springboot整和阿里云oss

1、开通“对象存储OSS”服务

（1）申请阿里云账号
（2）实名认证
（3）开通“对象存储OSS”服务
（4）进入管理控制台

2、创建Bucket

选择：标准存储、公共读、不开通

3、上传默认头像

创建文件夹avatar，上传默认的用户头像

4、创建Access Key

5、创建springboot项目

编写yml

#阿里云 OSS
aliyun.oss.file.endpoint=oss-cn-beijing.aliyuncs.com
aliyun.oss.file.keyid=LTAI4GHMMJ9Poai7uuv2PFX3
aliyun.oss.file.keysecret=ZoY9hgIyquRkn3WtozdzPjBCggoSGY
aliyun.oss.file.bucketname=guli-edu-2020-12

aliyun.oss.file.endpoint：地域名称
aliyun.oss.file.keyid：AccessKey ID
aliyun.oss.file.keysecre： AccessKey Secret
aliyun.oss.file.bucketname：Buckets

ReadConfigUtils 类:

@Component
public class ReadConfigUtils  implements InitializingBean {
    @Value("${aliyun.oss.file.endpoint}")
    private String endpoint;

    @Value("${aliyun.oss.file.keyid}")
    private String keyid;

    @Value("${aliyun.oss.file.keysecret}")
    private String keysecret;

    @Value("${aliyun.oss.file.bucketname}")
    private String bucketname;


    public static String END_POINT;
    public static String ACCESS_KEY_ID;
    public static String ACCESS_KEY_SECRET;
    public static String BUCKET_NAME;

    @Override
    public void afterPropertiesSet() throws Exception {
        END_POINT  = endpoint;
        ACCESS_KEY_ID = keyid;
        ACCESS_KEY_SECRET = keysecret;
        BUCKET_NAME = bucketname;
    }
}

controller:

 @PostMapping("uploadingAvatar")
    public R UploadingAvatar(@ApiParam(name = "file", value = "文件", required = true)
        @RequestParam("file") MultipartFile file){
        String fileUrl = uploadingFileService.uploadingAvatar(file);
        return R.ok().data("fileUrl",fileUrl);
    }

service:

@Service
public class UploadingFileServiceImpl implements UploadingFileService {
    @Override
    public String uploadingAvatar(MultipartFile file) {
        String endpoint = ReadConfigUtils.END_POINT;
        String accessKeyId = ReadConfigUtils.ACCESS_KEY_ID;
        String accessKeySecret = ReadConfigUtils.ACCESS_KEY_SECRET;
        String bucketName = ReadConfigUtils.BUCKET_NAME;
        String uploadUrl = null;
        try {
            String filename = file.getOriginalFilename();
            String uuid = UUID.randomUUID().toString().replaceAll("-", "");
            // UUID+01.jpg
            filename = uuid+filename;
            String dateTimePath = new DateTime().toString("yyyy/MM/dd");
            // 2020/01/01/UUID+01.jpg
            filename = dateTimePath+"/"+filename;

            OSS ossClient = new OSSClientBuilder().build(endpoint, accessKeyId, accessKeySecret);
            //判断oss实例是否存在：如果不存在则创建，如果存在则获取
            if (!ossClient.doesBucketExist(bucketName)) {
                //创建bucket
                ossClient.createBucket(bucketName);
                //设置oss实例的访问权限：公共读
                ossClient.setBucketAcl(bucketName, CannedAccessControlList.PublicRead);
            }
            InputStream inputStream = file.getInputStream();
            ossClient.putObject(bucketName, filename, inputStream);
            ossClient.shutdown();

            //获取上传路径
            //https://guli-zc.oss-cn-beijing.aliyuncs.com/guLi/IMG_20201204_154516.jpg
            uploadUrl = "http://" + bucketName + "." + endpoint + "/" + filename;
            return uploadUrl;

        }catch (IOException e ){
            e.printStackTrace();
            return null;
        }
    }
}