Question

I am trying to validate textbox in struts2 application of Jsp page. It should accept alphanumeric or alphabet.

I have used following code in validation.xml file:

<validator type="requiredstring">
    <param name="fieldname">productName</param>
    <message>Please select product Name.</message>
</validator>

<validator type="regex">
    <param name="fieldname">productName</param>
    <param name="expression">^[,a-zA-Z0-9 ]*$</param>
    <message>Product name should accept only in AlphaNumeric.</message>
</validator>

Field name: product Name
Valid Input: abcdABC123(Alphanumeric), abcABC(alphabet)
Invalid: 123(Numeric)

Can anyone please help me to solve this issue. Thanks in Advance.

Answer 1

Use this regex:

<param name="expression"><![CDATA[^(?=.*[a-zA-Z])[,a-zA-Z0-9]*$]]></param>

Please read about MUST CONTAIN expression from here:

http://www.mkyong.com/regular-expressions/how-to-validate-password-with-regular-expression/