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This article mainly introduces how to solve the problem of using feign to pass parameter type to MultipartFile. It is very detailed and has certain reference value. Friends who are interested must read it!

Feign pass parameter type is MultipartFile

Feign does not support file transfer of multimedia file types by default, but this problem can be solved by introducing third-party jar packages, which can be divided into three steps.

Introduce maven dependency io.github.openfeign.form feign-form 3.3.0 io.github.openfeign.form feign-form-spring 3.3.0 to join the configuration class @ Configurationpublic class FeignMultipartSupportConfig {@ Bean @ Primary @ Scope ("prototype") public Encoder multipartFormEncoder () {return new SpringFormEncoder () } @ Bean public feign.Logger.Level multipartLoggerLevel () {return feign.Logger.Level.FULL;}} configure import org.springframework.cloud.openfeign.FeignClient;import org.springframework.http.MediaType;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RequestMethod;import org.springframework.web.bind.annotation.RequestParam;import org.springframework.web.bind.annotation.RequestPart;import org.springframework.web.multipart.MultipartFile on the feign client Import config.FeignMultipartSupportConfig;import feign.Response;@FeignClient (value = "", fallback = FileServiceFallback.class,configuration=FeignMultipartSupportConfig.class) public interface IFileService {/ / upload file @ RequestMapping (value = "/ rmi/fileService/mediaImgUpload", produces = {MediaType.APPLICATION_JSON_UTF8_VALUE}, consumes = MediaType.MULTIPART_FORM_DATA_VALUE) public String mediaImgUpload (@ RequestPart MultipartFile file) / / download the file @ RequestMapping (value = "/ rmi/fileService/mediaDownload", method = RequestMethod.GET,consumes = MediaType.APPLICATION_JSON_UTF8_VALUE) public Response mediaDownload (@ RequestParam (required = true) String mediaId); solve the problem of feign passing parameters MultipartFile

First, calls between feign services. The default format for passing parameters is: ContentType=application/x-www-form-urlencoded.

Parameters are passed in the form of a form, while the parameters of the file stream need the ContentType of form-data, otherwise an error will be reported.

First introduce dependency io.github.openfeign.form feign-form 3.8.0 io.github.openfeign.form feign-form-spring 3.8.0

Note that the spring boot version is above 2.x, and the above two dependent versions are not less than 3.5.0, otherwise they are still invalid.

Create a new configuration package com.wm.blog_config.config; import feign.codec.Encoder;import feign.form.spring.SpringFormEncoder;import org.springframework.beans.factory.ObjectFactory;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.boot.autoconfigure.http.HttpMessageConverters;import org.springframework.cloud.openfeign.support.SpringEncoder;import org.springframework.context.annotation.Bean;import org.springframework.context.annotation.Configuration for feign / * * @ author: half Volume year * @ description: solve the exception of feign transferring stream data * @ createTime: 2020-6-14 * / @ Configurationpublic class FeignSupportConfig {@ Autowired private ObjectFactory messageConverters; @ Bean public Encoder feignFormEncoder () {return new SpringFormEncoder (new SpringEncoder (messageConverters));} configure package com.wm.blog_admin.feign; import com.wm.blog_admin.feign.factory.PictureClientFallbackFactory in the feign interface Import com.wm.blog_common.constatnt.CommonConstant;import com.wm.blog_common.domain.TFileDO;import com.wm.blog_common.entity.TFile;import com.wm.blog_common.req.TFileQuery;import com.wm.blog_common.result.Result;import com.wm.blog_config.config.CustomFeignConfig;import com.wm.blog_config.config.FeignSupportConfig;import org.springframework.cloud.openfeign.FeignClient;import org.springframework.http.MediaType;import org.springframework.web.bind.annotation.* Import org.springframework.web.multipart.MultipartFile; import java.util.List / * @ ClassName: PictureFeignClient * @ Description: when picture feign calls todo feign, there is a hole in using get. Do you consider using HttpClient instead of HttpURLConnection in feign? Use apache's HttpClient * @ Author: wm_yu * @ Create_time: 16:39 2020-3-26 * / @ FeignClient (value = CommonConstant.PICTURE_MODULE_NAME, configuration = {CustomFeignConfig.class, FeignSupportConfig.class}, fallbackFactory = PictureClientFallbackFactory.class) public interface PictureFeignClient {/ * id query picture information * @ param id * @ return * / @ GetMapping ("/ web/picture/ {id}") Result get (@ PathVariable ("id") Long id) / * id batch query image information * @ param idList * @ return * / @ PostMapping ("/ web/picture/getByIdList") Result getByIdList (@ RequestBody List idList) / * * File upload * @ param file * @ return * / @ PostMapping (value = "/ web/picture/uploadFile", produces = {MediaType.APPLICATION_JSON_UTF8_VALUE}, consumes = MediaType.MULTIPART_FORM_DATA_VALUE) Result uploadFile (@ RequestPart ("file") MultipartFile file);}

Note that this indicates the format of passing parameters:

You can pass the parameters.

The above is all the content of this article entitled "how to solve the problem of using feign to pass parameter type to MultipartFile". Thank you for reading! Hope to share the content to help you, more related knowledge, welcome to follow the industry information channel!

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