import java.util.Scanner;
public class HuixingJZ{
	public static void main(String[]args){
		Scanner sc=new Scanner(System.in);
		System.out.println("Please enter n:");
		int n=sc.nextInt();
		printJZ(n);
	}

	public static void printJZ(int n){
		int [][]A=new int[n][n];
		int t=1;
		int i=0;
		int j=0;
		for(int k=0;k<n/2;k++){//k代表第幾圈
			for(i=k,j=k;j<n-k-1;j++){//第一條邊
				A[i][j]=t++;
			}
			for(i=k,j=n-k-1;i<n-k-1;i++){//第二條邊
				A[i][j]=t++;
			}
			for(i=n-k-1,j=n-k-1;j>k;j--){//第三條邊
				A[i][j]=t++;
			}
			for(i=n-k-1,j=k;i>k;i--){//第四條邊
				A[i][j]=t++;
			}


		}
		if(n%2==1){
			A[n/2][n/2]=t;
		}

		for(i=0;i<n;i++){
			for (j=0;j<n;j++) {
				System.out.print(A[i][j]+" ");
			}
			System.out.println();
		}
	}

}
 

驗證：
Please enter n:
3
1 2 3
8 9 4
7 6 5

Please enter n:
5
1 2 3 4 5
16 17 18 19 6
15 24 25 20 7
14 23 22 21 8
13 12 11 10 9

Please enter n:
6
1 2 3 4 5 6
20 21 22 23 24 7
19 32 33 34 25 8
18 31 36 35 26 9
17 30 29 28 27 10
16 15 14 13 12 11
驗證成功！！！