This article example for everyone to share java regular expression tool class specific code, for your reference, the specific content is as follows

import com.google.common.base.Strings;

import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
 *  Commonly used regular expressions
 * Created by tookbra on 2016/4/7.
 */
public class RegexUtils {
  /**
   *  Determine if it's true IP address
   *
   * @param ip
   * @return boolean true, Through the, false , didn't pass
   */
  public static boolean isIp(String ip) {
    if (Strings.isNullOrEmpty(ip))
      return false;
    String regex = "^(1\\d{2}|2[0-4]\\d|25[0-5]|[1-9]\\d|[1-9])\\."
        + "(1\\d{2}|2[0-4]\\d|25[0-5]|[1-9]\\d|\\d)\\."
        + "(1\\d{2}|2[0-4]\\d|25[0-5]|[1-9]\\d|\\d)\\."
        + "(1\\d{2}|2[0-4]\\d|25[0-5]|[1-9]\\d|\\d)$";
    return ip.matches(regex);
  }
  /**
   *  Determine if it is the correct email address
   *
   * @param email
   * @return boolean true, Through the, false , didn't pass
   */
  public static boolean isEmail(String email) {
    if (Strings.isNullOrEmpty(email))
      return false;
    String regex = "\\w+([-+.]\\w+)*@\\w+([-.]\\w+)*\\.\\w+([-.]\\w+)*";
    return email.matches(regex);
  }
  /**
   *  To determine whether it contains Chinese characters, only Chinese characters, not punctuation
   * @param text
   * @return boolean true, Through the, false , didn't pass
   */
  public static boolean isChinese(String text) {
    if (Strings.isNullOrEmpty(text))
      return false;
    Pattern p = Pattern.compile("[\u4e00-\u9fa5]");
    Matcher m = p.matcher(text);
    return m.find();
  }
  /**
   *  Determine if it is a positive integer
   *
   * @param number
   *       digital
   * @return boolean true, Through the, false , didn't pass
   */
  public static boolean isNumber(String number) {
    if (Strings.isNullOrEmpty(number))
      return false;
    String regex = "[0-9]*";
    return number.matches(regex);
  }
  /**
   *  Determine the decimal places ( A positive number )
   *
   * @param decimal
   *       digital
   * @param count
   *       Decimal digits
   * @return boolean true, Through the, false , didn't pass
   */
  public static boolean isDecimal(String decimal, int count) {
    if (Strings.isNullOrEmpty(decimal))
      return false;
    String regex = "^(-)?(([1-9]{1}\\d*)|([0]{1}))(\\.(\\d){" + count
        + "})?$";
    return decimal.matches(regex);
  }
  /**
   *  Determine whether it is a mobile phone number
   *
   * @param phoneNumber
   *       Mobile phone number
   * @return boolean true, Through the, false , didn't pass
   */
  public static boolean isMobilePhoneNumber(String phoneNumber) {
    if (Strings.isNullOrEmpty(phoneNumber))
      return false;
    String regex = "^((13[0-9])|(15[0-9])|(18[1-9]))\\d{8}$";
    return phoneNumber.matches(regex);
  }

  /**
   *  Determine if it's a cell phone number
   *
   * @param phoneNumber
   *       Mobile phone number
   * @return boolean true, Through the, false , didn't pass
   */
  public static boolean isPhoneNumber(String phoneNumber) {
    if (Strings.isNullOrEmpty(phoneNumber))
      return false;
    String regex = "^1\\d{10}$";
    return phoneNumber.matches(regex);
  }
  /**
   *  Determine whether it contains special characters
   *
   * @param text
   * @return boolean true, Through the, false , didn't pass
   */
  public static boolean hasSpecialChar(String text) {
    if (Strings.isNullOrEmpty(text))
      return false;
    if (text.replaceAll("[a-z]*[A-Z]*\\d*-*_*\\s*", "").length() == 0) {
      //  If no special characters are included
      return true;
    }
    return false;
  }

  private static boolean isChinese(char c) {
    Character.UnicodeBlock ub = Character.UnicodeBlock.of(c);
    if (ub == Character.UnicodeBlock.CJK_UNIFIED_IDEOGRAPHS
        || ub == Character.UnicodeBlock.CJK_COMPATIBILITY_IDEOGRAPHS
        || ub == Character.UnicodeBlock.CJK_UNIFIED_IDEOGRAPHS_EXTENSION_A
        || ub == Character.UnicodeBlock.CJK_UNIFIED_IDEOGRAPHS_EXTENSION_B
        || ub == Character.UnicodeBlock.CJK_SYMBOLS_AND_PUNCTUATION
        || ub == Character.UnicodeBlock.HALFWIDTH_AND_FULLWIDTH_FORMS
        || ub == Character.UnicodeBlock.GENERAL_PUNCTUATION) {
      return true;
    }
    return false;
  }
}