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
@Configuration
public 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;
@Configuration
public 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
以上为个人经验，希望能给大家一个参考，也希望大家多多支持编程网。
