年少有为

select IFNULL((select distinct salary from Employee order by salary desc limit 1, 1), NULL) as SecondHighestSalary; Read More

1、树结构类 public class TreeNode<T> { T val; TreeNode<T> parent; TreeNode<T> right; TreeNode<T> left; public TreeNode(){ } public TreeNode(T val){ this.va Read More

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public class Tree { public static void main(String[] args) { Tree root = new Tree(50); Tree.insert(root, 30); Tree.insert(root, 60); Tree.insert(root, Read More

一、二分查找 二、动态调整 三、冒泡排序 四、快速排序 Read More

1、exclusions <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-mongodb</artifactId> <exclusions> <exclusio Read More

1、属性上添加注解： @JsonIgnore import com.fasterxml.jackson.annotation.JsonIgnore; @JsonIgnore @ApiModelProperty("属性") private Long sqlTotal; private int tota Read More

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