j2ee: Implementing a Tag Handler [9/27]

To implement a tag handler:

• Extend:
  • TagSupport for empty tags
  • BodyTagSupport for non-empty tags
  • SimpleTagSupport for simple non-empty tags
  • TagAdapter for SimpleTags that need to work as classic tags
• Define the attributes of the tag (follow the JavaBeans design pattern for setters)
• Define one or more of the following methods
  • doTag() -- for Simple Tags
  • doStartTag()
  • doEndTag()
  • doInitBody()
  • doAfterBody()