如何使用java代码发送https请求

您可以使用Java的HttpsURLConnection类来发送HTTPS请求。以下是一个简单的示例代码：

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.URL;
import java.net.URLConnection;

import javax.net.ssl.HttpsURLConnection;

public class HttpsURLConnectionExample {

    public static void main(String[] args) {
        try {
            String url = "https://www.example.com";
            URL obj = new URL(url);
            HttpsURLConnection con = (HttpsURLConnection) obj.openConnection();

            // 可选：设置请求头
            con.setRequestMethod("GET");
            con.setRequestProperty("User-Agent", "Mozilla/5.0");

            // 可选：设置代理
            System.setProperty("https.proxyHost", "proxy.example.com");
            System.setProperty("https.proxyPort", "8080");

            BufferedReader in = new BufferedReader(new InputStreamReader(con.getInputStream()));
            String inputLine;
            StringBuffer response = new StringBuffer();

            while ((inputLine = in.readLine()) != null) {
                response.append(inputLine);
            }
            in.close();

            // 打印响应结果
            System.out.println(response.toString());

        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}