mybatisPlus 如何通过实体类找到数据库表的，@Table，驼峰映射规则

缺乏、安全感 2023-10-07 18:22 35阅读 0赞

## 1、不用@Table注解 ##

数据库表名叫users，entity的类名叫Users，刚好驼峰命名法，程序没有出错，数据正常读出，如图  
![在这里插入图片描述][watermark_type_d3F5LXplbmhlaQ_shadow_50_text_Q1NETiBA5YyX6aOOdG90bw_size_20_color_FFFFFF_t_70_g_se_x_16]  
![在这里插入图片描述][watermark_type_d3F5LXplbmhlaQ_shadow_50_text_Q1NETiBA5YyX6aOOdG90bw_size_20_color_FFFFFF_t_70_g_se_x_16 1]

## 2、把entity里面的Users改名叫Userss，程序直接报错 ##

异常为

java.sql.SQLSyntaxErrorException: Table 'demo.userss' doesn't exist
    ; bad SQL grammar []; nested exception is java.sql.SQLSyntaxErrorException: Table 'demo.userss' doesn't exist

![在这里插入图片描述][watermark_type_d3F5LXplbmhlaQ_shadow_50_text_Q1NETiBA5YyX6aOOdG90bw_size_20_color_FFFFFF_t_70_g_se_x_16 2]

## 3、使用@Table注解 ##

![在这里插入图片描述][watermark_type_d3F5LXplbmhlaQ_shadow_50_text_Q1NETiBA5YyX6aOOdG90bw_size_20_color_FFFFFF_t_70_g_se_x_16 3]

## 总结 ##

具体的找表方法有两种：

1、默认：采用驼峰映射规则，例如 Users 对应的数据库表为 users，MyUserTable 对应的数据库表为 my\_user\_table ;

2、注解@TableName 在类名上方添加@TableName

参考文档：[mybatisPlus 实体类与数据库表映射关系][mybatisPlus]

[watermark_type_d3F5LXplbmhlaQ_shadow_50_text_Q1NETiBA5YyX6aOOdG90bw_size_20_color_FFFFFF_t_70_g_se_x_16]: https://img-blog.csdnimg.cn/332da4d4510a4f7f8ee022c447db719f.png?x-oss-process=image/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBA5YyX6aOOdG90bw==,size_20,color_FFFFFF,t_70,g_se,x_16
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[mybatisPlus]: https://blog.csdn.net/lizhiguo18/article/details/109363797?ops_request_misc=%257B%2522request%255Fid%2522%253A%2522164691114916780264074212%2522%252C%2522scm%2522%253A%252220140713.130102334.pc%255Fall.%2522%257D&request_id=164691114916780264074212&biz_id=0&utm_medium=distribute.pc_search_result.none-task-blog-2~all~first_rank_ecpm_v1~rank_v31_ecpm-4-109363797.pc_search_result_cache&utm_term=mybatis-plus+%E5%88%A4%E5%AE%9A%E8%A1%A8%E5%92%8C%E5%AE%9E%E4%BD%93%E7%9A%84%E6%98%A0%E5%B0%84&spm=1018.2226.3001.4187