Java网络编程：TCP服务器和客户端通信实例

原创 r囧r小猫 2024-12-06 23:54 23阅读 0赞

在Java中，我们可以使用Socket API来实现TCP服务器和客户端的通信。以下是一个简单的例子：

**客户端（Client.java）**

```java
import java.io.*;
import java.net.*;

public class Client {
    public static void main(String[] args) {
        try (Socket socket = new Socket("localhost", 1234)); // Connect to the server

BufferedReader in = new BufferedReader(new InputStreamReader(socket.getInputStream()))); // Read from the server
        String inputLine;
        while ((inputLine = in.readLine()) != null)) { // Send messages back to the server
            System.out.println(inputLine);
        }

socket.close(); // Close the connection
    }
}
```

**服务器（Server.java）**

```java
import java.io.*;
import java.net.*;

public class Server {
    public static void main(String[] args) throws IOException {
        ServerSocket server = new ServerSocket(1234)); // Listen for incoming connections

System.out.println("Server is running on port 1234...");

while (true) { // Accept and process client connections
            Socket socket = server.accept(); // Wait until a connection is made

Thread clientThread = new Thread(() -> handleClient(socket))); // Create a new thread for each client
            clientThread.start();
        }
    }

private static void handleClient(Socket socket) throws IOException {
        BufferedReader in = new BufferedReader(new InputStreamReader(socket.getInputStream()))); // Read from the client

System.out.println("New connection from: " + socket.getRemoteSocketAddress()));

String inputLine;
        while ((inputLine = in.readLine()) != null)) { // Send messages back to the client
            System.out.println(inputLine);
        }

socket.close(); // Close the connection
    }
}
```

这个例子中，客户端首先连接到服务器的1234端口。然后客户端和服务器之间通过`readLine()`方法进行通信，客户端可以发送消息给服务器，服务器也可以响应信息给客户端。

最后，当客户端完成所有通信后，它会关闭与服务器的连接。