java 正则表达式案例

如下演示
代码用scala书写,但是正则调用的是java的正则代码

import java.util.regex.{Matcher, Pattern}object delete extends App {//Compiles the given regular expression into a pattern.val pattern: Pattern = Pattern.compile("(13[0-9]|14[01456879]|15[0-3,5-9]|16[2567]|17[0-8]|18[0-9]|19[0-3,5-9])\\d{8}")//Creates a matcher that will match the given input against this pattern.private val matcher: Matcher = pattern.matcher("11/Dec/2020:21:16:02 +0800#CS#POST /B2C40/dist/main/images/common.png HTTP/1.1#CS#POST#CS#application/x-www-form-urlencoded; charset=UTF-8#CS#json=%7B%22depcity%22%3A%22CAN%22%2C+%22arrcity%22%3A%22WUH%22%2C+%22flightdate%22%3A%2220180220%22%2C+%22adultnum%22%3A%221%22%2C+%22childnum%22%3A%220%22%2C+%22infantnum%22%3A%220%22%2C+%22cabinorder%22%3A%220%22%2C+%22airline%22%3A%221%22%2C+%22flytype%22%3A%220%22%2C+%22international%22%3A%220%22%2C+%22action%22%3A%220%22%2C+%22segtype%22%3A%221%22%2C+%22cache%22%3A%220%22%2C+%22preUrl%22%3A%22%22%2C+%22isMember%22%3A%22%22%7D#CS#http://b2c.csair.com/B2C40/modules/bookingnew/main/flightSelectDirect.html?t=S&c1=CAN&c2=WUH&d1=2018-02-20&at=1&ct=0&it=0#CS#192.168.10.1#CS#Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.132 Safari/537.36#CS#2020-12-11T21:16:02+08:00#CS#192.168.10.99#CS#JSESSIONID=782121159357898886-112554CF44321E; sid=b5cc11e02e154ac5b0f3609332f86803; aid=8ae8768760927e280160bb348bef3e12; identifyStatus=N; userType4logCookie=M; userId4logCookie=13818791413; useridCookie=13818791413; userCodeCookie=13818791413; temp_zh=cou%3D0%3Bsegt%3D%E5%8D%95%E7%A8%8B%3Btime%3D2018-01-13%3B%E5%B9%BF%E5%B7%9E-%E5%8C%97%E4%BA%AC%3B1%2C0%2C0%3B%26cou%3D1%3Bsegt%3D%E5%8D%95%E7%A8%8B%3Btime%3D2018-01-17%3B%E5%B9%BF%E5%B7%9E-%E6%88%90%E9%83%BD%3B1%2C0%2C0%3B%26; JSESSIONID=782121159357B98CA6112554CF44321E; WT-FPC=id=211.103.142.26-608782688.30635197:lv=1516170718655:ss=1516170709449:fs=1513243317440:pn=2:vn=10; language=zh_CN; WT.al_flight=WT.al_hctype(S)%3AWT.al_adultnum(1)%3AWT.al_childnum(0)%3AWT.al_infantnum(0)%3AWT.al_orgcity1(CAN)%3AWT.al_dstcity1(CTU)%3AWT.al_orgdate1(2018-01-17)")//尝试查找与模式匹配的输入序列的下一个子序列。//此方法从该匹配器区域的开始处开始，或者，如果该方法的上一次调用成功并且自此之后未重置匹配器，则从与上一个匹配项不匹配的第一个字符开始。//如果匹配成功，则可以通过开始，结束和分组方法获取更多信息。while (matcher.find()) {//返回与前一个匹配项匹配的输入子序列。//对于具有输入序列s的匹配器m，表达式m.group（）和s.substring（m.start（），m.end（））是等效的。//请注意，某些模式（例如a *）与空字符串匹配。 当模式成功匹配输入中的空字符串时，此方法将返回空字符串。println(matcher.group())}
}

结果

15935789888
13818791413
13818791413
13818791413
15161707186
15161707094
15132433174

获取匹配字符串的索引位置

import java.util.regex.{Matcher, Pattern}object delete extends App {//Compiles the given regular expression into a pattern.val pattern: Pattern = Pattern.compile("(13[0-9]|14[01456879]|15[0-3,5-9]|16[2567]|17[0-8]|18[0-9]|19[0-3,5-9])\\d{8}")val s="11/Dec/2020:21:16:02 +0800#CS#POST /B2C40/dist/main/images/common.png HTTP/1.1#CS#POST#CS#application/x-www-form-urlencoded; charset=UTF-8#CS#json=%7B%22depcity%22%3A%22CAN%22%2C+%22arrcity%22%3A%22WUH%22%2C+%22flightdate%22%3A%2220180220%22%2C+%22adultnum%22%3A%221%22%2C+%22childnum%22%3A%220%22%2C+%22infantnum%22%3A%220%22%2C+%22cabinorder%22%3A%220%22%2C+%22airline%22%3A%221%22%2C+%22flytype%22%3A%220%22%2C+%22international%22%3A%220%22%2C+%22action%22%3A%220%22%2C+%22segtype%22%3A%221%22%2C+%22cache%22%3A%220%22%2C+%22preUrl%22%3A%22%22%2C+%22isMember%22%3A%22%22%7D#CS#http://b2c.csair.com/B2C40/modules/bookingnew/main/flightSelectDirect.html?t=S&c1=CAN&c2=WUH&d1=2018-02-20&at=1&ct=0&it=0#CS#192.168.10.1#CS#Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.132 Safari/537.36#CS#2020-12-11T21:16:02+08:00#CS#192.168.10.99#CS#JSESSIONID=782121159357898886-112554CF44321E; sid=b5cc11e02e154ac5b0f3609332f86803; aid=8ae8768760927e280160bb348bef3e12; identifyStatus=N; userType4logCookie=M; userId4logCookie=13818791413; useridCookie=13818791413; userCodeCookie=13818791413; temp_zh=cou%3D0%3Bsegt%3D%E5%8D%95%E7%A8%8B%3Btime%3D2018-01-13%3B%E5%B9%BF%E5%B7%9E-%E5%8C%97%E4%BA%AC%3B1%2C0%2C0%3B%26cou%3D1%3Bsegt%3D%E5%8D%95%E7%A8%8B%3Btime%3D2018-01-17%3B%E5%B9%BF%E5%B7%9E-%E6%88%90%E9%83%BD%3B1%2C0%2C0%3B%26; JSESSIONID=782121159357B98CA6112554CF44321E; WT-FPC=id=211.103.142.26-608782688.30635197:lv=1516170718655:ss=1516170709449:fs=1513243317440:pn=2:vn=10; language=zh_CN; WT.al_flight=WT.al_hctype(S)%3AWT.al_adultnum(1)%3AWT.al_childnum(0)%3AWT.al_infantnum(0)%3AWT.al_orgcity1(CAN)%3AWT.al_dstcity1(CTU)%3AWT.al_orgdate1(2018-01-17)"//Creates a matcher that will match the given input against this pattern.private val matcher: Matcher = pattern.matcher(s)while (matcher.find()) {println(matcher.group())//Returns the start index of the previous match.//获取匹配内容在整个字符串的位置val start: Int = matcher.start()//Returns the offset after the last character matched.//获取匹配内容结束位置val end: Int = matcher.`end`()//Returns a string that is a substring of this string. The substring begins at the specified beginIndex and extends to the character at index endIndex - 1println(s.substring(start,end))}
}

总结

构建正则对象pattern
获取匹配内容 group方法

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java 正则表达式案例

获取匹配字符串的索引位置

总结

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