MD5Util

import java.security.MessageDigest;

import org.apache.commons.codec.digest.DigestUtils;

import com.game.common.Contants;

public class MD5Util {
	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[] btInput = s.getBytes();
			// 获得MD5摘要算法的 MessageDigest 对象
			MessageDigest mdInst = MessageDigest.getInstance("MD5");
			// 使用指定的字节更新摘要
			mdInst.update(btInput);
			// 获得密文
			byte[] md = mdInst.digest();
			// 把密文转换成十六进制的字符串形式
			int j = md.length;
			char str[] = new char[j * 2];
			int k = 0;
			for (int i = 0; i < j; i++) {
				byte byte0 = md[i];
				str[k++] = hexDigits[byte0 >>> 4 & 0xf];
				str[k++] = hexDigits[byte0 & 0xf];
			}
			return new String(str);
		} catch (Exception e) {
			e.printStackTrace();
			return null;
		}
	}

	public static void main(String[] args) {
		System.out.println(MD5Util.MD5("~!@#$wc_123456"));
		System.out.println(MD5Util.MD5("加密"));
	}

	public static String getOldMD5String(String account, String password) {
		return MD5Util.MD5(Contants.PWD_MD5_KEY + account.trim().toUpperCase() + password.toUpperCase());
	}

	public static String getMD5String(String account, String password) {
		return MD5Util.MD5(Contants.PWD_MD5_KEY + account.trim().toUpperCase() + password);
	}
	
	public final static String md5(String s) {
		return DigestUtils.md5Hex(s);
	}
}