Socket之TCP通信

简要笔记，后看

实现的是多线程的通信

服务器

public class Server {

	public static void main(String[] args) {
		
		
		try {
			//创建ServerSocket实例
			ServerSocket serverSocket=new ServerSocket(3444);
			Socket socket=null;
			//监听，直到有客户端的请求，将其赋给Socket
			while(true){
				socket=serverSocket.accept();
				//开启一个线程去接待客户端传来的socket
				new ServerThread(socket).start();
			}
			
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		
	}
}

服务器线程类

public class ServerThread extends Thread{

	private Socket socket=null;
	private static int count=0;
	public ServerThread(Socket socket) {
		// TODO Auto-generated constructor stub
		this.socket=socket;
	}
	
	@Override
	public void run() {
		// TODO Auto-generated method stub
		super.run();
		//从客户端获取的socket对象的获得输入的信息
		InputStream in=null;
		InputStreamReader inr=null;
		BufferedReader br=null;
		OutputStream os=null;
		PrintWriter pw=null;
		try {
			in = socket.getInputStream();
			//字节流转字符流
			inr=new InputStreamReader(in);
	    	//缓存
	    	br=new BufferedReader(inr);
	    	String string;
	    	while((string=br.readLine())!=null){
	    		System.out.println("客户端——>服务器："+string);
	    	}
	    	//当在获取输出流之前，一定要关闭输入流，反之亦然，不然会报错，
	    	socket.shutdownInput();
	    	
	    	os=socket.getOutputStream();
	    	pw=new PrintWriter(os);
	    	synchronized ("123") {
				pw.write("Welcome!"+"你是第"+(++count)+"个用户");
			}
	    	pw.flush();
	//    	Thread.sleep(3000);
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}finally {
			
	    	try {
	    		//关闭socket的输入流
		//		
				socket.shutdownOutput();
				//关闭其他流
        		br.close();
        		inr.close();
        		in.close();
        		pw.close();
        		os.close();
        		//关闭socket
        		socket.close();
			} catch (IOException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
	    	
		}
		
		
		
	}
}

客户端类

public class Client {

	public static void main(String[] args) {
		
		
		try {
			//新建socket类，相当于向服务器发送请求
			Socket socket=new Socket("localhost", 3444);
			//获取socket的输出流
			OutputStream os=socket.getOutputStream();
			//将字节输出流转化为打印流
			PrintWriter pw=new PrintWriter(os);
			//写入
			pw.write("登入名：adlkl；密码：sdsd4");
			pw.flush();
			
	/*
	 * 对于socket而言，在使用输出流时，要关闭输入流，反之同理
	 * 对于其他流，最好是写在最后
	 */
			socket.shutdownOutput();
			
			InputStream is=socket.getInputStream();
			BufferedReader br=new BufferedReader(
					new InputStreamReader(is));
			String string=null;
			while((string=br.readLine())!=null){
				System.out.println("服务器——>客户端"+string);
			}
			socket.shutdownInput();
			//关闭操作
			pw.close();
			os.close();
			
			socket.close();
			
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
			System.out.println("hjhjhj");
		}
		
	}
}