摘要: 今天系统的学习了对数据库查看的语句,用途为查重 public boolean chachong(String a) { Connection connection = mql.getConnection(); PreparedStatement preparedStatement = null; b 阅读全文
posted @ 2020-11-08 20:26 不详·Christina 阅读(28) 评论(0) 推荐(0)