Java \u6b63\u5219\u8868\u8fbe\u5f0f<\/h1>\n<\/p><\/div>\n

\n Java\u6b63\u5219\u8868\u8fbe\u5f0f<\/strong>\u6216\u6b63\u5219\u8868\u8fbe\u5f0f\u662f\u4e00\u79cdAPI\uff0c\u7528\u4e8e\u641c\u7d22\u6216\u64cd\u4f5c\u5b57\u7b26\u4e32\u7684\u6a21\u5f0f\u3002\n <\/div>\n
\n \u5b83\u5e7f\u6cdb\u7528\u4e8e\u5b9a\u4e49\u5bf9\u5b57\u7b26\u4e32\u7684\u7ea6\u675f\uff0c\u4f8b\u5982\u5bc6\u7801\u548c\u7535\u5b50\u90ae\u4ef6\u9a8c\u8bc1\u3002\u5b66\u4e60\u5b8cJava regex\u6559\u7a0b\u4e4b\u540e\uff0c\u60a8\u5c06\u53ef\u4ee5\u4f7f\u7528Java Regex Tester\u5de5\u5177\u6d4b\u8bd5\u60a8\u7684\u6b63\u5219\u8868\u8fbe\u5f0f\u3002\n <\/div>\n
\n Java Regex API\u5728
\n java.util.regex <\/strong>\u4e2d\u63d0\u4f9b\u4e861\u4e2a\u63a5\u53e3\u548c3\u4e2a\u5305\u3002\n <\/div>\n
java.util.regex\u5305<\/h4>\n
\n Matcher\u548cPattern\u7c7b\u63d0\u4f9bJava\u6b63\u5219\u8868\u8fbe\u5f0f\u7684\u529f\u80fd\u3002 java.util.regex\u5305\u4e3a\u6b63\u5219\u8868\u8fbe\u5f0f\u63d0\u4f9b\u4e86\u4ee5\u4e0b\u7c7b\u548c\u63a5\u53e3\u3002\n <\/div>\n
MatchResult\u63a5\u53e3<\/span>
\n Matcher\u7c7b<\/span>
\n Pattern\u7c7b<\/span>
\n PatternSyntaxException\u7c7b<\/span>
\n $Java \u6b63\u5219\u8868\u8fbe\u5f0f_https:\/\/bianchenghao6.com_\u3010Java \u57fa\u7840\u6559\u7a0b\u3011_\u7b2c1\u5f20$ <\/p>\n
Matcher\u7c7b<\/h2>\n
\n \u5b83\u5b9e\u73b0
\n MatchResult <\/strong>\u63a5\u53e3\u3002\u8fd9\u662f\u4e00\u4e2a
\n
\n regex\u5f15\u64ce\uff0c\u7528\u4e8e\u5bf9\u5b57\u7b26\u5e8f\u5217\u6267\u884c\u5339\u914d\u64cd\u4f5c\u3002
\n <\/reg>\n <\/div>\n\n\n\n\n\n\n\n\n\n\n
\u65b9\u6cd5<\/td>\n \u8bf4\u660e<\/td>\n<\/tr>\n
boolean matchs()<\/td>\n \u6d4b\u8bd5\u6b63\u5219\u8868\u8fbe\u5f0f\u662f\u5426\u4e0e\u6a21\u5f0f\u5339\u914d\u3002<\/td>\n<\/tr>\n
boolean find()<\/td>\n \u67e5\u627e\u4e0e\u6a21\u5f0f\u5339\u914d\u7684\u4e0b\u4e00\u4e2a\u8868\u8fbe\u5f0f\u3002<\/td>\n<\/tr>\n
boolean find(int start)<\/td>\n \u4ece\u7ed9\u5b9a\u7684\u8d77\u59cb\u7f16\u53f7\u4e2d\u67e5\u627e\u4e0e\u6a21\u5f0f\u5339\u914d\u7684\u4e0b\u4e00\u4e2a\u8868\u8fbe\u5f0f\u3002<\/td>\n<\/tr>\n
String group()<\/td>\n \u8fd4\u56de\u5339\u914d\u7684\u5b50\u5e8f\u5217\u3002<\/td>\n<\/tr>\n
int start()<\/td>\n \u8fd4\u56de\u5339\u914d\u5b50\u5e8f\u5217\u7684\u8d77\u59cb\u7d22\u5f15\u3002<\/td>\n<\/tr>\n
int end()<\/td>\n \u8fd4\u56de\u5339\u914d\u5b50\u5e8f\u5217\u7684\u7ed3\u675f\u7d22\u5f15\u3002<\/td>\n<\/tr>\n
int groupCount()<\/td>\n \u8fd4\u56de\u5339\u914d\u7684\u5b50\u5e8f\u5217\u7684\u603b\u6570\u3002<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
\n
Pattern\u7c7b<\/h2>\n
\n \u5b83\u662f\u6b63\u5219\u8868\u8fbe\u5f0f\u7684
\n \u7f16\u8bd1\u7248\u672c<\/em>\u3002\u7528\u4e8e\u5b9a\u4e49\u6b63\u5219\u8868\u8fbe\u5f0f\u5f15\u64ce\u7684\u6a21\u5f0f\u3002\n <\/div>\n\n\n\n\n\n\n\n\n
\u65b9\u6cd5<\/td>\n \u8bf4\u660e<\/td>\n<\/tr>\n
static Pattern compile(String regex)<\/td>\n \u7f16\u8bd1\u7ed9\u5b9a\u7684\u6b63\u5219\u8868\u8fbe\u5f0f\u5e76\u8fd4\u56dePattern\u7684\u5b9e\u4f8b\u3002<\/td>\n<\/tr>\n
Matcher matcher(CharSequence input)<\/td>\n \u521b\u5efa\u4e00\u4e2a\u5339\u914d\u5668\uff0c\u5c06\u7ed9\u5b9a\u8f93\u5165\u4e0e\u6a21\u5f0f\u5339\u914d\u3002<\/td>\n<\/tr>\n
static boolean matches(String regex, CharSequence input)<\/td>\n \u5b83\u4f5c\u4e3a\u7f16\u8bd1\u548c\u5339\u914d\u65b9\u6cd5\u7684\u7ec4\u5408\u3002\u5b83\u4f1a\u7f16\u8bd1\u6b63\u5219\u8868\u8fbe\u5f0f\uff0c\u5e76\u5c06\u7ed9\u5b9a\u7684\u8f93\u5165\u4e0e\u6a21\u5f0f\u5339\u914d\u3002<\/td>\n<\/tr>\n
String[] split(CharSequence input)<\/td>\n \u5c06\u7ed9\u5b9a\u7684\u8f93\u5165\u5b57\u7b26\u4e32\u62c6\u5206\u4e3a\u7ed9\u5b9a\u6a21\u5f0f\u7684\u5339\u914d\u9879\u3002 <\/td>\n<\/tr>\n
String pattern()<\/td>\n \u8fd4\u56de\u6b63\u5219\u8868\u8fbe\u5f0f\u6a21\u5f0f\u3002<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
\n
Java\u6b63\u5219\u8868\u8fbe\u5f0f\u793a\u4f8b<\/h3>\n
\n \u6709\u4e09\u79cd\u65b9\u6cd5\u53ef\u4ee5\u7528Java\u7f16\u5199\u6b63\u5219\u8868\u8fbe\u5f0f\u793a\u4f8b\u3002\n <\/div>\n
\n
import java.util.regex.*; public <\/span>class <\/span>RegexExample1{ public <\/span>static void <\/span>main(String args[]){ Pattern p = Pattern.compile<\/span>(\".s\"<\/span><\/span><\/span>); Matcher m = p.matcher<\/span>(\"as\"<\/span><\/span><\/span>); boolean b = m.matches<\/span>(); boolean b2=Pattern.compile<\/span>(\".s\").matcher<\/span>(\"as\").matches<\/span>(); boolean b3 = Pattern.matches<\/span>(\".s\", \"as\"); System.out.println<\/span>(b+\" \"<\/span><\/span>+b2+\" \"+b3); } } <\/span><\/code><\/pre>\n<\/p><\/div>\n\u8f93\u51fa<\/h4>\n\n truetrue<\/span><\/span> true<\/span><\/span> <\/span><\/code><\/pre>\n<\/p><\/div>\n \n\u6b63\u5219\u8868\u8fbe\u5f0f.\u793a\u4f8b<\/h2>\n\n .(\u70b9)\u4ee3\u8868\u4e00\u4e2a\u5b57\u7b26\u3002\n <\/div>\n\n import java.util.regex.*; class <\/span>RegexExample2{ public <\/span>static void <\/span>main(String args[]){ System.out.println<\/span>(Pattern.matches<\/span>(\".s\"<\/span><\/span><\/span><\/span>, \"as\"<\/span>)); System.out.println<\/span>(Pattern.matches<\/span>(\".s\", \"mk\"<\/span>)); System.out.println<\/span>(Pattern.matches<\/span>(\".s\", \"mst\"<\/span>)); System.out.println<\/span>(Pattern.matches<\/span>(\".s\", \"amms\"<\/span>)); System.out.println<\/span>(Pattern.matches<\/span>(\"..s\"<\/span>, \"mas\"<\/span>)); } } <\/span><\/code><\/pre>\n<\/p><\/div>\n \n\u6b63\u5219\u8868\u8fbe\u5f0f\u5b57\u7b26\u7c7b<\/h2>\n\n\n\n\n\n\n\n\n\n\n\u89d2\u8272\u7c7b<\/td>\n \u8bf4\u660e<\/td>\n<\/tr>\n [abc] <\/td>\n a\uff0cb\u6216c(\u7b80\u5355\u7c7b)<\/td>\n<\/tr>\n [^ abc] <\/td>\n \u9664a\uff0cb\u6216c(\u53d6\u53cd)\u4e4b\u5916\u7684\u4efb\u4f55\u5b57\u7b26<\/td>\n<\/tr>\n [a-zA-Z] <\/td>\n a\u5230z\u6216A\u5230Z\uff0c\u5305\u62ec\u7aef\u70b9(\u8303\u56f4)<\/td>\n<\/tr>\n [a-d [m-p]] <\/td>\n a\u5230d\uff0c\u6216m\u5230p: [a-dm-p](\u8054\u5408)<\/td>\n<\/tr>\n [a-z && [def]] <\/td>\n d\uff0ce\u6216f(\u4ea4\u53c9\u70b9)<\/td>\n<\/tr>\n [a-z && [^ bc]] <\/td>\n a\u5230z\uff0cb\u548cc\u9664\u5916: [ad-z](\u51cf\u6cd5)<\/td>\n<\/tr>\n [a-z && [^ m-p]] <\/td>\n a\u5230z\uff0c\u800c\u4e0d\u662fm\u5230p: [a-lq-z](\u51cf\u6cd5)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n \n\u6b63\u5219\u8868\u8fbe\u5f0f\u5b57\u7b26\u7c7b\u793a\u4f8b<\/h2>\n\n import java.util.regex.*; class <\/span>RegexExample3{ public <\/span>static void <\/span>main(String args[]){ System.out.println<\/span>(Pattern.matches<\/span>(\"[amn]\"<\/span><\/span><\/span>, \"abcd\"<\/span>)); System.out.println<\/span>(Pattern.matches<\/span>(\"[amn]\", \"a\"<\/span>)); System.out.println<\/span>(Pattern.matches<\/span>(\"[amn]\", \"ammmna\"<\/span>)); } } <\/span><\/code><\/pre>\n<\/p><\/div>\n \n\u6b63\u5219\u8868\u8fbe\u5f0f\u91cf\u8bcd<\/h2>\n\n \u91cf\u8bcd\u6307\u5b9a\u5b57\u7b26\u51fa\u73b0\u7684\u6b21\u6570\u3002\n <\/div>\n\n\n\n\n\n\n\n\n\n\u6b63\u5219\u8868\u8fbe\u5f0f<\/td>\n \u8bf4\u660e<\/td>\n<\/tr>\n X\uff1f<\/td>\n X\u53d1\u751f\u4e00\u6b21\u6216\u6839\u672c\u4e0d\u53d1\u751f<\/td>\n<\/tr>\n X + <\/td>\n X\u53d1\u751f\u4e00\u6b21\u6216\u591a\u6b21<\/td>\n<\/tr>\n X * <\/td>\n X\u53d1\u751f\u96f6\u6b21\u6216\u591a\u6b21<\/td>\n<\/tr>\n X {n} <\/td>\n X\u4ec5\u51fa\u73b0n\u6b21<\/td>\n<\/tr>\n X {n\uff0c} <\/td>\n X\u51fa\u73b0n\u6b21\u6216\u66f4\u591a\u6b21<\/td>\n<\/tr>\n X {y\uff0cz} <\/td>\n X\u53d1\u751f\u81f3\u5c11y\u6b21\u4f46\u5c11\u4e8ez\u6b21<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n \n\u6b63\u5219\u8868\u8fbe\u5f0f\u5b57\u7b26\u7c7b\u548c\u91cf\u8bcd\u793a\u4f8b<\/h2>\n\n import java.util.regex.*; class <\/span>RegexExample4{ public <\/span>static void <\/span>main(String args[]){ System.out.println<\/span>(\"? quantifier ....\"<\/span>); System.out.println<\/span>(Pattern.matches<\/span>(\"[amn]?\"<\/span><\/span><\/span><\/span><\/span>, \"a\"<\/span><\/span>)); System.out.println<\/span>(Pattern.matches<\/span>(\"[amn]?\", \"aaa\"<\/span><\/span>)); System.out.println<\/span>(Pattern.matches<\/span>(\"[amn]?\", \"aammmnn\"<\/span><\/span>)); System.out.println<\/span>(Pattern.matches<\/span>(\"[amn]?\", \"aazzta\"<\/span><\/span>)); System.out.println<\/span>(Pattern.matches<\/span>(\"[amn]?\", \"am\"<\/span>)); System.out.println<\/span>(\"+ quantifier ....\"<\/span>); System.out.println<\/span>(Pattern.matches<\/span>(\"[amn]+\"<\/span><\/span><\/span><\/span>, \"a\")); System.out.println<\/span>(Pattern.matches<\/span>(\"[amn]+\", \"aaa\")); System.out.println<\/span>(Pattern.matches<\/span>(\"[amn]+\", \"aammmnn\")); System.out.println<\/span>(Pattern.matches<\/span>(\"[amn]+\", \"aazzta\")); System.out.println<\/span>(\"* quantifier ....\"<\/span>); System.out.println<\/span>(Pattern.matches<\/span>(\"[amn]*\"<\/span>, \"ammmna\"<\/span>)); \/\/true (a or m or n may come zero or more times)} } <\/span><\/code><\/pre>\n<\/p><\/div>\n \n\u6b63\u5219\u8868\u8fbe\u5f0f\u5143\u5b57\u7b26<\/h2>\n\n \u6b63\u5219\u8868\u8fbe\u5f0f\u5143\u5b57\u7b26\u7528\u4f5c\u7b80\u7801\u3002\n <\/div>\n\n\n\n\n\n\n\n\n\n\n\n\n\u6b63\u5219\u8868\u8fbe\u5f0f<\/td>\n \u8bf4\u660e<\/td>\n<\/tr>\n .<\/td>\n \u4efb\u4f55\u5b57\u7b26(\u53ef\u80fd\u5339\u914d\u7ec8\u6b62\u7b26\uff0c\u4e5f\u53ef\u80fd\u4e0d\u5339\u914d)<\/td>\n<\/tr>\n \\ d <\/td>\n \u4efb\u4f55\u6570\u5b57\uff0c\u5c11\u4e8e[0-9] <\/td>\n<\/tr>\n \\ D <\/td>\n \u4efb\u4f55\u975e\u6570\u5b57\uff0c\u662f[^ 0-9]\u7684\u7f29\u5199<\/td>\n<\/tr>\n \\ s <\/td>\n \u4efb\u4f55\u7a7a\u683c\u5b57\u7b26\uff0c\u662f[\\ t \\ n \\ x0B \\ f \\ r]\u7684\u7f29\u5199<\/td>\n<\/tr>\n \\ S <\/td>\n \u4efb\u4f55\u975e\u7a7a\u767d\u5b57\u7b26\uff0c\u662f[^ \\ s]\u7684\u7f29\u5199<\/td>\n<\/tr>\n \\ w <\/td>\n \u4efb\u4f55\u5355\u8bcd\u5b57\u7b26\uff0c\u662f[a-zA-Z_0-9]\u7684\u7f29\u5199<\/td>\n<\/tr>\n \\ W <\/td>\n \u4efb\u4f55\u975e\u5355\u8bcd\u5b57\u7b26\uff0c\u662f[^ \\ w]\u7684\u7f29\u5199<\/td>\n<\/tr>\n \\ b <\/td>\n \u5355\u8bcd\u8fb9\u754c<\/td>\n<\/tr>\n \\ B <\/td>\n \u975e\u5355\u8bcd\u8fb9\u754c<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n \n\u6b63\u5219\u8868\u8fbe\u5f0f\u5143\u5b57\u7b26\u793a\u4f8b<\/h2>\n\n import java.util.regex.*; class <\/span>RegexExample5{ public <\/span>static void <\/span>main(String args[]){ System.out.println<\/span>(\"metacharacters d....\"<\/span>); \\\\d means digitSystem.out.println<\/span>(Pattern.matches<\/span>(\"\\\\d\"<\/span><\/span><\/span><\/span>, \"abc\"<\/span><\/span>)); System.out.println<\/span>(Pattern.matches<\/span>(\"\\\\d\", \"1\"<\/span><\/span>)); System.out.println<\/span>(Pattern.matches<\/span>(\"\\\\d\", \"4443\"<\/span><\/span>)); System.out.println<\/span>(Pattern.matches<\/span>(\"\\\\d\", \"323abc\"<\/span><\/span>)); System.out.println<\/span>(\"metacharacters D....\"<\/span>); \\\\D means non-digitSystem.out.println<\/span>(Pattern.matches<\/span>(\"\\\\D\"<\/span><\/span><\/span><\/span><\/span>, \"abc\")); System.out.println<\/span>(Pattern.matches<\/span>(\"\\\\D\", \"1\")); System.out.println<\/span>(Pattern.matches<\/span>(\"\\\\D\", \"4443\")); System.out.println<\/span>(Pattern.matches<\/span>(\"\\\\D\", \"323abc\")); System.out.println<\/span>(Pattern.matches<\/span>(\"\\\\D\", \"m\"<\/span>)); System.out.println<\/span>(\"metacharacters D with quantifier....\"<\/span>); System.out.println<\/span>(Pattern.matches<\/span>(\"\\\\D*\"<\/span>, \"mak\"<\/span>)); } } <\/span><\/code><\/pre>\n<\/p><\/div>\n \n\u6b63\u5219\u8868\u8fbe\u5f0f\u95ee\u98981 <\/h2>\n\n import java.util.regex.*; class <\/span>RegexExample6{ public <\/span>static void <\/span>main(String args[]){ System.out.println<\/span>(Pattern.matches<\/span>(\"[a-zA-Z0-9]{6}\"<\/span><\/span><\/span><\/span>, \"arun32\"<\/span>)); System.out.println<\/span>(Pattern.matches<\/span>(\"[a-zA-Z0-9]{6}\", \"kkvarun32\"<\/span>)); System.out.println<\/span>(Pattern.matches<\/span>(\"[a-zA-Z0-9]{6}\", \"JA2Uk2\"<\/span>)); System.out.println<\/span>(Pattern.matches<\/span>(\"[a-zA-Z0-9]{6}\", \"arun$2\"<\/span>)); } } <\/span><\/code><\/pre>\n<\/p><\/div>\n \n\u6b63\u5219\u8868\u8fbe\u5f0f\u95ee\u98982 <\/h2>\n\n import java.util.regex.*; class <\/span>RegexExample7{ public <\/span>static void <\/span>main(String args[]){ System.out.println<\/span>(\"by character classes and quantifiers ...\"<\/span>); System.out.println<\/span>(Pattern.matches<\/span>(\"[789]{1}[0-9]{9}\"<\/span>, \"9953038949\"<\/span><\/span>)); System.out.println<\/span>(Pattern.matches<\/span>(\"[789][0-9]{9}\"<\/span><\/span><\/span><\/span>, \"9953038949\")); System.out.println<\/span>(Pattern.matches<\/span>(\"[789][0-9]{9}\", \"99530389490\"<\/span>)); System.out.println<\/span>(Pattern.matches<\/span>(\"[789][0-9]{9}\", \"6953038949\"<\/span>)); System.out.println<\/span>(Pattern.matches<\/span>(\"[789][0-9]{9}\", \"8853038949\"<\/span><\/span>)); System.out.println<\/span>(\"by metacharacters ...\"<\/span>); System.out.println<\/span>(Pattern.matches<\/span>(\"[789]{1}\\\\d{9}\"<\/span><\/span>, \"8853038949\")); System.out.println<\/span>(Pattern.matches<\/span>(\"[789]{1}\\\\d{9}\", \"3853038949\"<\/span>)); } } <\/span><\/code><\/pre>\n<\/p><\/div>\n Java Regex Finder\u793a\u4f8b<\/h2>\n\n import java.util.regex.Pattern; import java.util.Scanner; import java.util.regex.Matcher; public <\/span>class <\/span>RegexExample8{ public <\/span>static void <\/span>main(String[] args){ Scanner sc=new Scanner(System.in); while <\/span>(true) { System.out.println<\/span>(\"Enter regex pattern:\"<\/span>); Pattern pattern = Pattern.compile<\/span>(sc.nextLine<\/span>()); System.out.println<\/span>(\"Enter text:\"<\/span>); Matcher matcher = pattern.matcher<\/span>(sc.nextLine<\/span>()); boolean found = false<\/span>; while <\/span>(matcher.find<\/span>()) { System.out.println<\/span>(\"I found the text \"<\/span>+matcher.group<\/span>()+\" starting at index \"<\/span>+ matcher.start<\/span>()+\" and ending at index \"<\/span>+matcher.end<\/span>()); found = true<\/span><\/span>; } if(!found){ System.out.println<\/span>(\"No match found.\"<\/span>); } } } } <\/span><\/code><\/pre>\n<\/p><\/div>\n\n \u8f93\u51fa:\n <\/div>\n\nEnter regex pattern: java \n Enter text: this is java, do you know java \n I found the text java starting at index 8 and ending at index 12 \n I found the text java starting at index 26 and ending at index 30<\/code><\/pre>\n<\/p><\/div>\n <\/body> \n<\/html><\/p>\n","protected":false},"excerpt":{"rendered":"Java \u6b63\u5219\u8868\u8fbe\u5f0fzh-cn","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[111],"tags":[],"class_list":["post-731","post","type-post","status-publish","format-standard","hentry","category-java-jichu"],"_links":{"self":[{"href":"https:\/\/bianchenghao6.com\/wp-json\/wp\/v2\/posts\/731"}],"collection":[{"href":"https:\/\/bianchenghao6.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/bianchenghao6.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/bianchenghao6.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/bianchenghao6.com\/wp-json\/wp\/v2\/comments?post=731"}],"version-history":[{"count":0,"href":"https:\/\/bianchenghao6.com\/wp-json\/wp\/v2\/posts\/731\/revisions"}],"wp:attachment":[{"href":"https:\/\/bianchenghao6.com\/wp-json\/wp\/v2\/media?parent=731"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/bianchenghao6.com\/wp-json\/wp\/v2\/categories?post=731"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/bianchenghao6.com\/wp-json\/wp\/v2\/tags?post=731"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}