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我们知道,如果你用Java的Sping Data 框架映射Pojo为MongoDB数据时,数据库中会自动给你添加一个_class字段,那这个字段是干嘛用的呢?我们可以不可以不要这个字段呢? 直接上结论:答案其实很简答,这个字段就是用...
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以前用的是5.7版本的MySQL,在学习实践Springboot的时候顺带升级了一下8.0,遇到了一些坑,在这记录一下,有碰到同类问题的童鞋需要自取。 使用 navicat连接发现报错1251- Client does not suppor...
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