GetObjectMetadataDemo.java

package com.qcloud.cos.demo;

import com.qcloud.cos.COSClient;
import com.qcloud.cos.ClientConfig;
import com.qcloud.cos.auth.BasicCOSCredentials;
import com.qcloud.cos.auth.COSCredentials;
import com.qcloud.cos.model.ObjectMetadata;
import com.qcloud.cos.region.Region;


public class GetObjectMetadataDemo {
    private static String secretId = System.getenv("SECRETID");
    private static String secretKey = System.getenv("SECRETKEY");
    private static String bucketName = System.getenv("BUCKET_NAME");
    private static String region = System.getenv("REGION");
    public static void main(String[] args) {
        getObjectMetadataDemo();
    }

    private static void getObjectMetadataDemo() {
        // 1 初始化用户身份信息(secretId, secretKey)
        COSCredentials cred = new BasicCOSCredentials(secretId, secretKey);
        // 2 设置bucket的区域, COS地域的简称请参照 https://www.qcloud.com/document/product/436/6224
        ClientConfig clientConfig = new ClientConfig(new Region(region));
        // 3 生成cos客户端
        COSClient cosclient = new COSClient(cred, clientConfig);

        String key = "aaa/bbb.txt";
        ObjectMetadata objectMetadata = cosclient.getObjectMetadata(bucketName, key);
        System.out.println(objectMetadata.getCrc64Ecma());
        System.out.println(objectMetadata.getLastModified());
        // 关闭客户端
        cosclient.shutdown();
    }
}