2007-12-21

Spring和dwr的集成入门实例

首先配置web.xml

 

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.4" 
    xmlns="http://java.sun.com/xml/ns/j2ee" 
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
    xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee 
    http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
    <context-param>
     <param-name>contextConfigLocation</param-name>
     <param-value>/WEB-INF/applicationContext.xml</param-value>
    </context-param>
    <listener>
      <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>
    <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>
       <!-- dwr2.0使用了annotation,不配置这个参数会出现异常（但不影响程序功能） -->
       <init-param > 
            <param-name > classes </param-name > 
            <param-value > java.lang.Object </param-value > 
       </init-param > 
       
    </servlet>
    <servlet-mapping>
      <servlet-name>dwr-invoker</servlet-name>
      <url-pattern>/dwr/*</url-pattern>
    </servlet-mapping>
</web-app>

 

Spring配置文件：

 

<?xml version="1.0" encoding="UTF-8"?>
<beans
    xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd">

<bean id="loginService" class="springdwr.LoginService"/>
</beans>

 

LoginService.java

 

package springdwr;

public class LoginService {
   public String login(String name){
       return "hello:"+name;
   }
}

 

dwr配置文件

 

<!DOCTYPE dwr PUBLIC
    "-//GetAhead Limited//DTD Direct Web Remoting 1.0//EN"
    "http://www.getahead.ltd.uk/dwr/dwr11.dtd">
<dwr>
 <allow>
    
    <!-- 配置和spring的集成，本文的重点 -->
    <create javascript="loginService" creator="spring">
      <param name="beanName" value="loginService"/>
    </create>
 </allow>
 
 
</dwr>

 

测试jsp:

 

<%@ page language="java" contentType="text/html; charset=gb2312"
    pageEncoding="gb2312"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<script type='text/javascript' src='/DWRStudy/dwr/interface/loginService.js'></script>
<script type='text/javascript' src='/DWRStudy/dwr/engine.js'></script>
<script type='text/javascript' src='/DWRStudy/dwr/util.js'></script>


<script type="text/javascript">
  function aaa() {
    var name=document.getElementById("name").value;
    loginService.login(name,showResult);
  }
  function showResult(data){
    var root=${"loginResult"};
    var str=data;
    root.innerHTML=str;
  }

  
</script>
<title>Insert title here</title>
</head>

<body>
<form name="form1" method="post" action="">
  <table width="400" border="0" cellpadding="0">
    <tr>
      <td height="25">
      姓名：<input name="name" type="text" id="name">&nbsp;
      <input name="login" type="button" id="login" value="登陆" onClick="aaa();">&nbsp;<br>    
      <span id="loginResult"></span>
      </td>
    </tr>
  </table>
</form>
</body>
</html>

 

输入姓名world 提交后，不刷新页面，在loginResult的位置现实hello world

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