dwr的第二个例子(显示loading)

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DWR Servlet Ajax JSP JavaScript

欢迎访问: www.ptcms.cn

相关配置和文档如下:

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

<?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>

<create javascript="Loading" creator="new">
     <param name="class" value="cn.lh.dwr.Loading" />
    </create>
</allow>

</dwr>

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

<%@ page language="java" import="java.util.*" pageEncoding="gbk"%>
<%
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>My JSP 'loading.jsp' starting 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 src="dwr/interface/Loading.js"></script>
  <script src="dwr/engine.js" /></script>
  <script src="dwr/util.js" /></script>
   <script type="text/javascript">
     function getuserinfor(){
      //显示loading界面：
      useLoadingMessage("正在与后台处理，请秒候. . .")

     var textinfor = dwr.util.getValue("text_id");
     Loading.getUser(textinfor,callback);
      }
     function callback(data){
      dwr.util.setValue(result,data);
     }
   /**loading*/
var useLoadingMessage = function(message) {
var loadingMessage;
if (message) loadingMessage = message;
else loadingMessage = "Loading";
dwr.engine.setPreHook(function() {
    var disabledZone = dwr.util.byId('disabledZone');
    if (!disabledZone) {
      disabledZone = document.createElement('div');
      disabledZone.setAttribute('id', 'disabledZone');
      disabledZone.style.position = "absolute";
      disabledZone.style.zIndex = "1000";
      disabledZone.style.left = "-400px";
      disabledZone.style.top = "0px";
      disabledZone.style.width = "100%";
      disabledZone.style.height = "100%";
      document.body.appendChild(disabledZone);
      var messageZone = document.createElement('div');
      messageZone.setAttribute('id', 'messageZone');
      messageZone.style.position = "absolute";
      messageZone.style.top = "0px";
      messageZone.style.right = "0px";
      messageZone.style.background = "blue";
      messageZone.style.color = "red";
      messageZone.style.fontFamily = "Arial,Helvetica,sans-serif";
      messageZone.style.padding = "4px";
      disabledZone.appendChild(messageZone);
      var text = document.createTextNode(loadingMessage);
      messageZone.appendChild(text);
      dwr.util._disabledZoneUseCount = 1;
    }
    else {
      dwr.util.byId('messageZone').innerHTML = loadingMessage;
      disabledZone.style.visibility = 'visible';
      dwr.util._disabledZoneUseCount++;
    }
});
dwr.engine.setPostHook(function() {
    dwr.util._disabledZoneUseCount--;
    if (dwr.util._disabledZoneUseCount == 0) {
      dwr.util.byId('disabledZone').style.visibility = 'hidden';
    }
});

}

   </script>
</head>

<body>
    你的用户名:<br/>
    <input type="text" id="text_id" onchange="getuserinfor();"/>
    返回的结果:
    <span id="result"></span>
</body>
</html>
--------------------------------

package cn.lh.dwr;

public class Loading {

public String getUser(String user){
  try {
   Thread.sleep(1000);
  } catch (InterruptedException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }
  return "hello "+user+"当前服务器时间:"+System.currentTimeMillis() ;
}
}
----------------------------------------------

<?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>-1</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>

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SSL协议是什么？ | dwr的一个实例(参考蓝杰--胡东峰相关资料 ...

2008-11-27 01:53
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1 楼 weirihai 2008-11-27

还能提供一些DWR的例子吗？已经如何使用啊!!我是刚学这个的希望提供具体的资料
我的邮箱weirihai0204@yahoo.com.cn

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