TCP发送接收消息

package com.jfy.webCode01;

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

//Tcp客户端
public class TcpClient {
    public static void main(String[] args) {
        Socket socket = null;
        OutputStream OS = null;
        //获得服务端的地址
        try {
            InetAddress ServerIP = InetAddress.getByName("127.0.0.1");
            int  port = 9999;
            //创建一个socket连接
             socket = new Socket(ServerIP,port);
            //发送消息
             OS = socket.getOutputStream();
            OS.write("我好困我好困我好困我好困".getBytes());

        } catch (IOException e) {
            e.printStackTrace();
        }finally {
            if (socket != null){
                try {
                    socket.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
                if (OS!=null){
                    try {
                        OS.close();
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                }
            }
        }
    }
}

package com.jfy.webCode01;
//Tcp服务端

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.ServerSocket;
import java.net.Socket;

public class TcpServer {

    public static void main(String[] args) {
        ServerSocket serverSocket = null;
        Socket accept = null;
        InputStream IS = null;
        ByteArrayOutputStream BAOS = null;
        try {
            //服务端需要有一个地址
            serverSocket = new ServerSocket(9999);
            while (true) {
                //等待客户端连接
                accept = serverSocket.accept();
                //接受消息
                IS = accept.getInputStream();
                //管道流
                BAOS = new ByteArrayOutputStream();
                byte[] buffer = new byte[1048];
                int lenth;
                while ((lenth = IS.read(buffer)) != -1) {
                    BAOS.write(buffer, 0, lenth);
                }
                System.out.println(BAOS.toString());
            }
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if (serverSocket != null) {
                try {
                    serverSocket.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
                if (accept != null) {
                    try {
                        accept.close();
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                    if (IS != null) {
                        try {
                            IS.close();
                        } catch (IOException e) {
                            e.printStackTrace();
                        }
                        if (BAOS != null) {
                            try {
                                BAOS.close();
                            } catch (IOException e) {
                                e.printStackTrace();
                            }
                        }
                    }
                }
            }
        }
    }
}