springBoot file upload backend configuration

1. File upload configuration

@Configuration
public class FileUploadConfiguration {
	@Bean
    public MultipartConfigElement multipartConfigElement() {
        MultipartConfigFactory factory = new MultipartConfigFactory();
        factory.setMaxFileSize("100MB"); // KB,MB
        factory.setMaxRequestSize("100MB");
        return factory.createMultipartConfig();
    }
}

2. Controller programming

@Controller
public class PicUploadController {
	@RequestMapping("/file/upload")
	@ResponseBody
	public void update(@RequestParam("file") MultipartFile upfile) throws Exception {
		String newName = System.currentTimeMillis()+".jpg";
		InputStream is = upfile.getInputStream();
		byte[] b = new byte[is.available()];
		is.read(b);
		FileOutputStream fos = new FileOutputStream(new File("E://"+newName));
		fos.write(b);
		fos.flush();
		fos.close();
	}
}