浅谈struts2、jquery与json的集成

struts2、jquery与json的集成是怎样实现异步交互的，下面我们来做个综合的小案例。
做案例的前提是：先要引入必要的jar包。

比如：

1、struts2-core-2.x.x.x.jar :Struts 2框架的核心类库
2、xwork-2.x.x.jar :XWork类库，Struts 2在其上构建
3、ognl-2.x.x.jar :对象图导航语言（Object Graph Navigation Language），struts2框架通过其读写对象的属性
4、freemarker-2.3.x.jar :Struts 2的UI标签的模板使用FreeMarker编写
5、commons-logging-1.1.x.jar :ASF出品的日志包，Struts 2框架使用这个日志包来支持Log4J和JDK 1.4+的日志记录。
6、commons-fileupload-1.2.1.jar 文件上传组件，2.1.6版本后必须加入此文件
7、struts2-json-plugin.jar struts2与json的插件

cn.z_xiaofei168.domain包

001package cn.z_xiaofei168.domain; 
002  
003import java.io.Serializable; 
004import java.util.Date; 
005  
006public class User implements Serializable { 
007  
008/** 
009* @author z_xiaofei168 
010*/
011private static final long serialVersionUID = 1L; 
012  
013/** 用户的编号 */
014private Integer id; 
015/** 用户的名称 */
016private String name; 
017/** 用户的密码 */
018private String pass; 
019/** 用户的邮箱 */
020private String email; 
021/** 用户的注册日期 */
022private Date rdate; 
023  
024public User() { 
025super(); 
026} 
027  
028//以下省略所以的set和get方法 
029} 
030  
031  
032  
033cn.z_xiaofei168.action包 
034  
035  
036Java代码 
037package cn.z_xiaofei168.action; 
038  
039import java.util.List; 
040  
041import cn.z_xiaofei168.dao.Pagination; 
042import cn.z_xiaofei168.domain.User; 
043import cn.z_xiaofei168.service.UserServiceImpl; 
044  
045import com.opensymphony.xwork2.ActionSupport; 
046  
047public class UserAction extends ActionSupport { 
048  
049/** 
050* @author z_xiaofei168 
051*/
052private static final long serialVersionUID = 1L; 
053  
054/** 业务层对象 */
055private UserServiceImpl userServiceImpl; 
056private List<User> list; 
057  
058public UserServiceImpl getUserServiceImpl() { 
059return userServiceImpl; 
060} 
061  
062/** set方法注入 */
063public void setUserServiceImpl(UserServiceImpl userServiceImpl) { 
064this.userServiceImpl = userServiceImpl; 
065} 
066  
067public List<User> getList() { 
068return list; 
069} 
070  
071public void setList(List<User> list) { 
072this.list = list; 
073} 
074  
075/** 模糊查新的方法 */
076public String findByDarkName() throws Exception{ 
077list = userServiceImpl.findByDarkName(user.getName()); 
078return "findByDarkName"; 
079} 
080} 
081  
082  
083  
084cn.z_xiaofei168.dao包 
085  
086  
087  
088Java代码 
089package cn.z_xiaofei168.dao; 
090  
091import java.util.List; 
092  
093import cn.z_xiaofei168.domain.User; 
094  
095public interface UserDao { 
096  
097public List<User> findByDarkName(String name) throws Exception; 
098} 
099  
100  
101  
102  
103Java代码 
104package cn.z_xiaofei168.dao; 
105  
106import java.util.List; 
107  
108import org.springframework.orm.hibernate3.support.HibernateDaoSupport; 
109  
110import cn.z_xiaofei168.domain.User; 
111  
112public class UserDaoImpl extends HibernateDaoSupport implements UserDao { 
113  
114@SuppressWarnings("unchecked") 
115public List<User> findByDarkName(String name) throws Exception { 
116  
117List list = this.getHibernateTemplate().find("from User where name like ?","%"+name+"%"); 
118System.out.println("findByDarkName模糊："+list.size()); 
119return list; 
120} 
121  
122} 
123  
124  
125cn.z_xiaofei168.service包 
126  
127  
128  
129Java代码 
130package cn.z_xiaofei168.service; 
131  
132import cn.z_xiaofei168.dao.UserDao; 
133  
134public interface UserService extends UserDao { 
135  
136} 
137  
138  
139  
140Java代码 
141package cn.z_xiaofei168.service; 
142  
143import java.util.List; 
144  
145import cn.z_xiaofei168.dao.UserDaoImpl; 
146import cn.z_xiaofei168.domain.User; 
147  
148public class UserServiceImpl implements UserService { 
149  
150private UserDaoImpl userDaoImpl; 
151  
152public UserDaoImpl getUserDaoImpl() { 
153return userDaoImpl; 
154} 
155  
156/** set方法进行注入 */
157public void setUserDaoImpl(UserDaoImpl userDaoImpl) { 
158this.userDaoImpl = userDaoImpl; 
159} 
160  
161public List<User> findByDarkName(String name) throws Exception { 
162return userDaoImpl.findByDarkName(name); 
163} 
164  
165}

struts.xml

01<?xml version="1.0" encoding="UTF-8" ?> 
02<!DOCTYPE struts PUBLIC 
03"-//Apache Software Foundation//DTD Struts Configuration 2.1.7//EN" 
04"http://struts.apache.org/dtds/struts-2.1.7.dtd"> 
05<struts> 
06<package name="z_xiaofei" extends="json-default" namespace="/csdn"> 
07<global-results> 
08<result name="input">/index.jsp</result> 
09</global-results> 
10  
11<action name="user_*" class="cn.z_xiaofei168.action.UserAction" method="{1}"> 
12  
13<!-- 返回的是一个user对象 user对象(id,name,pass) -->
14<result name="findByDarkName" type="json"> 
15<!-- param参数的配置,includeProperties -->
16<param name="includeProperties"> 
17list\[\d+\]\.id, list\[\d+\]\.name, list\[\d+\]\.pass 
18</param> 
19</result> 
20</action> 
21</package> 
22</struts>

jsp页面

01<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%> 
02<% 
03String path = request.getContextPath(); 
04String basePath = request.getScheme() + "://" 
05+ request.getServerName() + ":" + request.getServerPort() 
06+ path + "/"; 
07%> 
08  
09<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 
10<html> 
11<head> 
12<base href="<%=basePath%>"> 
13  
14<title>用户信息输入</title> 
15  
16<meta http-equiv="pragma" content="no-cache"> 
17<meta http-equiv="cache-control" content="no-cache"> 
18<meta http-equiv="expires" content="0"> 
19<meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> 
20<meta http-equiv="description" content="This is my page"> 
21<!-- 
22<link rel="stylesheet" type="text/css" href="styles.css"> 
23-->
24<script type="text/javascript"
25src="${pageContext.request.contextPath}/js/jquery-1.6.js"> 
26</script> 
27<script type="text/javascript"> 
28  
29function findByDarkName() { 
30var name = $("#darkName").val(); 
31$.ajax({ 
32type:"post", 
33url:"csdn/user_findByDarkName", 
34data:"user.name="+name, 
35dataType:"json", 
36success:function(data){ 
37$.each(data.list,function(i,entity){ 
38$("#darklist").append("<tr style='border:1px'></tr>") 
39.append("<td>"+entity.id+"</td>") 
40.append("<td>"+entity.name+"</td>") 
41.append("<td>"+entity.pass+"</td>"); 
42}); 
43} 
44}); 
45} 
46</script> 
47</head> 
48  
49<body> 
50<br /> 
51<div> 
52<h2> 
53<font color="red">模糊查询</font> 
54</h2> 
55<br /> 
56<h3>

模糊性:在给出的信息中，与之有相同的元素即可

01</h3> 
02<br /> 
03<input type="text" id="darkName" name="user.name" /> 
04<span id="msg"></span> 
05<input type="button" value="模糊查询" onclick="findByDarkName()" /> 
06</div> 
07  
08<table> 
09<thead> 
10<tr> 
11<th>序号</th> 
12<th>名称</th> 
13<th>密码</th> 
14<th>注册日期</th> 
15<th>操作</th> 
16</tr> 
17</thead> 
18<tbody id="darklist"> 
19</tbody> 
20</table> 
21</body> 
22</html>

struts配置文件里有个type=json 并且文件继承了json-default,该文件在struts2-jon-plugin.jar里面定义了.里边定义了一个interceptor,会将action中提供了get set方法的属性封装成json格式数据response给客户端,

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