本篇内容介绍了“feign传参MultipartFile问题如何解决”的有关知识，在实际案例的操作过程中，不少人都会遇到这样的困境，接下来就让小编带领大家学习一下如何处理这些情况吧！希望大家仔细阅读，能够学有所成！
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
计算
安全
数据库
网络和加速
企业服务
<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
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));
}
}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);
}
注意加上这个，表示传参格式：
就可以传参了的
pom.xml
<!-- https://mvnrepository.com/artifact/org.springframework/spring-mock -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-mock</artifactId>
<version>2.0.8</version>
</dependency>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()
@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
@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
@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);
}“feign传参MultipartFile问题如何解决”的内容就介绍到这里了，感谢大家的阅读。如果想了解更多行业相关的知识可以关注亿速云网站，小编将为大家输出更多高质量的实用文章！
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