


Java uses regular expressions to implement verification function on registration page
本文给大家介绍java使用正则表达式对注册页面进行验证的代码,代码如下所示:
package regex; import java.util.Scanner; import java.util.regex.Matcher; import java.util.regex.Pattern; public class registered { public static void main(String[] args) { //注册用户 Scanner sc=new Scanner(System.in); System.out.println("请输入用户名:"); String uname=sc.next(); System.out.println("请输入密码:"); String passwd=sc.next(); System.out.println("请输入确认密码:"); String repasswd=sc.next(); /* String uname="wangheng"; String passwd="222assAS123"; String repasswd="432Pass123";*/ boolean b=uname.matches("\\w{3,10}"); //方法一 if(b==true){ Pattern p0=Pattern.compile(".{6,12}");//长度6到12个 Pattern p1=Pattern.compile(".*[A-Z]+");// Pattern p2=Pattern.compile(".*[a-z]+"); Pattern p3=Pattern.compile(".*\\d+"); Matcher m0=p0.matcher(passwd); Matcher m1=p1.matcher(passwd); Matcher m2=p2.matcher(passwd); Matcher m3=p3.matcher(passwd); if(m0.lookingAt()==true&& m1.lookingAt()==true&& m2.lookingAt()==true&& m3.lookingAt()==true){ boolean b2=passwd.matches(repasswd); if(b2){ System.out.println("注册成功!"); }else{ System.out.println("确认密码与密码不同!"); } }else{ System.out.println("密码输入错误!"); } }else{ System.out.println("用户名输入错误!"); } //方法二 Pattern p1=Pattern.compile("[A-Z]+"); Pattern p2=Pattern.compile("[a-z]+"); Pattern p3=Pattern.compile("\\d+"); Matcher m1=p1.matcher(passwd); Matcher m2=p2.matcher(passwd); Matcher m3=p3.matcher(passwd); if(uname.matches("\\w{3,10}")&&passwd.matches(".{6,12}")&&m1.find()&&m2.find()&&m3.find()){ System.out.println("注册成功!"); }else{ System.out.println("注册失败!"); } } }
以上所述是小编给大家介绍的Java使用正则表达式对注册页面进行验证功能实现,希望对大家有所帮助,如果大家有任何疑问请给我留言,小编会及时回复大家的。在此也非常感谢大家对PHP中文网的支持!
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