validate money check struts2

        </field-validator>

        <field-validator type="regex">

          <param name="expression">

            ^(\$|\-\$|\$\-)?([1-9]{1}[0-9]{0,2}(\,[0-9]{3})*(\.[0-9]{0,2})?|[1-9]{1}[0-9]{0,}(\.[0-9]{0,2})?|0(\.[0-9]{0,2})?|(\.[0-9]{1,2})?)$

 </param>

            <message>${getText("errors.upto",{getText("category.description"),maxLength})}</message>

        </field-validator>

다른예..

<!--  ^\$?([1-9]{1}[0-9]{0,2}(\,[0-9]{3})*(\.[0-9]{0,2})?|[1-9]{1}[0-9]{0,}(\.[0-9]{0,2})?|0(\.[0-9]{0,2})?|(\.[0-9]{1,2})?)$ -->

간단한예..

12345.67 as a regex for this? 

^[0-9]{1,5}\.[0-9]{2}$ (doesn't compile in Eclipse) 
\b[0-9]{1,5}\.[0-9]{2}\b (doesn't compile in Eclipse) 
[0-9]{1,5}.[0-9]{2} (compiles, but is not correct) 

I'm using it like this btw: 
@RegexFieldValidator(key="validate.amount", fieldName="amount", 
message="", expression="[0-9]{1,5}\.[0-9]{2}") 

출처:http://regexlib.com/REDetails.aspx?regexp_id=196