例如,类加载器尝试在"org.gjt.mm.mysql“包中加载和链接驱动程序类。如果成功,则调用静态初始化程序。Class.forName("org.gjt.mm.mysql.Driver");
Connection con = DriverManager.getConnection(url,"myLogin"所有JDBC驱动程序都有一个向DriverManager注册自己的静态块,而DriverManager只有静态</em
我有一个表User,它在静态hasMany grails下的User类中定义了许多子表。ERROR 1451: Cannot delete or update a parent row: a foreign key constraint fails (`test_db`user` WHERE `id`='3