在命令行输入一个自然数N,实现螺旋排列

public class Test {


    public static void main(String[] args) {

       /* String inputNum = "3";
        if ("3".equals(inputNum)) {
            System.out.println("01 02 03");
            System.out.println("08 09 04");
            System.out.println("07 06 05");
        }
        if ("6".equals(inputNum)) {
            System.out.println("01 02 03 04 05 06");
            System.out.println("20 21 22 23 24 07");
            System.out.println("19 32 33 34 25 08");
            System.out.println("18 31 36 35 26 09");
            System.out.println("17 30 29 28 27 10");
            System.out.println("16 15 14 13 12 11");
        }*/
        final int INPUT_NUMBER = 6;
        //0=右 1=下 2=左 3=上
        int direction = 0;
        int directionCount=0;
        int xLine = 0;
        int yLine = 0;
        int[][] intArray = new int[INPUT_NUMBER][INPUT_NUMBER];

        //初始化
        for (int x = 0; x < INPUT_NUMBER; x++) {
            for (int y = 0; y < INPUT_NUMBER; y++) {
                intArray[x][y] = 0;
            }
        }
        for (int x = 1; x <= INPUT_NUMBER * INPUT_NUMBER; x++) {
            switch (direction) {
                case 0:
                    if (yLine + 1 >= INPUT_NUMBER || (directionCount>=3 && intArray[xLine][yLine+1] != 0)) {
                        direction = ++direction % 4;
                        directionCount++;
                        intArray[xLine][yLine] = x;
                        xLine++;
                    } else {
                        intArray[xLine][yLine] = x;
                        yLine++;
                    }
                    break;
                case 1:

                    if (xLine + 1 >= INPUT_NUMBER || (directionCount>=3 && intArray[xLine+1][yLine] > 0)) {
                        direction = ++direction % 4;
                        directionCount++;
                        intArray[xLine][yLine] = x;
                        yLine--;
                    } else {
                        intArray[xLine][yLine] = x;
                        xLine++;
                    }
                    break;
                case 2:

                    if (yLine == 0 || (directionCount>=3 && intArray[xLine][yLine-1] > 0)) {
                        direction = ++direction % 4;
                        directionCount++;
                        intArray[xLine][yLine] = x;
                        xLine--;
                    } else {
                        intArray[xLine][yLine] = x;
                        yLine--;
                    }
                    break;
                case 3:

                    if (xLine== 0 || (directionCount>=3 && intArray[xLine-1][yLine] > 0)) {
                        direction = ++direction % 4;
                        directionCount++;
                        intArray[xLine][yLine] = x;
                        yLine++;
                    } else {
                        intArray[xLine][yLine] = x;
                        xLine--;
                    }
                    break;
            }
        }

        //打印
        System.out.println("***********************");
        for (int a = 0; a < INPUT_NUMBER; a++) {
            for (int b = 0; b < INPUT_NUMBER; b++) {
                System.out.print(" " + Test.padRight(String.valueOf(intArray[a][b]),5,'0'));
            }
            System.out.println(" ");
        }

    }
    /**
     * String右对齐
     *  前补位
     * @author
     */
    public static String padRight(String src, int len, char ch) {
        int diff = len - src.length();
        if (diff <= 0) {
            return src;
        }

        char[] charr = new char[len];
        System.arraycopy(src.toCharArray(), 0, charr, diff, src.length());
        for (int i = 0; i < diff; i++) {
            charr[i] = ch;
        }
        return new String(charr);
    }
}