通过feign上传文件[原]

通过feign上传文件且传token

	FeignClientTestControllerImpl(客户端Controller)
	|
	IFileFeign (由客户端Controller使用以调用服务端Controller)	-->	FileUploadControllerImpl (服务方Controller)

FileUploadControllerImpl

package com.bobo.a.b.controller.impl;

import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;

import static org.springframework.http.MediaType.MULTIPART_FORM_DATA_VALUE;

//服务提供方
@RestController("demonController")
@RequestMapping("controller")
public class FileUploadControllerImpl {

    @RequestMapping(
            value = {"/upload/{name}"},
            method = {RequestMethod.POST},
            consumes = MULTIPART_FORM_DATA_VALUE)
    public void upload(HttpServletRequest request,
                       HttpServletResponse response,
                       @RequestPart(value = "file", required = true) MultipartFile file,
                       @PathVariable(value = "name") String name,
                       @RequestParam(value = "age", required = false) String age,
                       @RequestHeader(value = "token") String token) {
        System.out.println(file.getName());
        InputStream is = null;
        FileOutputStream fos = null;
        try {
            is = file.getInputStream();
            File destFile = new File("d://bbb-target.png");
            fos = new FileOutputStream(destFile);
            cn.hutool.core.io.FileUtil.writeFromStream(is, "d://bbb-target.png");
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {
                if (is != null) {
                    is.close();
                }
                if (fos != null) {
                    fos.close();
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }

}

FeignClientTestControllerImpl

package com.bobo.a.b.controller.impl;

import com.rosellete.iescp.base.annotation.StdRequestMapping;
import com.rosellete.iescp.cshop.feign.IFileFeign;
import org.apache.commons.fileupload.disk.DiskFileItem;
import org.apache.commons.io.FileUtils;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;
import org.springframework.web.multipart.commons.CommonsMultipartFile;

import javax.annotation.Resource;
import java.io.File;
import java.io.IOException;
import java.io.OutputStream;

import static org.springframework.http.MediaType.MULTIPART_FORM_DATA_VALUE;

@RestController("demonClientController")
@RequestMapping("clientController")
public class FeignClientTestControllerImpl {

    @Resource
    IFileFeign fileFeign;

    @StdRequestMapping(value = {"/upload"}, method = {RequestMethod.GET, RequestMethod.POST})
    public void upload() {
        File file = new File("D://bbb-src.png");
        final MultipartFile multipartFile = getMultipartFile(file);
        final String result = fileFeign.upload(multipartFile, "bobo", "18","bobotoken");
        System.out.println(result);
    }

    /**
     * File 转 Multipart
     * 封装MultipartFile参数(File转MultipartFile方法)==>https://www.jianshu.com/p/43705673b1aa
     * 本处采用第二种方式
     *
     * @param file
     * @return
     */
    public static MultipartFile getMultipartFile(File file) {
        DiskFileItem item = new DiskFileItem("file"
                , MULTIPART_FORM_DATA_VALUE
                , true
                , file.getName()
                , (int) file.length()
                , file.getParentFile());
        try {
            OutputStream os = item.getOutputStream();
            byte[] byteArray = FileUtils.readFileToByteArray(file);
            os.write(byteArray);
        } catch (IOException e) {
            e.printStackTrace();
        }
        return new CommonsMultipartFile(item);
    }
}

IFileFeign

package com.bobo.a.b.feign;


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.FeignClient;
import org.springframework.cloud.openfeign.support.SpringEncoder;
import org.springframework.context.annotation.Bean;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import static org.springframework.http.MediaType.MULTIPART_FORM_DATA_VALUE;
import static org.springframework.web.bind.annotation.RequestMethod.POST;

/**
 * feignClient客户端  ,Feign实现微服务间文件上传（Finchley版本）==>https://www.jianshu.com/p/4f4d9d084b1d
 */
@FeignClient(name = "CSHOP-BIZ-LAND", path = "/cshop-biz-land", configuration = IFileFeign.ClientConfiguration.class)
public interface IFileFeign {

    /**
     *
     * @param file  文件
     * @param name 姓名
     * @param age 年龄
     * @param token 令牌
     * @return
     */
    @RequestMapping(
            value = "/controller/upload/{name}",
            method = POST,
            consumes = MULTIPART_FORM_DATA_VALUE //处理多个参数的时候，必须指定：consumes = MULTIPART_FORM_DATA_VALUE
    )
    public String upload(
            @RequestPart(value = "file", required = true) MultipartFile file,
            @PathVariable(value = "name") String name,
            @RequestParam(value = "age", required = false) String age,
            @RequestHeader(value = "token") String token);

    /**
     * 配置类,经测试没有该配置也能正常调用
     */
    class ClientConfiguration {
        /**
         * 此处注入的是： ObjectFactory<HttpMessageConverters>
         */
        @Autowired
        private ObjectFactory<HttpMessageConverters> messageConverters;

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


}