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ÒªÇó£º
1£¬°Ñ×Ö·û´®µÄa Ìæ»»³É A
2£¬×Ö·û´®ÖеÄaa ±£³Ö²»±ä
3£¬¶ÔÓÚaaa£¬Á¬ÔÚÒ»ÆðµÄ»°£¬·ÖΪÁ½ÖÖÇé¿ö£º
3.1£¬Èç¹ûÔÚ¿ªÍ·£º¾Í±ä³ÉAaa
3.2£¬Èç¹ûÔÚ½áβ£º¾Í±ä³ÉaaA
Eample:
×Ö·û´®£º aaabcdaeaakaaa
Òª±ä³É: AaabcdAeaakaaA
ÇëÎÊ£¬ÕâÑùµÄ×Ö·û´®Ó¦¸ÃÔõÑùÐ´ÄØ£¿
Ê×ÏÈ£¬Æ¥Åä a{1},È«²¿Ìæ»»³ÉA
È»ºó£¬Æ¥Åä ^a{3,}.$,½«µÚÒ»¸ö×Ö·ûÌæ»»³ÉA
Æ¥Åä ^.a{3,)$,½«×îºóÒ»¸ö×Ö·ûÌæ»»³ÉA¡£
ÄãÕâ¸öÊ×ÏÈ£¬¾Í°ÑËùÓеÄaÈ«²¿Ìæ»»³ÉÁËA£¬ÒÔºóÔÙÒ²ÕÒ²»µ½aÁË
Java code:
String s = "aaaasfsfasdfsaasfdsdfaaaafsfsaaa";
s = s.replaceAll("([^a]+)a([^a]+)", "$1A$2");
s = s.replaceAll("^aaa", "Aaa");
s = s.replaceAll("aaa$", "aaA");
System.out.println(s);
Êä³ö½á¹û£º
AaaasfsfAsdfsaasfdsdfaaaafsfsaaA
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ÎÒÏëʹÓÃLuceneµÄ´úÂ룬·¢ÏÖÒªimportÒ»ÅúÎļþ£º
============
import org.apache.lucene.analysis.standard.StandardAnalyzer;
import org.apache.lucene.document.Document;
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