mybatis的update未成功修改一条数据时，返回的integer对象是null还是值为0的对象
在 MyBatis 中，如果 `update` 操作未成功修改任何数据，返回的整数通常是 `0` ，而不是 `null` 。 [2024-08-15 12:15:18 | AI写代码神器 | 35点数解答]
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