DWR整合Spring之小例子

1.在web.xml配置dwr

<!--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>  

2.增加dwr.xml文件

<?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>  

3.Java类POJO

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;    
 }    
} 

 
4.spring中配置applicationContext.xml

......    
 <bean id="DWRUser" class="com.note.dwr.User">   
  <property name="ius">   
   <ref bean="UserService" />   
  </property>   
 </bean>   
...... 

5.jsp页面调用

<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>  
<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>   
input type="text" name="username" value="" onblur="regUserChked()" /><div id="userMsg"></div>