乍一看似乎不是***的解决方案，但这取决于您的要求.

It may seem like not the best solution at first sight, but it depends on your requirements.

您可以为所有控制器设置一个具有最大上传大小的全局选项，并为特定控制器使用较小的值覆盖它.

You can set a global option with maximum upload size for all controllers and override it with lower value for specific controllers.

application.properties 文件(Spring Boot)

application.properties file (Spring Boot)

spring.http.multipart.max-file-size=50MB

使用检查上传控制器

public void uploadFile(@RequestPart("file") MultipartFile file) {
    final long limit = 2 * 1024 * 1024;    // 2 MB
    if (file.getSize() > limit) {
        throw new MaxUploadSizeExceededException(limit);
    }
    StorageService.uploadFile(file);
}

如果文件大于 2MB，您将在日志中看到此异常:

In case of a file bigger than 2MB you'll get this exception in log:

org.springframework.web.multipart.MaxUploadSizeExceededException: Maximum upload size of 2097152 bytes exceeded