Spring Cloud Feign文件传输的示例代码

<dependency>
  <groupId>commons-fileupload</groupId>
  <artifactId>commons-fileupload</artifactId>
  <version>1.3.1</version>
</dependency>

@Bean(name = "multipartResolver")
public MultipartResolver mutipartResolver(){
  CommonsMultipartResolver com = new CommonsMultipartResolver();
  com.setDefaultEncoding("utf-8");
  return com;
}

@SpringBootApplication(exclude = {MultipartAutoConfiguration.class})

@ResponseBody
@RequestMapping(value = "/upload", method = {RequestMethod.POST},
        produces = {MediaType.APPLICATION_JSON_UTF8_VALUE},
        consumes = MediaType.MULTIPART_FORM_DATA_VALUE)
public Result<String> uploadFile(@RequestPart("file")MultipartFile file,
@RequestParam("id")Long id){
  String fileName = file.getOriginalFilename();
  String extend = FileOperateUtil.suffix(fileName);
  FileOperateUtil.copy("E:\\" + fileName, file);
  return ResultBuilder.success("ok");
}

<dependency>
  <groupId>io.github.openfeign.form</groupId>
  <artifactId>feign-form-spring</artifactId>
  <version>3.2.2</version>
</dependency>
<dependency>
  <groupId>io.github.openfeign.form</groupId>
  <artifactId>feign-form</artifactId>
  <version>3.2.2</version>
</dependency>

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.web.HttpMessageConverters;
import org.springframework.cloud.netflix.feign.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));
  }

}

@FeignClient(name = "test-upload")
public interface UploadService{

  @ResponseBody
  @RequestMapping(value = "/upload", method = {RequestMethod.POST},
      produces = {MediaType.APPLICATION_JSON_UTF8_VALUE},
      consumes = MediaType.MULTIPART_FORM_DATA_VALUE)
  Result<String>uploadFile(@RequestPart("file")MultipartFile file,
@RequestParam("id")Long id);

}

// 注入 feign 接口
@Autowired
private UploadService uploadService;

@RequestMapping(value = "/upload", method = RequestMethod.POST, produces = "application/json; charset=utf-8")
@ResponseBody
public Result<String> testUpload(HttpServletRequest request, Long id){
  Result<String> result = null;
  MultipartHttpServletRequest mRequest = (MultipartHttpServletRequest) request;
  Map<String, MultipartFile> fileMap = mRequest.getFileMap();
  for (MultipartFile mFile : fileMap.values()) {
    String fileName = mFile.getOriginalFilename();
    result = uploadService.uploadFile(mFile, id);
  }
  return result;
}