java - 什么是 Java 中的异常包装？

Question

什么是 Java 中的异常包装？它在异常处理中有什么用？它与异常传播有何不同？

Answer 1

Exception wrapping is when you catch an exception, wrap it in a different exception and throw that exception.

Here is an example:

 try{
       dao.readPerson();
 } catch (SQLException sqlException) {
       throw new MyException("error text", sqlException);
 }

来源:http://tutorials.jenkov.com/java-exception-handling/exception-wrapping.html

另一方面

Exception Propagation: An exception is first thrown from the top of the stack and if it is not caught, it drops down the call stack to the previous method, if not caught there, the exception again drops down to the previous method, and so on until they are caught or until they reach the very bottom of the call stack.

来源:http://www.javatpoint.com/exception-propagation