这篇文章主要介绍如何解决使用feign传递参数类型为MultipartFile的问题,文中介绍的非常详细,具有一定的参考价值,感兴趣的小伙伴们一定要看完!
feign传递参数类型为MultipartFile
feign默认是不支持多媒体文件类型的文件传输的,但是可以通过引入第三方jar包解决这个问题,步骤可以分为三步。
引入maven依赖
<dependency> <groupId>io.github.openfeign.form</groupId> <artifactId>feign-form</artifactId> <version>3.3.0</version> </dependency> <dependency> <groupId>io.github.openfeign.form</groupId> <artifactId>feign-form-spring</artifactId> <version>3.3.0</version> </dependency>
加入配置类
@Configurationpublic class FeignMultipartSupportConfig { @Bean @Primary @Scope("prototype") public Encoder multipartFormEncoder() { return new SpringFormEncoder(); } @Bean public feign.Logger.Level multipartLoggerLevel() { return feign.Logger.Level.FULL; }}
在feign客户端进行配置
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;import config.FeignMultipartSupportConfig;import feign.Response;@FeignClient(value = "", fallback = FileServiceFallback.class,configuration=FeignMultipartSupportConfig.class)public interface IFileService { //上传文件 @RequestMapping(value = "/rmi/fileService/mediaImgUpload", produces = {MediaType.APPLICATION_JSON_UTF8_VALUE},consumes = MediaType.MULTIPART_FORM_DATA_VALUE) public String mediaImgUpload(@RequestPart MultipartFile file); //下载文件 @RequestMapping(value = "/rmi/fileService/mediaDownload",method = RequestMethod.GET,consumes = MediaType.APPLICATION_JSON_UTF8_VALUE) public Response mediaDownload(@RequestParam(required = true) String mediaId);
feign传参MultipartFile问题解决
首先,feign服务之间的调用,传参默认的格式为:ContentType=application/x-www-form-urlencoded
以表单的形式传参的,而文件流的传参,需要form-data的ContentType,否则会报错的
首先引入依赖
<dependency> <groupId>io.github.openfeign.form</groupId> <artifactId>feign-form</artifactId> <version>3.8.0</version> </dependency> <dependency> <groupId>io.github.openfeign.form</groupId> <artifactId>feign-form-spring</artifactId> <version>3.8.0</version> </dependency>
注意spring boot版本是2.x以上的,上面两个依赖的版本不低于3.5.0,否则还是无效的
新建feign的配置
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; @Configurationpublic class FeignSupportConfig { @Autowired private ObjectFactory<HttpMessageConverters> messageConverters; @Bean public Encoder feignFormEncoder() { return new SpringFormEncoder(new SpringEncoder(messageConverters)); } }
在feign接口中配置
package com.wm.blog_admin.feign; import com.wm.blog_admin.feign.factory.PictureClientFallbackFactory;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; @FeignClient(value = CommonConstant.PICTURE_MODULE_NAME, configuration = {CustomFeignConfig.class, FeignSupportConfig.class}, fallbackFactory = PictureClientFallbackFactory.class)public interface PictureFeignClient { @GetMapping("/web/picture/{id}") Result<TFileDO> get(@PathVariable("id") Long id); @PostMapping("/web/picture/getByIdList") Result<List<TFile>> getByIdList(@RequestBody List<Long> idList); @PostMapping(value = "/web/picture/uploadFile",produces = {MediaType.APPLICATION_JSON_UTF8_VALUE},consumes = MediaType.MULTIPART_FORM_DATA_VALUE) Result<String> uploadFile(@RequestPart("file") MultipartFile file); }
注意加上这个,表示传参格式:
就可以传参了的
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