springcloud使用Feign后台内部传递MultipartFile

 1.先修改Feign Client接口

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

    io.github.openfeign.form
    feign-form
	3.3.0


	io.github.openfeign.form
	feign-form-spring
	3.3.0

2.内部调用

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);
    }

3.注意点