Feign 实现微服务文件上传

在Spring Cloud 的Feign组件中并不支持文件的传输。这里记录一下个人的学习学习踩坑

服务提供者

文件上传功能代码

@RequestMapping(value = {"/image"}, method = {RequestMethod.POST}, consumes = MediaType.MULTIPART_FORM_DATA_VALUE)
    @ApiOperation(value = "上传图片")
    public ResponseData uploadImage(@ApiParam("图片数据") @RequestParam("image") MultipartFile file, @NotNull(message = "path不能为空") @ApiParam("保存路径") String path) {
        String imagePath = null;
        try {
            if (file == null || file.isEmpty()) {
                logger.warn("找不到上传的图片");
                return new ResponseData(404, "你总得把图片给我吧");
            }
            //上传的文件名
            String filename = file.getOriginalFilename();
            //获取文件的后缀
            String suffix = filename.substring(filename.lastIndexOf("."));

            if (allowUploadImages.indexOf(suffix.replace(".", "")) >= 0) {
                SimpleDateFormat dateFormat = new SimpleDateFormat("yyyyMM");
                String pathDir = "/images/" + path + "/" + dateFormat.format(new Date());
                filename = UUID.randomUUID().toString() + (suffix.trim());
                String realPath = staticLocations + pathDir;
                File saveFile = new File(new File(realPath), filename);
                if (!saveFile.getParentFile().exists()) {
                    saveFile.getParentFile().mkdirs();
                }
                file.transferTo(saveFile);
                imagePath = pathDir + "/" + filename;
            } else {
                logger.warn("非法图片格式");
                return new ResponseData(500, "这种图片格式我可不认");
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
        return new ResponseData(200, "success", imagePath);
    }

Feign客户端

1. 导入Feign文件上传解析依赖

<!-- feign 文件上传功能-->
        <dependency>
            <groupId>io.github.openfeign.form</groupId>
            <artifactId>feign-form</artifactId>
            <version>3.0.3</version>
        </dependency>
        <dependency>
            <groupId>io.github.openfeign.form</groupId>
            <artifactId>feign-form-spring</artifactId>
            <version>3.0.3</version>
        </dependency>
        <dependency>
            <groupId>commons-fileupload</groupId>
            <artifactId>commons-fileupload</artifactId>
            <version>1.3.3</version>
        </dependency>

2. 编写Feign 文件上传服务

@FeignClient(value = "upload-service",configuration= MultipartSupportConfig.class)
public interface UploadFeignService {

    @RequestMapping(value = {"/sys/upload/image"}, method = {RequestMethod.POST},consumes = MediaType.MULTIPART_FORM_DATA_VALUE)
    ResponseData uploadImage(@RequestPart(value = "file") MultipartFile file, @NotNull(message = "path不能为空") @RequestParam("path") String path);
}

3. 文件上传支持配置文件

public class MultipartSupportConfig {

    @Bean
    public Encoder feignFormEncoder() {
        return new SpringFormEncoder();
    }
}

服务消费者调用

@Autowired
    private UploadFeignService uploadFeignService;

    @RequestMapping(value = {"/image"}, method = {RequestMethod.POST}, produces = "application/json;charset=UTF-8")
    @ApiOperation(value = "上传图片")
    public ResponseData uploadImage(@ApiParam("图片数据") @RequestParam("image") MultipartFile file, @NotNull(message = "path不能为空") @ApiParam("保存路径") String path) {
        System.out.println("=======图片上传=========");
        ResponseData responseData = uploadFeignService.uploadImage(file, path);
        return responseData;
    }