这篇文章主要介绍了springcloud怎么使用Feign后台内部传递MultipartFile,具有一定借鉴价值,感兴趣的朋友可以参考下,希望大家阅读完这篇文章之后大有收获,下面让小编带着大家一起了解一下。
import feign.codec.Encoder; import feign.form.spring.SpringFormEncoder; import org.springframework.cloud.openfeign.FeignClient; import org.springframework.context.annotation.Bean; import org.springframework.http.MediaType; import org.springframework.web.bind.annotation.DeleteMapping; import org.springframework.web.bind.annotation.PostMapping; import org.springframework.web.bind.annotation.RequestParam; import org.springframework.web.bind.annotation.RequestPart; import org.springframework.web.multipart.MultipartFile; /** * @author linli * @date 20-06-27 */ @FeignClient(value = "upload", fallbackFactory = UploadFallbackFactory.class, configuration = UploadClient.MultipartSupportConfig.class) public interface UploadClient { @PostMapping(path = "/upload-text", consumes = MediaType.MULTIPART_FORM_DATA_VALUE) String uploadText(@RequestPart(name = "file") MultipartFile file); /** * 引用配置类MultipartSupportConfig.并且实例化 */ class MultipartSupportConfig { @Bean public Encoder feignFormEncoder() { return new SpringFormEncoder(); } } }
若SpringFormEncoder 引入报错,加上下面的依赖
<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>
private String uploadFile(String str) { FileOutputStream fos = null; FileInputStream fis = null; MultipartFile multipartFile = null; byte[] bt = str.getBytes(); File file = null; try { file = File.createTempFile("file" + UUID.randomUUID(), ".txt"); fos = new FileOutputStream(file); fos.write(bt, 0, bt.length); fis = new FileInputStream(file); multipartFile = new MockMultipartFile("file", file.getName(), MediaType.TEXT_PLAIN_VALUE, fis); } catch (FileNotFoundException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } finally { if (fis != null) { try { fis.close(); } catch (IOException e) { e.printStackTrace(); } } if (fos != null) { try { fos.close(); } catch (IOException e) { e.printStackTrace(); } } } return uploadClient.uploadText(multipartFile); }
通过调用服务进行文件上传,避免每个需要上传文件的模块都写一遍上传服务,造成代码冗余。
本文主要包含通过feign进行文件上传模块。
使技术人员在开发过程中遇到问题时有地可查,有章可循。
添加依赖
<dependency> <groupId>io.github.openfeign.form</groupId> <artifactId>feign-form</artifactId> <version>3.0.3</version> </dependency> <dependency> <groupId>io.github.openfeign.form</groupId> <artifactId>feign-form-spring</artifactId> <version>3.0.3</version> </dependency>
添加配置文件
package com.ruiyi.twowayreferral.configurer; 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 MultipartSupportConfig { @Autowired private ObjectFactory<HttpMessageConverters> messageConverters; @Bean public Encoder feignFormEncoder() { return new SpringFormEncoder(new SpringEncoder(messageConverters)); } }
代码示例
@FeignClient(value = "controller-center") public interface CallFrignService { /** * @Create 文件上传 wanggx_ruiyi 2019.11.15 * @param uploadPath 文件上传地址 * @param file 上传的文件 * @return */ @PostMapping(value = "/api/v1/common/file/fileUpload",consumes = MediaType.MULTIPART_FORM_DATA_VALUE) String fileUpload(@RequestParam(value = "uploadPath", required = true) String uploadPath,@RequestPart(value = "file", required = true) MultipartFile file); }
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