Java-Tcp

 @Test
    public void testServer() {
        ServerSocket ss = null;
        Socket socket = null;
        InputStream is = null;
        BufferedOutputStream bos = null;

        try {
            //1.获取服务端 serverSocket ,指明端口号
            ss = new ServerSocket(9090);

            //2.获取客户端socket
            socket = ss.accept();

            //3.获取输入流
            is = socket.getInputStream();

            //4.数据操作
            File file = new File("src\\Day4_14\\老鹰copy.webp");
            //File file = new File("src\\Day4_14\\helloCopy.txt");
            FileOutputStream fos = new FileOutputStream(file);
            bos = new BufferedOutputStream(fos);
            byte[] buffer = new byte[1024];
            int len;
            while ((len = is.read(buffer)) != -1) {
                bos.write(buffer, 0, len);
                String str = new String(buffer, 0, len);
                System.out.println(str);
            }
        } catch (IOException e) {
            e.printStackTrace();
        } finally {

            //5.关流
            if (bos!=null) {

                try {
                    bos.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if (is!=null) {

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

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

                try {
                    ss.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }

  @Test   客户端
    public  void testClent()  {
        Socket socket = null;
        OutputStream os = null;
        BufferedInputStream bis = null;

        try {
            //1.创建socket ，指明Ip 端口号
            InetAddress inet = InetAddress.getByName("127.0.0.1");
            socket = new Socket(inet, 9090);

            //2.获取输出流
            os = socket.getOutputStream();

            //3.写出数据

          //  File file = new File("src\\Day4_14\\hello.txt");
            File file = new File("src\\Day4_14\\老鹰.webp");
            FileInputStream fis = new FileInputStream(file);
            bis = new BufferedInputStream(fis);
            byte[] buffer = new byte[1024];
            int len;
            while ((len = bis.read(buffer)) != -1) {
                os.write(buffer, 0, len);
                String str = new String(buffer, 0, len);
                System.out.println(str);
            }
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            //4.关流
            if (bis!=null) {

                try {
                    bis.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if (os!=null) {

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

                try {
                    socket.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }

        }


    }