SpringCloud使用Feign Form实现微服务之间的文件上传

1.pom依赖

<dependency>
    <groupId>io.github.openfeign.form</groupId>
    <artifactId>feign-form</artifactId>
    <version>3.0.1</version>
</dependency>
<dependency>
    <groupId>io.github.openfeign.form</groupId>
    <artifactId>feign-form-spring</artifactId>
    <version>3.0.1</version>
</dependency>

2.MultipartSupportConfig配置类

@Configuration
public class MultipartSupportConfig {
    @Autowired
    private ObjectFactory<HttpMessageConverters> messageConverters;

    @Bean
    public Encoder feignFormEncoder() {
        return new SpringFormEncoder(new SpringEncoder(messageConverters));
    }
}

3.后端接口改造

关键字consumes = MULTIPART_FORM_DATA_VALUE

/**
 * 文件上传接口
 * @param file 上传文件
 * @date 2019-11-19 11:56:40
 **/

@PostMapping(value = "uploadExamTarget", consumes = MULTIPART_FORM_DATA_VALUE)
public JsonResult uploadExamTarget(@RequestBody MultipartFile file) {
    return new JsonResult(coreClient.uploadExamTarget(file));
}

4.FeignClient接口改造

引入配置类MultipartSupportConfig，和接口注解consumes = MULTIPART_FORM_DATA_VALUE

@FeignClient(value = "core-server", configuration = MultipartSupportConfig.class)
public interface CoreClient {　　

　　/**
　　 * 调用core-server服务的文件上传接口
　　 * @param file 上传文件
 　　* @date 2019-11-19 11:56:40
 　　**/

　　@RequestMapping(value = "/excel/uploadExamTarget", consumes = MULTIPART_FORM_DATA_VALUE) 
　　String uploadExamTarget(@RequestBody MultipartFile file);
}