如何使用Java访问netbeans中的json Post方法值

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

public class JSONPostExample {
    public static void main(String[] args) {
        try {
            // 创建URL对象
            URL url = new URL("http://example.com/api"); // 替换为实际的API地址

            // 创建HTTP连接
            HttpURLConnection connection = (HttpURLConnection) url.openConnection();
            connection.setRequestMethod("POST");
            connection.setRequestProperty("Content-Type", "application/json");
            connection.setDoOutput(true);

            // 发送POST请求
            String postData = "{\"key1\":\"value1\", \"key2\":\"value2\"}"; // 替换为实际的JSON数据
            connection.getOutputStream().write(postData.getBytes("UTF-8"));

            // 获取响应结果
            BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream()));
            String line;
            StringBuilder response = new StringBuilder();
            while ((line = reader.readLine()) != null) {
                response.append(line);
            }
            reader.close();

            // 输出响应结果
            System.out.println(response.toString());

            // 关闭连接
            connection.disconnect();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}