java 怎么调用 https://oapi.dingtalk.com/topapi/edu/dept/list

Java调用HTTPS接口可以使用Java的HttpURLConnection和HttpsURLConnection类来实现。以下是调用HTTPS接口的示例代码：

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

public class HttpsURLConnectionDemo {

    public static void main(String[] args) {
        try {
            // 创建URL对象
            URL url = new URL("https://oapi.dingtalk.com/topapi/edu/dept/list");

            // 创建HttpsURLConnection对象
            HttpsURLConnection httpsConn = (HttpsURLConnection) url.openConnection();

            // 设置请求方法
            httpsConn.setRequestMethod("POST");

            // 设置请求头
            httpsConn.setRequestProperty("Content-Type", "application/json;charset=UTF-8");

            // 设置超时时间
            httpsConn.setConnectTimeout(5000);
            httpsConn.setReadTimeout(5000);

            // 开启输出流，向服务器写入数据
            httpsConn.setDoOutput(true);
            OutputStreamWriter out = new OutputStreamWriter(httpsConn.getOutputStream(), "UTF-8");
            out.write("你的请求参数");
            out.flush();
            out.close();

            // 获取响应结果
            BufferedReader in = new BufferedReader(new InputStreamReader(httpsConn.getInputStream(), "UTF-8"));
            StringBuilder result = new StringBuilder();
            String line;
            while ((line = in.readLine()) != null) {
                result.append(line);
            }
            in.close();

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

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

其中，需要将"你的请求参数"替换成实际的请求参数。此示例仅供参考，具体实现需根据实际情况而定。