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自己做的一个关于DWR的例子。

2009-09-05 16:57 405 查看

自己做的一个关于DWR的例子。

index.jsp

-------------------------------------------

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">

<title>DWR DEMO</title>

<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">

</head>
<script type='text/javascript' src='/DWRDemo/dwr/interface/DWRExample.js'></script>
<script type='text/javascript' src='/DWRDemo/dwr/engine.js'></script>
<script type='text/javascript' src='/DWRDemo/dwr/util.js'></script>

<script type="text/javascript">

function show()
{
//display list data
DWRExample.getList(call);
}
function call(data)
{
if(data)
{
var content="name age<br/>";
for(var i=0;i<data.length;i++)
{
//alert(data[i].name);
content+=(data[i].name+" "+data[i].age+"<br/>")
}
DWRUtil.setValue("DemoDiv",content);

}
}

function validateForm()
{
//validate user name
//var name=document.getElementById("name");
var name=DWRUtil.getValue("name");
if(name==null || name=="")
{
alert("name is null!");
}else
{

DWRExample.checkUser(name,callBack);

}
}
function callBack(data)
{
if(data)
{
//alert("name is right!");
//name=='xy' return to current page
window.location.href="/DWRDemo/";
}else
{
alert("name is not exist!");
}
}

</script>
<body>
This is my DWR DEOM page. <hr>
<input id="name" name="name" value=""/>
<input type="button" onclick="show();" value=" ok "/>

<br>
<div id="DemoDiv">demo</div>
</body>
</html>
***************************************

dwr.xml

-------------------------------------------------

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

<allow>

<convert converter="bean" match="com.DemoBean"></convert>


<create creator="new" javascript="DWRExample" class="com.DWRExample" scope="session">
<include method="getList"/>
<include method="checkUser"/>
</create>
</allow>
</dwr>

********************************

web.xml

----------------------------------------

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.4"
xmlns="http://java.sun.com/xml/ns/j2ee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"> 
<servlet>
<servlet-name>dwrInvoker</servlet-name>
<servlet-class>org.directwebremoting.servlet.DwrServlet</servlet-class>
<init-param>
<param-name>debug</param-name>
<param-value>true</param-value>
</init-param>
<init-param>
<param-name>classes</param-name>
<param-value>java.lang.Object</param-value>
</init-param>

<load-on-startup>10</load-on-startup>
</servlet>

<servlet-mapping>
<servlet-name>dwrInvoker</servlet-name>
<url-pattern>/dwr/*</url-pattern>
</servlet-mapping>

</web-app>

***************************************]

DWRExample .java

-------------------------------------------------

package com;

import java.io.Serializable;
import java.util.ArrayList;
import java.util.List;

public class DWRExample implements Serializable {

public List getList()
{
List list=new ArrayList();
DemoBean db=null;
for(int i=0;i<5;i++)
{
db=new DemoBean();
db.setAge(22+i);
db.setName("ddh"+i);
list.add(db);
}

return list;

}

public boolean checkUser(String name)
{
if("xy".equals(name))
{
return true;
}else
{
return false;

}
}
}

***********************************

DemoBean .java

---------------------------------------------

package com;

import java.io.Serializable;

public class DemoBean implements Serializable {

private String name;
private int age;

public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}

}

以上例子仅供参考，谢谢

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