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javaÕýÔò±í´ïʽͨ¹ýjava.util.regex°üϵÄPatternÀàÓëMatcherÀàʵÏÖ(½¨ÒéÔÚÔĶÁ±¾ÎÄʱ,´ò¿ªjava APIÎĵµ,µ±½éÉܵ½Äĸö·½·¨Ê±,²é¿´java APIÖеķ½·¨ËµÃ÷,Ч¹û»á¸ü¼Ñ).
PatternÀàÓÃÓÚ´´½¨Ò»¸öÕýÔò±í´ïʽ,Ò²¿ÉÒÔ˵´´½¨Ò»¸öÆ¥Åäģʽ,ËüµÄ¹¹Ôì·½·¨ÊÇ˽ÓеÄ,²»¿ÉÒÔÖ±½Ó´´½¨,µ«¿ÉÒÔͨ¹ýPattern.complie(String regex)¼òµ¥¹¤³§·½·¨´´½¨Ò»¸öÕýÔò±í´ïʽ,
Java´úÂëʾÀý:
Pattern p=Pattern.compile("\\w+");
p.pattern();//·µ»Ø \w+
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pattern() ·µ»ØÕýÔò±í´ïʽµÄ×Ö·û´®ÐÎʽ,Æäʵ¾ÍÊÇ·µ»ØPattern.complile(String regex)µÄregex²ÎÊý
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1.Pattern.split(CharSequence input)
PatternÓÐÒ»¸ösplit(CharSequence input)·½·¨,ÓÃÓÚ·Ö¸ô×Ö·û´®,²¢·µ»ØÒ»¸öString[],ÎÒ²ÂString.split(String regex)¾ÍÊÇͨ¹ýPattern.split(CharSequence input)À´ÊµÏÖµÄ.
Java´úÂëʾÀý:
Pattern p=Pattern.compile("\\d+");
String[] str=p.split("ÎÒµÄQQÊÇ:456456Îҵĵ绰ÊÇ:0532214ÎÒµÄÓÊÏäÊÇ:aaa@aaa.com");
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½á¹û:str[0]="ÎÒµÄQQÊÇ:" str[1]="Îҵĵ绰ÊÇ:" str[2]="ÎÒµÄÓÊÏäÊÇ:aaa@aaa.com"
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2.Pattern.matcher(String regex,CharSequence input)ÊÇÒ»¸ö¾²Ì¬·½·¨,ÓÃÓÚ¿ìËÙÆ¥Åä×Ö·û´®,¸Ã·½·¨ÊʺÏÓÃÓÚֻƥÅäÒ»´Î,ÇÒÆ¥ÅäÈ«²¿×Ö·û´®.
Java´úÂëʾÀý:
Pattern.matches("\\d+","2223");//·µ»Øtrue
Pattern.matches("\\d+","2223aa");//·µ»Øfalse,ÐèҪƥÅäµ½ËùÓÐ×Ö·û´®²ÅÄÜ·µ»Øtrue,ÕâÀïaa²»ÄÜÆ¥Åäµ½
Pattern.matches("\\d+","22bb23");//·µ»Øfalse,ÐèҪƥÅäµ½ËùÓÐ×Ö·û´®²ÅÄÜ·µ»Øtrue,ÕâÀïbb²»ÄÜÆ¥Åäµ½
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3.Pattern.matcher(CharSequence input)
˵ÁËÕâô¶à,ÖÕÓÚÂÖµ½MatcherÀàµÇ³¡ÁË,Pattern.matcher(CharSequence input)·µ»ØÒ»¸öMatcher¶ÔÏó.
MatcherÀàµÄ¹¹Ôì·½·¨Ò²ÊÇ˽ÓеÄ,²»ÄÜËæÒâ´´½¨,Ö»ÄÜͨ¹ýPattern.matcher(CharSequence input)·½·¨µÃµ½¸ÃÀàµÄʵÀý.
PatternÀàÖ»ÄÜ×öһЩ¼òµ¥µÄÆ¥Åä²Ù×÷,ÒªÏëµÃµ½¸üÇ¿¸ü±ã½ÝµÄÕýÔòÆ¥Åä²Ù×÷,ÄǾÍÐèÒª½«PatternÓëMatcherÒ»ÆðºÏ×÷.MatcherÀàÌṩÁ˶ÔÕýÔò±í´ïʽµÄ·Ö×éÖ§³Ö,ÒÔ¼°¶ÔÕýÔò±í´ïʽµÄ¶à´ÎÆ¥ÅäÖ§³Ö.
Java´úÂëʾÀý:
Pattern p=Pattern.compile("\\d+");
Matcher m=p.matcher("22bb23");
m.pattern();//·µ»Øp Ò²¾ÍÊÇ·µ»Ø¸ÃMatcher¶ÔÏóÊÇÓÉÄĸöPattern¶ÔÏóµÄ´´½¨µÄ
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4.Matcher.matches() / Matcher.lookingAt() / Matcher.find()
MatcherÀàÌṩÈý¸öÆ¥Åä²Ù×÷·½·¨,Èý¸


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