螺旋矩阵输出

 1 private static void PrintMatrix(){
 2         //region 使用随机数构建矩阵（二维数组）
 3         long seed=System.currentTimeMillis();
 4         Random objRandom = null;
 5         int arrLength=4;
 6         int maxNumber=100;
 7         int[][] arr=new int[arrLength][arrLength];
 8         for(int i=0;i<arrLength;i++){
 9             for(int j=0;j<arrLength;j++){
10                 int tempNum =0;
11                 while (tempNum==0){
12                     objRandom = new Random(seed);
13                     tempNum = objRandom.nextInt(maxNumber);
14                     if(tempNum==0){
15                         seed=System.currentTimeMillis();
16                     }
17                 }
18                 seed=seed+tempNum;
19                 arr[i][j]=tempNum;
20             }
21         }
22         //endregion
23 
24         //region 输出矩阵（二维数组）
25         System.out.print("
");
26         System.out.print("
");
27         for(int i=0;i<arrLength;i++){
28             System.out.print("	");
29             for(int j=0;j<arrLength;j++){
30                  System.out.print(arr[i][j]);
31                  System.out.print("	");
32             }
33             System.out.print("
");
34         }
35         System.out.print("
");
36         System.out.print("
");
37         //endregion
38 
39         //region 螺旋输出矩阵内容
40         int up,down,left,right;
41         up=0;
42         down=arrLength-1;
43         left=0;
44         right=arrLength-1;
45 
46         boolean s1=false,s2=false;
47         while (true){
48             //从左往右
49             if(left<=right){
50                 for(int i=left;i<=right;i++){
51                     System.out.print(arr[up][i]+"	");
52                 }
53                 up++;
54             }else{
55                 s1=true;
56                 up++;
57             }
58 
59             //从上往下
60             if(up<=down){
61                 for(int i=up;i<=down;i++){
62                     System.out.print(arr[i][right]+"	");
63                 }
64                 right--;
65             }else{
66                 s2=true;
67                 right--;
68             }
69 
70 
71             //从右往左
72             if(left<=right){
73                 for(int i=right;i>=left;i--){
74                     System.out.print(arr[down][i]+"	");
75                 }
76                 down--;
77             }else{
78                 s1=true;
79                 down--;
80             }
81 
82             //从下往上
83             if(up<=down){
84                 for(int i=down;i>=up;i--){
85                     System.out.print(arr[i][left]+"	");
86                 }
87                 left++;
88             }else{
89                 s2=true;
90                 left++;
91             }
92 
93             if(s1==true && s2==true){
94                 break;
95             }
96         }
97         //endregion
98     }