In this tutorial you will learn about the Bean Validation (JavaBeans Validation).
JSF Bean Validation Tutorial
In this tutorial you will learn about the Bean Validation (JavaBeans Validation).
Bean Validation (JavaBeans validation) is a model of validation that is newly introduced in Java EE 6 platform. Support of Bean validation is given by using the annotation constraint by putting it with the field, method, or class of a JavaBeans component (wherever required). Constraints that support the Bean Validation can be a custom or built in constraint. Custom constraint is called user-defined constraint and the constraint available to use is called built in constraint. Some of the built in constraint are available in the javax.validation.constraints package. JSF 2.x.x provides the built in integration with JSR 303 constraints.
Some of the annotation constraints are given into the table :
| Annotation Constraints | Description |
| @AssertFalse | Validate to false value for the field or property. |
| @AssertTrue | Validate to true value for the field or property. |
| @DecimalMax | Validate to the decimal value for the field or property less than or equals to the defined number in the value element. |
| @DecimalMin | Validate to the decimal value for the field or property greater than or equals to the defined number in the value element. |
| @Digits | Validate to the number for the field or property within the specified range. |
| @Future | Validate to the date value in future for the field or property. |
| @Max | Validate to the integer number for the field or property lower than or equal to the defined number in the value element. |
| @Min | Validate to the integer number for the field or property greater than or equal to the defined number in the value element. |
| @NotNull | Validate to the field or property must not be null |
| @Null | Validate to the field or property must be null. |
| @Past | Validate to the date value in the past for the field or property. |
| @Pattern | Validate the field or property to match the regular expression with the defined regexp element. |
| @Size | Validate to the field or property for the specified size or boundries. |
Click Here to See the example of JSF validateBean tag.
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