Regular expression to verify whether the QQ number is entered correctly
这次给大家带来正则表达式验证qq号码是否输入正确,正则表达式验证qq号码是否输入正确的注意事项有哪些,下面就是实战案例,一起来看一下。
废话不多说了,直接给大家贴代码了,具体代码如下所示:
package 正则表达式; /*对QQ号码进行校验 要求5~15位,不能以0开头,只能是数字*/ import java.util.regex.Matcher; import java.util.regex.Pattern; public class Test { public static void main(String[] args) { // TODO Auto-generated method stub String qq = "23412312"; String regex = "[1-9][0-9]{4,14}";//第一位1-9之间的数字,第二位0-9之间的数字,数字范围4-14个之间 //String regex2 = "[1-9]\\d{4,14}";//此句也可以 boolean flag = qq.matches(regex); if(flag) System.out.println("QQ号正确"); else System.out.println("QQ号错误"); } }
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