首页 > 数据库> > Cannot invoke “java.sql.Connection.prepareStatement(String)“because “this.conn“ is null Cannot invoke “java.sql.Connection.prepareStatement(String)“because “this.conn“ is null 2021-01-13 21:59:50 作者:互联网 就是jar包太老了,数据库是新版本的,用8以上的connector 标签:because,java,String,invoke,prepareStatement,jar 来源: https://blog.csdn.net/qq_42583263/article/details/112593995