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MyBatis Plus通用CRUD与条件构造器使用及SQL自动注入原理分析

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By Class mapperClass, Class modelClass, table.getTable Name, SqlCommand Type.DELETE
| dasizhe.cn
首先根据MyBatis Plus入门实践详解 搭建好工程。然后创建数据库表与相关的类。 表结构如下： EmployeeMapper接口继承自BaseMapper<Employee> 这个BaseMapper是com.baomidou.mybatisplus.mapper.BaseMapper。这里测试的MyBatis Plus版本是： BaseMapper定义了常用的增删改查接口，继承该接口后无需编写mapper.xml文件，即可获得通用的CRUD功能。 当然你可以在这个employeeMapper里面自定义方法，方法通过注解或者mapper.xml里面insert|update|select|delete实现。 ① insert 测试代码如下： 测试结果如下： 结论： insert方法在插入时， 会根据实体类的每个属性进行非空判断，只有非空的属性对应的字段才会出现到SQL语句中 ② insertAllColumn 测试代码如下： 测试结果如下： 结论 insertAllColumn方法在插入时， 不管属性是否非空， 属性所对应的字段都会出现到SQL语句中。 ①...
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