Supported Validations

From JSR-303:

@AssertFalse	Checks if input value == 'false'
@AssertTrue	Checks if input value == 'true'
@DecimalMax	Checks if input value <= params.value
@DecimalMin	Checks if input value >= params.value
@Digits	Checks if input value has <= params.integer integer digits and <= params.fraction fraction digits
@Max	Checks if input value <= params.value
@Min	Checks if input value >= params.value
@NotNull	Checks if input value is not empty
@Null	Checks if input value is empty (this constraint doesn't really make sense when dealing with HTML forms)
@Pattern	Checks if input value matches params.regexp, using optional params.flags (only 'CASE_INSENSITIVE' is supported at this time, as there are no obvious equivalents in JavaScript regular expressions for the other Java regular expression flags)
@Size	Checks if input value length >= params.min and <= params.max
@Future	Checks if input value is a date in the future (you must provide a simple date format in a JSON object in the body of the validate tag)
@Past	Checks if input value is a date in the past (you must provide a simple date format in a JSON object in the body of the validate tag)

From Hibernate Validator:

@Email	Checks if input value is a valid e-mail address using regular expressions
@Length	Checks if input value.length >= params.min and <= params.max
@NotEmpty	Checks if input value contains characters other than white space
@Range	Checks if input value <= params.min and >= params.max