DWR+SPRING整合

1、将dwr.jar放到应用的/WEB-INF/lib目录下

2、配置web.xml,增加如下代码:

Java代码 

<!--初始化WebApplicationContext-->   
 <context-param>   
        <param-name>contextConfigLocation</param-name>   
        <param-value>/WEB-INF/applicationContext.xml,/WEB-INF/action-servlet.xml</param-value>   
 </context-param>   
 <listener>   
       <listener-class>   
             org.springframework.web.context.ContextLoaderListener   
       </listener-class>   
 </listener>   
<!--配置DWR拦截器-->   
 <servlet>   
  <servlet-name>dwr-invoker</servlet-name>   
  <servlet-class>uk.ltd.getahead.dwr.DWRServlet</servlet-class>   
  <init-param>   
   <param-name>debug</param-name>   
   <param-value>true</param-value>   
  </init-param>   
 </servlet>   
 <servlet-mapping>   
  <servlet-name>dwr-invoker</servlet-name>   
  <url-pattern>/dwr/*</url-pattern>   
 </servlet-mapping> 
3、增中dwr.xml文件

文件内容：

Java代码 

<?xml version="1.0" encoding="UTF-8"?>   
<!DOCTYPE dwr PUBLIC "-//GetAhead Limited//DTD Direct Web Remoting 1.0//EN" "http://www.getahead.ltd.uk/dwr/dwr10.dtd">   
<dwr>   
 <allow>   
  <create creator="spring" javascript="DWRUser">   
   <param name="beanName" value="DWRUser"/>   
  </create>   
 </allow>   
</dwr>  
creator属性的值可以是new,struts,spring......因为此处是整合spring来做的，所以设置成“spring”，javascript="DWRUser" 表示实例转换成javascript语言后以DWRUser命名，前台页面可以通过代码（<script type='text/javascript' src='../../dwr/interface/DWRUser.js'></script>）来调用。param元素的name属性值可以是class,beanName等，此处用beanName,value得值是定义在applicationContext.xml中某个bean的id值。

4、创建一个实体bean供DWR转换成js

Java代码 

package com.note.dwr;   
import com.note.bussies.service.IUserService;   
public class User {   
 private IUserService ius;   
    
 public IUserService getIus() {   
  return ius;   
 }   
 public void setIus(IUserService ius) {   
  this.ius = ius;   
 }   
 public User(){   
     
 }   
 public boolean isExist(String username) {   
      Users user = this.ius.getUserByName(username);   
      return (null == user) ? false : true;   
 }   
}  
5、在applicationContext.xml中配置第4步写的bean

Java代码 

......   
 <bean id="DWRUser" class="com.note.dwr.User">   
  <property name="ius">   
   <ref bean="UserService" />   
  </property>   
 </bean>   
......  
6、在视图页面中调用

先导入以下文，每个文件的功能这里不再详述

Java代码 

<script type='text/javascript' src='../../dwr/interface/DWRUser.js'></script>   
<script type='text/javascript' src='../../dwr/engine.js'></script>   
<script type='text/javascript' src='../../dwr/util.js'></script>  
因为我的视图文件是放在/view/user/下，所以这里用了../../返回到根

具体调用：

Java代码 

<script type='text/javascript'>   
 function regUserChked(){   
  var username=$("username").value;   
  DWRUser.isExist(username,showData);//showData回调函数   
 }   
 function showData(data){   
     if(data){   
          DWRUtil.setValue("userMsg","该用户名已经被注册，请更换您的用户名！");   
     }else{   
          DWRUtil.setValue("userMsg","恭喜您，该用户名尚未被注册！");         
     }   
 }   
</script>   
lt;input type="text" name="username" value="" onblur="regUserChked()" /><div id="userMsg"></div>