Java基础知识强化之网络编程笔记14：TCP之多个客户端上传到一个服务器的思考（多线程改进）

 1 package cn.itcast_15;
 2 
 3 import java.io.BufferedReader;
 4 import java.io.BufferedWriter;
 5 import java.io.FileWriter;
 6 import java.io.IOException;
 7 import java.io.InputStreamReader;
 8 import java.io.OutputStreamWriter;
 9 import java.net.Socket;
10 
11 public class UserThread implements Runnable {
12     private Socket s;
13 
14     public UserThread(Socket s) {
15         this.s = s;
16     }
17 
18     @Override
19     public void run() {
20         try {
21             // 封装通道内的流
22             BufferedReader br = new BufferedReader(new InputStreamReader(
23                     s.getInputStream()));
24             // 封装文本文件
25             // BufferedWriter bw = new BufferedWriter(new
26             // FileWriter("Copy.java"));
27 
28             // 为了防止名称冲突
29             String newName = System.currentTimeMillis() + ".java";
30             BufferedWriter bw = new BufferedWriter(new FileWriter(newName));
31 
32             String line = null;
33             while ((line = br.readLine()) != null) { // 阻塞
34                 bw.write(line);
35                 bw.newLine();
36                 bw.flush();
37             }
38 
39             // 给出反馈
40             BufferedWriter bwServer = new BufferedWriter(
41                     new OutputStreamWriter(s.getOutputStream()));
42             bwServer.write("文件上传成功");
43             bwServer.newLine();
44             bwServer.flush();
45 
46             // 释放资源
47             bw.close();
48             s.close();
49         } catch (IOException e) {
50             e.printStackTrace();
51         }
52     }
53 
54 }

 1 package cn.itcast_15;
 2 
 3 import java.io.BufferedReader;
 4 import java.io.BufferedWriter;
 5 import java.io.FileReader;
 6 import java.io.IOException;
 7 import java.io.InputStreamReader;
 8 import java.io.OutputStreamWriter;
 9 import java.net.Socket;
10 
11 public class UploadClient {
12     public static void main(String[] args) throws IOException {
13         // 创建客户端Socket对象
14         Socket s = new Socket("192.168.12.92", 11111);
15 
16         // 封装文本文件
17         // BufferedReader br = new BufferedReader(new FileReader(
18         // "InetAddressDemo.java"));
19         BufferedReader br = new BufferedReader(new FileReader(
20                 "ReceiveDemo.java"));
21         // 封装通道内流
22         BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(
23                 s.getOutputStream()));
24 
25         String line = null;
26         while ((line = br.readLine()) != null) { // 阻塞
27             bw.write(line);
28             bw.newLine();
29             bw.flush();
30         }
31 
32         // Socket提供了一个终止，它会通知服务器你别等了，我没有数据过来了
33         s.shutdownOutput();
34 
35         // 接收反馈
36         BufferedReader brClient = new BufferedReader(new InputStreamReader(
37                 s.getInputStream()));
38         String client = brClient.readLine(); // 阻塞
39         System.out.println(client);
40 
41         // 释放资源
42         br.close();
43         s.close();
44     }
45 }

 1 package cn.itcast_15;
 2 
 3 import java.io.IOException;
 4 import java.net.ServerSocket;
 5 import java.net.Socket;
 6 
 7 public class UploadServer {
 8     public static void main(String[] args) throws IOException {
 9         // 创建服务器Socket对象
10         ServerSocket ss = new ServerSocket(11111);
11 
12         while (true) {
13             Socket s = ss.accept();
14             new Thread(new UserThread(s)).start();
15         }
16     }
17 }