public class TestString { static String [] test = { "clean subject 0", "Re: clean subject 1", "Fw: clean subject 2", "RE: clean subject 3", "Re: FW: clean subject 4", "Fw: RE: FW: clean subject 5", "RE: Re: Re: Re: clean subject 6", "Fw: Re: clean subject 7", "Re: Re: Re: Re: Re: Re: Re: clean subject 8", "fw: re: fw: re: fw: re: fw: re: fw: re: fw: re: clean subject 9", "Fw: Re: clean subject 10", "*Confidential: Re: Fw: *XXX Confidential: Fw: clean subject 11", "*XXX Confidential: Fw: clean subject 12", "*XXX Confidential: Fw: Fw: clean subject 13", "Re: Replication clean subject", "Re: World Cup 2014 clean subject", "Fw: e-bug clean subject", }; /** * clean subject based on the subject */ public static String cleanSubject (String subject) { String cleanSubject = null; if (subject == null) { return cleanSubject; } // regex to Clean the mail subject String regex = "(Re: |RE: |re: |Fw: |FW: |fw: |\\*XXX Confidential: |\\*Confidential: )*"; String cs = subject.replaceFirst(regex, "").trim(); return cs; } public static void main(String[] args) { for (String s: test) { System.out.println(cleanSubject(s)); } } }
运行结果如下:
引用
clean subject 0
clean subject 1
clean subject 2
clean subject 3
clean subject 4
clean subject 5
clean subject 6
clean subject 7
clean subject 8
clean subject 9
clean subject 10
clean subject 11
clean subject 12
clean subject 13
Replication clean subject
World Cup 2014 clean subject
e-bug clean subject
clean subject 1
clean subject 2
clean subject 3
clean subject 4
clean subject 5
clean subject 6
clean subject 7
clean subject 8
clean subject 9
clean subject 10
clean subject 11
clean subject 12
clean subject 13
Replication clean subject
World Cup 2014 clean subject
e-bug clean subject