Spring boot with file upload

首先需配置一个Multipart File Resolver，只需在配置类中加入一个返回CommonsMultipartResolver对象Bean的multipartResolver方法：

@Configuration

publicclassImageUploaderConfig

@Bean

publicCommonsMultipartResolvermultipartResolver()

CommonsMultipartResolverresolver=newCommonsMultipartResolver();

resolver.setMaxUploadSize(1000000);

returnresolver;

在Controller中使用Apache commons.io来简化io操作

@PostMapping("/ImageUploaderAction")

@ModelAttribute

publicStringimageUploaderAction(Modelmodel,MultipartFilefile)

Stringinfo="TestDemo";

if(file==null)

info="Youmustselectaimagefile";

else

if(!file.getOriginalFilename().endsWith(".jpeg")&&

!file.getOriginalFilename().endsWith(".jpg")&&

!file.getOriginalFilename().endsWith("png"))

info="OnlysupportJPEG/PNGfiles";

else

try

FileUtils.writeByteArrayToFile(newFile(this.storagePath+file.getOriginalFilename()),

file.getBytes());

info="Uploadsuccessfully,yourimageURLis:["+this.baseUrl+file.getOriginalFilename()+"]";

catch(IOExceptione)

e.printStackTrace();

info="Failtouploadimage,checkyourfile";

model.addAttribute("info",info);

return"ImageUploaderAction";

View中的form记得加入enctype="multipart/form-data"