QueryWrapper 值不为空

QueryWrapper提供了许多方法用于构建查询条件，其中包括判断值是否为空的方法。要判断值是否为空，可以使用QueryWrapper的isNull()或isNotNull()方法。isNull()方法用于判断值为空或null，isNotNull()方法用于判断值不为空或null。通过使用这两个方法，可以在QueryWrapper中设置相应的条件来筛选出值为空或不为空的记录。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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- *1* [QueryWrapper方法解释](https://blog.csdn.net/m0_60536467/article/details/123501984)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v92^chatsearchT0_1"}}] [.reference_item style="max-width: 50%"]
- *2* *3* [mybatis使用QueryWrapper查询为空的问题，可能是接参的类型为基本变量的数组](https://blog.csdn.net/lvoelife/article/details/114411017)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v92^chatsearchT0_1"}}] [.reference_item style="max-width: 50%"]
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