import java.io.*;
public class RingDemo
{
public static void main(String[] args)
{
String strIn = "";
System.out.print("请输入矩阵的行列数:");
InputStreamReader input = new InputStreamReader(System.in);
BufferedReader buff = new BufferedReader(input);
try
{
strIn = buff.readLine();
}
catch (IOException e)
{ System.out.println(e.toString());
}
int int1 = Integer.parseInt(strIn);
int n = int1;
System.out.println("这是行列数为" + n + "的螺线型数组:");
int intA = 1;
// 初始化
int[][] array = new int[n][n];
int intB;
if (n % 2 != 0) {
intB = n / 2 + 1;
// 奇数时i循环次数
} else
intB = n / 2;
// 偶数时i循环次数
for (int i = 0; i < intB; i++) {
// 从外到里循环
// 从左到右横的开始
for (int j = i; j < n - i; j++) {
array[j] = intA;
intA++;
}
// 从上到下纵
for (int k = i + 1; k < n - i; k++) {
array[k][n - i - 1] = intA;
intA++;
}
// 从右到左横
for (int l = n - i - 2; l >= i; l--) {
array[n - i - 1][l] = intA;
intA++;
}
// 从下到上纵
for (int m = n - i - 2; m > i; m--) {
array[m] = intA;
intA++;
}
}
// 输出数组
for (int i = 0; i < n; i++) {
for (int j = 0; j < n; j++) {
System.out.print(array[j] + " ");
} System.out.println();
}
}
}
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