STRUTS2 Custom Validation rules

Custom validation rules: (Learn)

In the Struts2 custom check rule:

1. Implement a validator interface.

2. Inherit Validatorsupport or Fieldvalidatorsupport in general development

* Validatorsupport: Not for a field check. Check confirmation password (compared to password field)

* Fieldvalidatorsupport: Check for a field.

Steps:

1. Writing a class inheritance Fieldvalidatorsupport

public void Validate (Object obj) throws Validationexception {

Get field Name

String name = GetFieldName ();

Get the value of a field

Object value = GetFieldValue (name, obj);

Judging this value

if (value instanceof Integer) {

Integer i = (integer) value;

if (I < 0) {

Addfielderror (name, obj);

}

}

}

2. Register the Validator: Create a validators.xml under SRC

* The introduction of the Dtd:xwork core package has a XWORK-VALIDATOR-CONFIG-1.0.DTD

* Configure in this XML:

<validators>

<validator name= "AAA" class= "Cn.itcast.struts2.demo5.MyAgeValidator" ></validator>

</validators>

STRUTS2 Custom Validation rules