dwr使用

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1、maven添加需要的jar包

<dependencies>
    <dependency>
		<groupId>org.directwebremoting</groupId>
		<artifactId>dwr</artifactId>
		<version>3.0.M1</version>
	</dependency>
	<dependency>
		<groupId>commons-logging</groupId>
		<artifactId>commons-logging</artifactId>
		<version>1.1.2</version>
	</dependency>
  </dependencies>

2、配置web.xml

<servlet>
    <servlet-name>dwr-invoker</servlet-name>
    <servlet-class>org.directwebremoting.servlet.DwrServlet</servlet-class>
    <init-param>
	<param-name>debug</param-name>
	<param-value>true</param-value>
    </init-param>
   <!-- 加入跨域配置 -->
      <init-param>
             <param-name>crossDomainSessionSecurity</param-name>
             <param-value>false</param-value>
      </init-param>
      <init-param>
            <param-name>allowScriptTagRemoting</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、在web.xml所在目录添加dwr.xml

<!DOCTYPE dwr PUBLIC
    "-//GetAhead Limited//DTD Direct Web Remoting 3.0//EN"
    "http://directwebremoting.org/schema/dwr30.dtd">

<dwr>
  <allow>
    <create creator="new" javascript="remote">
      <param name="class" value="com.xiaobing.shopping.Remote"/>
    </create>
  </allow>
</dwr>

4、添加java类

package com.xiaobing.shopping;

public class Remote {
	public String sayHello(String yourName) {
		return "Hello World " + yourName;
	}
}

5、添加页面

<html>
<head>
<script type='text/javascript' src='dwr/util.js'></script>
<script type="text/javascript" src="dwr/engine.js"></script>
<!-- 上面两个直接引用不需要在项目中有 -->
<script type="text/javascript" src="dwr/interface/remote.js"></script>
<script type="text/javascript">
	function firstDwr() {
		remote.sayHello("Jorwen", function(data) {
			alert(data);
		});
	}
</script>
</head>
<body onload="firstDwr();">
</body>
</html>

6、测试

输入http://localhost:8080/工程名/dwr/