DWR又一例级联（省份-城市）

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JS(javaScript)

DWR Servlet JavaScript XML Web

我用DWR做了一个级联选择的例子，希望能给你带来方便，谢谢！！！

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>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>
  <init-param>
   <param-name>activeReverseAjaxEnabled</param-name>
   <param-value>true</param-value>
  </init-param>
  <init-param>
   <param-name>
    initApplicationScopeCreatorsAtStartup
   </param-name>
   <param-value>true</param-value>
  </init-param>
  <init-param>
   <param-name>maxWaitAfterWrite</param-name>
   <param-value>500</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>

<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
</web-app>

dwr.xml---------------------

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE dwr PUBLIC "-//GetAhead Limited//DTD Direct Web Remoting 2.0//EN" "http://getahead.org/dwr/dwr20.dtd">

<dwr>

<allow>

</allow>

</dwr>

hand.js-------------

//handle   author ddh
function _load(){
DWRHandle.getProvinceList(loadCall);
}
//callback
function loadCall(data)
{
if(data)
{
  var selects="<select id='province' onchange='showCity()'><option id='0' >省份</option>";

  for(var i=0;i<data.length;i++)
  {
   selects=selects+"<option id='"+data[i].id+"'>"+data[i].name+"</option>";
  }
  selects=selects+"</select>";

   //DWRUtil.setValue("proninceDiv",selects,true);
  document.getElementById("proninceDiv").innerHTML=selects;
}
}

}
//callback
function showCityCall(data)
{
if(data)
{
  var selects="<select id='city' onchange='getCity()'><option id='0' >城市</option>";

  for(var i=0;i<data.length;i++)
  {
   selects=selects+"<option id='"+data[i].id+"'>"+data[i].name+"</option>";
  }
  selects=selects+"</select>";

  document.getElementById("cityDiv").innerHTML=selects;

}

}
function getCity()
{
var citys=document.getElementById("city");

for(i=0;i<citys.options.length;i++)
{
   if(citys.options[i].selected){
   alert(citys.options[i].innerHTML);

   }
}
}

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>cascade page</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">


<script type='text/javascript' src='/CascadeofDWR/dwr/interface/DWRHandle.js'></script>
<script type='text/javascript' src='/CascadeofDWR/dwr/engine.js'></script>
<script type='text/javascript' src='/CascadeofDWR/dwr/util.js'></script>
<script type='text/javascript' src='js/handle.js'></script>
</head>

<body onload="_load();">
    Welcome to here! <br>
    <br/>
    <table>
    <tr><td> <div id="proninceDiv"></div></td><td><div id="cityDiv" /></td></tr>
    </table>



</body>
</html>

其详细资料请看附件，谢谢。

CascadeofDWR.rar (436.8 KB)
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ajax又一例（mootools） | 一个关于ajax的例子(prototype)

2008-04-11 14:29
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1 楼 hxdream 2008-04-12

我想问下,为什么不用dwr中util.js的方法来生成呢?不是更好用点吗,而且代码也不用这么长

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