JDK6新玩具---HttpServer的使用

2009 - 09 - 02

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JDK6新玩具---HttpServer的使用

关键字: httpserver httpserverprovider

   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

1. package com.tdt.server.httpserver;   
2.   
3. import java.io.BufferedReader;   
4. import java.io.IOException;   
5. import java.io.InputStream;   
6. import java.io.InputStreamReader;   
7. import java.io.OutputStream;   
8. import java.net.InetSocketAddress;   
9.   
10. import com.sun.net.httpserver.HttpExchange;   
11. import com.sun.net.httpserver.HttpHandler;   
12. import com.sun.net.httpserver.HttpServer;   
13. import com.sun.net.httpserver.spi.HttpServerProvider;   
14.   
15. /**  
16.  * @project SimpleHttpServer  
17.  * @author sunnylocus  
18.  * @vresion 1.0 2009-9-2  
19.  * @description  自定义的http服务器  
20.  */  
21. public class MyHttpServer {   
22.     //启动服务，监听来自客户端的请求   
23.     public static void httpserverService() throws IOException {   
24.         HttpServerProvider provider = HttpServerProvider.provider();   
25.         HttpServer httpserver =provider.createHttpServer(new InetSocketAddress(6666), 100);//监听端口6666,能同时接 受100个请求   
26.         httpserver.createContext("/myApp", new MyHttpHandler());    
27.         httpserver.setExecutor(null);   
28.         httpserver.start();   
29.         System.out.println("server started");   
30.     }   
31.     //Http请求处理类   
32.     static class MyHttpHandler implements HttpHandler {   
33.         public void handle(HttpExchange httpExchange) throws IOException {   
34.             String responseMsg = "ok";   //响应信息   
35.             InputStream in = httpExchange.getRequestBody(); //获得输入流   
36.             BufferedReader reader = new BufferedReader(new InputStreamReader(in));   
37.             String temp = null;   
38.             while((temp = reader.readLine()) != null) {   
39.                 System.out.println("client request:"+temp);   
40.             }   
41.             httpExchange.sendResponseHeaders(200, responseMsg.length()); //设置响应头属性及响应信息的长度   
42.             OutputStream out = httpExchange.getResponseBody();  //获得输出流   
43.             out.write(responseMsg.getBytes());   
44.             out.flush();   
45.             httpExchange.close();                                  
46.                
47.         }   
48.     }   
49.     public static void main(String[] args) throws IOException {   
50.         httpserverService();   
51.     }   
52. }  

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

1. package com.tdt.server.test;   
2.   
3. import java.io.BufferedReader;   
4. import java.io.IOException;   
5. import java.io.InputStream;   
6. import java.io.InputStreamReader;   
7. import java.io.OutputStream;   
8. import java.net.HttpURLConnection;   
9. import java.net.URL;   
10. import java.util.concurrent.ExecutorService;   
11. import java.util.concurrent.Executors;   
12.   
13. /**  
14.  * @project SimpleHttpServer  
15.  * @author sunnylocus  
16.  * @vresion 1.0 2009-9-2  
17.  * @description 测试类    
18.  */  
19. public class Test {   
20.     public static void main(String[] args) {   
21.         ExecutorService exec = Executors.newCachedThreadPool();   
22.         // 测试并发对MyHttpServer的影响   
23.         for (int i = 0; i < 20; i++) {   
24.             Runnable run = new Runnable() {   
25.                 public void run() {   
26.                     try {   
27.                         startWork();   
28.                     } catch (IOException e) {   
29.                         e.printStackTrace();   
30.                     }   
31.                 }   
32.             };   
33.             exec.execute(run);   
34.         }   
35.         exec.shutdown();// 关闭线程池   
36.     }   
37.   
38.     public static void startWork() throws IOException {   
39.         URL url = new URL("http://127.0.0.1:6666/myApp");   
40.         HttpURLConnection urlConn = (HttpURLConnection) url.openConnection();   
41.         urlConn.setDoOutput(true);   
42.         urlConn.setDoInput(true);   
43.         urlConn.setRequestMethod("POST");   
44.         // 测试内容包   
45.         String teststr = "this is a test message";   
46.         OutputStream out = urlConn.getOutputStream();   
47.         out.write(teststr.getBytes());   
48.         out.flush();   
49.         while (urlConn.getContentLength() != -1) {   
50.             if (urlConn.getResponseCode() == 200) {   
51.                 InputStream in = urlConn.getInputStream();   
52.                 BufferedReader reader = new BufferedReader(new InputStreamReader(in));   
53.                 String temp = "";   
54.                 while ((temp = reader.readLine()) != null) {   
55.                     System.err.println("server response:" + temp);// 打印收到的信息   
56.                 }   
57.                 reader.close();   
58.                 in.close();   
59.                 urlConn.disconnect();   
60.             }   
61.         }   
62.     }   
63. }  

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);