18位身份证号码校验码的算法（JAVA）

    public static char doVerify(String id)
    {
        char pszSrc[]=id.toCharArray();
        int iS = 0;
        int iW[]={7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2};
        char szVerCode[] = new char[]{'1','0', 'X', '9', '8', '7', '6', '5', '4', '3', '2'};
        int i;
        for(i=0;i<17;i++)
        {
            iS += (int)(pszSrc[i]-'0') * iW[i];
        }
        int iY = iS%11;
        return szVerCode[iY];
    }