网络编程难题：Java HTTP客户端和服务器端交互案例-蒲公英云

网络编程难题：Java HTTP客户端和服务器端交互案例

原创痛定思痛。 2024-12-08 06:15 119阅读 0赞

在Java中，实现HTTP客户端和服务器端的交互涉及到Socket编程和HttpURLConnection等技术。以下是一个简单的例子，展示如何创建一个HTTP客户端向服务器发送GET请求。

客户端（使用Java的HttpURLConnection）：

import java.io.BufferedReader;
import java.io.InputStreamReader;
import javax.net.ssl.HttpsURLConnection;
public class HttpClient {
    public static void main(String[] args) throws Exception {
        // 创建HTTPS连接
        HttpsURLConnection httpsConn = (HttpsURLConnection) 
                new URL("https://example.com").openConnection();
        // 设置请求方法为GET
        httpsConn.setRequestMethod("GET");
        // 获取并打印响应
        int responseCode = httpsConn.getResponseCode();
        System.out.println("Response Code : " + responseCode);
        BufferedReader in = new BufferedReader(new InputStreamReader(httpsConn.getInputStream()))); 
        String inputLine;
        StringBuffer content = new StringBuffer(); 
        while ((inputLine = in.readLine()) != null)) {
            content.append(inputLine);
        }
        in.close();
        System.out.println("Response Body : " + content.toString());
    }
}

服务器端（使用Java的HttpServer）：

import java.io.IOException;
import java.net.ServerSocket;
import java.net.Socket;
public class HttpServer {
    public static void main(String[] args) throws IOException {
        // 创建服务器监听端口
        ServerSocket serverSocket = new ServerSocket(8000); 
        System.out.println("Http Server is running on port 8000...");
        // 等待客户端连接
        Socket clientSocket = serverSocket.accept();
        System.out.println("Received connection from " + clientSocket.getInetAddress().getHostAddress());
        // 客户端发送请求，这里以GET为例
        BufferedReader inFromClientSocket = new BufferedReader(new InputStreamReader(clientSocket.getInputStream()))); 
        String inputLine;
        StringBuffer content = new StringBuffer(); 
        while ((inputLine = inFromClientSocket.readLine()) != null)) {
            content.append(inputLine);
        }
        // 向客户端发送响应
        clientSocket.getOutputStream().write(content.toString());
        clientSocket.close();
        serverSocket.close();
    }
}