FeignSpring Cloud Feign Client 调用文件上传接口实现MultipartFile上传文件功能

场景：

        跨服务调用文件上传接口

        技术栈：Feign nacos

报错：

                feign.codec.EncodeException: Error converting request body

解决方案：

step1：添加pom依赖

1.  
   <!--这里我使用nacos注册中心，如果没有使用可以不用nacos-discovery-->
2.  
   <dependency>
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   <groupId>com.alibaba.cloud</groupId>
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   <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
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   </dependency>
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   <dependency>
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   <groupId>org.springframework.cloud</groupId>
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   <artifactId>spring-cloud-starter-openfeign</artifactId>
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   </dependency>

step2：添加配置类  FeignMultipartSupportConfig.java

1.  
    
2.  
   import feign.codec.Encoder;
3.  
   import feign.form.spring.SpringFormEncoder;
4.  
   import org.springframework.beans.BeansException;
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   import org.springframework.beans.factory.ObjectFactory;
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   import org.springframework.boot.autoconfigure.http.HttpMessageConverters;
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   import org.springframework.cloud.openfeign.support.SpringEncoder;
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   import org.springframework.context.annotation.*;
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   import org.springframework.web.client.RestTemplate;
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11.  
     
12.  
    @Configuration
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    public class FeignMultipartSupportConfig {
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    @Bean
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    @Primary
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    @Scope("prototype")
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    public Encoder multipartFormEncoder() {
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    return new SpringFormEncoder(new SpringEncoder(new ObjectFactory<HttpMessageConverters>() {
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    @Override
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    public HttpMessageConverters getObject() throws BeansException {
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    return new HttpMessageConverters(new RestTemplate().getMessageConverters());
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    }
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    }));
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    }
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27.  
    @Bean
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    public feign.Logger.Level multipartLoggerLevel() {
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    return feign.Logger.Level.FULL;
30.  
     
31.  
    }
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    }

step3：编写Feign Client

1.  
   import com.hzd.config.FeignMultipartSupportConfig;
2.  
   import com.privatecloud.core.dto.JsonResult;
3.  
   import org.springframework.cloud.openfeign.FeignClient;
4.  
   import org.springframework.http.MediaType;
5.  
   import org.springframework.web.bind.annotation.PostMapping;
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   import org.springframework.web.bind.annotation.RequestParam;
7.  
   import org.springframework.web.bind.annotation.RequestPart;
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   import org.springframework.web.multipart.MultipartFile;
9.  
    
10.  
    /**
11.  
    * 注意点
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    * 1：configuration = FeignMultipartSupportConfig.class
13.  
    * 2.consumes = MediaType.MULTIPART_FORM_DATA_VALUE
14.  
    */
15.  
     
16.  
    @FeignClient(value = "baseserver",configuration = FeignMultipartSupportConfig.class)
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    public interface BaseserverClient {
18.  
     
19.  
    /**
20.  
    * 文件上传至阿里云
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    * @param file
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    * @param imei
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    * @param sysDictItemId
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    * @return
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    */
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    @PostMapping(value = "/file/image/uplode", consumes = MediaType.MULTIPART_FORM_DATA_VALUE)
27.  
    JsonResult<String> upload(@RequestPart MultipartFile file);
28.  
    }

step4：调用

1.  
    
2.  
   @Api(tags = "植物智能管理", value = "植物库")
3.  
   @RestController
4.  
   @RequestMapping("/plant/AI")
5.  
   @Slf4j
6.  
   public class PlantAIController {
7.  
    
8.  
    
9.  
   @Autowired
10.  
    private BaseserverClient baseserverClient;
11.  
     
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    @PostMapping("/recognition")
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    public void test(@RequestPart(value = "file", required = false) MultipartFile file){
14.  
     
15.  
    baseserverClient.upload(file);
16.  
     
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    }
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    }

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