DWR中文文档

DWR是作为远程调用的ajax框架，将服务端的java类，方法和浏览器的javascript的类，方法对应起来。现在官方最新的版本是DWR2.0，可以在http://getahead.ltd.uk/dwr/download下载到。
我们真对DWR2.0做一些例子讲解一下它的特性：
Hello World：
新建一个web项目DWRStudy，在项目中构建路径中加入dwr.jar，
新建类Hello如下：

代码

package org.li.dwr;
package org.li.dwr;
import java.util.Date;
public class Hello
{
public String getHelloWorld()
{
return "现在的时间为："+new Date();
}
}

代码

xml version="1.0" encoding="UTF-8"?>
>
<dwr>
<allow>
<create javascript="jshello" creator="new" scope="application">
<param name="class" value="org.li.dwr.Hello">param>
create>
allow>
dwr>

代码

function load()//载入的时候调用
{
var jbutton = document.getElementById("jbutton");
jbutton.onclick=function(event)//注册按钮点击事件
{
jbClick();
};
}
function jbClick()//按钮点击事件
{
jshello.getHelloWorld(callback);//没有参数传递，只传递回调函数就行
}
function callback(msg)//回调函数
{
DWRUtil.setValue('jdiv',msg);
}

代码

>
<html>
<head>
<title>HelloWorld.htmltitle>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<script type='text/javascript' src='dwr/interface/jshello.js'>script>
<script type='text/javascript' src='dwr/engine.js'>script>
<script type='text/javascript' src='dwr/util.js'>script>
<script type="text/javascript" src="hello.js">script>
head>
<body>
<input id="jbutton" type="button" value="得到Hello World"/>
<div id="jdiv">div>
<script>load()script>
body>
html>

代码

<servlet>
<servlet-name>dwr-invokerservlet-name>
<servlet-class>
org.directwebremoting.servlet.DwrServlet
servlet-class>
<init-param>
<param-name>debugparam-name>
<param-value>trueparam-value>
init-param>
<load-on-startup>1load-on-startup>
servlet>
<servlet-mapping>
<servlet-name>dwr-invokerservlet-name>
<url-pattern>/dwr/*url-pattern>
servlet-mapping>

代码

package org.li.dwr;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Properties;
public class User
{
private String welcome;
private String username;
private String address;
private List<book></book> books;
private int age;
public String getAddress()
{
return address;
}
public void setAddress(String address)
{
this.address = address;
}
public int getAge()
{
return age;
}
public void setAge(int age)
{
this.age = age;
}
public String getUsername()
{
return username;
}
public void setUsername(String username)
{
this.username = username;
}
public String getWelcome()
{
return welcome;
}
public void setWelcome(String welcome)
{
this.welcome = welcome;
}
public List<book></book> getBooks()
{
return books;
}
public void setBooks(List<book></book> books)
{
this.books = books;
}
public List<book></book> getBook()
{
this.books = new ArrayList<book></book>();
Book javaBook = new Book();
Book vcBook = new Book();
javaBook.setAuthor("孙鑫");
vcBook.setAuthor("孙鑫");
javaBook.setName("java Web开发详解");
vcBook.setName("vc++深入详解");
this.books.add(javaBook);
this.books.add(vcBook);
return this.books;
}
public User getUser(String welcome)
{
this.welcome=welcome;
try
{
FileInputStream fis = new FileInputStream("D:\\workspace\\DWRStudy\\src\\user.properties");
Properties pp = new Properties();
pp.load(fis);
this.username=pp.getProperty("username");
this.age=Integer.valueOf(pp.getProperty("age"));
this.address=pp.getProperty("address");
fis.close();
}
catch (FileNotFoundException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
catch (IOException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
return this;
}
}

代码

package org.li.dwr;
public class Book
{
private String name;
private String author;
public String getAuthor()
{
return author;
}
public void setAuthor(String author)
{
this.author = author;
}
public String getName()
{
return name;
}
public void setName(String name)
{
this.name = name;
}
}

代码

package org.li.dwr.log;
import java.lang.reflect.Method;
import org.directwebremoting.AjaxFilterChain;
public class DWRLog implements org.directwebremoting.AjaxFilter
{
public Object doFilter(Object obj, Method method, Object[] params, AjaxFilterChain chain) throws Exception
{
System.out.println("过滤器Log输出:..对象："+obj.getClass().getName()+"方法："+method.getName());
return chain.doFilter(obj, method,params);
}
}

代码

<create javascript="jsuser" creator="new">
<param name="class" value="org.li.dwr.User">param>
<include method="getUser"/>
<include method="getBook"/>
<filter class="org.li.dwr.log.DWRLog">filter>
create>
<convert match="org.li.dwr.User" converter="bean">convert>
<convert match="org.li.dwr.Book" converter="bean">convert>

代码

>
<html>
<head>
<title>UserInfo.htmltitle>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<script type='text/javascript' src='dwr/interface/jsuser.js'>script>
<script type='text/javascript' src='dwr/engine.js'>script>
<script type='text/javascript' src='dwr/util.js'>script>
<script type="text/javascript" src="userInfo.js">script>
head>
<body>
请输入你的名字：
<input id="name" type="text"/>
<input id="jbutton" type="button" value="得到javafish的信息"/>
<input id="sbutton" type="button" value="得到javafish的书"/>
<div id="result">div>
<script>load()script>
body>
html>

代码

function load()
{
var jbutton = $("jbutton");
jbutton.onclick=function(event)
{
bOnClick();
};
var sbutton = $("sbutton");
sbutton.onclick=function(event)
{
sOnClick();
};
}
function bOnClick()
{
jsuser.getUser($("name").value,callback);
}
function callback(msg)
{
var user = msg;
DWRUtil.setValue('result',"欢迎你！"+user.welcome+" 姓名："+user.username+",年龄："+user.age+"，住址："+user.address+user.books[0].author);
}
function sOnClick()
{
jsuser.getBook(callbackBooks);
}
function callbackBooks(msg)
{
alert(msg);
DWRUtil.setValue('result',msg);
}

代码

package org.li.dwr.spring;
import java.util.List;
import org.li.dwr.Book;
public class User
{
private String welcome;
private String username;
private String address;
private List<book></book> books;
private int age;
public String getAddress()
{
return address;
}
public void setAddress(String address)
{
this.address = address;
}
public int getAge()
{
return age;
}
public void setAge(int age)
{
this.age = age;
}
public String getUsername()
{
return username;
}
public void setUsername(String username)
{
this.username = username;
}
public String getWelcome()
{
return welcome;
}
public void setWelcome(String welcome)
{
this.welcome = welcome;
}
public List<book></book> getBooks()
{
return books;
}
public void setBooks(List<book></book> books)
{
this.books = books;
}
public User getUser(String welcome)
{
this.welcome=welcome;
return this;
}
}

代码

xml

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spring+hibernate之applicationContext.xml ...

2007-01-11 16:12
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评论(1)
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1 楼 wangdi 2007-01-23

http://likunkun.iteye.com/blog/40313
呵呵……

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