使用springboot上传文件至nginx代理服务器

nginx配置图片服务器

    server {
    listen       8001;
    server_name  image.xxx.com;

    proxy_set_header X-Forwarded-Host $host;
    proxy_set_header X-Forwarded-Server $host;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;

    location / {
        # 放置物理路径
        root C:\zysuyuan\image;
        }
    }

一、编写application.yml

server:
  port: 8082
spring:
  application:
    name: upload-service
  servlet:
    multipart:
      max-file-size: 5MB
eureka:
  client:
    service-url:
      defaultZone: http://localhost:10086/eureka
  instance:
    lease-renewal-interval-in-seconds: 5  # 心跳时间5s
    lease-expiration-duration-in-seconds: 15  #  过期时间15s

二、编写Controller

@Controller
@RequestMapping("upload")
public class UploadController {

    @Autowired
    private UploadService uploadService;

    @PostMapping("image")
    public ResponseEntity<String> uploadImage(@RequestParam("file")MultipartFile file){
        String url = this.uploadService.uploadImage(file);
        if (StringUtils.isBlank(url)){
            return ResponseEntity.badRequest().build();
        }
        return ResponseEntity.status(HttpStatus.CREATED).body(url);
    }
}

三、编写Service

@Service
public class UploadService {

    // 制作文件的白名单,使用Arrays.asList列出一个常量的字符串
    private static final List<String> CONTENT_TYPES = Arrays.asList("image/gif","image/jpeg","image/png");
    // 定义输出错误日志
    private static final Logger LOGGER = LoggerFactory.getLogger(UploadService.class);

    public String uploadImage(MultipartFile file) {

        // 获取文件类型
        String originalFilename = file.getOriginalFilename();

        try {
            // 校验文件类型
            // 列出所有文件合法类型
            String contentType = file.getContentType();
            if (!CONTENT_TYPES.contains(contentType)){
                LOGGER.info("文件类型不合法：{}",originalFilename);
                return null;
            }

            // 校验文件的内容，ImageIO读取文件内容
            BufferedImage bufferedImage = ImageIO.read(file.getInputStream());
            if (bufferedImage == null) {
                LOGGER.info("文件内容不合法：{}",originalFilename);
                return null;
            }

            // 保存到服务器
            file.transferTo(new File("C:\zysuyuan\image\" + originalFilename));

            // 返回url，进行回显
            return "http://image.xxx.com/" + originalFilename;

        } catch (IOException e) {
            LOGGER.info("服务器内部错误：" + originalFilename);
            e.printStackTrace();
        }
        return null;
    }
}

测试：使用Advanced-REST-client进行文件上传测试

链接：https://pan.baidu.com/s/10Ax3eSY5zCwRRMHBDI-1sw
提取码：cjhq

最后，可以通过访问nginx配置的web服务器，访问对于图片的url来测试文件是否上传成功。