介绍一款开源的正则表达式测试工具-Regex Tester
I know, I know, there are soooo many regular expression tester tools available on the 'Net, but I couldn't help creating my own. It's very simple, yet it supports all the basic features you'd espect from a tool of its kind, including code generation (VB and C#) and compilation to stand-alone assemblies. Best of all, it comes with source code. You can download it from the home page of my Visual Basic 2005 book (together with all other code samples in the book) or directly from here:
Executable (requires .NET Framework 2.0): RegexTester.zip (75.57 KB)
Source code (VB2005): RegexTester source.zip (88.15 KB)
Using the tool is quite simple. The main window is divided in three panes: (a) the pane where you enter the regex, (b) the pane where you load the text the regex must be applied to, (c) the result pane. A fourth pane appears when you select the Replace item from the Commands menu, and it's where you enter the replace pattern. As you can see in the image below, you can enter most regex patterns by selecting them from the context menu:
You select the kind of command (Find, replace, Split) from the Commands menu and you select one or more regex options from the Options menu:
After selecting the proper options, you press the F5 key (the Run item in the Commands menu) to execute the regex. Results are displayed in the bottom pane in a variety of formats and sort orders, which you can select from the Results menu, and the status bar displays the number of matches, the execution time, and the properties of the result currently highlighted in the result pane:
Alternatively, you can set all these options from the Properties dialog box (the Properties command in the File menu, or just press the F4 key):
Assigning a name to the current regex is important because you can save it on disk in a file with .regex extension, for later retrieval.
The Commands menu contains a couple of other interesting items. First, you can generate the C# or VB code for the current regular expression and copy it to the Clipboard:
Second, and more interesting, you can compile one or more regular expressions (including saved .regex projects) into a compiled assembly, which you can later reference from any .NET application. Using such compiled regexes is obviously faster than defining them in code, because you skip the parsing step:
That's it. You can use the YART tool for your own use, study its source code, modify and expands it as you like. If you find any major problems or add some noteworthy feature, just let me know.
如果你不觉得正则表达式很难读写的话，要么你是一个天才，要么，你不是地球人。正则表达式的语法很令人头疼，即使对经常使用它的人来说也是如此。由于难于读写，容易出错，所以找一种工具对正则表达式进行测试是很有必要的。
由于在不同的环境下正则表达式的一些细节是不相同的，本教程介绍的是微软 .Net Framework 2.0下正则表达式的行为，所以，我向你介绍一个.Net下的工具Regex Tester。首先你确保已经安装了.Net Framework 2.0，然后下载Regex Tester。这是个绿色软件，下载完后打开压缩包,直接运行RegexTester.exe就可以了。
下面是Regex Tester运行时的截图
再介绍几个平时收藏的关于正则表达式的网站，通俗易懂的：
正则表达式30分钟入门教程
(在介绍中国固定电话号码的时候有点没有说清楚，国内有3位区号+7位号码的和2位区号+8位号码的)
正确的写法应该是：^\(0\d{2}\)\d{8}$|^0\d{2}-\d{8}$|^\(0\d{3}\)\d{7}$|^0\d{3}-\d{7}$
这样就不会出现"(021-6666888"或者"(0816-6668888"的出现了。
