Flex与Servlet交互

addTime.mxml:<?xml version="1.0" encoding="utf-8"?><mx:Module xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" width="100%" height="100%"><!--加载页面时到该URL取值放入<mx:DataGrid>中--><mx:Model source="http://localhost:8080/TestServlet/GetTime" id="alltime">  </mx:Model><mx:Script><![CDATA[import mx.rpc.events.ResultEvent;import mx.controls.Alert;private function check():void{var start:String=startTime.text;var end:String=endTime.text;if(start==null || end==null || start=="" || end==""){Alert.show("请填写完整数据","信息提示");}else{doSumit();}}//点击按钮触发提交事件private function doSumit():void{submitButton.enabled=false;//按钮置为不可用//URLVariables:应用程序和服务器之间传输变量var params:URLVariables = new URLVariables();//传向的URL  此处的TestServlet/GetTime为我Tomcat下的工程TestServlet,及servlet映射GetTimesubmitTime.url="http://localhost:8080/TestServlet/GetTime";//传输方法,经测试默认为getsubmitTime.method="post";//params.startTime中的startTime是随意起的名称,后台jsp或servlet可用request.getParameter("startTime");来获取值//startTime.text中的startTime是下面的<mx:TextInput>组件的id,其text属性为获取其文本内容//<mx:TextInput>相当于<input type="text">params.startTime = startTime.text;params.endTime = endTime.text;submitTime.send(params);//发出发送指令}//HTTPService处理完提交数据后触发事件,有点类似于aJax的处理数据后对象状态为4时的执行处理private function sentEnd(res:ResultEvent):void{Alert.show("数据已提交","提示信息");//提示框submitButton.enabled=true;//按钮置为可用startTime.text="";endTime.text="";}]]></mx:Script><!--数据通过HTTPService传输--><mx:HTTPService id="submitTime" result="sentEnd(event)"/><mx:Panel width="100%" height="502" layout="absolute" horizontalCenter="5"><mx:HBox width="70%" height="8%" borderColor="#84CAFA" themeColor="#3AA7ED" borderStyle="outset" horizontalCenter="20"><mx:Label text="设置批次" width="10%" fontSize="14" color="#275C7B"/> <mx:Label text="开始时间:" fontSize="11"/><mx:TextInput id="startTime"/><mx:Label text="结束时间:" fontSize="11"/><mx:TextInput id="endTime"/><mx:Button id="submitButton" label="确定" fontSize="11" click="check()"/></mx:HBox><!--绑定DataGrid的数据源dataProvider--><mx:DataGrid dataProvider="{alltime.times}" horizontalCenter="4" verticalCenter="24" width="80%" height="80%" fontSize="11"><mx:columns><mx:DataGridColumn headerText="序号" dataField="id"/><mx:DataGridColumn headerText="批次" dataField="time"/><mx:DataGridColumn headerText="操作" dataField="act"/><mx:DataGridColumn headerText="当前批次" dataField="isnow"/></mx:columns></mx:DataGrid></mx:Panel></mx:Module>-------------------------------------------------------------------------

//Servlet :（url）GetTimepackage servlet;import java.io.IOException;import java.io.PrintWriter;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;public class GetTime extends HttpServlet {/** * Constructor of the object. */public GetTime() {super();}/** * Destruction of the servlet. <br> */public void destroy() {super.destroy(); // Just puts "destroy" string in log// Put your code here}public void doGet(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {doPost(request,response);}public void doPost(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {response.setContentType("text/html");response.setCharacterEncoding("utf-8");PrintWriter out = response.getWriter();if(request.getParameter("startTime")!=null){//接收flex中参数,经不完全测试,只有该转码方式不为乱码String startTime = new String(request.getParameter("startTime").getBytes("ISO-8859-1"),"UTF-8");String endTime = new String(request.getParameter("endTime").getBytes("ISO-8859-1"),"UTF-8");System.out.println(startTime+"  ***  "+endTime);}else{/**初始加载flex中addTime.mxml时从本servlet中取出所要在<mx:DataGrid>中显示的数据 * 目前鄙人只知道能够从xml中获取数据,所以通过servlet做出xml供flex取数据 * 正式项目时此处可改为从数据库取数据**/out.println("<?xml version='1.0' encoding='utf-8' ?>");out.println("<alltime>");out.println("<times>");out.println("<id>1</id>");out.println("<time>2008-6-24</time>");out.println("<act>删除</act>");out.println("<isnow>是</isnow>");out.println("</times>");out.println("<times>");out.println("<id>2</id>");out.println("<time>2008-5-19</time>");out.println("<act>删除</act>");out.println("<isnow>否</isnow>");out.println("</times>");out.println("<times>");out.println("<id>3</id>");out.println("<time>2008-4-16</time>");out.println("<act>删除</act>");out.println("<isnow>否</isnow>");out.println("</times>");out.println("</alltime>");out.flush();out.close();}}/** * Initialization of the servlet. <br> * * @throws ServletException if an error occurs */public void init() throws ServletException {// Put your code here}}