钉钉开放接口-如何发起带有附件的审批单

import java.io.*;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.HashMap;
import java.util.Map;

public class fujian {
    public static void main(String args[]) throws  Exception{

        // 从接口返回信息中拿到resourceUrls
        String resourceUrl = "你获取到的resourceUrl";
        // 从接口返回信息中拿到headers
        Map<String, String> headers=new HashMap<>();
        headers.put("Authorization","你获取到的Authorization");
        headers.put("x-oss-date","你获取到的x-oss-date");
        URL url = new URL(resourceUrl);
        HttpURLConnection connection = (HttpURLConnection) url.openConnection();
        if (headers != null) {
            for (Map.Entry<String, String> entry : headers.entrySet()) {
                connection.setRequestProperty(entry.getKey(), entry.getValue());
            }
        }
        connection.setDoOutput(true);
        connection.setRequestMethod("PUT");
        connection.setUseCaches(false);
        connection.setReadTimeout(10000);
        connection.setConnectTimeout(10000);
        connection.connect();
        OutputStream out = connection.getOutputStream();
        InputStream is = new FileInputStream(new File("/Users/Downloads/你的文件.xlsx"));
        byte[] b = new byte[1024];
        int temp;
        while ((temp = is.read(b)) != -1) {
            out.write(b, 0, temp);
        }
        out.flush();
        out.close();
        int responseCode = connection.getResponseCode();
        connection.disconnect();
        if (responseCode == 200) {
            System.out.println("上传成功");
        } else {
            System.out.println("上传失败");
        }
    }
}