集装箱编号校验

/**
 * 集装箱类
 * 
 * @author yaoba
 * @version 创建时间 2010-6-21 上午12:16:16
 */
public class Container {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		System.out.println(check("AMFU8505137"));
		System.out.println(check("TEXU2982987"));

	}

	/**
	 * 集装箱编号校验
	 * 
	 * @param no
	 * @return
	 */
	public static boolean check(String no) {
		if (no == null && no.length() != 11)
			return false;
		no = no.toUpperCase();
		int[] wi = new int[10];
		for (int i = 0; i <= 4; i++) {
			char ch = no.charAt(i);
			if (ch == 'A') {
				wi[i] = 10;
			} else if (ch >= 'V' && ch <= 'Z') {
				wi[i] = ch - 52;
			} else if (ch >= 'L' && ch <= 'U') {
				wi[i] = ch - 53;
			} else {
				wi[i] = ch - 54;
			}
		}
		for (int i = 4; i < 10; i++) {
			wi[i] = Integer.parseInt(no.substring(i, i + 1));
		}
		int sum = 0;
		for (int i = 0; i < wi.length; i++) {
			sum += wi[i] * Math.pow(2, i);
		}
		if (no.substring(0, 4) == "HLCU")
			sum -= 2; // hapaq lloyd的柜号与国际标准相差2
		return sum % 11 == Integer.parseInt(no.substring(10, 11));

	}
}