It’s been a long time since my last blog post. Here is my recent one on Medium: ProvenLogs is a simple yet performant logging service built…
I just wrote my first Atom extension called file-header. It allows you to customize, add, update and cooperate your authoring information in header…
I came across a problem on leetcode a few days ago. It asked me to implement a simple regex (regular expression) matcher which supports both . and *…
Last week, during the prac 2 of CS IB, we were asked to program in Java to build a simple client/server system in which the server takes “commands” from the client and executes them. Due to the time restriction, we were only asked to implement the server, and use telnet to act as client to Continue reading...
Zend Debugger 5.2.5 and Zend Studio 5.5 are both newest products from Zend, the PHP company. Zend Debugger is a full-featured server side php debugger engine, an interactive tool that helps you debug PHP scripts. Zend Studio is a fantastic IDE for PHP programming(I am really happy with its code assistant). If they work together, Continue reading...
根本原因： 访问数据库的用户有登录权限，但无操作表的权限 解决办法： 1. 在[企业控制台]窗口–[树]子窗口–[安全性]子树–[登录]项里将你使用的登陆用户的默认数据库设为你所使用的数据库。 2. 在[企业控制台]窗口–[树]子窗口–[安全性]子树–[登录]项里新增一个登录用户（在其中选择SQL Server 身份验证、服务器角色和要访问的数据库），以后便可用些新增用户访问你勾选的数据库了。 大家在用java连接ms sql时可能会这样的问题 原因是sa用户为系统用户,它虽然能够登陆数据库，但是数据库里边的权限都是dbo的，所以，我们现在为这个数据库重新建立一个用户. 当然,这个情况只发生在java里边. .net是不会这样的. 只要新建立一个用户,再在权限那分配权限做好就行了.
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public Connection getConnectionDB() { String driverName = "com.microsoft.jdbc.sqlserver.SQLServerDriver"; String ConnectionString = "jdbc:microsoft:sqlserver://localhost:1433; DatabaseName=test;"; String userName = "username"; String userPwd = "password"; try { Class.forName(driverName); con = DriverManager.getConnection(ConnectionString, userName, userPwd); //System.out.println("Connection Successful!"); } catch (Exception e) { e.printStackTrace(); } return con; } ConnectionDB prod = new ConnectionDB(); Connection con = prod.getConnectionDB(); CallableStatement callStmt = null; java.sql.Statement stat = null; java.sql.ResultSet rs = null; stat = con.createStatement(); String sql = "select * from table"; rs = stat.executeQuery(sql); |
今天老师教我们如何使用Visual Studio中集成的Crystal Reports(水晶报表)来制做显示在WinForm中的报表。哈哈，Crystal Reports的强大功能真令人兴奋。简单的几个步骤就能作出非常漂亮的报表来。以下便是我第一次用Crystal Reports做的报表啦： Continue reading...
From Wikipedia, the free encyclopedia Object-Relational mapping (aka O/RM, ORM, and O/R mapping), is a programming technique that links databases to object-oriented language concepts, creating (in effect) a "virtual object database." There are both free and commercial packages available that perform object-relational mapping, although some programmers opt to code their own object-relational mapping for their Continue reading...
Pic from Wikipedia.org Continue reading...
刚学完C#中的几个流(Stream)，感觉良好，很容易上手。趁热打铁，做了个文件分割与合并的东东。原理很简单，但是感觉做好还是有难度。我分别用了BinaryWriter与BinaryReader读取、写入对应的基础流FileStream，并且用了正则表达式判断输入的有效性（呵呵，第一次用哦，多亏了THIN上课时一再给我们展示正则表达式的强大与便利）。 软件名称：文件分割与合并 English Name: FileSplitter 简介：将大文件分割成指定大小的小文件以方便网络传输，然后再将小文件合并成大文件。可以将不同大文件分割成的小文件统一放在一个文件夹里，传输后，可以从该文件夹里自动提取并还原成对应的大文件。 大小：44K 版本：1.0.0.0 下载： Continue reading...
其实我是不太喜欢微软的东西的，简单的说就是喜欢Java不喜欢.Net。但是学了C#之后，对微软的东西还是得说一个字”牛“。Visual Studio 2005给人得感觉很不错，但是总觉得是仿照eclipse做的，呵呵，傲慢与偏见。上面的游戏就是用vs 2k5做的，界面是用fireworks画的。还不错吧！ Continue reading...
其实在C#中要实现这个很简单，只要运用DateTime.Now记下程序开始和结束的时间再相减就行了。语法如下： [code lang=”csharp”] DateTime startTime=DateTime.Now; …… DateTime endTime=DateTime.Now; Console.WriteLine("程序运行的时间是：{0}",(endTime-startTime)); [/code] 例如我们可以用这个方法测试采用装箱和不装箱两种情况哪个效率更高 运行结果: Continue reading...
最近学编程,填一下心里的空虚,看到了这个代码,哈哈很有意思,大家都来玩玩啊~~~~ 打开任意一个网页(要有内容的,图片越多越好),再将下面代码贴到浏览器地址栏(覆盖掉以前的)，回车看看发生了什么 [code lang=”js”]javascript:R=0; x1=.1; y1=.05; x2=.25; y2=.24; x3=1.6; y3=.24; x4=300; y4=200; x5=300; y5=200; DI=document.images; DIL=DI.length; function A(){for(i=0; i-DIL; i++){DIS=DI[ i ].style; DIS.position=’absolute’; DIS.left=Math.sin(R*x1+i*x2+x3)*x4+x5; DIS.top=Math.cos(R*y1+i*y2+y3)*y4+y5}R++}setInterval(‘A()’,5); void(0);[/code] Continue reading...