udp,tcp对于socket的写法

1.udp的简述

UDP协议提供的服务不同于TCP协议的端到端服务，它是面向非连接的，属不可靠协议，UDP套接字在使用前不需要进行连接。

2.客户端代码，

DatagramSocket ds=new DatagramSocket(1086);                                                                                

    byte[] bys = new byte[1024];
    int len = bys.length;
    DatagramPacket dp = new DatagramPacket(bys, len);

    ds.receive(dp);

    byte[] by = dp.getData();
    int length = dp.getLength();

    InetAddress address = dp.getAddress();
    String ip = address.getHostAddress();

    String s = new String(by, 0, length);
    System.out.println(ip + "---" + s);

ds.close();

3.服务端代码

DatagramSocket ds=new DatagramSocket();
		BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
		String line=null;
		byte [] bys=line.getBytes();
		int num=bys.length;

		InetAddress address=InetAddress.getByName("172.19.106.2");

		int port=1086;
		DatagramPacket dp=new DatagramPacket(bys,num, address,port);

		ds.send(dp);		
		ds.close();

　

2.tcp的简述

CP协议提供面向连接的服务，通过它建立的是可靠地连接。

客户端

//1.创建对象
        ServerSocket sk=new ServerSocket(11111);
        //2.监听
        Socket s=sk.accept();
        //打包数据
        BufferedReader br=new BufferedReader(new InputStreamReader(s.getInputStream()));    
        BufferedReader bw=new BufferedReader(new InputStreamReader(System.in));
        OutputStream os=s.getOutputStream();
        String line=null;
        while((line=br.readLine())!=null){
            System.out.println("Client 	"+line);        
            
            os.write(bw.readLine().getBytes());
        }            
        //释放资源
        s.close();
        //sk.close();

服务端

Socket sk=new Socket("192.168.60.218",11111);
        BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
        BufferedWriter bw=new BufferedWriter(new OutputStreamWriter(sk.getOutputStream()));
        String line=null;
        while((line=br.readLine())!=null){            
            bw.write(line);
            bw.newLine();
            bw.flush();
            
            InputStream is=sk.getInputStream();            
            byte [] by=new byte[1024];
            int num=is.read(by);
            String h=new String(by, 0, num);
            System.out.println("Service:	"+h);
        }                    
            //br.close();
            //bw.close();
            sk.close();

后面还有呢，，，