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SPL(Structured Process Language) A programming language specially for structured data computing.

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package com.scudata.common;

/**
 * ???ܽ??ܹ?????
 *
 */
public class PwdUtils {
	static IPwd[] pp = new IPwd[1];;

	public static void set(IPwd p) {
		pp[0] = p;
	}

	public static IPwd get() {
		return pp[0];
	}

	static {
		set(new Pwd());
	}

	/**
	 * ????
	 * 
	 * @param pwd
	 *            Դ????
	 * @return ???ܺ??????
	 */
	public static String encrypt(String pwd) {
		return get().encrypt(pwd);
		// if (pwd == null)
		// return null;
		// int len = pwd.length();
		// StringBuffer sb = new StringBuffer(2 * len + 2);
		// for (int i = 0; i < len; i++) {
		// char c = pwd.charAt(i);
		// sb.append((char) ('a' + ((c >>> 12) & 0xf)));
		// sb.append((char) ('a' + ((c >>> 8) & 0xf)));
		// sb.append((char) ('a' + ((c >>> 4) & 0xf)));
		// sb.append((char) ('a' + (c & 0xf)));
		// }
		// return sb.toString();
	}

	/**
	 * ????
	 * 
	 * @param pwd
	 *            ???ܺ??????
	 * @return Դ????
	 */
	public static String decrypt(String pwd) {
		return get().decrypt(pwd);
		// if (pwd == null)
		// return null;
		// int len = pwd.length();
		// if (len % 4 != 0)
		// throw new RuntimeException("error encrypted password");
		// StringBuffer sb = new StringBuffer(len / 4);
		// for (int i = 0; i < len / 4; i++) {
		// char c = (char) (((pwd.charAt(4 * i) - 'a') & 0xf) << 12);
		// c += (char) (((pwd.charAt(4 * i + 1) - 'a') & 0xf) << 8);
		// c += (char) (((pwd.charAt(4 * i + 2) - 'a') & 0xf) << 4);
		// c += (char) ((pwd.charAt(4 * i + 3) - 'a') & 0xf);
		// sb.append(c);
		// }
		// return sb.toString();
	}

}