用Java socket （TCP通信模型）实现一个简单的web 服务器

package cn.magicdu.think.socket;

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

/**
 * Http 处理线程
 * @author xiaoduc
 *
 */
public class HttpThread extends Thread {
    
    private Socket socket;//连接点
    
    public HttpThread(Socket socket) {
        super();
        this.socket=socket;
    }
    
    @Override
    public void run() {
        try {
            OutputStream os=socket.getOutputStream();//获得输出流
            PrintWriter pw=new PrintWriter(os);//创建PrintWriter 对象
            //往输出流写入内容
            pw.println("<html>");
            pw.println("<body>");
            pw.println("hello it's me!!");
            pw.println("</body>");
            pw.println("</html>");
            pw.flush();//清空缓存
            pw.close();//关闭输出流
            socket.close();//关闭socket
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

package cn.magicdu.think.socket;

import java.net.ServerSocket;
import java.net.Socket;

/**
 * web 服务端
 * @author xiaoduc
 *
 */
public class WebServer {
    
    public static void main(String[] args) throws Exception{
        //用端口号创建一个ServerSocket对象，监听8081端口
        ServerSocket ss=new ServerSocket(8081);
        //开始循环监听来自客户端的请求
        Socket s=null;
        while((s=ss.accept())!=null){
            new HttpThread(s).start(); //开始一个新的线程
        }
        ss.close();
    }
}

运行结果：在浏览器输入 http:// localhost:8081