java - Spring Boot，如何基于每个 Controller 或requestmapping设置MultipartFile大小限制

如何基于每个控制器或请求映射设置MultipartFile大小限制

我认为这是全球背景。

spring.servlet.multipart.max-file-size=10MB
spring.servlet.multipart.max-request-size=10MB

如果我有两个端点。

1.POST /图片此路径应限制为1M

2.POST /视频此路径应限制为50M

如何限制每个端点？

最佳答案

您必须声明MultipartResolver类型的Bean

@Bean
public MultipartResolver multipartResolver() {
    CommonsMultipartResolver multipartResolver
      = new CommonsMultipartResolver();
    multipartResolver.setMaxUploadSize(10485760)
    return multipartResolver;

下面的控制器将帮助您限制大小。如果超出上传大小，则将提供MaxUploadSizeExceededException

@RequestMapping(value = "/images", method = RequestMethod.POST)
public ModelAndView uploadFile(MultipartFile file) throws IOException {

    ModelAndView modelAndView = new ModelAndView("file");
    InputStream in = file.getInputStream();
    File currDir = new File(".");
    String path = currDir.getAbsolutePath();
    FileOutputStream f = new FileOutputStream(
      path.substring(0, path.length()-1)+ file.getOriginalFilename());
    int ch = 0;
    while ((ch = in.read()) != -1) {
        f.write(ch);
    }

    f.flush();
    f.close();

    modelAndView.getModel().put("message", "File has  uploaded" );
    return modelAndView;
}