java之Pattern.compile相关正则表达式

• java之Pattern.compile相关正则表达式

1.验证邮箱地址是否正确：String check = "^([a-z0-9A-Z]+[-|\\.]?)+[a-z0-9A-Z]@([a-z0-9A-Z]+(-[a-z0-9A-Z]+)?\\.)+[a-zA-Z]{2,}$";

import java.util.regex.Matcher;//jar包
import java.util.regex.Pattern;//jar包
public static boolean checkEmail(String email)
{
    boolean flag = false;
    try
　　{
        String check = "^([a-z0-9A-Z]+[-|\\.]?)+[a-z0-9A-Z]@([a-z0-9A-Z]+(-[a-z0-9A-Z]+)?\\.)+[a-zA-Z]{2,}$";
        Pattern regex = Pattern.compile(check);
        Matcher matcher = regex.matcher(email);
        flag = matcher.matches();
        } catch (Exception e) {
            flag = false;
        }
        return flag;
    }
}
                   

2.验证手机号码：String check="^((13[0-9])|(15[^4,\\D])|(18[0,5-9]))\\d{8}$"

3.校验密码长度：Pattern.compile("^\\w{6,20}$")//表示长度要在6至20之间