...
Step 1
Create the jsp page
...
{snippet:id=fieldValidatorsExample|lang=xml|javadoc=false|url=struts2/apps/showcase/src/main/webapp/WEB-INF/validation/fieldValidatorsExample.jsp}
Step 2
Create the action class
...
{snippet:id=fieldValidatorsExample|javadoc=false|lang=java|url=struts2/apps/showcase/src/main/java/org/apache/struts2/showcase/validation/FieldValidatorsExampleAction.java}
Step 3
Create the validator.xml.
...
{snippet:id=fieldValidatorsExample|javadoc=false|lang=xml|url=struts2/apps/showcase/src/main/resources/org/apache/struts2/showcase/validation/FieldValidatorsExampleAction-submitFieldValidatorsExamples-validation.xml}