mybatis-plus之实现in嵌套sql的教程_F11 - 专业站长和开发者的学习网站

mybatis-plus实现in嵌套sql

今天使用jeegboot看源码时发现用户权限部分的代码

条件查询的inSql方法的用法：

即sql中的 in (select column from table where 条件) 用法

/**

* 根据部门 Id 和 QueryWrapper 查询

* @param page

* @param departId

* @param queryWrapper

* @return

@Override

public IPage<SysUser> getUserByDepartIdAndQueryWrapper(Page<SysUser> page, String departId, QueryWrapper<SysUser> queryWrapper) {

LambdaQueryWrapper<SysUser> lambdaQueryWrapper = queryWrapper.lambda();

lambdaQueryWrapper.eq(SysUser::getDelFlag, "0");

lambdaQueryWrapper.inSql(SysUser::getId, "SELECT user_id FROM sys_user_depart WHERE dep_id = '" + departId + "'");

return userMapper.selectPage(page, lambdaQueryWrapper);

}

示例：

@Select("<script>" +

"SELECT * FROM node mn " +

"WHERE n.state IN " +

"<foreach item = 'state' collection = 'states' index = 'index' open = '(' separator = ',' close = ')'>" +

"#{state}" +

"</foreach>" +

"</script>")

List<Node> queryIdAndPlanDay(List states);

SQL语句需要使用<script></script>包起来，接着使用foreach进行循环，再将循环后得到的值放入sql中就ok了