Pat*_*eck 3 java mysql error-handling exception-handling exception
我试图用MySQLin 来捕获一个特定的异常Java.但是,它正在运行catch (SQLException ex)而不是我想要的那个.
catch (MySQLIntegrityConstraintViolationException ex) {
}
catch (SQLException ex) {
}
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得到以下错误,我希望它运行该catch (MySQLIntegrityConstraintViolationException ex)功能.
11:12:06 AM DAO.UserDAO createUser
SEVERE: null
com.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityConstraintViolationException: Duplicate entry 'idjaisjddiaij123ij' for key 'udid'
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它为什么运行catch (SQLException ex)而不是catch (MySQLIntegrityConstraintViolationException ex)?