java 发送https post请求

Java发送HTTPS POST请求可以使用java.net.URLConnection和javax.net.ssl.HttpsURLConnection类。具体代码示例如下：

import java.io.*;
import java.net.*;
import javax.net.ssl.HttpsURLConnection;

public class HttpsPost {
    public static void main(String[] args) throws Exception {
        // create the connection
        URL url = new URL("https://example.com");
        HttpsURLConnection conn = (HttpsURLConnection) url.openConnection();
        conn.setRequestMethod("POST");
        conn.setDoOutput(true);

        // send the request
        DataOutputStream out = new DataOutputStream(conn.getOutputStream());
        out.writeBytes("key1=value1&key2=value2");
        out.flush();
        out.close();

        // read the response
        InputStream in = conn.getInputStream();
        BufferedReader reader = new BufferedReader(new InputStreamReader(in));
        String line;
        while ((line = reader.readLine()) != null) {
            System.out.println(line);
        }
        reader.close();
    }
}

注意：如果请求的网站是需要证书认证的，还需要额外处理证书。