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RSS订阅转载 Quartz conTrigger 定时器表达式大全
CronTrigger配置格式:格式: [秒] [分] [小时] [日] [月] [周] [年] 序号说明 是否必填 允许填写的值允许的通配符 1 秒 是 0-59 , - * / 2 分 是 0-59 , - * / 3小时 是 0-23 , - * /
2017-08-14 11:16:37
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转载 mybatis "There is no getter for property named 'xx' in 'class java.lang.String"问题
用mybatis查询时，传入一个字符串参数，且进行判断时，会报There is no getter for property named 'xx' in 'class java.lang.String的错误．例： SELECT a.id, c.coa_name, c.stu_name, c.cou_name, c.station, c.grade, c.clazz
2016-05-19 13:08:31
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转载 leetcode难度及面试频率
转载自：LeetCode Question Difficulty Distribution 1Two Sum25arraysort setTwo Pointe
2016-04-19 15:48:15
674
转载 操作系统面试题总结
转自 http://blog.csdn.net/zz198808/article/details/78877351．什么是进程（Process）和线程（Thread）？有何区别？进程是具有一定独立功能的程序关于某个数据集合上的一次运行活动，进程是系统进行资源分配和调度的一个独立单位。线程是进程的一个实体，是CPU调度和分派的基本单位，它是比进程更小的能独立运行的基本单
2016-04-12 22:58:58
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转载 Java面试宝典2015版（绝对值得收藏超长版）（一）
题目，日积月累，等到出去面试时，一切都水到渠成，面试时就自然会游刃有余了。答题时，先答是什么，再答有什么作用和要注意什么（这部分最重要，展现自己的心得）答案的段落分别，层次分明，条理清晰都非常重要，从这些表面的东西也可以看出一个人的习惯、办事风格、条理等。要讲你做出答案的思路过程，或者说你记住答案的思想都写下来。把答题想着是辩论赛。答题就是给别人讲道理、摆事实。答题不局限于
2016-03-30 10:48:03
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原创 mysql导入导出sql文件
导出无需进入数据库mysqldump -h localhost -u root -p [导出数据库名] > [导出路径 ＋ sql文件名]例：mysqldump -h localhost -u root -p dbTest >home/myDbTest.sql导入先建好数据库后source [sql文件路径]例：source /home/myDbTest.s
2016-03-29 18:53:37
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转载 HIBERNATE与 MYBATIS的对比
转自：http://www.cnblogs.com/inspurhaitian/p/4647485.html我是一名java开发人员，hibernate以及mybatis都有过学习，在java面试中也被提及问道过，在项目实践中也应用过，现在对hibernate和mybatis做一下对比，便于大家更好的理解和学习，使自己在做项目中更加得心应手。第一方面：开发速度的对比就开发速
2016-03-25 11:10:53
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原创 远程连接Mysql服务器问题
当出现 Can"t connect to MYSQL server on 'IP地址'; 问题时：1.检查服务器mysql服务是否打开 service mysql start2.若已经打开，在etc/mysql/my.cnf 中将 bind-address = 127.0.0.1 注释掉3.重启mysql服务后，mysql -h IP地址 -P 3306 -u ro
2016-03-16 11:58:44
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转载 IntelliJ IDEA 中文乱码问题解决办法（转）
转自 http://www.cnblogs.com/xingma0910/p/4651889.html自己最近在使用IntelliJ IDEA，发现总是出现中文乱码的问题，在网上找了很多教程，发现真是“天下文章一大抄”。还不如自己动手试着解决一下。1、编辑器以及调试信息中文乱码问题解决方案：选择：File->settings->Editor->File Encodi
2016-03-04 16:47:11
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原创 标签id为字符串形式，如何通过该字符串寻找标签
$("标签类型[id="+字符串+"]").内容 $("td[id="+idD+"]").css("background-color", "#ff6347");
2016-02-28 22:04:59
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原创 Css弹出菜单样式
.tishi{ position:relative; /*这个是关键*/ z-index:2; font-size: 80% ;}.tishi:hover{ z-index:3; background:none; /*没有这个在IE中不可用*/}.tishi span{ display: none;}.tishi:hover span{ /
2016-02-24 17:16:06
536
原创 codeforces 585A Gennady the Dentist
Gennady is one of the best child dentists in Berland. Today n children got an appointment with him, they lined up in front of his office.All children love to cry loudly at the reception at the dentist.
2015-10-13 21:35:48
713
原创 codeforces 556A Case of the Zeros and Ones
Andrewid the Android is a galaxy-famous detective. In his free time he likes to think about strings containing zeros and ones.Once he thought about a string of length n consisting of zeroes and ones. C
2015-10-11 19:57:35
980
原创 codeforces 556B Case of Fake Numbers
Andrewid the Android is a galaxy-famous detective. He is now investigating a case of frauds who make fake copies of the famous Stolp’s gears, puzzles that are as famous as the Rubik’s cube once was.Its
2015-10-11 19:54:31
501
原创 codeforces 551B ZgukistringZ
Professor GukiZ doesn’t accept string as they are. He likes to swap some letters in string to obtain a new one.GukiZ has strings a, b, and c. He wants to obtain string k by swapping some letters in a,
2015-10-11 19:44:52
709
原创 codeforces 581C Developing Skills
Petya loves computer games. Finally a game that he’s been waiting for so long came out!The main character of this game has n different skills, each of which is characterized by an integer ai from 0 to
2015-10-10 19:15:42
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原创 codeforces 581D Three Logos
Three companies decided to order a billboard with pictures of their logos. A billboard is a big square board. A logo of each company is a rectangle of a non-zero area.Advertisers will put up the ad onl
2015-10-10 19:10:04
510
原创 codeforces 583C GCD Table
The GCD table G of size n × n for an array of positive integers a of length n is defined by formula Let us remind you that the greatest common divisor (GCD) of two positive integers x and y is the g
2015-10-10 19:03:27
878
原创 codeforces 584B Kolya and Tanya
Kolya loves putting gnomes at the circle table and giving them coins, and Tanya loves studying triplets of gnomes, sitting in the vertexes of an equilateral triangle.More formally, there are 3n gnomes
2015-10-10 18:55:57
913
原创 codeforces 584C Marina and Vasya
Marina loves strings of the same length and Vasya loves when there is a third string, different from them in exactly t characters. Help Vasya find at least one such string.More formally, you are given
2015-10-10 18:45:31
614
原创 codeforces 584D Dima and Lisa
Dima loves representing an odd number as the sum of multiple primes, and Lisa loves it when there are at most three primes. Help them to represent the given number as the sum of at most than three prim
2015-10-10 18:35:11
812
原创 codeforces 577A Multiplication Table
Let’s consider a table consisting of n rows and n columns. The cell located at the intersection of i-th row and j-th column contains number i × j. The rows and columns are numbered starting from 1.You
2015-10-10 17:06:03
1044
原创 uva 1151 Buy or Build （最小生成树）
uva 1151 Buy or Build题目大意：给出n个点以及m种套餐，每种套餐的数据包括改套餐所包含点的数量，该套餐的费用，以及改套餐所包含的具体的点的编号。点与点之间的费用是他们的欧几里得距离的平方。现在问，在使用套餐的情况下连接所有点的最小费用。套餐可以叠加。解题思路：先求出不用套餐构造最小生成树的最小费用。然后开始枚举用或不用改套餐构造最小生成树的费用（二进制枚举子集），维护该费用，最小
2015-10-10 16:50:05
523
原创 uva 11324 The Largest Clique（强连通分量 + DAG）
uva 11324 The Largest Clique题目大意：给出一个有向图，要求出该图中的最大结点集。结点集满足下列条件，结点集中的每两个点u, v，要么u可以到达v，要么v可以到达u，要么互相可达。解题思路：在原图的基础上，先求一次强连通分量。然后把每个强连通分量都缩成点之后，可以得到一个有向无环图，然后可以用dp，求出最大嵌套。#include <cstdio>#include <cst
2015-09-16 14:17:45
366
原创 uva 12167 Proving Equivalences（强连通分量 + 缩点）
uva 12167 Proving EquivalencesDescription Consider the following exercise, found in a generic linear algebra textbook.Let A be an n × n matrix. Prove that the following statements are equivalent:A is
2015-09-15 21:10:23
449
原创 uva 10816 Travel in Desert （最小生成树 + 最短路）
uva 10816 Travel in DesertDescriptionThere is a group of adventurers who like to travel in the desert. Everyone knows travelling in desert can be very dangerous. That’s why they plan their trip careful
2015-09-12 14:15:10
608
原创 uva 11183 Teen Girl Squad （最小树形图）
uva 11183 Teen Girl Squad题目大意：你有一个好消息要告诉你的n-1个朋友，不过你们不在同一个地方，因此只能靠打电话。给出m个三元组（u, v, w）表示u打电话给v要花w的钱（v不能给u打电话）,你的任务是用最少的总费用把这个好消息通知到所有人。解题思路：有向的最小生成树。最小树形图，用朱刘算法。#include <cstdio>#include <cstring>#in
2015-09-11 16:53:07
434
原创 poj 1679 The Unique MST （次小生成树）
poj 1679 The Unique MSTDescription Given a connected undirected graph, tell if its minimum spanning tree is unique.Definition 1 (Spanning Tree): Consider a connected, undirected graph G = (V, E). A sp
2015-09-09 17:03:34
346
原创 uva 1494 Qin Shi Huang's National Road System （次小生成树）
uva 1494 Qin Shi Huang's National Road SystemDescriptionDuring the Warring States Period of ancient China(476 BC to 221 BC), there were seven kingdoms in China ---- they were Qi, Chu
2015-09-09 16:34:49
613
原创 uva 10600 ACM Contest and Blackout （次小生成树）
uva 10600 ACM Contest and Blackout题目大意：给你一张图，求最小生成树和次小生成树。解题思路：次小生成树。#include <cstdio>#include <cstring>#include <algorithm>#include <cmath>#include <cstdlib>using namespace std;typedef long long
2015-09-08 21:12:58
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原创 uva 1359 poj 3522 Slim Span（最小生成树）
uva 1359 poj 3522 Slim SpanDescriptionGiven an undirected weighted graph G, you should find one of spanning trees specified as follows.The graph G is an ordered pair (V, E), wher
2015-09-07 21:21:18
523
原创 uva 1317 poj 2047 Concert Hall Scheduling（费用流）
uva 1317 ,poj 2047 Concert Hall SchedulingDescription You are appointed director of a famous concert hall, to save it from bankruptcy. The hall is very popular, and receives many requests to use its t
2015-09-06 11:23:21
666
原创 uva 10740 Not the Best （最短路 A*算法）
uva 10740 Not the Best题目大意：求第K短路。解题思路：A*算法。这题数据量比较小，也可以暴力。A*算法#include <cstdio>#include <cstring>#include <algorithm>#include <cmath>#include <cstdlib>#include <queue>using namespace std;typedef
2015-09-05 11:00:38
530
原创 uva 1516 Smoking gun（差分约束系统）
uva 1516 Smoking gunDescription Smoking gunAndy: ”Billy the Kid fired first!” Larry: ”No, I’m sure I heard the first shot coming from John!” The arguments went back and forth during the trial after th
2015-09-04 11:04:40
159
原创 uva 1515 Pool construction（最大流）
uva 1515 Pool construction题目大意：给一块n×m的地皮，上面有草地‘#’和洞‘.’ 。草地转换成洞需要d的费用，把洞填上种上草需要f的费用，在草地和洞之间加一道墙需要b的费用。现在问把这块n×m的地皮变成池子的最小费用是多少。（池子：边缘必须都是草地，每块草地与洞之间都有墙隔开）解题思路：建图方式非常巧妙。先把所有边界上的洞全部变成草地，并记录费用sum。设置超级源点，连向
2015-09-03 16:24:57
530
原创 uva 12092 Paint the Roads（费用流）
uva 12092 Paint the Roads（最大流）题目大意：某国有n个城市，用m条单向道路相连。你的任务是粉刷其中一些道路，使得被粉刷的道路组成一些没有公共边的回路，且每个城市恰好要在其中的k条回路上。被粉刷的所有道路的总长度要尽量小。求最小粉刷长度。解题思路：将每个城市拆成a, b两个点。设置超级源点，连向所有城市的a点，容量为k，费用为0。设置超级汇点，使所有城市的b点连向超级汇点，容
2015-09-03 14:48:22
470
原创 uva 11396 Claw Decomposition（二分图判定 BFS）
uva 11396 Claw Decomposition A claw is defined as a pointed curved nail on the end of each toe in birds, some reptiles, and some mammals. However, if you are a graph theory enthusiast, you may under
2015-09-01 20:20:45
449
原创 uva 10779 Collectors Problem（最大流）
uva 10779 Collectors ProblemSome candy manufacturers put stickers into candy bar packages. Bob and his friends are collecting these stickers. They all want as many different stickers as possible, but
2015-09-01 16:20:36
624
原创 uva 11613 Acme Corporation（费用流）
uva 11613 Acme Corporation题目大意：Acme公司生产一种X元素。给出该元素在未来M个月中每个月的生产成本，最大产量，单位售价，最大销售量，以及最大储存时间。你的任务是计算出公司能够赚到的最大利润。解题思路：把每个月，拆成a, b两点。设置一个超级源点，连向所有月份的a，容量为该月份最大产量，费用为该月单位生产成本。设置一个超级汇点，使所有的月份的b连向它，容量为该月的最大销
2015-09-01 13:55:00
753
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