@Null limit can only be null
@NotNull limit must not be null
@AssertFalse limit must be false
@AssertTrue limit must be true
@DecimalMax (value) must be restricted to a value not greater than a specified number
@DecimalMin (value) must be restricted to a value less than a specified number
@Digits (integer, fraction) must be restricted to a fraction, and can not exceed the number of bits of the integer part integer, can not exceed the number of fractional digits fraction
@Future limit must be a future date
@Max (value) must be restricted to a value not greater than a specified number
@Min (value) must be restricted to a value less than a specified number
@Past limit must be a date in the past
@Pattern (value) must comply with the restrictions specified regular expression
@Size (max, min) characters in length must be between limits at max min
@Past verify annotation element value (date type) earlier than the current time
@NotEmpty verified annotation element value is not null and is not empty (the string length is not 0, set size is not 0)
@NotBlank verified annotation element value is not empty (not null, the space after the removal of the first length of 0), unlike @ NotEmpty, @ NotBlank applied only in the comparison string and string removes spaces
@Email element value is verified annotation Email, regular expressions may be specified as an email address and a flag by a custom
