实现 文件上传【头像/图片】

浏览器---->后端服务----->阿里云OSS

工具类

@Data
@AllArgsConstructor
@Slf4j
public class AliOssUtil {

    private String endpoint;
    private String accessKeyId;
    private String accessKeySecret;
    private String bucketName;

    /**
     * 文件上传
     *
     * @param bytes
     * @param objectName
     * @return
     */
    public String upload(byte[] bytes, String objectName) {

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

        try {
            // 创建PutObject请求。
            ossClient.putObject(bucketName, objectName, new ByteArrayInputStream(bytes));
        } catch (OSSException oe) {
            System.out.println("Caught an OSSException, which means your request made it to OSS, "
                    + "but was rejected with an error response for some reason.");
            System.out.println("Error Message:" + oe.getErrorMessage());
            System.out.println("Error Code:" + oe.getErrorCode());
            System.out.println("Request ID:" + oe.getRequestId());
            System.out.println("Host ID:" + oe.getHostId());
        } catch (ClientException ce) {
            System.out.println("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.");
            System.out.println("Error Message:" + ce.getMessage());
        } finally {
            if (ossClient != null) {
                ossClient.shutdown();
            }
        }

        //文件访问路径规则 https://BucketName.Endpoint/ObjectName
        StringBuilder stringBuilder = new StringBuilder("https://");
        stringBuilder
                .append(bucketName)
                .append(".")
                .append(endpoint)
                .append("/")
                .append(objectName);

        log.info("文件上传到:{}", stringBuilder.toString());

        return stringBuilder.toString();
    }
}

代码实现

1. 在application.yml中编写相关信息

   sky:
     alioss:
       endpoint: oss-cn-hangzhou.aliyuncs.com
       access-key-id: LTAI5tJKk5H21ZmQQ9CgeG8y
       access-key-secret: 90xHhXxKqg6LNnbb4ubp1BeIdw7RAT
       bucket-name: sky-zy2596
   

2. 编写AliOssProperties ，将yml文件信息映射到AliOssProperties对象中

   @Component
   @ConfigurationProperties(prefix = "sky.alioss")
   @Data
   public class AliOssProperties {
   
       private String endpoint;
       private String accessKeyId;
       private String accessKeySecret;
       private String bucketName;
   
   }
   

3. 编写配置类，创建AliOssUtil对象

   /**
    * 配置类，用于创建AliOssUtil对象
    */
   @Configuration
   @Slf4j
   public class OssConfiguration {
   
       @Bean
       @ConditionalOnMissingBean//保证spring容器只有一个AliOssUtil对象
       public AliOssUtil aliOssUtil(AliOssProperties aliOssProperties ){//将aliOssProperties 中的属性赋给AliOssUtil对象
           log.info("开始创建阿里云文件上传工具类对象：{}",aliOssProperties);
           return new AliOssUtil(aliOssProperties.getEndpoint()
                   ,aliOssProperties.getAccessKeyId()
                   ,aliOssProperties.getAccessKeySecret()
                   ,aliOssProperties.getBucketName());
   
       }
   }
   

4. 编写文件上传接口

   @PostMapping("/upload")
   @ApiOperation("文件上传")
   public Result<String> upload(MultipartFile file){// file 这里的参数名必须和前端提交的参数名保持一致
       log.info("文件上传:{}",file);
       try {
           //原始文件名
           String originalFilename = file.getOriginalFilename();
           //截取原始文件名的后缀
           String extension = originalFilename.substring(originalFilename.lastIndexOf("."));
           //构造新文件名称
           String objectName = UUID.randomUUID().toString() + extension;
           //文件的请求路径
           String filePath = aliOssUtil.upload(file.getBytes(), objectName);
           return Result.success(filePath);
   
       } catch (IOException e) {
           log.error("文件上传失败：{}",e);
       }
          return Result.error("文件上传失败");
   }