import java.util.regex.Matcher; import java.util.regex.Pattern; public class RegexMatches { public static void main( String args[] ){ // 按指定模式在字符串查找 String line = "This order was placed for QT3000! OK? "; String pattern = "(.*)(\\d+)(.*)&qu…
Easier Done Than Said? Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 9845 Accepted Submission(s): 4784 Problem Description Password security is a tricky thing. Users prefer simple password…
[010-Regular Expresssion Matching(正則表達式匹配)] [LeetCode-面试算法经典-Java实现][全部题目文件夹索引] 原题 Implement regular expression matching with support for '.' and '*'. '.' Matches any single character. '*' Matches zero or more of the preceding element.The matching sh…
一.简单介绍 1.什么是正則表達式 正則表達式本身就是一种语言,这在其他语言是通用的. 正則表達式(regular expression)描写叙述了一种字符串匹配的模式,能够用来检查一个串是否含有某种子串.将匹配的子串做替换或者从某个串中取出符合某个条件的子串等. str.indexOf('abc'); //精确匹配 仅仅能匹配字符串"abc" 正則表達式 //模糊匹配 Where name='zhangsan'; //精确匹配 Where name like 'zhang%'; //…
hive中实现正則表達式,与java中的正則表達式有所差别: 这里经过探索总结了一些: hive中的正则能够用,可是有所差别,差别在于原来的'\' 转义,这里变成了双斜杠了'\\' hive中的正则解析函数:regexp_extract; 比如:'匹配 10.122.248' select regexp_extract(host,'(^[\\w]+)\\.([\\w]+)\\.([\\w]+)',0) aa from browsewebpagelog where dt like '2014…
