Struts2使用jquery ajax返回json数据

雨点打透心脏的1/2处 2022-07-12 10:40 200阅读 0赞

操作步骤：  
1.配置web.xml  
2.创建Action  
3.配置struts.xml  
4.创建页面(jsp/html)  
5.引入jquery&测试

关于使用Struts2操作json需要导入的jar(不包含Struts2核心jar)：  
commons-beanutils-1.8.0.jar  
commons-collections-3.2.2.jar  
commons-lang-2.4.jar  
commons-logging-1.2.jar  
ezmorph-1.0.6.jar  
json-lib-2.3-jdk15.jar  
struts2-json-plugin-2.3.31.jar  
**注意:commons-lang-xx.jar不同于 commons-lang3-xx.jar**

1.配置web.xml  
web.xml:

<?xml version="1.0" encoding="UTF-8"?>
    <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">
      <display-name>CampusStore</display-name>
      <welcome-file-list>
        <welcome-file>homepage.jsp</welcome-file>
      </welcome-file-list>
      <filter>
        <filter-name>struts2</filter-name>
        <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
      </filter>
      <filter-mapping>
        <filter-name>struts2</filter-name>
        <url-pattern>/*</url-pattern>
      </filter-mapping>
    </web-app>

2.创建Action  
ActionTest.java:

package com.cs.demo.action;
    import java.util.HashMap;
    import java.util.Map;
    import com.opensymphony.xwork2.ActionSupport;
    import net.sf.json.JSONObject;
    /** * @author lucien * */
    public class ActionTest extends ActionSupport{ 
        private static final boolean DBG = true;
    
        private String result;
        private String account;
        private String passcode;
    
        public String ajaxTest() throws Exception {
            try {
                if(DBG){System.out.println("Account:" + account + ",passcode:" +passcode);}
    // Map存放数据
                Map<String, String> map = new HashMap<String,String>();
                map.put("account",account);
                map.put("passcode", passcode);
    // 转换为json数据
                JSONObject json = JSONObject.fromObject(map);
    // json转String
                result = json.toString();
                if(DBG){System.out.println("result: " + result);}
            } catch (Exception e) {
                // TODO: handle exception
            }
    
            return SUCCESS;
        }
    
        /** * 此处省略 set get 方法 */
    }

3.配置struts.xml  
struts.xml:

<?xml version="1.0" encoding="UTF-8" ?>
    <!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN" "http://struts.apache.org/dtds/struts-2.3.dtd">
    
    <struts>
        
        <constant name="struts.devMode" value="true" />
        
        <constant name="struts.i18n.encoding" value="utf-8"/>
        
        <package name="test" namespace="/test" extends="struts-default,json-default">
            <action name="ajaxTest" class="com.cs.demo.action.ActionTest" method="ajaxTest">
                <result type="json">
                    <param name="root">result</param>
                </result>   
            </action>
        </package>
    </struts>

4.创建页面(jsp/html)  
5.引入jquery&测试  
ajaxTest.jsp:

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
    <% String path = request.getContextPath(); String basePath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort() + path + "/"; %>
    <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
    <html>
    <head>
    <base href="<%=basePath%>"/>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    <script type="text/javascript" src="js/jquery-1.11.3.js"></script>
    <title>Insert title here</title>
    </head>
    <body>
        <form action="test/ajaxTest" method="post">
            姓名:<input type="text" id="account" name="account"/>
            密码:<input type="password" id="passcode" name="passcode"/>
            <input type="submit" value="提交"/>
        </form>
    </body>
    <script type="text/javascript"> $(document).ready(function() { alert("ajaxTest!"); $("form").submit(function() { alert("ajaxTest!"); var form = $(this); $.ajax({ type: form.attr('method'), url: "test/ajaxTest", data:{ account: $("input[name=account]").val(), passcode: $("input[name=passcode]").val() }, dataType: "json", cache: false, success: function(data){ alert("Success!"); alert(data); }, error: function(){ alert("Network Error..." ); } }); }); }); </script>
    </html>

项目运行截图：  
![这里写图片描述][SouthEast]  
![这里写图片描述][SouthEast 1]

[SouthEast]: /images/20220710/492f7625f480457180f872e8918757c3.png
[SouthEast 1]: /images/20220710/7699f8a60f854387a03968a58e20b356.png