TCP文件上传demo

客户端

public static void main(String[] args) {
        Socket socket = null;
        OutputStream outputStream = null;
        FileInputStream fileInputStream = null;
        InputStream inputStream = null;
        ByteArrayOutputStream byteArrayOutputStream = null;
        try {
            //创建连接
            socket = new Socket(InetAddress.getByName("127.0.0.1"), 10001);
            //创建输出流
            outputStream = socket.getOutputStream();
            //读取文件
            fileInputStream = new FileInputStream(new File("d:\\test\\1.jpg"));
            //写出文件
            //创建Buffer
            byte[] buffer = new byte[1024];
            int read;
            while ((read = fileInputStream.read(buffer)) != -1) {
                outputStream.write(buffer, 0, read);
            }
            //通知服务端，已经传输完了
            socket.shutdownOutput();

            //确定服务端接收完毕，才能断开
            inputStream = socket.getInputStream();
            //创建管道/
            byteArrayOutputStream = new ByteArrayOutputStream();
            //创建Buffer
            byte[] bufferCheck = new byte[1024];
            int readCheck;
            while ((readCheck = inputStream.read(bufferCheck)) != -1) {
                byteArrayOutputStream.write(bufferCheck, 0, readCheck);
            }
            System.out.println(byteArrayOutputStream.toString());
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (byteArrayOutputStream != null) {
                try {
                    byteArrayOutputStream.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if (inputStream != null) {
                try {
                    inputStream.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if (fileInputStream != null) {
                try {
                    fileInputStream.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if (outputStream != null) {
                try {
                    outputStream.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if (socket != null) {
                try {
                    socket.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }

        }
    }

服务端

public static void main(String[] args) {
        ServerSocket serverSocket = null;
        Socket socket = null;
        InputStream inputStream = null;
        FileOutputStream fileOutputStream = null;
        OutputStream outputStream = null;
        try {
            serverSocket = new ServerSocket(10001);
            //加上while，服务端可以一直接收,会收不到结束通知
            //while (true){
            //阻塞式监听，会一直等待客户端连接
            socket = serverSocket.accept();
            //读取客户端消息
            inputStream = socket.getInputStream();
            //1，创建管道/
            //byteArrayOutputStream = new ByteArrayOutputStream();
            //文件输出
            fileOutputStream = new FileOutputStream(new File("d:\\test\\receive.jpg"));
            //创建Buffer
            byte[] buffer = new byte[1024];
            //读取数据到Buffer
            int read;
            while ((read = inputStream.read(buffer)) != -1) {
                fileOutputStream.write(buffer, 0, read);
            }
            //通知客户端已经接收完毕
            outputStream = socket.getOutputStream();
            outputStream.write("已经结束".getBytes());
            //}
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            //关闭
            if (fileOutputStream != null) {
                try {
                    fileOutputStream.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if (inputStream != null) {
                try {
                    inputStream.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if (outputStream != null) {
                try {
                    outputStream.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if (socket != null) {
                try {
                    socket.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            if (serverSocket != null) {
                try {
                    serverSocket.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }

        }
    }

d:\test\1.jpg 文件要存在，即可生成新的