1、需求：把sql结果集，相同的id合并，不同的name合并 （适用于mysql）例子：selecto.eventtypeid,o.eventtypename,o.parentid,o.eventtypelevel,o.orderid,o.createdate,group_concat( org.name ) as quzhiname ,修改 editbtn fromevent_type_info oleft join t_eventtype_quzhi_relation rel on rel.eventtypeid = o.eventtypeid and rel.status = 1left join sys_organization_info org on org.guid = rel.quzhiid and org.s...
摘要：不多说直接上代码import java.util.ArrayList;public class BSTMap<K extends Comparable<K>, V> implements Map<K, V> {private class Node{public K key;public V value;public Node left, right;public Node(K key, V value){this.key = key;this.value = value;left = null;right = null;}}private Node root;private int size;public BSTMap(){root = null;size = 0;}@Overridepublic int getSize(){return size;}@Over...