Java Runtime Exceptions

1
Java Runtime Exceptions

• You can provide your own exception handling
  within JSP pages
• In addition to that, JSP provides a mechanism for
  handling runtime exceptions
• lt _at_ page isErrorPagefalse errorPageerrorHand
  ler.jsp gt
• ? any uncaught exception is forwarded to the JSP
  script errorHandler.jsp

2
Java Runtime Exceptions

• Inside errorHandler.jsp, we need the following
  page directive
• lt_at_ page isErrorPagetrue gt
• This allows the Throwable object describing the
  exception to be accessed within errorHandler.jsp
  through the implicit exception object

3
Java Runtime Exceptions

• test.jsp
• lt_at_ page isErrorPagefalse errorPageerrorHand
  ler.jsp gt
• lt
• String number 67h
• int n Integer.parseInt( number )
• gt

4
Java Runtime Exceptions

• errorHandler.jsp
• lt_at_ page isErrorPagetrue gt
• lt
• // use implicit object exception
• out.println( exception.toString( ) )
• gt