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JDBC【事务、元数据、改造JDBC工具类】
source link: https://juejin.im/post/5a893e6cf265da4e93118847
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1.事务 一个SESSION所进行的所有更新操作要么一起成功，要么一起失败 举个例子:A向B转账，转账这个流程中如果出现问题，事务可以让数据恢复成原来一样【A账户的钱没变，B账户的钱也没变】。 事例说明： /* * 我们来模拟A向B账号转账的场
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