Flex与Servlet交互

转自：http://www.voidcn.com/article/p-gjaavqlf-qa.html

[xml] view plain copy print ?

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%">
<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GetTime
submitTime.url="http://localhost:8080/TestServlet/GetTime";
//传输方法,经测试默认为get
submitTime.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>
<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>
<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>
-------------------------------------------------------------------------

[java] view plain copy print ?

//Servlet :（url）GetTime
package 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
}
}

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