阿里云OSS实现头像上传

目录结构：

application.yml

server:
  port: 8002
spring:
  application:
    name: service-oss
  profiles:
    active: dev

aliyun:
  oss:
    file:
      endpoint: oss-cn-beijing.aliyuncs.com
      keyid: LTAI4G8q7nBEsUb1NxXC
      keysecret: 3FEJ5vh5EttqiiLdviC1dVjuvU
      #bucket可以在控制台创建也可以在代码中创建
      bucketname: edu-guli-study

ConstantPropertiesUtils:(用于注入配置文件中的阿里云配置信息)

@Component //实现InitializingBean接口可以执行执行赋值后的一些逻辑（由于属性是private的）
public class ConstantPropertiesUtils 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;

    /*定义公有静态常量*/
    public static String ENDPOINT;
    public static String KEYID;
    public static String KEYSECRET;
    public static String BUCKETNAME;


    @Override
    public void afterPropertiesSet() throws Exception {
        ENDPOINT = endpoint;
        KEYID = keyId;
        KEYSECRET = keySecret;
        BUCKETNAME = bucketName;
    }
}

OssApplication:

@SpringBootApplication(exclude = DataSourceAutoConfiguration.class)
@ComponentScan(basePackages = {"com.coderkun"}) //为了swagger扫描到该包下的Controller
public class OssApplication {
    public static void main(String[] args) {
        SpringApplication.run(OssApplication.class,args);
    }
}

OSSController：

@RestController
@Api(description = "oss文件上传")
@RequestMapping("/eduoss/fileoss")
@CrossOrigin
public class OssController {

    @Autowired
    private OssService ossService;

    //上传头像方法
    @PostMapping
    public R uploadOssFile(MultipartFile file){
        String url = ossService.uploadOssFileAvatar(file);
        return R.ok().data("url",url);
    }
}

OssService:

public interface OssService {
    //上传头像到oss
    String uploadOssFileAvatar(MultipartFile file);
}

OssServiceImpl:

@Service
public class OssServiceImpl implements OssService {
    @Override
    public String uploadOssFileAvatar(MultipartFile file) {
        // Endpoint以杭州为例，其它Region请按实际情况填写。
        String endpoint = ConstantPropertiesUtils.ENDPOINT;
        // 云账号AccessKey有所有API访问权限，建议遵循阿里云安全最佳实践，创建并使用RAM子账号进行API访问或日常运维，请登录 https://ram.console.aliyun.com 创建。
        String accessKeyId = ConstantPropertiesUtils.KEYID;
        String accessKeySecret = ConstantPropertiesUtils.KEYSECRET;
        String bucketName = ConstantPropertiesUtils.BUCKETNAME;


        try {
            // 创建OSSClient实例。
            OSS ossClient = new OSSClientBuilder().build(endpoint, accessKeyId, accessKeySecret);

            // 上传文件流。
            InputStream inputStream = file.getInputStream();

            //获取文件名称
            String fileName = file.getOriginalFilename();
            //1.由于文件名重复会覆盖，生成随机文件名
            String uuid = UUID.randomUUID().toString().replaceAll("-","");
            fileName = uuid + fileName;
            //2.把文件按照日期分类
            String datePath = new DateTime().toString("yyyy/MM/dd");
            fileName = datePath + "/" + fileName; //2020/6/4/dafdf.jpg

            //第二个参数：上传到oss的文件路径和文件名称  /aa/bb1.jpg
            ossClient.putObject(bucketName,fileName, inputStream);

            // 关闭OSSClient。
            ossClient.shutdown();

            //把上传之后oss返回的文件url返回（）
            //url格式：https://edu-guli-study.oss-cn-beijing.aliyuncs.com/%25U%7EHW%2502P2OH6FXR%29%5B8%60T2A.png
            String url = "https://"+bucketName+"."+endpoint+"/"+fileName;
            return url;
        } catch (IOException e) {
            e.printStackTrace();
            return null;
        }
    }
}