简单正则（复习）

来源：互联网发布：可牛影像mac版编辑：程序博客网时间：2024/05/22 17:36
import java.util.*;import java.util.regex.*;class Regex {public static void main(String[] args) {test3();}public static void test3(){//邮箱匹配String mail = "addf12@sina.com";String regex = "[a-zA-Z0-9_]+@[a-zA-Z0-9_]+\\.[a-zA-Z]{2,3}";System.out.println(mail.matches(regex));}public static void test2(){//ip地址排序String ip_str = "10.21.130.111   12.210.15.1  15.12.12.1   152.152.15.151   13.151.15.1";ip_str = ip_str.replaceAll("(\\d+)","00$1");//补齐0System.out.println(ip_str);ip_str = ip_str.replaceAll("0*(\\d{3})","$1");//去掉多余的0System.out.println(ip_str);//用TreeSet排序。String[] ips = {"10.21.130.111","12.210.15.1","15.12.12.1","152.152.15.151","13.151.15.1"};}public static void test1(){//治疗口吃String str = "我我我我....我我我...要.要.要要要要..学学学学....学编编编...编编程..程...程程....程程";str = str.replaceAll("\\.+","");System.out.println(str);str = str.replaceAll("(.)\\1+","$1");System.out.println(str);}public static void f4(){//huo quString str = "da jia hao ,ming tian bu fang jia!";/*将正则规则进行对象的封装Pattern p = Pattern.compile("a*b");通过正则对象的matcher方法与字符创串相关联、获取要对字符串操作的匹配器对象MatcherMatcher m = p.matcher("aaaaab");通过Matcher匹配器对象的方法对字符串进行操作boolean b = m.matches();*/String regex = "\\b[a-z]{3}\\b";Pattern p = Pattern.compile(regex);Matcher m = p.matcher(str);while(m.find()){System.out.print(m.group());System.out.println(m.start()+":"+m.end());}/*jiahaojia*/}public static void f3(){//ti huan String str = "xiaoqiangttttzhangsanmmmmmzhaoliu";str = str.replaceAll("(.)\\1+","$1");System.out.println(str);String tel = "15700001111";tel = tel.replaceAll("(\\d{3})(\\d{4})(\\d{4})","$1****$3");System.out.println(tel);//157****1111}public static void f2(){//fen geString str = "xiaoqiangttttzhangsanmmmmmzhaoliu";String[] name = str.split("(.)\\1+");for(String s:name){System.out.println(s);}}public static void f1(){//pi peiString regex = "1[358]\\d{9}";String s = "211215121";Scanner sc = new Scanner(System.in);while((s=sc.nextLine())!=null){System.out.println(s.matches(regex));}}}
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