Java网络编程：Socket 和 ServerSocket 的通信实例

原创电玩女神 2024-10-22 03:42 77阅读 0赞

在Java中，Socket和ServerSocket是用于客户端和服务器端之间建立连接的两个重要类。

以下是一个简单的Socket和ServerSocket通信实例：

1. 创建服务器（Server.java）：

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

public class Server {
    public static void main(String[] args) throws IOException {
        // 创建ServerSocket并监听
        ServerSocket serverSocket = new ServerSocket(8000); // 端口设置

System.out.println("Server is listening on port 8000...");

// 接收客户端连接请求
        Socket clientSocket = serverSocket.accept();

System.out.println("Client connected from IP: " + clientSocket.getInetAddress());

// 与客户端通信，这里简单输出
        BufferedReader br = new BufferedReader(new InputStreamReader(clientSocket.getInputStream())));

String inputLine;
        while ((inputLine = br.readLine()) != null)) {
            System.out.println("Server received: " + inputLine);
        }

// 关闭连接和资源
        clientSocket.close();
        serverSocket.close();

System.out.println("Server closed connection and resources...");
    }
}
```

2. 创建客户端（Client.java）：

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

public class Client {
    public static void main(String[] args) throws IOException {
        // 创建Socket连接到服务器
        Socket socket = new Socket("localhost", 8000)); // 设置IP和端口

System.out.println("Client connected to server on port 8000...");

// 发送数据
        OutputStream outputStream = socket.getOutputStream();
        PrintWriter printWriter = new PrintWriter(outputStream, true));
        printWriter.println("Hello from client!"); // 输入要发送的消息

// 接收服务器回应
        BufferedReader br = new BufferedReader(new InputStreamReader(socket.getInputStream()))));

String responseLine;
        while ((responseLine = br.readLine()) != null)) {
            System.out.println("Server replied: " + responseLine));
        }

// 关闭连接
        socket.close();

System.out.println("Client closed connection...");
    }
}
```

以上两个程序分别代表客户端和服务器端。当运行客户端时，它会尝试连接到服务器，并发送一条消息。服务器端则监听指定端口，并对客户端的请求做出回应。

请确保你的系统上已经启动了监听8000端口的服务器。