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  • Flex之HTTPService组件调用

    1、采用<s:HTTPService>标签来实现:

    <?xml version="1.0" encoding="utf-8"?>
    <s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"
      xmlns:s="library://ns.adobe.com/flex/spark"
      xmlns:mx="library://ns.adobe.com/flex/mx" minWidth="955" minHeight="600" >

      <s:Label x="61" y="138" text="HttpService:"/>
      <s:TextInput x="152" y="128" id="http_txt"/>
      <s:Button x="289" y="129" id="btn_login" label="发送" click="button2_clickHandler(event)"/>
      <s:Label x="383" y="138" id="http_result"/>

      <fx:Script>
        <![CDATA[
          import mx.rpc.events.ResultEvent;
          import mx.controls.Alert;
          import mx.rpc.events.FaultEvent;
          //HttpService的形式访问Java服务器
          protected function button2_clickHandler(event:MouseEvent):void
          {
            btn_login.addEventListener(MouseEvent.CLICK,login);
            //加载HTTPService的返回监听
            httpSer.addEventListener(ResultEvent.RESULT,httpSerResultHandler);
            httpSer.addEventListener(FaultEvent.FAULT,httpSerFaultHandler);
          }
          private function login(event:MouseEvent):void{
            httpSer.send();//发送请求
          }
          //返回成功事件
          private function httpSerResultHandler(event:ResultEvent):void{
            Alert.show(event.result.toString(),"登录提示");
          }
          //返回失败事件
          private function httpSerFaultHandler(event:FaultEvent):void{
            Alert.show(event.fault.message as String,"登录提示");
          }
        ]]>
      </fx:Script>
      <fx:Declarations>
        <s:HTTPService id="httpSer" url="http://localhost:8080/html/FlexServlet" method="POST">
          <s:request>
            <!--需要发送到服务器的参数名,及值,接收参数名时必须一致i。其中name表示参数名称。-->
            <name>{http_txt.text}</name>
          </s:request>
        </s:HTTPService>
      </fx:Declarations>
    </s:Application>

    2、采用创建HTTPService对象:

    <?xml version="1.0" encoding="utf-8"?>
    <s:Application xmlns:fx="http://ns.adobe.com/mxml/2009" 
      xmlns:s="library://ns.adobe.com/flex/spark" 
      xmlns:mx="library://ns.adobe.com/flex/mx" minWidth="955" minHeight="600" >

      <s:Label x="61" y="138" text="HttpService:"/> 
      <s:TextInput x="152" y="128" id="http_txt"/> 
      <s:Button x="289" y="129" id="btn_login" label="发送" click="button2_clickHandler(event)"/> 
      <s:Label x="383" y="138" id="http_result"/> 

      <fx:Script> 
        <![CDATA[ 
          import mx.rpc.events.ResultEvent;
          import mx.controls.Alert;
          import mx.rpc.events.FaultEvent;
          import mx.rpc.http.HTTPService;

          protected function button2_clickHandler(event:MouseEvent):void 
          { 
            

            var http:HTTPService = new HTTPService();
            http.url = "http://localhost:8080/html/FlexServlet0?name="+http_txt.text;
            http.send();
            http.addEventListener(ResultEvent.RESULT,httpSerResultHandler);
            http.addEventListener(FaultEvent.FAULT,httpSerFaultHandler);

          } 
          private function login(event:MouseEvent):void{
            httpSer.send();//发送请求
          }
          //返回成功事件
          private function httpSerResultHandler(event:ResultEvent):void{
            Alert.show(event.result.toString(),"登录提示");
          }
          //返回失败事件
          private function httpSerFaultHandler(event:FaultEvent):void{
            Alert.show(event.fault.message as String,"登录提示");
          }
        ]]> 
      </fx:Script> 
      <fx:Declarations>
        
      </fx:Declarations>
    </s:Application>

    3、在JavaWeb项目中新建Servlet(FlexServlet) :

    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    		  String name = request.getParameter("name");   
                  response.setCharacterEncoding("UTF-8");   
                  PrintWriter pw = response.getWriter();   
                  pw.write("你好["+name+"]这是来自Httpservice的消息...当前Session是:"+request.getSession());   
                  pw.close();   
    	}
    

      

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  • 原文地址:https://www.cnblogs.com/lbangel/p/3181710.html
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