使用springboot实现阿里云照片缓存

要使用Spring Boot实现阿里云照片缓存，首先需要在阿里云上创建一个OSS（对象存储服务）实例，然后在Spring Boot应用中使用阿里云提供的Java SDK进行开发。

以下是一个简单的示例，演示如何在Spring Boot应用中使用阿里云OSS服务缓存照片：

1. 首先，需要在Spring Boot应用的pom.xml文件中添加阿里云Java SDK的依赖：

<dependency>
    <groupId>com.aliyun.oss</groupId>
    <artifactId>aliyun-sdk-oss</artifactId>
    <version>3.10.2</version>
</dependency>

2. 在application.properties文件中添加阿里云OSS的配置信息：

aliyun.oss.endpoint=your-oss-endpoint
aliyun.oss.accessKeyId=your-access-key-id
aliyun.oss.accessKeySecret=your-access-key-secret
aliyun.oss.bucketName=your-bucket-name

3. 创建一个AliyunOSSService类，用于将照片上传到阿里云OSS，并从OSS中获取照片：

@Service
public class AliyunOSSService {
    @Value("${aliyun.oss.endpoint}")
    private String endpoint;

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

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

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

    private OSS ossClient;

    public void init() {
        ossClient = new OSSClientBuilder().build(endpoint, accessKeyId, accessKeySecret);
    }

    public void destroy() {
        ossClient.shutdown();
    }

    public String uploadPhoto(InputStream inputStream, String contentType, String fileName) {
        try {
            ObjectMetadata metadata = new ObjectMetadata();
            metadata.setContentType(contentType);
            ossClient.putObject(bucketName, fileName, inputStream, metadata);
            return ossClient.generatePresignedUrl(bucketName, fileName, new Date(System.currentTimeMillis() + 3600 * 1000)).toString();
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }

    public InputStream getPhoto(String fileName) {
        try {
            OSSObject object = ossClient.getObject(bucketName, fileName);
            return object.getObjectContent();
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }
}

4. 在Spring Boot应用中使用AliyunOSSService类进行照片上传和获取：

@RestController
public class PhotoController {
    @Autowired
    private AliyunOSSService aliyunOSSService;

    @PostMapping("/photos")
    public String uploadPhoto(@RequestParam("file") MultipartFile file) {
        try {
            String photoUrl = aliyunOSSService.uploadPhoto(file.getInputStream(), file.getContentType(), file.getOriginalFilename());
            return photoUrl;
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }

    @GetMapping("/photos/{fileName}")
    public ResponseEntity<byte[]> getPhoto(@PathVariable("fileName") String fileName) {
        try {
            InputStream inputStream = aliyunOSSService.getPhoto(fileName);
            byte[] bytes = IOUtils.toByteArray(inputStream);
            HttpHeaders headers = new HttpHeaders();
            headers.setContentType(MediaType.IMAGE_JPEG);
            return new ResponseEntity<>(bytes, headers, HttpStatus.OK);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }
}

以上示例演示了如何在Spring Boot应用中使用阿里云OSS服务缓存照片。可以根据自己的实际需求进行修改和扩展。