Java 使用正则表达式在文件中查找短语

使用正则表达式搜索文件中的短语

So...

Task:

I have some phrase. the phrase contains 2 words. Phrase is devided into two words with next symbols:

[\s]*

How can i find the phrase using regular expression?

This code doesn't work on a file:

节目

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您或者需要将整个文件放入一个字符串中（将该字符串添加到for循环中的

StringBuilder

，然后在末尾对结果进行一次匹配），或者需要添加一个大小写，将最后一个单词存储在一行，将第一个单词存储在下一行中，并对其进行检查。最简单但可能不是最快的方法是：

String lastline = ""
// For loop begins
  String[] ll_parts = lastline.split("\\s")
  lastline = line;
  line = ll_parts[ll_parts.length-1] + line;
// Now do the match

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至少在一次阅读中，我不太清楚你想做什么，想要什么。请尝试重新表述您的问题。

Pattern.compile（“class[\\s]+Main”，Pattern.MULTILINE | Pattern.DOTANY）我尝试在文件中查找短语。

          Pattern pattern = Pattern.compile("class[\\s]+Main");

          BufferedReader input = new BufferedReader ( new FileReader( "Main.java" ) );

          int id = 0;

          for ( String line = input.readLine(); line != null; line = input.readLine() )
          {
             ++id;

             Matcher matcher = pattern.matcher( line );


             if ( matcher.find() )
             {
                System.out.println("number = " + id );

                System.out.println("start = " + matcher.start() );
                System.out.println("end   = " + matcher.end() );
                System.out.println( );
             }
          }

          input.close();

String lastline = ""
// For loop begins
  String[] ll_parts = lastline.split("\\s")
  lastline = line;
  line = ll_parts[ll_parts.length-1] + line;
// Now do the match