身份证号码15位升级为18位

/**
 * 功能：把15位身份证转换成18位
 * 
 * @param id
 * @return newid or id
 */
public static final String getIDCard(String id) {
	// 若是15位，则转换成18位；否则直接返回ID
	if (15 == id.length()) {
		final int[] W = { 7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4,
				2, 1 };
		final String[] A = { "1", "0", "X", "9", "8", "7", "6", "5", "4",
				"3", "2" };
		int i, j, s = 0;
		String newid;
		newid = id;
		newid = newid.substring(0, 6) + "19"
				+ newid.substring(6, id.length());
		for (i = 0; i < newid.length(); i++) {

			j = Integer.parseInt(newid.substring(i, i + 1)) * W[i];
			s = s + j;
		}
		s = s % 11;
		newid = newid + A[s];

		return newid;
	} else {
		return id;
	}

}