java - Displaying Validation Error Messages in Struts2 -

i new struts 2, have worked in struts 1 earlier.

how can bind error message ui component (e.g. text box) ? don't want error message global one.

for achieving same in struts 1:

in form validate method, used this:

actionerrors errors = new actionerrors();        if(username != null && username.length() <= 0)     errors.add("username",new actionerror("error.username.required")); 

and in ui, displaying message:

<html:messages id="username" property="username">     <bean:write name="username"/> </html:messages> 

in struts 2, if extend action class actionsupport , use this:

addactionerror(gettext("please enter userid")); 

then seems global message can displayed in ui using:

<s:actionerror /> 

hence not sure how achieve same functionality in struts 2. kindly let me know on this.

the <s:fielderror> tag closest equivalent:

<s:fielderror fieldname="username" /> 

on java side you'd use validationaware.addfielderror add field-specific messages:

public class anyaction extends actionsupport {     public void validate() {         addfielderror("username", "user id required");     } } 

that said, low-level validations, i'd stick default xml-based mechanism when possible, since lot of work you, , makes working i18n/properties little easier.