由于自己也是在网上几经一番折腾才找到部分博客并加以修改实现; 话不多说直接上代码;
1.1 文件上传之服务端代码(在此处以服务端内部上传OSS为例)
@PostMapping(value = "upload")
public BaseResult test(MultipartFile file) {
String downloadUrl = fileService.upload(file);
Preconditions.checkArgument(StringUtils.isNotEmpty(downloadUrl), UPLOAD_FILE_ERROR);
return BaseResult.generateSuccessRestlt(downloadUrl);
}
@Override
public String upload(MultipartFile file) {
String filename = file.getOriginalFilename();
try (InputStream inputStream = file.getInputStream()) {
PutObjectRequest putObjectRequest = new PutObjectRequest(fileConfig.getBucketName(),
filename, inputStream);
ossClient.putObject(putObjectRequest);
} catch (IOException e) {
log.error("filename:[{}],获取文件输入流错误!", filename, e);
return null;
} catch (OSSException | ClientException e) {
log.info("上传文件失败filename:[{}]", filename, e);
return null;
}
return filename;
}
1.2 文件下载之服务端代码
@GetMapping(value = "download")
public void down(@RequestParam(value = "filename") String filename,
HttpServletResponse response) {
fileService.download(filename, response);
}
@Override
public void download(String filepath, HttpServletResponse response) {
response
.setContentType("application/x-download;charset=" + Charsets.UTF_8.displayName());
response.addHeader("Content-Disposition",
"attachment;filename=" + this.reWriteChinese(filepath));
// ossObject包含文件所在的存储空间名称、文件名称、文件元信息以及一个输入流。
OSSObject ossObject;
try {
ossObject = ossClient.getObject(fileConfig.getBucketName(), filepath);
} catch (OSSException | ClientException e) {
log.error("获取OSS文件连接异常,filePath:[{}]", filepath, e);
return;
}
try (OutputStream outputStream = response.getOutputStream();
InputStream inputStream = ossObject.getObjectContent()) {
IOUtils.copy(inputStream, outputStream);
outputStream.flush();
} catch (IOException e) {
log.error("下载文件异常 filepath:[{}]", filepath, e);
}
}
1.3 文件上传和下载FeignClient调用方代码
/*
* Copyright (c) 2020 [email protected]
* All rights reserved.
*
*/
package com.dagm.api.feignclient;
import feign.Response;
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.GetMapping;
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 Guimu
* @date 2020/01/08
*/
@FeignClient(value = "file-service", configuration = FileFeign.MultipartSupportConfig.class)
public interface FileFeign {
/**
* 调用feign 对文件进行上传
*
* @param file 待上传的文件
* @return com.dagm.shorter.res.BaseResult
* @author Guimu
* @date 2020/1/8
*/
@PostMapping(value = "/inner/upload", consumes = MediaType.MULTIPART_FORM_DATA_VALUE)
BaseResult upload(@RequestPart("file") MultipartFile file);
/**
* 文件下载
*
* @return feign.Response
* @author Guimu
* @date 2020/1/8
*/
@GetMapping(value = "/inner/download")
Response download(@RequestParam("filename") String filename);
class MultipartSupportConfig {
@Bean
public Encoder feignFormEncoder() {
return new SpringFormEncoder();
}
}
}
1.4 tip:
- 文件的上传下载服务端代码, 和一般的上传下载一样:
OpenFeign 文件上传需要配置Encoder, 我这里用的是feign-form; 也可以选择其他的;
feign-form 版本对应 3.5版本之后的对应OpenFeign 10.* , 3.5版本之前的对应OpenFeign9.*
1.5 相关的pom 依赖
io.github.openfeign.form
feign-form
3.4.1
io.github.openfeign.form
feign-form-spring
3.4.1
1.6 附加一个调用方使用OpenFeign 上传文件和下载并返回给调用方客户端的demo
@PostMapping(value = "upload")
public BaseResult test(MultipartFile file) {
return fileFeign.upload(file);
}
@GetMapping(value = "download")
public void download(@RequestParam(value = "filename") String filename,
HttpServletResponse httpServletResponse) {
httpServletResponse
.setContentType("application/x-download;charset=" + Charsets.UTF_8.displayName());
httpServletResponse.addHeader("Content-Disposition",
"attachment;filename=" + this.reWriteChinese(filename));
Response response = fileFeign.download(filename);
Response.Body body = response.body();
try (OutputStream outputStream = httpServletResponse.getOutputStream();
InputStream inputStream = body.asInputStream()) {
IOUtils.copy(inputStream, outputStream);
outputStream.flush();
} catch (IOException e) {
log.error("下载文件异常 filepath:[{}]", filename, e);
}
}