基于feign传参MultipartFile问题解决

feign传参MultipartFile问题

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

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									<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

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									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; 

									/**

									 * @author ：半卷流年

									 * @description : 解决feign传递流数据的异常

									 * @createTime ：2020/6/14

									 */

									@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

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									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;

									/***

									 * @ClassName: PictureFeignClient

									 * @Description: picture feign调用  todo feign使用get有坑啊,是否考虑使用HttpClient替换feign的HttpURLConnection，采用apache的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查询图片信息

									     * @param id

									     * @return

									     */

									    @GetMapping("/web/picture/{id}")

									    Result<TFileDO> get(@PathVariable("id") Long id); 

									    /**

									     * id批量查询图片信息

									     * @param idList

									     * @return

									     */

									    @PostMapping("/web/picture/getByIdList")

									    Result<List<TFile>> getByIdList(@RequestBody List<Long> idList); 

									    /**

									     * 文件上传

									     * @param file

									     * @return

									     */

									    @PostMapping(value = "/web/picture/uploadFile",produces = {MediaType.APPLICATION_JSON_UTF8_VALUE},consumes = MediaType.MULTIPART_FORM_DATA_VALUE)

									     Result<String> uploadFile(@RequestPart("file") MultipartFile file);

									}

基于feign传参MultipartFile问题解决

注意加上这个，表示传参格式：

基于feign传参MultipartFile问题解决

就可以传参了的

Feign传输 MultipartFile的一些问题

File转MultipartFile

pom.xml

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									<!-- https://mvnrepository.com/artifact/org.springframework/spring-mock -->

									<dependency>

									<groupId>org.springframework</groupId>

									<artifactId>spring-mock</artifactId>

									<version>2.0.8</version>

									</dependency>

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									public static MultipartFile getMultipartFile(String fileName, File file) throws IOException {

									    return new MockMultipartFile(fileName, file.getName(), ContentType.APPLICATION_OCTET_STREAM.toString(), new FileInputStream(file));

									}

报错 Current request is not a multipart request、Content type ‘’ not supported

@PostMapping设置 consumes = MediaType.MULTIPART_FORM_DATA_VALUE

使用@RequestPart()，不能使用@RequestParam()

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									@PostMapping(value = "/upload", consumes = MediaType.MULTIPART_FORM_DATA_VALUE)

									ResultBody upload(@RequestPart(value = "file") MultipartFile file);

报错 Required request part ‘file’ is not present

configuration

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									@Configuration

									public class UploadFeignConfig {

									    @Bean

									    public Encoder multipartFormEncoder() {

									        return new SpringFormEncoder(new SpringEncoder(new ObjectFactory<HttpMessageConverters>() {

									            @Override

									            public HttpMessageConverters getObject() throws BeansException {

									                return new HttpMessageConverters(new RestTemplate().getMessageConverters());

									            }

									        }));

									    }

									}

FeignClient

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									@FeignClient(value = FileConstants.FILE_SERVER, configuration= UploadFeignConfig.class)

									public interface FileServiceClient extends IFileServiceClient {

									    @Override

									    @PostMapping(value = "/upload", consumes = MediaType.MULTIPART_FORM_DATA_VALUE)

									    ResultBody upload(@RequestPart(value = "file") MultipartFile file);

									}