Customizing Stripes Messages - Stripes...and Java Web Development is Fun Again - page 117

Combining Global and Field-Specific Errors
You can create error messages that are not associated with a
specific field with the addGlobalError ( ) method of the Validation-
Errors class. These global errors will not be displayed if you have
only <s:errors field="..."/> tags. Adding the plain <s:errors/> tag
displays global errors but duplicates the field-specific error mes-
sages. To combine the display of global and field errors, add
the globalErrorsOnly= "true" attribute to the <s:errors/> tag. This
way, you can display global errors in a group and field-specific
errors next to fields:
<s:form ...>
<s:errors globalErrorsOnly="true"/>
...
<td>Email:</td>
<td><s:text name="contact.email"/></td>
<td><s:errors field="contact.email"/></td>
...
</s:form>
Highlighting the labels and text fields that are in error is now a simple
matter of some CSS code:
Download email_10/web/css/style.css
input.error {
border: 2px solid #880000;
background-color: #FFDDDD;
}
label.error {
color: #880000;
font-weight: bold;
text-decoration: underline;
}
This will highlight errors as shown in Figure 6.7 , on the next page.
Notice that both the labels and the fields that are in error are high-
lighted.
If the error class is not enough to highlight tags as we require, we can
take full control of how tags are rendered when they are in error by
implementing the TagErrorRenderer interface:
public interface TagErrorRenderer {
void init(InputTagSupport tag);
void doBeforeStartTag();
void doAfterEndTag();
}