正则表达式中的AND

Question

I want to write a RE in which I want to find all the select statement in the init method

I have written it as follows but It is not working

Answer 1

You could start off from something like so: public void init\\(\\).*?\\{.*?select\\s*\\*\\s*from (with the s flag, so that the . can match new line characters) example here .

The issue with your approach is that:

• Round brackets have a special meaning in regular expressions, so they need to be escaped with an extra \\ .
• By default, the period character ( . ) does not match a new line, so we need to add the s flag. In C#, this is available as RegexOptions.SingleLine .

PS If you want to make it more robust, you can use something like so: public\\s+void\\s+init\\s*\\(\\).*?\\{.*?select\\s*\\*\\s*from . This would allow you some more freedom when it comes to having multiple spaces between keywords.