Utils--字符串的帮助类
一个关于字符串过滤的工具类，主要时针对username和password的过滤
package com.bw.yun.utils; import java.security.MessageDigest; import java.util.regex.Pattern; public class StringUtils { /** * 6>username<32 首字母为a-zA-Z * * @param username * @return */ public static boolean checkUsername(String username) { return Pattern.matches("^[a-zA-Z]\\w{5,31}", username); } /** * 密码判断 32>password>6 * * @param password * @return */ public static boolean checkPassword(String password) { return Pattern.matches("\\d{6.32}", password); } /** * 密码使用MD5加密 * * @param s * @return */ public final static String MD5(String s) { char hexDigits[] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f' }; try { byte[] strTemp = s.getBytes(); MessageDigest mdTemp = MessageDigest.getInstance("MD5"); mdTemp.update(strTemp); byte[] md = mdTemp.digest(); int j = md.length; char str[] = new char[j * 2]; int k = 0; for (int i = 0; i < j; i++) { byte b = md[i]; str[k++] = hexDigits[b >> 4 & 0xf]; str[k++] = hexDigits[b & 0xf]; } return new String(str); } catch (Exception e) { return null; } } }
转载于:https://www.cnblogs.com/meiLinYa/p/9149167.html
相关资源：ember-pad：Ember字符串填充实用程序和帮助器-源码