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Regular expression to verify whether the QQ number is entered correctly

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Release: 2018-03-29 15:11:28
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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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