@RequestMapping(value = "/load",method = RequestMethod.POST)
public void upload(HttpServletRequest req,HttpServletResponse res,@RequestParam("file") MultipartFile file){
if(file.isEmpty()){
throw new ToUserException("上传文件为空!");
}
Long time = System.currentTimeMillis();
try {
String orginateFileName = new String(file.getOriginalFilename().getBytes("ISO-8859-1"),"UTF-8");
System.out.println("导入原始文件名:"+orginateFileName);
System.out.println("导入原始文件大小:"+file.getSize());
String fileName = time+"_"+orginateFileName;
File localFile = new File("D://"+fileName);
file.transferTo(localFile);
ServletUtils.toJson(fileName,req,res);
} catch (Exception e) {
e.printStackTrace();
}
}
@GetMapping("/downLoad")
public void download(String id, HttpServletRequest request, HttpServletResponse response) {
System.out.println(id);
try (
FileInputStream inputStream = new FileInputStream(new File("D://"+id));
ServletOutputStream outputStream = response.getOutputStream();
) {
// 声明响应类型
response.setContentType("application/x-download");
// 下载的文件名称
response.addHeader("Content-Disposition", "attachment;filename="+id);
IOUtils.copy(inputStream, outputStream);
//ServletUtils.toJson(request,response);
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
直接贴的代码,有问题可以留言,demo版比较简单!
遇到问题1:请求报400 问题排查
- 需要消息头 Content-Type 设置为 multipart/form-data;
- spring需要配置文件解析器 配置如下
<!-- 定义文件上传解析器 --> <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"> <!-- 设定默认编码 --> <property name="defaultEncoding" value="UTF-8" /> <!-- 设定文件上传的最大值5MB,5*1024*1024 --> <property name="maxUploadSize" value="5242880" /> <property name="maxInMemorySize" value="4096" /> </bean>