模拟Http协议

HttpClient类是一个简单的HTTP客户端程序，它已GET方式向HTTP服务器发送HTTP请求

package com.http;

import java.io.IOException;
import java.io.OutputStream;
import java.net.Socket;

public class HTTPClient {
	public static void main(String[] args) {
		String uri="index.htm";//请求HTTP的请求uri
		if(args.length!=0)uri=args[0];
		doGet("localhost",8080,uri);   //按照GET请求方式访问HTTPServer
	}

	private static void doGet(String host, int port, String uri) {
		// TODO Auto-generated method stub
		Socket socket=null;
		try{
			socket=new Socket(host,port);          //与HTTPserver建立TCP连接
			StringBuffer sb=new StringBuffer("GET"+uri+" HTTP/1.1\r\n");//HTTP请求的一行

 //发送HTTP请求

			OutputStream socketOut=socket.getOutputStream();
			socketOut.write(sb.toString().getBytes());

                       //接收服务器响应的结果
			
		}catch (Exception e) {
			// TODO: handle exception
			e.printStackTrace();
		}finally{
			try {
				socket.close();
			} catch (IOException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}
		
	}

}

package com.http;


import java.io.InputStream;
import java.net.ServerSocket;
import java.net.Socket;
import java.security.Provider.Service;


public class HTTPServer {
	
	public static void main(String[] args) {
		int port;
		ServerSocket serverSocket;
		
		try{
			port=Integer.parseInt(args[0]);
			
			
		}catch (Exception e) {
			// TODO: handle exception
			System.out.println("port=8080(默认)");
			port=8080;
		}
		
		try{
			serverSocket=new ServerSocket(port);
			System.out.println("服务器正在监听端口："+serverSocket.getLocalPort());
			while(true){
				try{
					final Socket socket=serverSocket.accept();
					System.out.println("服务器正在建立一个新的tcp链接，该客户的地址为：" +
							socket.getInetAddress()+":"+socket.getPort());
					service(socket);
					
					
				}catch (Exception e) {
					// TODO: handle exception
				}
				
			}
		}catch (Exception e) {
			// TODO: handle exception
		}
		
	}


	private static void service(Socket socket)throws Exception {
		// TODO Auto-generated method stub
		//读取Http请求信息
		InputStream socketIn=socket.getInputStream();
		Thread.sleep(500);
		int size=socketIn.available();
		byte[] buffer=new byte[size];
		socketIn.read(buffer);
		String request=new String(buffer);
		System.out.println(request);
		
	}


}