如果找不到驱动程序类，因为某些原因，罐子仍不路径。介意罐必须被称为库的文件夹中，而不是LIB。如果它好像什么都没有工作，这是另外一个问题，但错误信息可能应该是不同的。

If the driver class is not found, because of some reasons the jar is still not in the path. Mind that jars must be in the folder called "libs", not "lib". If it will work as if nothing, that is another question, but the error message probably should be different.