Shicheng_Yang-优快云博客

原创 Strust2+JavaBean+DAO开发示例

题目要求：（1）技术要求：采用struts2架构构建一个简单的登录系统。（2）系统功能要求：当用户在登录页面上填写用户名和密码并提交后，系统检查该用户是否已经注册，若注册，系统进入主页面，否则，进入注册页面。构建系统的处理步骤（1）分析系统，给出系统的业务流程（这是系统设计的关键一步，只有搞清业务处理，才能开发出正确的系统）（2）系统设计，根据对系统的分析，

2013-10-23 10:18:01 956

原创 DAO操作--以MySQL为例

1.1 MySQL数据库基础MySQL 是一个真正的多用户、多线程SQL数据库服务器，MySQL具有小巧、功能齐全、查询迅捷等优点，MySQL 对于一般中小型，甚至大型应用都能够胜任。1.2 数据类型和数据表用于保存数据记录的结构被称为数据表。而每一条数据记录则是由更小的数据对象，即数据类型组成。Database ＜ Table ＜ Record ＜ Datatype

2013-10-23 09:35:08 1669

原创 DDA算法

DDA算法（Digital Differential Analyzer），又称数值微分法，是计算机图形学中一种基于直线的微分方程来生成直线的方法。|k|void DDALine(int x0,int y0,int x1,int y1,int color){ int x; float dx,dy,y,k; dx=x1-x0,dy=y1-

2013-10-15 21:28:06 1823

原创 Struts2+JavaBean的开发练习

输入两个整数，计算这两个数的代数和，如果代数和为非负数，这跳转到positive.jsp，否则跳转到negative.jsp并显示计算结果。开发步骤：1.安装Struts2将所需要的jar包放入WEB-INF\lib下2.配置web.xml修改WEB-INF下的web.xml<web-app version="2.5" xmlns="http://java.sun

2013-10-11 00:16:25 1062

原创 MVC框架技术Struts2

1.Struts2概述1.1在Web程序的开发过程中，大家普遍认可了MVC模式的重要地位。但是MVC模式并没有给出代码结构性的具体要求。例如MVC的控制器部分是做一个Servlet，还是做多个Servlet,跳转页面的名称是写在代码中，还是写在配置文件中。对这些问题，MVC模式不能给出进一步的回答。虽然大家都使用MVC模式，但是写出来的代码还是不能做到完全的一致。这样就给MVC模式开发的规范化

2013-10-10 23:56:24 1057

原创设置默认信息的方法

(1)设置默认的主页： web.xml--->修改（2）设置默认端口--》80（8080--》80）直接修改conf/server.xml,找到： maxHttpHeaderSize=”8192″ 把其中的8080修改为80，（3）设置默认工程：直接修改：修改默认项目地址的方法：在

2013-10-10 23:37:17 979

原创 JSP+Servlet+JavaBean实现MVC模式练习

5种开发模式的总结1、利用单纯的JSP页面开发模式设计Web程序，计算1+2+3+….+100的和值，并在网页上显示结果。文件结构index.jsp <% int i; int sum=0; for(i=1;i<=100;i++) sum+=i; %> 这是一单纯的jsp页面编程示例

2013-10-10 23:34:48 3140 1

原创 codeforces 263C. Circle of Numbers

C. Circle of Numberstime limit per test2 secondsmemory limit per test256 megabytesinputstandard inputoutputstandard outputOne day Vasya came up to the blackboar

2013-09-24 11:57:04 1516

原创 hdu 1012 u Calculate e

u Calculate eTime Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 25225 Accepted Submission(s): 11190Problem DescriptionA simple m

2013-09-19 09:25:50 873

原创 hdu 4737 A Bit Fun 暴力

A Bit FunTime Limit: 5000/2500 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 76 Accepted Submission(s): 41Problem DescriptionThere are n numbers

2013-09-14 18:01:52 1539 6

原创 poj 2115 C Looooops 扩展欧几里德算法

C LooooopsTime Limit: 1000MS Memory Limit: 65536KTotal Submissions: 15305 Accepted: 3901DescriptionA Compiler Mystery: We are given a C-language style for loop of

2013-09-12 20:55:23 931

原创 poj 2185 Milking Grid KMP

Milking GridTime Limit: 3000MS Memory Limit: 65536KTotal Submissions: 5046 Accepted: 2113DescriptionEvery morning when they are milked, the Farmer John's cows for

2013-09-12 20:37:44 1968

原创 poj 1101 The Game BFS

The GameTime Limit: 1000MS Memory Limit: 10000KTotal Submissions: 8401 Accepted: 2564DescriptionOne morning, you wake up and think: "I am such a good programmer.

2013-09-12 20:27:11 1503

原创 poj 1102 LC-Display

LC-DisplayTime Limit: 1000MS Memory Limit: 10000KTotal Submissions: 14432 Accepted: 5763DescriptionA friend of you has just bought a new computer. Until now, the

2013-09-12 20:22:01 783

原创 poj 1105 S-Trees 数组模拟建树

S-TreesTime Limit: 1000MS Memory Limit: 10000KTotal Submissions: 1321 Accepted: 707DescriptionA Strange Tree (S-tree) over the variable set Xn = {x1,x2,...,xn} is

2013-09-11 10:34:56 1214

原创 hdu 2896 病毒侵袭 AC自动机

病毒侵袭Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 8250 Accepted Submission(s): 2158Problem Description当太阳的光辉逐渐被月亮遮蔽，世界失去了光明

2013-09-08 16:02:51 549

原创 hdu 4196 Remoteland 基本算术定理

RemotelandTime Limit: 10000/5000 MS (Java/Others) Memory Limit: 262144/131072 K (Java/Others)Total Submission(s): 846 Accepted Submission(s): 305Problem DescriptionIn the Republi

2013-08-31 16:41:32 918

原创 POJ 1204 Word Puzzles AC自动机

Word PuzzlesTime Limit: 5000MS Memory Limit: 65536KTotal Submissions: 8353 Accepted: 3160 Special JudgeDescriptionWord puzzles are usually simple and very ent

2013-08-28 10:08:23 906

原创 hdu 2179 pi 母函数

piTime Limit : 6000/2000ms (Java/Other) Memory Limit : 32768/32768K (Java/Other)Total Submission(s) : 1 Accepted Submission(s) : 1Problem Description计算圆周率到小数点后5n 位。（本题不可打表）

2013-08-23 11:00:40 1200 1

原创 hdu 1234 Rooted Trees Problem 有重复的组合+乘法原理

Rooted Trees ProblemTime Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 443 Accepted Submission(s): 147Problem DescriptionGive yo

2013-08-23 10:46:29 1023

原创 hdu 1799 循环多少次？组合数

循环多少次？Time Limit: 3000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 2298 Accepted Submission(s): 832Problem Description 我们知道，在编程中，我们时常需要考虑

2013-08-22 17:33:02 661

原创 poj 2406 Power Strings KMP应用

Power StringsTime Limit: 3000MS Memory Limit: 65536KTotal Submissions: 27694 Accepted: 11600DescriptionGiven two strings a and b we define a*b to be their concate

2013-08-22 16:22:25 857

原创 Ural 1167. Bicolored Horses DP

1167. Bicolored HorsesTime limit: 1.0 secondMemory limit: 64 MBEvery day, farmer Ion (this is a Romanian name) takes out all his horses, so they may run and play. When they are done, far

2013-08-21 15:36:25 1306

原创 Ural 1132. Square Root 二次剩余

1132. Square RootTime limit: 1.0 secondMemory limit: 64 MBThe number x is called a square root of a modulo n (root(a,n)) if x*x = a (mod n). Write the program to find the square root o

2013-08-19 17:43:12 1256

原创 Ural 1456. Jedi Riddle 2 整数的阶

1456. Jedi Riddle 2Time limit: 0.25 secondMemory limit: 64 MBBackgroundEveryone wants to be respected and famous. At that many of us forget that most people became respected and famous

2013-08-19 11:26:58 791

原创 Ural 1554. Multiplicative Functions 狄利克雷卷积

1554. Multiplicative FunctionsTime limit: 2.0 secondMemory limit: 64 MBIn number theory, a multiplicative function is an arithmetic function F(n) of the positive integer nwith property t

2013-08-19 09:46:19 1861

原创 hdu 3292 No more tricks, Mr Nanguo pell方程+矩阵快速幂

No more tricks, Mr NanguoTime Limit: 3000/1000 MS (Java/Others) Memory Limit: 65535/32768 K (Java/Others)Total Submission(s): 201 Accepted Submission(s): 113Problem DescriptionNo

2013-08-17 10:01:18 826

原创 poj 1006 生理周期中国剩余定理

生理周期Time Limit: 1000MS Memory Limit: 10000KTotal Submissions: 103623 Accepted: 32049Description人生来就有三个生理周期，分别为体力、感情和智力周期，它们的周期长度为23天、28天和33天。每一个周期中有一天是高峰。在高峰这天，人会

2013-08-17 09:41:57 1263

原创 poj 2689 Prime Distance 二次筛法

Prime DistanceTime Limit: 1000MS Memory Limit: 65536KTotal Submissions: 10269 Accepted: 2772DescriptionThe branch of mathematics called number theory is about pro

2013-08-17 09:30:30 726

原创 Ural 1268. Little Chu 求原根

1268. Little ChuTime limit: 0.25 secondMemory limit: 64 MBThe favorite occupation of Little Chu is to sleep. Strictly speaking, he is busy with nothing but sleeping. Sometimes he wakes u

2013-08-15 18:35:12 869

原创 Ural 1428. Jedi Riddle 二分求幂

1428. Jedi RiddleTime limit: 1.0 secondMemory limit: 64 MBBackgroundSystem administrator Vasily Slipman, also known as Jedi Master, was an outstanding jester. He enciphered gigabyte ar

2013-08-15 10:02:54 684

原创 Ural 1585. Penguins

1585. PenguinsTime limit: 1.0 secondMemory limit: 64 MBProgrammer Denis has been dreaming of visiting Antarctica since his childhood. However, there are no regular flights to Antarctica

2013-08-14 20:58:49 808

原创 Ural 1698. Square Country 5 记忆化搜索

1698. Square Country 5Time limit: 2.0 secondMemory limit: 64 MBThe first arithmetical operation taught to the children of the Square country is the calculation of squares of positive int

2013-08-14 20:26:18 909

原创 Ural 1593. Square Country. Version 2 Lagrange 定理

1593. Square Country. Version 2Time limit: 1.0 secondMemory limit: 64 MBThere live square people in a square country. Everything in this country is square also. Thus, the Square Parliame

2013-08-14 20:05:06 1174

原创 Ural 1097. Square Country 2

1097. Square Country 2Time limit: 1.0 secondMemory limit: 64 MBThe Square Parliament of the Square country (recall the corresponding problem from the USU 2001 personal contest) has decre

2013-08-14 18:30:23 1309

原创 Ural 1748. The Most Complex Number DFS+反素数

1748. The Most Complex NumberTime limit: 1.0 secondMemory limit: 64 MBLet us define a complexity of an integer as the number of its divisors. Your task is to find the most complex intege

2013-08-14 17:00:14 1039

原创 Ural 1486. Equal Squares 字符串hash

1486. Equal SquaresTime limit: 2.0 secondMemory limit: 16 MBDuring a discussion of problems at the Petrozavodsk Training Camp, Vova and Sasha argued about who of them could in 300 minute

2013-08-14 14:51:40 1671

原创 Ural 1446. Sorting Hat

1446. Sorting HatTime limit: 1.0 secondMemory limit: 64 MBAt the start of each school year, a very important event happens at Hogwarts. Each of the first-year wizards and witches is assi

2013-08-14 10:11:53 937

原创 Ural 1706. Cipher Message 2 后缀数组

1706. Cipher Message 2Time limit: 3.0 secondMemory limit: 64 MBMüller had been suspecting for a long time that Stierlitz had been sending cipher messages to the USSR from time to time. A

2013-08-14 09:54:52 863

原创 poj 3096 Surprising Strings 字符串哈希

Surprising StringsTime Limit: 1000MS Memory Limit: 65536KTotal Submissions: 5232 Accepted: 3438DescriptionThe D-pairs of a string of letters are the ordered pairs

2013-08-13 11:23:11 716

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