首页 > 代码库 > java String matches 正则表达
java String matches 正则表达
- package test;
- /**
- * 在String的matches()方法,split()方法中使用正则表达式.
- * @author fhd001
- */
- public class RegexTest {
- public static void main(String[] args) {
- /*
- * 普通字符
- */
- String str1 = "abc45abc345";
- String[]arr1 = str1.split("abc");
- for (String string : arr1) {
- System.out.print(string+"-->");
- }
- System.out.println();
- /*
- * 简单的转义字符
- * 在java中转义字符时一定要用双反斜线,两个斜线转义成一个斜线,
- * 在用这个斜线字符转义那些特殊字符.
- */
- String str2 = "^$()[]{}.?+*|";
- boolean flag = str2.matches("//^//$//(//)//[//]//{//}//.//?//+//*//|");
- System.out.println(flag);
- /*
- * 转义字符 /Q.../E.
- */
- String str3 = "^$()[]{}.?+*|99999";
- boolean flag2 = str3.matches("//Q^$()[]{}.?+*|//E//d{5}");
- System.out.println(flag2);
- /*
- * 字符集合
- */
- String str4 = "dfddri334";
- boolean flag4 = str4.matches(".+");
- System.out.println(flag4);
- String str5 = "#$%^*())%";
- boolean flag5 = str5.matches("//W{9}");
- System.out.println(flag5);
- String str6 = "4gffmdkekrhhr";
- boolean flag6 = str6.matches("//w+");
- System.out.println(flag6);
- String str7 = "fjfdke eett ";
- boolean flag7 = str7.matches("//w+//s+//w{4}//s?");
- System.out.println(flag7);
- String str8 = " erefff ";
- boolean flag8 = str8.matches("//s+//S+//s+");
- System.out.println(flag8);
- String str9 = "456776888";
- boolean flag9 = str9.matches("//d+");
- System.out.println(flag9);
- String str10 = "rtydfgrgwvr ";
- boolean flag10 = str10.matches("//D+");
- System.out.println(flag10);
- /*
- * 自定义字符集合 [ ]
- */
- String str11 = "fdfeetg 34566";
- boolean flag11 = str11.matches("[fdetg]+//s+[3-6]+");
- System.out.println(flag11);
- String str12 = "rtyuie 5768";
- boolean flag12 = str12.matches("[^abcdf]+//s+[^1234]+");
- System.out.println(flag12);
- /*
- * 匹配次数限定符
- */
- //贪婪模式
- String str13 = "ytreggcv454444444333";
- boolean flag13 = str13.matches("//w{20}");
- System.out.println(flag13);
- boolean flag14 = str13.matches("//w{10,21}");
- System.out.println(flag14);
- boolean flag15 = str13.matches("//w{18,}");
- System.out.println(flag15);
- String str14 = "4";
- boolean flag16 = str14.matches("//d?");
- System.out.println(flag16);
- String str15 = "ddcvgt";
- boolean flag17 = str15.matches("//D+//d?");
- System.out.println(flag17);
- String str16 = "e33tf44t44t";
- boolean flag18 = str16.matches("//w+//W*");
- System.out.println(flag18);
- //勉强模式(只举一例)
- String str17 = "34567ghjkkld";
- boolean flag19 = str17.matches("//d{2,7}?//w{8,11}");
- System.out.println(flag19);
- //占有模式(只举一例)
- String str18 = "22222ddddd";
- boolean flag20 = str18.matches("//d{2,5}+//w{6}");
- System.out.println(flag20);
- /*
- * 字符边界
- */
- String str19 = "a444545rot44tm";
- boolean flag21 = str19.matches("^a//w+m$");
- System.out.println(flag21);
- /*
- * 选择表达式 xxx | xxx
- */
- String str20 = "abc123abc";
- boolean flag22 = str20.matches("(abc|123){3}");
- System.out.println(flag22);
- /*
- * 分组 ( ).
- * 以上修饰符都是针对一个字符进行修饰.如果要对一组字符进行
- * 修饰就要用到()
- */
- String str21 = "123qwe123qwe";
- boolean flag23 = str21.matches("(123qwe){2}");
- System.out.println(flag23);
- /*
- * []中的交集与并集
- */
- String str22 = "abcdefgh1234567";
- boolean flag24 = str22.matches("[a-z1-9]+"); //并集
- System.out.println(flag24);
- boolean flag25 = str22.matches("[a-z1-9&&[a-h1-7]]+"); //交集
- System.out.println(flag25);
- }
- }
结果代码
- -->45-->345-->
- true
- true
- true
- true
- true
- true
- true
- true
- true
- true
- true
- true
- true
- true
- true
- true
- true
- true
- false
- true
- true
- true
- true
- true
java String matches 正则表达
声明:以上内容来自用户投稿及互联网公开渠道收集整理发布,本网站不拥有所有权,未作人工编辑处理,也不承担相关法律责任,若内容有误或涉及侵权可进行投诉: 投诉/举报 工作人员会在5个工作日内联系你,一经查实,本站将立刻删除涉嫌侵权内容。