Java-Socket編程實現簡易聊天室（TCP），供大家參考，具體內容如下

實現一個服務器接收多個客戶端

測試：

首先啟動服務器，然后啟動三個客戶端，輸入三個不同的用戶名，分別在聊天室發消息
看其他客戶端是否能接收到消息

效果如下圖：

一號發消息

可以在二號和三號客戶端接收到消息

服務器設計

1. import java.io.BufferedReader;
2. import java.io.IOException;
3. import java.io.InputStreamReader;
4. import java.io.PrintWriter;
5. import java.net.ServerSocket;
6. import java.net.Socket;
7. import java.util.ArrayList;
8. import java.util.List;
9. import java.util.concurrent.ExecutorService;
10. import java.util.concurrent.Executors;
11.  
12. public class Server1 {
13.  
14. static public List<Client> list = new ArrayList<Client>();
15.  
16. static ExecutorService cachedThreadPool = Executors.newCachedThreadPool();
17.  
18. public static void main(String[] args) {
19. //創建一個ServerSocket監聽端口
20. try (ServerSocket server = new ServerSocket(5678)) {
21.  
22. while (true) { // 利用死循環不停的監聽端口
23.  
24. Socket s = server.accept();// 利用Socket服務器的accept()方法獲取客戶端Socket對象。
25. addClient(s);
26.  
27. }
28.  
29. } catch (IOException e) {
30. e.printStackTrace();
31. }
32. }
33.  
34. // 添加客戶端
35. private static void addClient(Socket s) {
36. String name;
37.  
38. try {
39. BufferedReader in = new BufferedReader(new InputStreamReader(s.getInputStream()));
40. name = in.readLine();
41. Client c = new Client(name, s);// 創建客戶端處理線程對象
42. System.out.println(name);
43. list.add(c);
44.  
45. cachedThreadPool.execute(c);
46.  
47. } catch (IOException e) {
48. e.printStackTrace();
49. }
50. }
51.  
52. static class Client implements Runnable {
53.  
54. String name; // 客戶端名字
55. Socket s = null; // 保存客戶端Socket對象
56.  
57. BufferedReader in;
58. PrintWriter out;
59.  
60. Client(String name, Socket s) {
61.  
62. this.s = s;
63. this.name = name;
64.  
65. try {
66. in = new BufferedReader(new InputStreamReader(s.getInputStream()));
67. out = new PrintWriter(s.getOutputStream());
68. } catch (IOException e) {
69. // TODO Auto-generated catch block
70. e.printStackTrace();
71. }
72. }
73.  
74. @Override
75. public void run() {
76. try {
77. while (true) {
78. String str = in.readLine();
79. for (int j = 0; j < list.size(); j++) {
80. Server1.Client c = list.get(j);
81. if (c != this) {
82. System.out.println(str);
83. c.send(str+"-|1|2|-"+name);
84. }
85. }
86.  
87. if (str.equals("end"))
88. break;
89. }
90.  
91. try {
92. s.close();
93. } catch (IOException e) {
94. // TODO Auto-generated catch block
95. e.printStackTrace();
96. }
97. } catch (IOException e1) {
98. // TODO Auto-generated catch block
99. e1.printStackTrace();
100. }
101. }
102.  
103. public void send(String str) throws IOException {
104. out.println(str);
105. out.flush();
106. }
107. }
108. }

客戶端設計

1. import java.io.BufferedReader;
2. import java.io.IOException;
3. import java.io.InputStreamReader;
4. import java.io.PrintWriter;
5. import java.net.Socket;
6. import java.util.Scanner;
7.  
8. public class Client1 {
9. public static String name = null;
10. static Socket socket = null;
11.  
12. static BufferedReader in;
13. static PrintWriter out;
14.  
15. public static void main(String[] args) {
16. Scanner sc = new Scanner(System.in);
17.  
18. System.out.print("輸入用戶名:>");
19. name = sc.nextLine();
20.  
21. try {
22. // socket = new Socket("116.62.173.212", 5678);
23. socket = new Socket("127.0.0.1", 5678);
24.  
25. System.out.println(socket);
26.  
27. System.out.println("已連接服務器>");
28.  
29. out = new PrintWriter(socket.getOutputStream());
30. in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
31.  
32. Thread receive = new Thread(new receiveThread());
33. receive.start();
34.  
35. out.println(name);
36. out.flush();
37.  
38. String msg;
39.  
40. while (true) {
41. // System.out.print("你說:>");
42. msg = sc.nextLine();
43.  
44. out.println(msg);
45. out.flush();
46.  
47. if (msg.equalsIgnoreCase("end"))
48. break;
49. }
50.  
51. } catch (IOException e) {
52. e.printStackTrace();
53. }
54. }
55.  
56. static class receiveThread implements Runnable{
57.  
58. @Override
59. public void run() {
60. try {
61. while (socket!=null) {
62.  
63. String str = in.readLine();
64. String message = str.split("-\\|1\\|2\\|-")[0];
65. String name = str.split("-\\|1\\|2\\|-")[1];
66. System.out.println(name + ":>" + message);
67.  
68. }
69. }catch(Exception e) {
70. e.printStackTrace();
71. }
72. }
73. }
74. }

以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支持我們。

原文鏈接：https://blog.csdn.net/qq_42843894/article/details/114793283