使用Okhttp3的OPTIONS/HEAD REST API请求

import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.Response;

public class Main {
    public static void main(String[] args) {
        OkHttpClient client = new OkHttpClient();

        // 发送OPTIONS请求
        Request optionsRequest = new Request.Builder()
                .url("https://example.com/api/resource")
                .method("OPTIONS", null)
                .build();
        try {
            Response optionsResponse = client.newCall(optionsRequest).execute();
            // 处理OPTIONS响应
            System.out.println("OPTIONS响应码：" + optionsResponse.code());
            System.out.println("OPTIONS响应头部信息：" + optionsResponse.headers());
        } catch (IOException e) {
            e.printStackTrace();
        }

        // 发送HEAD请求
        Request headRequest = new Request.Builder()
                .url("https://example.com/api/resource")
                .method("HEAD", null)
                .build();
        try {
            Response headResponse = client.newCall(headRequest).execute();
            // 处理HEAD响应
            System.out.println("HEAD响应码：" + headResponse.code());
            System.out.println("HEAD响应头部信息：" + headResponse.headers());
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}