Data Validation with JSR-303

• Introduced Java Bean Validation
• Part of JEE 6 and above, suported by Spring since version 3
• Set of annotations used to validate Java Bean properties

JSR 380 - Bean Validation 2.0

• Added to Spring Framework 5.0
• Available in Spring Boot 2.0.0+
• Uses Hibnernate Validatior 6.0+
• Primary goal of Bean Validation 2.0 is Java 8 language features
• Added 11 new built in validation annotations

Built in Contstraint Definitions

• @Null - Checks value is null
• @NotNull - Checks value is not null
• @AssertTrue - Value is true
• @AssertFalse - What do you think?
• @Min - Number is equal to or higher
• @Max - Number is equal to or less
• @DecimalMin - Value is larger
• @DecimalMax - Value is less than
• @Negative - Value is less than zero. Zero invalid
• @NegativeOrZero - Value is less than or zero.
• @Positive
• @PositiveOrZero
• @Size - Checks if string or collection is between a min and max
• @Digits - checks for integer digits and fraction digits
• @Past - Checks if a date is in the past
• @PastOrPresent
• @Future
• @FutureOrPresent
• @Pattern - Checks against RegEx pattern
• @NotEmpty - Checks if value is null or empty (whitespace or empty collection)
• @NonBlank - Checks string is not null or not whitespace characters
• @Email - Checks if string value is an email address

Hibernate Validator Constraints

• @ScriptAssert - Class level annotation, checks class against script
• @CreditCardNumber - Verifies value is a credit card number
• @Currency - Valid currency ammount
• @DurationMax - Duration less than given value
• @DurationMin - Duration more than given value
• @EAN - Valid EAN barcode
• @ISBN - Valid ISBN value
• @Length - String length between given min and max
• @CodePointLength - Validates that code point length of the annotated character sequence is between min and max
• @LuhnCheck - Luhn check sum
• @Mod10Check - Mod 10 check sum
• @Mod11Check - Mod 11 check sum
• @Range - Checks if a number is between min and max (exlusive)
• @Safehtml - Checks for safe HTML
• @UniqueElements - Checks if collection has unqiue elements
• @Url - Checks for valid URL