首先：
1.jar包：dwr.jar
放到WEB-INF/lib裏面
2.web.xml 配置
<!-- dwr -->
<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>
</servlet>
<servlet-mapping>
<servlet-name>dwr-invoker</servlet-name>
<url-pattern>/dwr/*</url-pattern>
</servlet-mapping>
3.dwr.xml 配置
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE dwr PUBLIC "-//GetAhead Limited//DTD Direct Web Remoting 2.0//EN" "http://www.getahead.ltd.uk/dwr/dwr20.dtd">
<dwr>
<allow>
<create creator="new" javascript="Hello" scope="page">
<param name="class" value="com.Hello" />
</create>
</allow>
</dwr>
4.Hello.java 方法
package com;
public class Hello {
public String hello(String name) {
return name+"：DWR配置成功！";
}
public boolean checknum(int num){
boolean flag = false;
if(num >= 18){
flag = true;
}
if(num < 18){
flag = false;
}
return flag;
}
}
5.demo.html 頁面
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>demo.html</title>
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="this is my page">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<script type="text/javascript" src="dwr/engine.js"></script>
<script type="text/javascript" src="dwr/util.js"></script>
<script type="text/javascript" src="dwr/interface/Hello.js"></script>
<script type="text/javascript">
function callbackname(str){
alert(str);
}
function callbacknum(str){
if(str){
alert("已成年！");
}else{
alert("未成年！");
}
}
function testname() {
var name = document.getElementById("name").value;
Hello.hello(name,callbackname);
}
function testnum() {
var age = document.getElementById("age").value;
Hello.checknum(age,callbacknum);
}
</script>
</head>
<body>
<input id="name" type="text" οnblur="testname()"/>
<input id="age" type="text" οnblur="testnum()"/>
</body>
</html>
