java.util.regex.Pattern正则表达式写验证器示例
import java.util.regex.Pattern;<br> /** * 校验器:利用正则表达式校验邮箱、手机号等 * */<br><br> public class Validator { <br>/** * 正则表达式:验证用户名 */ //public static final String REGEX_USERNAME = "^[a-zA-Z]\\w{5,17}$"; public static final String REGEX_USERNAME = "^[a-zA-Z]\\w{2,20}$"; <br> /** * 正则表达式:验证密码 */ public static final String REGEX_PASSWORD = "^[a-zA-Z0-9]{6,16}$"; <br> /** * 正则表达式:验证手机号 */ // public static final String REGEX_MOBILE = "^((13[0-9])|(15[^4,\\D])|(18[0,5-9]))\\d{8}$"; public static final String REGEX_MOBILE = "^((13[0-9])|(15[^4,\\D])|(17[0-9])|(18[0-9]))\\d{8}$"; <br> /** * 正则表达式:验证邮箱 */ public static final String REGEX_EMAIL = "^([a-z0-9A-Z]+[-|\\.]?)+[a-z0-9A-Z]@([a-z0-9A-Z]+(-[a-z0-9A-Z]+)?\\.)+[a-zA-Z]{2,}$"; <br> /** * 校验用户名 * * @param username * @return 校验通过返回true,否则返回false */ public static boolean isUsername(String username) { return Pattern.matches(REGEX_USERNAME, username); } <br> /** * 校验密码 * * @param password * @return 校验通过返回true,否则返回false */ public static boolean isPassword(String password) { return Pattern.matches(REGEX_PASSWORD, password); } <br> /** * 校验手机号 * * @param mobile * @return 校验通过返回true,否则返回false */ public static boolean isMobile(String mobile) { return Pattern.matches(REGEX_MOBILE, mobile); } <br> /** * 校验邮箱 * * @param email * @return 校验通过返回true,否则返回false */ public static boolean isEmail(String email) { return Pattern.matches(REGEX_EMAIL, email); } public static void main(String[] args) { String username = "fdsdfsdj"; System.out.println(Validator.isUsername(username)); } }