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Validates a field using an OGNL expression.
fieldName
- The field name this validator is validating. Required if using Plain-Validator Syntax otherwise not required.expression
- The Ognl expression (must evaluate to a boolean) which is to be validated the stack.<!-- Plain Validator Syntax --> <validators> <!-- Plain Validator Syntax --> <validator type="fieldexpression"> <param name="fieldName">myField</param> <param name="expression"><![CDATA[#myCreditLimit > #myGirfriendCreditLimit]]></param> <message>My credit limit should be MORE than my girlfriend</message> <validator> <!-- Field Validator Syntax --> <field name="myField"> <field-validator type="fieldexpression"> <param name="expression"><![CDATA[#myCreditLimit > #myGirfriendCreditLimit]]></param> <message>My credit limit should be MORE than my girlfriend</message> </field-validator> </field> </validators>