DWR框架笔记
1. 首先来搭下环境。
1》 引入dwr.jar包。
2》 在web.xml中添加如下代码。
<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>
3》在WEB-INF文件夹中添加dwr.xml配置文件。
<?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>
</dwr>
2. 然后开始编写我们的东西了。。
1》写个类(类似AJAX访问时的Servlet功能)
package com.you.me;
public class HelloWorld {
public String helloStr(String name) {
System.out.println("Hello " + name + "!!");
return "Hello " + name + "!!";
}
}
2》在dwr.xml文件中,添加如下代码。
<?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="new" javascript="Hello">
<param name="class" value="com.you.me.HelloWorld" />
</create>
</allow>
</dwr>
3》编写页面。
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv=Content-Type content="text/html; charset=utf-8">
<script src="dwr/engine.js"></script>
<script src="dwr/util.js"></script>
<script src="dwr/interface/Hello.js"></script>
<script language="javascript">
function callBack(data) {
alert(data);
}
function show() {
Hello.helloStr(document.getElementById("name").value, callBack);
}
</script>
</head>
<body>
name:<input type="text" id="name" name="name">
<br />
<input type="button" value="提交" onclick="show();">
</body>
</html>
如此即可。