Java中的正则表达式转义序列错误

Question

p = "<a href=\".*?\"\\stitle=\"(.*?\")>.*?<\/a><span class=\"event-nodetype\">\((.*?\)</span><span class=\"event-timeleft\">\()(.*?\)<\/span><li>)";

This is regex i created for

<a href="/bu/?q=node/775" title="YOK ED?LEN MEDEN?YET: GEÇ OSMANLI VE ERKEN CUMHUR?YET DÖNEMLER?NDE GAYR?MÜSL?M VARLI?I">YOK ED?LEN MEDEN?YET: GEÇ OSMANLI VE ERKEN CUMHUR?YET DÖNEMLER?NDE GAYR?MÜSL?M VARLI?I</a><span class="event-nodetype">(Konferans / Kongre / Sempozyum)</span><span class="event-timeleft">(Devam etmekte)</span><li> 

But eclipse gives error of

Invalid escape sequence (valid ones are \b \t \n \f \r \" \' \\ )

I put \\ to " and other things but still i cant fix it.

What is the problem?

When i split the line into 4 lines

 p = "<a href=\".*?\"\\stitle=\"(.*?\")>"
        + ".*?<\/a><span class=\"event-nodetype\">\(("
        + ".*?\)</span><span class=\"event-timeleft\">\()("
        + ".*?\)<\/span><li>)";

the error seems on line 2.

Answer 1

\\"是正确的， \\\\s也是如此（但是我会使用\\\\s+ 。）您的正则表达式中的所有其他反斜杠都必须转义： \\\\/ ， \\\\( ， \\\\) （ /不需要这是针对字符串文字的，而不是针对正则表达式的；反斜杠是两者的转义字符。