都知道spring很强大，而dwr 相对来说是ajax 一个很好的框架，下面就来看看如何用spring集成dwr
当然还是的是首先建立一个web工程
建立好之后 我们先写后台
UserManager .java
package com.ajax.dwr;
public class UserManager
{
public boolean getUser(String username)
{
System.out.println(username);
if (username.equals("aaa"))
{
return true;
}
else
{
return false;
}
}
}
写好之后再写web.xml文件
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5"
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_2_5.xsd">
<welcome-file-list>
<welcome-file>index.html</welcome-file>
</welcome-file-list>
<servlet>
<servlet-name>dwr</servlet-name>
<servlet-class>
org.directwebremoting.servlet.DwrServlet
</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>dwr</servlet-name>
<url-pattern>/SpringDWR/*</url-pattern>
</servlet-mapping>
<!-- 这种也可以 -->
<!-- <servlet>
<servlet-name>context</servlet-name>
<servlet-class>
org.springframework.web.context.ContextLoaderServlet
</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>-->
<!-- 监听器 -->
<listener>
<listener-class>
org.springframework.web.context.ContextLoaderListener
</listener-class>
</listener>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/applicationContext.xml</param-value>
</context-param>
</web-app>
然后我们在写一个dwr.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5"
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_2_5.xsd">
<welcome-file-list>
<welcome-file>index.html</welcome-file>
</welcome-file-list>
<servlet>
<servlet-name>dwr</servlet-name>
<servlet-class>
org.directwebremoting.servlet.DwrServlet
</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>dwr</servlet-name>
<url-pattern>/SpringDWR/*</url-pattern>
</servlet-mapping>
<!-- 这种也可以 -->
<!-- <servlet>
<servlet-name>context</servlet-name>
<servlet-class>
org.springframework.web.context.ContextLoaderServlet
</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>-->
<!-- 监听器 -->
<listener>
<listener-class>
org.springframework.web.context.ContextLoaderListener
</listener-class>
</listener>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/applicationContext.xml</param-value>
</context-param>
</web-app>
然后我们看spring的配置文件
<?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-2.5.xsd">
<bean id="SpringManager" class="com.ajax.dwr.UserManager">
</bean>
</beans>
配置文件写完了，然后我们在写html页面
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>index.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">
<!--<link rel="stylesheet" type="text/css" href="./styles.css">-->
<!-- 引用样式 -->
<script type="text/javascript" src="SpringDWR/engine.js"></script>
<script type="text/javascript" src="SpringDWR/util.js"></script>
<script type="text/javascript" src="SpringDWR/interface/aaa.js"></script>
<script type="text/javascript">
function check1()
{
var aa=document.getElementById("name1").value;
if(aa.length==0)
{
alert("用户名不能为空");
return false;
}
return true;
}
function checkRepeat()
{
if(check1())
{
var name=dwr.util.getValue("name");
//类里面的方法
aaa.getUser(name,function(data)
{
//data==true
if(data)
{
alert("用户名已经存在");
}
else
{
alert("该用户名可以使用");
}
});
}
}
</script>
</head>
<body>
用户名:
<input type="text" name="name" id="name1">
<input type="button" value="检查用户名是否重复" οnclick="checkRepeat()">
</body>
</html>
