参考：java中集合Collection转list对象(https://www.oschina.net/action/GoToLink?urlhttps%3A%2F%2Fblog.csdn.net%2Fqq_27908393%2Farticle%2Fdetails%2F82020704)首先我的需求是获取到购物车列表，购物车列表是一个Map对象，构

Collection├List│├LinkedList│├ArrayList│└Vector│　└Stack└SetMap├Hashtable├HashMap└WeakHashMapCollection接口　　Collection是最基本的集合接口，一个Collection代表一组

SELECTGROUP\_CONCAT(column\_name)FROMtable\_namegroupbytable\_name,table\_name2...FIELD()函数自定义排序select\fromuserwheretypein(1,2,3)orderbyFIELD(column,str1,st

include<stdio.hinclude<stdlib.hdefineboolintdefinetrue1definefalse0structList{  structNode\ptrNode;  intnLen;};structNode{

emoveallelementsfromalinkedlistofintegersthathavevalue _val_.Example:Input:1263456,_val_6Output:12345实现：publicst

<divid"cnblogs\_post\_body"class"blogpostbody"<p<spanstyle"fontsize:18pt"1.后台接收json数组转成封装实体类的List：</span</p<divclass"cnblogs\_code"<divclass"cnblogs\_code\_tool

<algorithmstd::sort(first,last,cmp);使用的范围是\first,last)省略cmp，使用sort(first,last),则默认从小到大排序。使用sort(first,last,gr

1、批量插入<insertid"insertBatch"parameterType"java.util.List"insertintot_student(name,age,class)values<forea

一共100万，按照长度排序后的前2000个：aagst.cnacyke.wsaefrd.ccaiqxg.ukakplh.pwalurx.pwamsmz.ccaogtp.inawwgf.inayveg.pwbdpch.ccbeemu.pwbetam.wsbfnll.wsbf