JDK6新玩具---HttpServer的使用

介绍摘自网络:
   JDK6提供了一个简单的Http Server API,据此我们可以构建自己的嵌入式Http Server,它支持Http和Https协议,提供了HTTP1.1的部分实现，没有被实现的那部分可以通过扩展已有的Http Server API来实现,程序员必须自己实现HttpHandler接口,HttpServer会调用HttpHandler实现类的回调方法来处理客户端请求,在这里,我们把一个Http请求和它的响应称为一个交换,包装成HttpExchange类,HttpServer负责将HttpExchange传给HttpHandler实现类的回调方法
 
   我想开发一个j2se的小程序，它能接受网页传来的参数，并对传来参数做些处理。我希望这个小程序即可能接受网页传过来的参数，也能接受OutputStream流传来参数，JDK6新特性能够实现。
一、提供http服务的类
Java代码  收藏代码
package com.tdt.server.httpserver;  
  
import java.io.BufferedReader;  
import java.io.IOException;  
import java.io.InputStream;  
import java.io.InputStreamReader;  
import java.io.OutputStream;  
import java.net.InetSocketAddress;  
  
import com.sun.net.httpserver.HttpExchange;  
import com.sun.net.httpserver.HttpHandler;  
import com.sun.net.httpserver.HttpServer;  
import com.sun.net.httpserver.spi.HttpServerProvider;  
  
/** 
 * @project SimpleHttpServer 
 * @author sunnylocus 
 * @vresion 1.0 2009-9-2 
 * @description  自定义的http服务器 
 */  
public class MyHttpServer {  
    //启动服务，监听来自客户端的请求  
    public static void httpserverService() throws IOException {  
        HttpServerProvider provider = HttpServerProvider.provider();  
        HttpServer httpserver =provider.createHttpServer(new InetSocketAddress(6666), 100);//监听端口6666,能同时接 受100个请求  
        httpserver.createContext("/myApp", new MyHttpHandler());   
        httpserver.setExecutor(null);  
        httpserver.start();  
        System.out.println("server started");  
    }  
    //Http请求处理类  
    static class MyHttpHandler implements HttpHandler {  
        public void handle(HttpExchange httpExchange) throws IOException {  
            String responseMsg = "ok";   //响应信息  
            InputStream in = httpExchange.getRequestBody(); //获得输入流  
            BufferedReader reader = new BufferedReader(new InputStreamReader(in));  
            String temp = null;  
            while((temp = reader.readLine()) != null) {  
                System.out.println("client request:"+temp);  
            }  
            httpExchange.sendResponseHeaders(200, responseMsg.length()); //设置响应头属性及响应信息的长度  
            OutputStream out = httpExchange.getResponseBody();  //获得输出流  
            out.write(responseMsg.getBytes());  
            out.flush();  
            httpExchange.close();                                 
              
        }  
    }  
    public static void main(String[] args) throws IOException {  
        httpserverService();  
    }  
}  
 
二、测试类
Java代码  收藏代码
package com.tdt.server.test;  
  
import java.io.BufferedReader;  
import java.io.IOException;  
import java.io.InputStream;  
import java.io.InputStreamReader;  
import java.io.OutputStream;  
import java.net.HttpURLConnection;  
import java.net.URL;  
import java.util.concurrent.ExecutorService;  
import java.util.concurrent.Executors;  
  
/** 
 * @project SimpleHttpServer 
 * @author sunnylocus 
 * @vresion 1.0 2009-9-2 
 * @description 测试类   
 */  
public class Test {  
    public static void main(String[] args) {  
        ExecutorService exec = Executors.newCachedThreadPool();  
        // 测试并发对MyHttpServer的影响  
        for (int i = 0; i < 20; i++) {  
            Runnable run = new Runnable() {  
                public void run() {  
                    try {  
                        startWork();  
                    } catch (IOException e) {  
                        e.printStackTrace();  
                    }  
                }  
            };  
            exec.execute(run);  
        }  
        exec.shutdown();// 关闭线程池  
    }  
  
    public static void startWork() throws IOException {  
        URL url = new URL("http://127.0.0.1:6666/myApp");  
        HttpURLConnection urlConn = (HttpURLConnection) url.openConnection();  
        urlConn.setDoOutput(true);  
        urlConn.setDoInput(true);  
        urlConn.setRequestMethod("POST");  
        // 测试内容包  
        String teststr = "this is a test message";  
        OutputStream out = urlConn.getOutputStream();  
        out.write(teststr.getBytes());  
        out.flush();  
        while (urlConn.getContentLength() != -1) {  
            if (urlConn.getResponseCode() == 200) {  
                InputStream in = urlConn.getInputStream();  
                BufferedReader reader = new BufferedReader(new InputStreamReader(in));  
                String temp = "";  
                while ((temp = reader.readLine()) != null) {  
                    System.err.println("server response:" + temp);// 打印收到的信息  
                }  
                reader.close();  
                in.close();  
                urlConn.disconnect();  
            }  
        }  
    }  
}  
 
注意：经过我测试发现httpExchange.sendResponseHeaders(200, responseMsg.length())有bug,如果responseMsg里面包含中文的话，客户端不会收到任何信息，因为一个汉字用二个字节表示。
应修改为：
httpExchange.sendResponseHeaders(HttpURLConnection.HTTP_OK, responseMsg.getBytes().length);

<span style="font-family: Arial, Helvetica, sans-serif;">http://sunnylocus.iteye.com/blog/460945</span>

JDK6新玩具---HttpServer的使用

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