WW/JSON%20Plugin</p> <p> </p>