Flex HttpService获取服务端返回数据 xml object text等
| 语言版本: | ActionScript 3.0 |
| 产品版本: | Flex 3 |
| 运行时版本: | Flash Player 9, AIR 1.1 |
使用 HTTPService 类可表示 ActionScript 中的 HTTPService 对象。当调用 HTTPService 对象的 send() 方法时，将发出对指定 URL 的 HTTP 请求，并且返回 HTTP 响应。可以选择向指定 URL 传递参数。如果没有使用基于服务器的代理服务，则只能使用 HTTP GET 或 POST 方法。如果将 useProxy 属性设置为 true 并使用基于服务器的代理服务，则还可以使用 HTTP HEAD、OPTIONS、TRACE 和 DELETE 方法。
该对象可指定服务器返回数据到httpservice后解析数据的类型,通过设置resultFormat
resultFormat |
属性 |
resultFormat:String
| 语言版本: | ActionScript 3.0 |
| 产品版本: | Flex 3 |
| 运行时版本: | Flash Player 9, AIR 1.1 |
指示如何反序列化由 HTTP 调用返回的结果的值。该项目的值根据以下条件确定：
- 返回的是 XML 还是名称/值对。
- 访问结果的方式；可以将结果作为 object、text 或 XML 进行访问。
默认值为 object。允许使用的值包括：
object返回的值为 XML 并且按照 ActionScript 对象树分析。此为默认。array返回的值是 XML 并且按照 ActionScript 对象树分析。但是，如果顶级对象不是数组，将创建一个新数组并且将结果设置为第一个项目。如果 makeObjectsBindable 为 true，则该数组将被包装在 ArrayCollection 中。xml返回的值为 XML 并且作为 ActionScript XMLnode 对象中的文本 XML 返回。flashvars返回的值是包含由 & 符号分隔的名称=值对的文本，该文本被分析为 ActionScript 对象。text返回的值为文本并且未经处理。e4x返回的值为 XML 并且作为 ActionScript XML 对象中的文本 XML 返回，可以使用 ECMAScript for XML (E4X) 表达式进行访问。
JAVA servlet:
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import javax.servlet.Servlet;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.commons.lang.StringUtils;
import org.springframework.core.io.ClassPathResource;
import org.springframework.core.io.Resource;
public class ConfigService extends HttpServlet implements Servlet {
private static final long serialVersionUID = 1L;
private static final String defaultCharSet = "utf-8";
private static final String defaultContentType = "xml";
/**
* Constructor of the object.
*/
public ConfigService() {
super();
}
/**
* Destruction of the servlet. <br>
*/
public void destroy() {
super.destroy(); // Just puts "destroy" string in log
// Put your code here
}
/**
* The doGet method of the servlet. <br>
*
* This method is called when a form has its tag value method equals to get.
*
* @param request
* the request send by the client to the server
* @param response
* the response send by the server to the client
* @throws ServletException
* if an error occurred
* @throws IOException
* if an error occurred
*/
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doPost(request, response);
}
/**
* The doPost method of the servlet. <br>
*
* This method is called when a form has its tag value method equals to
* post.
*
* @param request
* the request send by the client to the server
* @param response
* the response send by the server to the client
* @throws ServletException
* if an error occurred
* @throws IOException
* if an error occurred
*/
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
String contentType = RequestUtils.getParameter(request, "contentType");
if (StringUtils.isBlank(contentType)) {
contentType = defaultContentType;
}
response.setContentType("text/" + contentType + ";charset="
+ defaultCharSet);
response.setCharacterEncoding(defaultCharSet);
PrintWriter out = response.getWriter();
String configName = RequestUtils.getParameter(request, "configName");
if (StringUtils.isNotBlank(configName)) {
try {
Resource resource = new ClassPathResource("config/"
+ configName + "." + contentType);
BufferedReader bufferedReader = new BufferedReader(
new InputStreamReader(resource.getInputStream(),
defaultCharSet), 1024 * 512);
String line = null;
while ((line = bufferedReader.readLine()) != null) {
out.println(line);
}
} catch (Exception e) {
e.printStackTrace();
}
}
out.flush();
out.close();
}
/**
* Initialization of the servlet. <br>
*
* @throws ServletException
* if an error occurs
*/
public void init() throws ServletException {
// Put your code here
}
}
Flex:
<?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"
creationComplete="application1_creationCompleteHandler(event)">
<fx:Declarations>
<s:HTTPService id="httpService" result="httpService_resultHandler(event)" resultFormat="xml"
url="http://127.0.0.1:8080/ws/servlet">
</s:HTTPService>
</fx:Declarations>
<fx:Script>
<![CDATA[
import mx.events.FlexEvent;
import mx.rpc.events.ResultEvent;
protected function application1_creationCompleteHandler(event:FlexEvent):void
{
httpService.send();
}
protected function httpService_resultHandler(event:ResultEvent):void
{
var xmlResult :XML = XML(event.result);
//xml处理
}
]]>
</fx:Script>
</s:Application>