Java網路編程之tcp的socket通訊

標籤：線程   next   start   ade   arraylist   rem   nbsp   style   ip地址   

1、用戶端MyClient.java

 1 import java.io.*; 2 import java.net.*; 3  4 public class MyClient 5 { 6     public static void main(String[] args)throws Exception 7     { 8         Socket s = new Socket("192.168.1.1" , 30000); 9         // 用戶端啟動ClientThread線程不斷讀取來自伺服器的資料10         new Thread(new ClientThread(s)).start();11         // 擷取該Socket對應的輸出資料流12         PrintStream ps = new PrintStream(s.getOutputStream());13         String line = null;14         // 不斷讀取鍵盤輸入15         BufferedReader br = new BufferedReader(16             new InputStreamReader(System.in));17         while ((line = br.readLine()) != null)18         {19             // 將使用者的鍵盤輸入內容寫入Socket對應的輸出資料流20             ps.println(line);21         }22     }23 }

2、加入多線程，ClientThread.java

 1 import java.io.*; 2 import java.net.*; 3  4 public class ClientThread implements Runnable 5 { 6     // 該線程負責處理的Socket 7     private Socket s; 8     // 該線程所處理的Socket所對應的輸入資料流 9     BufferedReader br = null;10     public ClientThread(Socket s)11         throws IOException12     {13         this.s = s;14         br = new BufferedReader(15             new InputStreamReader(s.getInputStream()));16     }17     public void run()18     {19         try20         {21             String content = null;22             // 不斷讀取Socket輸入資料流中的內容，並將這些內容列印輸出23             while ((content = br.readLine()) != null)24             {25                 System.out.println(content);26             }27         }28         catch (Exception e)29         {30             e.printStackTrace();31         }32     }33 }

 

3、伺服器端MyServer.java

 1 import java.net.*; 2 import java.io.*; 3 import java.util.*; 4  5 public class MyServer 6 { 7     // 定義儲存所有Socket的ArrayList 8     public static ArrayList<Socket> socketList 9         = new ArrayList<Socket>();10     public static void main(String[] args)11         throws IOException12     {13 System.out.println("222222……");14         ServerSocket ss = new ServerSocket15 16 (30000);17         while(true)18         {19 System.out.println("伺服器等待連結……");20             // 此行代碼會阻塞，將一直等待別人的串連21             Socket s = ss.accept();22             socketList.add(s);23             // 每當用戶端串連後啟動一條ServerThread線程為該用戶端服務24             new Thread(new ServerThread25 26 (s)).start();27         }28     }29 }

 

4、為伺服器端通訊加入多線程

 1 import java.io.*; 2 import java.net.*; 3 import java.util.*; 4  5 // 負責處理每個線程通訊的線程類 6 public class ServerThread implements Runnable { 7     // 定義當前線程所處理的Socket 8     Socket s = null; 9     // 該線程所處理的Socket所對應的輸入資料流10     BufferedReader br = null;11 12     public ServerThread(Socket s) throws IOException {13         System.out.println("4444444……");14         this.s = s;15         // 初始化該Socket對應的輸入資料流16     String ip=s.getInetAddress().getHostAddress();17         System.out.println("ip地址為"+ip+"........connected!!!");18         br = new BufferedReader(new InputStreamReader(s.getInputStream(),19                 "utf-8")); // 20     }21 22     public void run() {23         System.out.println("555555……");24         try {25             System.out.println("4444444……");26             String content = null;27             // 採用迴圈不斷從Socket中讀取用戶端發送過來的資料28             while ((content = readFromClient()) != null) {29                 /*System.out.println("---"30                         + Arrays.toString(content.getBytes("utf-8")));*/31                 System.out.println("---" +"用戶端發來的資料為"+content);32                 System.out.println("===============");33                 // 遍曆socketList中的每個Socket，34                 // 將讀到的內容向每個Socket發送一次35                 for (Iterator<Socket> it = MyServer.socketList.iterator(); it36                         .hasNext();) {37                     Socket s = it.next();38                     try {39                         System.out.println("666666");40                         OutputStream os = s.getOutputStream();41                         os.write((content+"伺服器反饋給用戶端ok" + "\n").getBytes("utf-8"));42                         System.out.println("777777");43                     } catch (SocketException e) {44                         e.printStackTrace();45                         // 刪除該Socket。46                         it.remove();47                         System.out.println(MyServer.socketList);48                     }49                 }50             }51         } catch (IOException e) {52             e.printStackTrace();53         }54     }55 56     // 定義讀取用戶端資料的方法57     private String readFromClient() {58         try {59             return br.readLine();60         }61         // 如果捕捉到異常，表明該Socket對應的用戶端已經關閉62         catch (IOException e) {63             e.printStackTrace();64             System.out.println("用戶端已經關閉！！！");65             // 刪除該Socket。66             MyServer.socketList.remove(s); 67         }68         return null;69     }70 }

 

Java網路編程之tcp的socket通訊