Struts (12): Exception handling: exception-mapping elements

• Configure declaration exception handling for the current action

1. There are 2 attributes in the exception-mapping element
Exception: Specifies the type of exception that needs to be caught
Result: Specifies a response result that will be executed when the exception is caught. That is, you can come from a declaration of the current action, or from a global-results declaration.

2. You can display the exception message through the <s:property> tab on the view.

• You can provide a global exception-capture mapping for your application through the global-exception-mappings element.

　1, but any exception-mapping element declared under the Global-exception-mappings element can only refer to a result element declared under the Global-results element.

• The declarative exception-handling mechanism is handled by the Exceptionmappinginterceptor interceptor.

　　1. When an exception declared by an exception-mapping element is captured, the Exceptionmappinginterceptor interceptor adds two objects to the Valuestack:

Exception: Exception object that represents the exception being caught
Exceptionstack: The stack containing the caught exception

Struts (12): Exception handling: exception-mapping elements