正则表达式验证示例

import java.util.regex.Pattern;
/**
* 校验器：利用正则表达式校验邮箱、手机号等
*
* @author
*
*/
public class Validator {
/**
* 正则表达式：验证用户名
*/
//public static final String REGEX_USERNAME = "^[a-zA-Z]\w{5,17}$";
public static final String REGEX_USERNAME = "^[a-zA-Z]\w{2,20}$";

/**
* 正则表达式：验证密码
*/
public static final String REGEX_PASSWORD = "^[a-zA-Z0-9]{6,16}$";

/**
* 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}$";
public static final String REGEX_MOBILE = "^((13[0-9])|(15[^4,\D])|(17[0-9])|(18[0-9]))\d{8}$";

/**
* 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,}$";

/**
* 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);
}

/**
* 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);
}

/**
* 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);
}

/**
* 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));

}

}