无聊在电脑上乱点.点出一个DWR的例子.于是乎开始学习DWR
拿出自己的练习晒下;
在做练习的时候遇到一个问题。web-inf下不生成classes文件夹，也不生成.class文件
经过研究解决办法为：右键点击webmodule 选择properties，再选择Content，选择Include All classes and resources 确定。OK
web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app 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" version="2.4">
<display-name>WebModule1</display-name>
<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>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>dwr-invoker</servlet-name>
<url-pattern>/dwr/*</url-pattern>
</servlet-mapping>
</web-app>
dwr.xml
<?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>
<!-- javascript的对象是jsmethodname,create="new"是DWR自己创建类 -->
<create javascript="jsmethodname" creator="new" scope="application">
<!-- value是java中的类名 -->
<param name="class" value="org.li.dwr.Hello"></param>
<!--<include>标签指定要公开给javascript的方法。不指定的话就公开所有方法。
<exclude>标签指定要防止被访问的方法。-->
<include method="alertStr"/>
<include method="alertJSStr"/>
<include method="returnAl"/>
<include method="getList"/>
<include method="getObj"/>
</create>
<!--转换java类型 -->
<convert converter="bean" match="org.li.dwr.InputRecord">
</convert>
</allow>
</dwr>
jsp页面:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>DWR</title>
<meta http-equiv="content-type" content="text/html; charset=GBK">
<script type='text/javascript' src='dwr/interface/jsmethodname.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>
<!--其中jsmethodname.js是dwr根据配置文件自动生成的，engine.js和util.js是dwr自带的脚本文件。
-->
</head>
<body>
<input id="jbutton" type="button" value="Hello World" onclick="jbClick()"/>
<div id="jdiv"></div>
<div id="jdiv2"></div>
<div id="uid"></div>
<div id="uname"></div>
<div id="usex"></div>
<div id="uaddress"></div>
</body>
</html>
js :hello.js
/*
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
// jsmethodname.alertStr(callback1);//无参数
var data="js传入java中的值";
// jsmethodname.alertJSStr(data,callback);//有参数。第一个为参数，第二个为回调方法接收返回值
jsmethodname.getList(callbackList); //无参数,返回list
//jsmethodname.getObj(callbackObj);
}
function callback1(msg)//回调函数 ，调用java方法的javascript函数
{
//msg就是java方法的返回值
alert(msg);
}
function callback(msg)//回调函数
{
//这里可以进行参数处理DWRUtil 的 setValue() 方法会将传回的 msg 设定给指定 id 的 DOM
DWRUtil.setValue('jdiv',msg);
}
function callbackList(data){
for(var i=0;i<data.length;i++){
DWRUtil.setValue("uid", data[i].id);
DWRUtil.setValue("uname", data[i].name);
DWRUtil.setValue("usex", data[i].sex);
DWRUtil.setValue("uaddress", data[i].address);
}
}
function callbackObj(data){
//知道属性
DWRUtil.setValue("uid", data.id);
DWRUtil.setValue("uname", data.name);
DWRUtil.setValue("usex", data.sex);
DWRUtil.setValue("uaddress", data.address);
/**
* 不知道属性
for(var property in data){
//alert("property:"+property);
alert(property+":"+data[property]);
}
*/
}
java类
Hello.java
package org.li.dwr;
import java.util.Date;
import java.util.ArrayList;
import java.util.List;
public class Hello {
public String getHelloWorld() {
return "现在的时间为：" + new Date();
}
public String alertStr() {
return "DWR框架：无参数";
}
public String alertJSStr(String jsvalue) {
return "DWR框架:" + jsvalue;
}
public ArrayList returnAl() {
ArrayList al = new ArrayList();
al.set(1, "a");
al.set(2, "b");
al.set(3, "c");
al.set(4, "d");
return al;
}
public List getList() {
List list = new ArrayList();
for(int i=0;i<5;i++){
InputRecord ir = new InputRecord();
ir.setId(1);
ir.setName("依韵");
ir.setSex("男");
ir.setAddress("北京市");
list.add(ir);
}
return list;
}
public InputRecord getObj() {
InputRecord ir = new InputRecord();
ir.setId(2);
ir.setName("白色黄昏");
ir.setSex("女");
ir.setAddress("河南");
return ir;
}
}
InputRecord.java
package org.li.dwr;
public class InputRecord {
private int id;
private String name;
private String sex;
private String address;
public String getAddress() {
return address;
}
public int getId() {
return id;
}
public String getName() {
return name;
}
public String getSex() {
return sex;
}
public void setSex(String sex) {
this.sex = sex;
}
public void setName(String name) {
this.name = name;
}
public void setAddress(String address) {
this.address = address;
}
public void setId(int id) {
this.id = id;
}
}
posted on 2009-03-19 12:50
武志强 阅读(227)
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