MybatisPlus之LambdaQueryWrapper简单用法

简单查询（推荐）

LambdaQueryWrapper<User> wrapper = new LambdaQueryWrapper<>();
wrapper.eq(User::getUserId, id);
wrapper.like(User::getUserName, userName);
List<User> users= userService.selectList(wrapper); 

链式查询（不推荐）

List<User> users= new LambdaQueryChainWrapper<>(userService)
                        .eq(User::getUserId, id)
                        .list();

BannerItem bannerItem = new LambdaQueryChainWrapper<>(userService)
                        .eq(User::getUserId, id)
                        .one();

判断条件参考

参考链接：

https://blog.csdn.net/liuxing201122013/article/details/120874343

http://events.jianshu.io/p/aec36a1bd2ec