I got a error info in tag library listbox of use custom tags floater, it seem 
that i should add a 
servelt-mapping in web.xml of TLDParser: 

<servlet-mapping> 
    <servlet-name>TLDParser</servlet-name> 
    <url-pattern>*</url-pattern> 
</servlet-mapping> 

Another problem is when live data a jsp page, <html:errors/> is changed 
<html:errors>, '/' is 
lost, got a error info when refresh live data, beause bodycontent of ErrorsTag 
must be empty.