实战dwr

dwr的准备工作：取得dwr的dwr.jar包和其他dwr所需的其他jar包这里不作介绍了。
本实例所要介绍的是采用dwr来操作页面表单table，发送各种（带有参数包括简单类型，list,map类型）请求，并返回各种信息（包括普通的javabean，java.util.List，java.util.Map信息）,下面是源代码
web.xml
<servlet>
       <servlet-name>dwr-invoker</servlet-name>
       <display-name>DWR Servlet</display-name>
       <servlet-class>uk.ltd.getahead.dwr.DWRServlet</servlet-class>
       <init-param>
           <param-name>debug</param-name>
           <param-value>false</param-value>
       </init-param>
       <init-param>
           <param-name>logLevel</param-name>
           <param-value>WARN</param-value>
       </init-param>
</servlet>
<servlet-mapping>
       <servlet-name>dwr-invoker</servlet-name>
       <url-pattern>/dwr/*</url-pattern>
</servlet-mapping>
dwr.xml
<dwr>
    <allow>
       <create creator="new" javascript="DealerMonitor">
           <param name="class"
              value="com.vstsoft.dataimport.dto.Monitor" />
       </create>
       <convert converter="bean"
           match="com.vstsoft.dataimport.dto.Dealer" />
    </allow>
    <signatures>
       <![CDATA[
       import java.util.List;
       import java.util.Map;
       import com.vstsoft.dataimport.dto.Monitor;
       import com.vstsoft.dataimport.dto.Dealer;
       Monitor.setDealers(List<Dealer>);
       Monitor.setDealersMap(Map<String,Dealer>);
       ]]>
    </signatures>
</dwr>
Dealer.java
package com.vstsoft.dataimport.dto;

public class Dealer {
    private String sid = "";

    private String name = "";

    private String info = "";

    private String level = "";

    private String[] product;

    public String getInfo() {
       return info;
    }

    public void setInfo(String info) {
       this.info = info;
    }

    public String getLevel() {
       return level;
    }

    public void setLevel(String level) {
       this.level = level;
    }

    public String getName() {
       return name;
    }

    public void setName(String name) {
       this.name = name;
    }

    public String[] getProduct() {
       return product;
    }

    public void setProduct(String[] product) {
       this.product = product;
    }

    public String getSid() {
       return sid;
    }

    public void setSid(String sid) {
       this.sid = sid;
    }
}
Monitor.java
package com.vstsoft.dataimport.dto;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Set;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

/**
* author:sunjianbin <br>
* email:volcano_hosan@sina.com
*/
public class Monitor {
    private static Log log = LogFactory.getLog(Monitor.class);

    /**
     * param:String,String return:java.util.List
     * information:dwr调用服务器端类的带有简单参数的方法<br>
     * 返回java.util.List信息
     */
    public List getDealers(String name, String level) {
       log.info("name:" + name + ",level:" + level);
       List list = new ArrayList();
       Dealer dealer = new Dealer();
       dealer.setName("海尔");
       dealer.setInfo("青岛海尔");
       dealer.setLevel("1");
       dealer.setSid("0532001");
       list.add(dealer);
       Dealer dealer2 = new Dealer();
       dealer2.setName("海信");
       dealer2.setInfo("青岛海信");
       dealer2.setLevel("2");
       dealer2.setSid("0532002");
       list.add(dealer2);
       log.info("list size:" + list.size());
       return list;
    }

    /**
     * param:String,String return:java.util.List
     * information:dwr调用服务器端类的带有简单参数的方法<br>
     * 返回一个javaBean信息
     */
    public Dealer getDealer(String name, String level) {
       log.info("经销商名称:" + name + ",经销商级别:" + level);
       Dealer dealer = new Dealer();
       dealer.setName("海尔");
       dealer.setInfo("青岛海尔");
       dealer.setLevel("1");
       dealer.setSid("0532001");
       return dealer;
    }

    /**
     * param:String,String return:java.util.List
     * information:dwr调用服务器端类的带有简单参数的方法<br>
     * 返回java.util.Map信息
     */
    public Map getDealersMap(String name, String level) {
       log.info("经销商名称:" + name + ",经销商级别:" + level);
       Map map = new HashMap();
       Dealer dealer = new Dealer();
       dealer.setName("海军第一舰队");
       dealer.setInfo("总司令肖光");
       dealer.setLevel("1");
       dealer.setSid("6106335");
       map.put("key1", dealer);
       Dealer dealer2 = new Dealer();
       dealer2.setName("空军航空大队");
       dealer2.setInfo("统帅杨勇");
       dealer2.setLevel("2");
       dealer2.setSid("388949596");
       map.put("key2", dealer2);
       log.info("map 的大小：" + map.size());
       return map;
    }

    /**
     * param:java.util.List return:java.util.List
     * information:dwr调用服务器端类的带有java.util.List参数的方法<br>
     * 返回java.util.List信息
     */
    public List setDealers(List dealers) {
       List list = new ArrayList();
       if (dealers != null) {
           for (int i = 0; i < dealers.size(); i++) {
              Dealer dealer = (Dealer) dealers.get(i);
              log.info("经销商名称：" + dealer.getName() + "，经销商详细信息："
                     + dealer.getInfo());
              list.add(dealer);
           }
       }
       return list;
    }

    /**
     * param:java.util.Map return:java.util.Map
     * information:dwr调用服务器端类的带有java.util.Map参数的方法<br>
     * 返回java.util.Map信息
     */
    public Map setDealersMap(Map dealers) {
       Map map = new HashMap();
       if (dealers != null) {
           Set set = dealers.keySet();
           Iterator it = set.iterator();
           while (it.hasNext()) {
              String key = (String) it.next();
              log.info("key:" + key);
              Dealer dealer = (Dealer) dealers.get(key);
              log.info("经销商名称：" + dealer.getName() + "，经销商详细信息："
                     + dealer.getInfo());
              map.put(key, dealer);
           }
       }
       return map;
    }
test.jsp//--------------------------------------------------------->
<%@ page contentType="text/html;charset=GBK" language="java" %>
<html>
    <head>
        <title>dwr功能演示</title>
       <script src='dwr/inte***ce/DealerMonitor.js'> </script>
        <script src='dwr/engine.js'> </script>
        <script src='dwr/util.js'> </script>
    </head>
<SCRIPT language=javascript>
//采用dwr的util.js的DWRUtil得到表单值
function getValue(){
    var name=DWRUtil.getValue("name");
    var info=DWRUtil.getValue("info");
    var product=DWRUtil.getValue("product");
    var level=DWRUtil.getValue("level");
    var sid=DWRUtil.getValue("sid");
    var text=DWRUtil.getText("level");
    var product2=$("product");
    //alert("产品："+product2.value);
    if(level=="-1"){
       alert("请选择经销商级别");
       return false;
    }
    alert("经销商名称："+name+"，经销商详细信息："+info+"，经销商经销产品："+product+"经销商级别："+text+"，经销商级别(参数)："+level+"，隐藏id值："+sid);
    var dealer={name:null,info:null,product:null,level:null,sid:null};
    var params=DWRUtil.getValues(dealer);
    alert(params);
    alert("经销商名称："+dealer.name+"，经销商详细信息："+dealer.info+"，经销商经销产品："+dealer.product+"经销商级别："+dealer.level+"，隐藏id值："+dealer.sid);
}
//从服务器端得到javabean信息
function getValueFormServer(){
    var name=DWRUtil.getValue("name");
    var level=DWRUtil.getValue("level");
    //带有简单参数，回调函数为setValueFromServer
    DealerMonitor.getDealer(setValueFromServer,name,level);
}
function setValueFromServer(dealer){
    alert(dealer.name);
    DWRUtil.removeAllRows("table4");
    //把javabean的信息组装成一个简单的数组，然后显示到页面上
    var array=[{"sid":dealer.sid,"name":dealer.name,"info":dealer.info,"level":dealer.level}];
    DWRUtil.addRows("table4",array,[function(item){return item.sid},function(item){return item.name},function(item){return item.info},function(item){return item.level}]);
}
//从服务器端得到java.util.List类型的信息
function getListValuesFormServer(){
    var name=DWRUtil.getValue("name");
    var level=DWRUtil.getValue("level");
    //带有简单参数，回调函数为setListValuesFromServer
    DealerMonitor.getDealers(setListValuesFromServer,name,level);
}
function setListValuesFromServer(dealers){
    //关于取得java.util.List里面的对象的方法
    for(var i=0;i<dealers.length;i++){
       alert("经销商名称："+dealers[i].name);
    }
    DWRUtil.removeAllRows("table4");
    DWRUtil.addRows("table4",dealers,[function(item){return item.sid},function(item){return item.name},function(item){return item.info},function(item){return item.level}]);
}
//从服务器端得到java.util.Map类型的信息
function getMapValuesFormServer(){
    var name=DWRUtil.getValue("name");
    var level=DWRUtil.getValue("level");
    //带有简单参数，回调函数为setListValuesFromServer
    DealerMonitor.getDealersMap(setMapValuesFromServer,name,level);
}
function setMapValuesFromServer(dealers){
   //关于取得java.util.Map里面的对象的方法
    for(var property in dealers){
      var bean = dealers[property];
       alert(bean.name);
    }
    DWRUtil.removeAllRows("table4");
    DWRUtil.addRows("table4",dealers,[function(item){return dealers[item].name},function(item){return dealers[item].name},function(item){return dealers[item].info},function(item){return dealers[item].level}]);
}
//通过dwr来对一个对象{}来设置其值列表
function setValues(){
    DWRUtil.setValues({name:"上海华联",info:"上海华联商场",product:"2",sid:"1380001",level:"2"});
}
//通过dwr简单的对一个input来设置其值
function setValue(){
    DWRUtil.setValue("name","联合利华");
    DWRUtil.setValue("info","上海黄埔区");
    DWRUtil.setValue("product","2");
    DWRUtil.setValue("sid","021-7862392738");
    DWRUtil.setValue("level","1");
}
//采用dwr来操作select
function deldwrselect(){
    DWRUtil.removeAllOptions("dwrselect");
    var cctv=[{"name":"中央一套","value":"cctv1"},{"name":"中央二套","value":"cctv2"},{"name":"中央三套","value":"cctv3"}];
    DWRUtil.addOptions("dwrselect",cctv,"value","name");
    DWRUtil.setValue("dwrselect", "cctv3");
    var value=DWRUtil.getValue("dwrselect");
    //dwr的DWRUtil.getText仅用于对select的操作
    var text=DWRUtil.getText("dwrselect");
    alert("value:"+value+",text:"+text);
}
//采用dwr来操作table里面的行和列，要采用<tbody>
function deldwrtable(){
    DWRUtil.removeAllRows("table4");
    var items=[{"name":"中国","net":"www.cctv.com.cn","city":"北京"},{"name":"北京","net":"sunjianbin.blog.hexun.com","city":"北京"}];
    DWRUtil.addRows("table4",items,[function(item){return item.name},function(item){return item.net},function(item){return item.city}]);
    //DWRUtil.addRows("table4",['sun','jian','bin'],[function(item){return item;},function(item){return item.toUpperCase();}]);
}
//向服务器发送List的信息
function sendListValueToServer(){
    var dealer={name:null,info:null,product:null,level:null,sid:null};
    DWRUtil.getValues(dealer);
    dealers = [{ name:"中华人民共和国",info:"国务院" ,sid:"01031889296",level:"1"},dealer];
    DealerMonitor.setDealers(setListValuesFromServer,dealers);
}
//向服务器发送Map信息
function sendMapValueToServer(){
    var dealer={name:null,info:null,product:null,level:null,sid:null};
    DWRUtil.getValues(dealer);
    dealers = { "key1":{ name:"中华人民共和国",info:"国务院" ,sid:"01031889296",level:"1"}, "key2":dealer};
    DealerMonitor.setDealersMap(setMapValuesFromServer,dealers);
}
</SCRIPT>
<body>
<table width="75%" border="0" align="center" cellpadding="1" cellspacing="1">
  <tr align="center">
   <td colspan="4">采用DWR得到页面表单信息</td>
  </tr>
  <tr>
    <td width="22%" align="right">经销商名称</td>

    <td colspan="3" align="left"> <input name="name" type="text" id="name" value="国美家电"></td>
  </tr>
  <tr>
    <td align="right">经销商详细信息</td>
    <td colspan="3" align="left"> <textarea name="info" id="info">北京国美</textarea></td>
  </tr>
  <tr>
    <td align="right">经销产品</td>
    <td width="25%" align="left"> <input name="product" type="checkbox" id="product" value="1"></td>
    <td width="28%" align="left"> <input name="product" type="checkbox" id="product" value="2"></td>
    <td width="25%" align="left"> <input name="product" type="checkbox" id="product" value="3"></td>
  </tr>
  <tr>
    <td align="right">行业级别</td>
    <td colspan="3" align="left"> <select name="level" id="level">
        <option value="-1" selected>-选择-</option>
        <option value="0">总代理</option>
        <option value="1">一级代理</option>
        <option value="2">二级代理</option>
      </select></td>
</tr>
  <tr align="center">
    <td colspan="4"> <input name="sid" type="hidden" id="sid" value="123456789">
      <input type="button" name="Submit" value="提交经销商信息" onClick="getValue()">
      <input type="button" name="Submit3" value="批量重设经销商信息" onClick="setValues()">
      <input type="button" name="Submit32" value="逐个重设经销商信息" onClick="setValue()">
    </td>
  </tr>
  <tr align="center">
    <td colspan="4">
<input type="button" name="Submit323" value="往服务器发回List经销商信息" onClick="sendListValueToServer()">
      <input type="button" name="Submit3232" value="往服务器发回Map经销商信息" onClick="sendMapValueToServer()"></td>
  </tr>
</table>
<hr>
<table width="75%" border="0" align="center" cellpadding="1" cellspacing="1">
  <tr align="center">
    <td colspan="3">采用DWR操作select</td>
  </tr>
  <tr>
    <td colspan="3" align="center"> <select name="dwrselect" id="dwrselect">
        <option value="-1" selected>-选择-</option>
        <option value="0">总代理</option>
        <option value="1">一级代理</option>
        <option value="2">二级代理</option>
      </select> </td>
  </tr>
  <tr>
    <td>&nbsp;</td>
    <td>&nbsp;</td>
    <td>&nbsp;</td>
  </tr>
  <tr align="center">
    <td colspan="3">
      <input type="button" name="Submit2" value="dwr删除select列表信息" onClick="deldwrselect()">
    </td>
  </tr>
</table>
<hr>
<table width="75%" border="0" align="center" cellpadding="1" cellspacing="1">
  <tr align="center">
    <td width="100%">采用DWR来操作表Table</td>
  </tr>
</table>
<table width="75%" border="0" align="center" cellpadding="1" cellspacing="1">
  <tr align="center">
    <td width="16%">序号</td>
    <td width="53%">名称</td>
    <td width="31%">行业级别</td>
  </tr>
</table>
<table width="75%" border="0" align="center" cellpadding="1" cellspacing="1">

  <tbody id="table4">

    <tr align="center">

      <td width="16%">1</td>

      <td width="53%">北京国美</td>
      <td width="31%">总代理</td>
    </tr>
    <tr align="center">
      <td>2</td>
      <td>上海联华</td>
      <td>一级代理</td>
    </tr>
    <tr align="center">
      <td>3</td>
      <td>联合利华</td>
     <td>二级代理</td>
    </tr>
  </tbody>
</table>
<table width="75%" border="0" align="center" cellpadding="1" cellspacing="1">
  <tr align="center">
    <td width="100%"><input name="butt" type="button" id="butt" onClick="deldwrtable()" value="dwr删除table所有行">
      <input type="button" name="Submit322" value="从服务器List得到经销商列表信息" onClick="getListValuesFormServer()">
      <input type="button" name="Submit3222" value="从服务器得到单个经销商信息" onClick="getValueFormServer()"></td>
  </tr>
  <tr align="center">
    <td><input type="button" name="Submit3223" value="从服务器Map得到经销商列表信息" onClick="getMapValuesFormServer()"></td>
  </tr>
</table>
<p>&nbsp;</p>
</body>