Java基础知识强化之网络编程笔记13：TCP之TCP协议上传图片并给出反馈

1. TCP协议上传图片并给出反馈：

（1）客户端：

 package cn.itcast_13;

 import java.io.BufferedInputStream;

 import java.io.BufferedOutputStream;

 import java.io.FileInputStream;

 import java.io.IOException;

 import java.io.InputStream;

 import java.net.Socket;

 public class UploadClient {

     public static void main(String[] args) throws IOException {

         // 创建客户端Socket对象

         Socket s = new Socket("192.168.12.92", 19191);

         // 封装图片文件

         BufferedInputStream bis = new BufferedInputStream(new FileInputStream(

                 "林青霞.jpg"));

         // 封装通道内的流

         BufferedOutputStream bos = new BufferedOutputStream(s.getOutputStream());

         byte[] bys = new byte[1024];

         int len = 0;

         while ((len = bis.read(bys)) != -1) {

             bos.write(bys, 0, len);

             bos.flush();

         }

         s.shutdownOutput();

         // 读取反馈

         InputStream is = s.getInputStream();

         byte[] bys2 = new byte[1024];

         int len2 = is.read(bys2);

         String client = new String(bys2, 0, len2);

         System.out.println(client);

         // 释放资源

         bis.close();

         s.close();

     }

 }

（2）服务端：

 package cn.itcast_13;

 import java.io.BufferedInputStream;

 import java.io.BufferedOutputStream;

 import java.io.FileOutputStream;

 import java.io.IOException;

 import java.io.OutputStream;

 import java.net.ServerSocket;

 import java.net.Socket;

 public class UploadServer {

     public static void main(String[] args) throws IOException {

         // 创建服务器Socket对象

         ServerSocket ss = new ServerSocket(19191);

         // 监听客户端连接

         Socket s = ss.accept();

         // 封装通道内流

         BufferedInputStream bis = new BufferedInputStream(s.getInputStream());

         // 封装图片文件

         BufferedOutputStream bos = new BufferedOutputStream(

                 new FileOutputStream("mn.jpg"));

         byte[] bys = new byte[1024];

         int len = 0;

         while ((len = bis.read(bys)) != -1) {

             bos.write(bys, 0, len);

             bos.flush();

         }

         // 给一个反馈

         OutputStream os = s.getOutputStream();

         os.write("图片上传成功".getBytes());

         bos.close();

         s.close();

     }

 }