jquery - Java BeanValidation Spring -

background. using spring dependency injection , struts2 running on tomcat server.

when doing bean validation take 2 layer approach.

1. run validation on client side (for using jquery validation plugin) before form submitted server check formed/complete forms.
2. run bean validation @ server using annotations on beans them-self stop database blowups in event circumvents client side validation.

the problem:

keeping track of 2 sets of validation criteria gets bit of pain... error message easy keep track of because can stick them messages.properties file , message lookup both bean , jsp page. real problem numbers.

for example, let have checklist string variable notes. min size 10 max size 2000 @ release. 3 months down road see 2000 not cutting , need increase size limit 4000 max. have 2 places go , change number.

java bean validation annotation:

@entity public class checklist{   @size(min = 10, max = 2000, message = "{checklist.size}")   private string notes; } 

jquery form validation:

$("#someform").validate({   rules:{     'checklist.notes':{       minlength:10,       maxlength:2000     }   } }); 

is there way can reuse number in same way can reuse message?

use constant generic purpose class or interface. inject jsp jquery script struts <s:property/> tag.

this way, when change constant value, new value automatically read java classes , jsp pages no need alter code or replace something.

base class, interface, or whatever containing constants

public static final int min_lenght = 20; public static final int max_lenght = 4000; 

action (that implements / extends class above constants)

@entity public class checklist{   @size(min = min_lenght, max = max_lenght, message = "{checklist.size}")   private string notes; } 

jsp

$("#someform").validate({   rules:{     'checklist.notes':{       minlength:<s:property value="@my.package.constantclass@min_lenght" />,       maxlength:<s:property value="@my.package.constantclass@max_lenght" />     }   } }); 

remember set struts.ognl.allowstaticmethodaccess true in struts.xml