DWR学习——基础配置

一下分别是dwr的四个文件内容

1.jsp页面内容

<html>
  <head>
    <title>First DWR</title>
<!--    这里的interface是固定的，DWRDemo是java类地名字，原理处会详细说-->
    <script type="text/javascript" src="dwr/interface/DWRDemo.js"></script>
    <script type="text/javascript" src="dwr/engine.js"></script>
    <script type="text/javascript">
    
        window.onload=init;
        function init(){
         //这个是类.方法(实参,回调函数)
            DWRDemo.say("Coder",callBackHandler);
            
        }
        //回调函数的写法,date为java方法返回来的值，可以起任何名字
        var callBackHandler=function(date){
            alert(date);
        };
    
    </script>
  </head>
</html>

2.web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.0" 
    xmlns="http://java.sun.com/xml/ns/javaee" 
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 
    http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">

<!-- dwr servlet-->
  <!-- The DWR servlet. -->
  <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>
    <init-param>
      <param-name>crossDomainSessionSecurity</param-name>
      <param-value>false</param-value>
   </init-param>
  </servlet>
  <servlet-mapping>
    <servlet-name>dwr-invoker</servlet-name>
    <url-pattern>/dwr/*</url-pattern>
  </servlet-mapping>


  <!-- Default page to load in context. -->
  <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
  </welcome-file-list>


</web-app>

3 后端的java

package ml;

public class DWRDemo {
    public String say(String name){
        return name+"测试成功";
    }
}

以及dwr.xml的配置

<?xml version="1.0" encoding="UTF-8"?>

<!--有必要把这个也复制进去-->
<!DOCTYPE dwr PUBLIC "-//GetAhead Limited//DTD Direct Web Remoting 2.0//EN"
  "http://getahead.org/dwr/dwr20.dtd">


<dwr>
  <allow>
    <create creator="new" javascript="MathDelegate">
      <param name="class" value="app.MathDelegate" />
    </create>
  </allow>
</dwr>

posted on 2011-07-30 20:50  帘  阅读(312)  评论(0)  编辑  收藏  举报

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