customize validation upload file http://jinnianshilongnian.iteye.com/blog/1990081 https://docs.spring.io/spring/docs/4.3.12.RELEASE/spring-framework-reference/htmlsingle/#validation-beanvalidation
customize validation upload file http://jinnianshilongnian.iteye.com/blog/1990081 https://docs.spring.io/spring/docs/4.3.12.RELEASE/spring-framework-reference/htmlsingle/#validation-beanvalidation