用Java实现简单的HTTP服务器

原创桃扇骨 2024-10-16 10:21 48阅读 0赞

在Java中，我们可以使用内置的`ServerSocket`和`Socket`类来实现一个简单的HTTP服务器。以下是一个基础的例子：

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

public class SimpleHttpServer {
    private static final int PORT = 8000; // Change this to your preferred port

public static void main(String[] args) throws IOException {
        ServerSocket serverSocket = new ServerSocket(PORT);
        System.out.println("HTTP Server is listening on port " + PORT);

while (true) { // Loop indefinitely to handle incoming connections
            Socket clientSocket = serverSocket.accept(); // Accept a new connection

try (OutputStream outputStream = clientSocket.getOutputStream();
                     InputStream inputStream = clientSocket.getInputStream()) {

String requestLine = "GET /index.html HTTP/1.1"; // Change this to your desired request line
                byte[] requestBytes = requestLine.getBytes(StandardCharsets.UTF_8)); // Convert to bytes

// Send response to client socket
                outputStream.write(requestBytes);
                outputStream.flush();

// Read and print server's response to console
                String responseLine = "HTTP/1.1 200 OK";
                byte[] responseBytes = responseLine.getBytes(StandardCharsets.UTF_8));
                inputStream.read(responseBytes);
                System.out.println(new String(responseBytes)));

} catch (IOException e) {
                System.err.println("Error occurred: " + e.getMessage());
            }
        }
    }
}
```

这个程序会创建一个HTTP服务器，监听指定端口（这里设置为8000，你可以根据需要更改）。当有客户端连接时，它将接收到的请求转化为字节流，并发送响应。同时，服务器会打印出收到的客户端响应。