阿里云OSS上传下载文件java

     <dependency>
            <groupId> com.aliyun.oss </groupId>
            <artifactId> aliyun-sdk-oss </artifactId>
            <version>3.14.1 </version>
        </dependency>

import com.aliyun.oss.ClientException;
import com.aliyun.oss.OSS;
import com.aliyun.oss.OSSClientBuilder;
import com.aliyun.oss.OSSException;
import com.aliyun.oss.model.GetObjectRequest;
import com.aliyun.oss.model.PutObjectRequest;
import lombok.extern.slf4j.Slf4j;
 
import java.io.File;
 
@Slf4j
public class AliyunUtil {
 
    // Endpoint以华东1（杭州）为例，其它Region请按实际情况填写。
    private static final String endpoint = "https://oss-cn-hangzhou.aliyuncs.com";
    // 阿里云账号AccessKey拥有所有API的访问权限，风险很高。强烈建议您创建并使用RAM用户进行API访问或日常运维，请登录RAM控制台创建RAM用户。
    private static final String accessKeyId = "yourAccessKeyId";
    private static final String accessKeySecret = "yourAccessKeySecret";
    // 填写Bucket名称，例如examplebucket。
    private static final String bucketName = "examplebucket";
 
    /**
     * @param objectName "exampledir/exampleobject.txt" 填写Object完整路径，完整路径中不能包含Bucket名称，例如exampledir/exampleobject.txt。
     * @param filePath   "D:\\localpath\\examplefile.txt" 填写本地文件的完整路径，例如D:\\localpath\\examplefile.txt。 如果未指定本地路径，则默认从示例程序所属项目对应本地路径中上传文件。
     * @throws Exception
     */
    public static void upload(String objectName, String filePath) throws Exception {
 
        // 创建OSSClient实例。
        OSS ossClient = new OSSClientBuilder().build(endpoint, accessKeyId, accessKeySecret);
 
        try {
            // 创建PutObjectRequest对象。
            PutObjectRequest putObjectRequest = new PutObjectRequest(bucketName, objectName, new File(filePath));
            // 如果需要上传时设置存储类型和访问权限，请参考以下示例代码。
            // ObjectMetadata metadata = new ObjectMetadata();
            // metadata.setHeader(OSSHeaders.OSS_STORAGE_CLASS, StorageClass.Standard.toString());
            // metadata.setObjectAcl(CannedAccessControlList.Private);
            // putObjectRequest.setMetadata(metadata);
 
            // 上传文件。
            ossClient.putObject(putObjectRequest);
        } catch (OSSException oe) {
            log.info("Caught an OSSException, which means your request made it to OSS, "
                    + "but was rejected with an error response for some reason.");
            log.info("Error Message:" + oe.getErrorMessage());
            log.info("Error Code:" + oe.getErrorCode());
            log.info("Request ID:" + oe.getRequestId());
            log.info("Host ID:" + oe.getHostId());
        } catch (ClientException ce) {
            log.info("Caught an ClientException, which means the client encountered "
                    + "a serious internal problem while trying to communicate with OSS, "
                    + "such as not being able to access the network.");
            log.info("Error Message:" + ce.getMessage());
        } finally {
            if (ossClient != null) {
                ossClient.shutdown();
            }
        }
    }
 
    /**
     * @param objectName "testfolder/exampleobject.txt"; 填写不包含Bucket名称在内的Object完整路径，例如testfolder/exampleobject.txt。
     * @param pathName   "D:\\localpath\\examplefile.txt"; 保存的位置
     * @throws Exception
     */
    public static void download(String objectName, String pathName) throws Exception {
 
        // 创建OSSClient实例。
        OSS ossClient = new OSSClientBuilder().build(endpoint, accessKeyId, accessKeySecret);
 
        try {
            // 下载Object到本地文件，并保存到指定的本地路径中。如果指定的本地文件存在会覆盖，不存在则新建。
            // 如果未指定本地路径，则下载后的文件默认保存到示例程序所属项目对应本地路径中。
            ossClient.getObject(new GetObjectRequest(bucketName, objectName), new File(pathName));
        } catch (OSSException oe) {
            log.info("Caught an OSSException, which means your request made it to OSS, "
                    + "but was rejected with an error response for some reason.");
            log.info("Error Message:" + oe.getErrorMessage());
            log.info("Error Code:" + oe.getErrorCode());
            log.info("Request ID:" + oe.getRequestId());
            log.info("Host ID:" + oe.getHostId());
        } catch (ClientException ce) {
            log.info("Caught an ClientException, which means the client encountered "
                    + "a serious internal problem while trying to communicate with OSS, "
                    + "such as not being able to access the network.");
            log.info("Error Message:" + ce.getMessage());
        } finally {
            if (ossClient != null) {
                ossClient.shutdown();
            }
        }
    }
}