flex4中httpservice与服务器端交互的值传递

flex中的代码：

<!--定义HttpService发送请求-->
<s:HTTPService id="service"
url="http://localhost:8080/testhttpservice/testHttpServiceServlet"
useProxy="false"
fault="service_faultHandler(event)"
result="service_resultHandler(event)">
<!--第一种传值方式-->

<s:request >
<!--参数名称作标签,中间填充参数值-->
<username>{txtusername.text}</username>
<password>{txtpassword.text}</password>
</s:request>

</s:HTTPService>

后台接受参数的代码：

//获取flex传递的参数 username password
String username=request.getParameter("username");
//get方式处理乱码
//username=new String(username.getBytes("ISO-8859-1"),"utf-8");
String password=request.getParameter("password");
//password=new String(password.getBytes("ISO-8859-1"),"utf-8");

方式二：第二种传值方式通过send()方法传值send方法中传递参数 ，服务端接受数据采用request.getParmeter("参数名")获取数据.

示例代码：

//第二种传值方式 通过send()方法传值 send方法中传递参数
//定义一object对象
var val:Object=new Object();
//分别将文本框username，password的值传递到后台
//object对象.参数名=值   传值操作
val.username=txtusername.text;
val.password=txtpassword.text;
service.send(val);

贴出完整的代码：

服务器端:

package com.servlet;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.List;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
* 功能描述:flex httpservice与java交互参数传递探讨<br>
* @author sxyx2008<br>
* @date 2010-07-19
*
*/
@SuppressWarnings("serial")
public class TestHttpServiceServlet extends HttpServlet {

@Override
protected void service(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
//处理post方式乱码
request.setCharacterEncoding("utf-8");
//设置浏览器输出字符编码
response.setCharacterEncoding("utf-8");
PrintWriter writer=response.getWriter();
//获取flex传递的参数 username password
String username=request.getParameter("username");
//get方式处理乱码

//username=new String(username.getBytes("ISO-8859-1"),"utf-8");
String password=request.getParameter("password");
//password=new String(password.getBytes("ISO-8859-1"),"utf-8");

//构建一个list存放一些数据用来模拟用户是否存在这一功能
List<String> list=new ArrayList<String>();
list.add("张三");
list.add("李四");
list.add("王五");
list.add("曹操");
list.add("孙权");
list.add("刘备");
//检验用户
if(list.contains(username)){
writer.print("存在:"+username+"客户端传递的密码是:"+password);
}else{
writer.print("找不到:"+username+"客户端传递的密码是:"+password);
}

}
}

flex代码：

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

//调用失败
protected function service_faultHandler(event:FaultEvent):void
{
Alert.show("失败了:"+event.message,"提示");
}

//调用成功
protected function service_resultHandler(event:ResultEvent):void
{
Alert.show("成功了:"+event.result as String,"提示");
}

//调用
protected function button1_clickHandler(event:MouseEvent):void
{
//第一种传值方式
//service.send();

//第二种传值方式 通过send()方法传值 send方法中传递参数
//定义一object对象
var val:Object=new Object();
//分别将文本框username，password的值传递到后台
//object对象.参数名=值   传值操作
val.username=txtusername.text;
val.password=txtpassword.text;
service.send(val);
}

]]>
</fx:Script>
<fx:Declarations>
<!-- 将非可视元素（例如服务、值对象）放在此处 -->
<!--定义HttpService发送请求-->
<s:HTTPService id="service"
url="http://localhost:8080/testhttpservice/testHttpServiceServlet"
useProxy="false"
fault="service_faultHandler(event)"
result="service_resultHandler(event)">
<!--第一种传值方式-->

<s:request >
<!--参数名称作标签,中间填充参数值-->
<username>{txtusername.text}</username>
<password>{txtpassword.text}</password>
</s:request>

</s:HTTPService>

</fx:Declarations>
<s:TextInput x="332" y="196" id="txtusername"/>
<s:TextInput x="332" y="256" id="txtpassword" displayAsPassword="true"/>
<s:Button x="357" y="311" label="发送" click="button1_clickHandler(event)"/>
<s:Label x="290" y="206" text="用户名:"/>
<s:Label x="297" y="266" text="密码:"/>
</s:Application>