MyBatis-Plus Lambda 常用查詢

原文：
https://www.jianshu.com/p/07be9ccb3306
https://www.cnblogs.com/java688/p/13672075.html
https://baomidou.gitee.io/mybatis-plus-doc/#/wrapper?id=條件參數說明
https://blog.csdn.net/lt326030434/article/details/106571670

從數據庫中查找一個元素

public Brand getByName(String name) {
	return new LambdaQueryChainWrapper<>(baseMapper)
		.eq(Brand::getName, name)
		.one();
}

Order order = this.getOne(new LambdaQueryWrapper<Order>()
	.ge(Order::getCreateTime, todayStart)
	.le(Order::getCreateTime, todayEnd)
	.orderByDesc(Order::getOrderSn).last("LIMIT 1"));

從數據庫帶條件查詢 獲取list

List<Store> stores = new LambdaQueryChainWrapper<>(baseMapper)
	.eq(Store::getName, storeName)
	.list();

從list中查找一個元素

Order order = orders.stream()
	.filter(item -> Func.equals(item.getPlatformOrderSn(), platformOrderSn))
	.findFirst()
	.orElse(null);