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：

 1 package cn.itcast_13;
 2 
 3 import java.io.BufferedInputStream;
 4 import java.io.BufferedOutputStream;
 5 import java.io.FileInputStream;
 6 import java.io.IOException;
 7 import java.io.InputStream;
 8 import java.net.Socket;
 9 
10 public class UploadClient {
11     public static void main(String[] args) throws IOException {
12         // 创建客户端Socket对象
13         Socket s = new Socket("192.168.12.92", 19191);
14 
15         // 封装图片文件
16         BufferedInputStream bis = new BufferedInputStream(new FileInputStream(
17                 "林青霞.jpg"));
18         // 封装通道内的流
19         BufferedOutputStream bos = new BufferedOutputStream(s.getOutputStream());
20 
21         byte[] bys = new byte[1024];
22         int len = 0;
23         while ((len = bis.read(bys)) != -1) {
24             bos.write(bys, 0, len);
25             bos.flush();
26         }
27         
28         s.shutdownOutput();
29 
30         // 读取反馈
31         InputStream is = s.getInputStream();
32         byte[] bys2 = new byte[1024];
33         int len2 = is.read(bys2);
34         String client = new String(bys2, 0, len2);
35         System.out.println(client);
36 
37         // 释放资源
38         bis.close();
39         s.close();
40     }
41 }

（2）服务端：

 1 package cn.itcast_13;
 2 
 3 import java.io.BufferedInputStream;
 4 import java.io.BufferedOutputStream;
 5 import java.io.FileOutputStream;
 6 import java.io.IOException;
 7 import java.io.OutputStream;
 8 import java.net.ServerSocket;
 9 import java.net.Socket;
10 
11 public class UploadServer {
12     public static void main(String[] args) throws IOException {
13         // 创建服务器Socket对象
14         ServerSocket ss = new ServerSocket(19191);
15 
16         // 监听客户端连接
17         Socket s = ss.accept();
18 
19         // 封装通道内流
20         BufferedInputStream bis = new BufferedInputStream(s.getInputStream());
21         // 封装图片文件
22         BufferedOutputStream bos = new BufferedOutputStream(
23                 new FileOutputStream("mn.jpg"));
24 
25         byte[] bys = new byte[1024];
26         int len = 0;
27         while ((len = bis.read(bys)) != -1) {
28             bos.write(bys, 0, len);
29             bos.flush();
30         }
31 
32         // 给一个反馈
33         OutputStream os = s.getOutputStream();
34         os.write("图片上传成功".getBytes());
35 
36         bos.close();
37         s.close();
38     }
39 }