java - 如何生成随机数并将其导出为 JSON？

Question

我计划生成一个随机数并使用 json-simple 将其导出为 JSON。我有以下代码

public class Main implements JSONAware{

    private final int data;

    public Main(int data){
        this.data = data;
    }


    public String toJSONString(){
        StringBuffer sb = new StringBuffer();

        sb.append("[");

        sb.append(data);

        sb.append("]");
        sb.append(",");


        return sb.toString();
    }

    public static void main(String[] args){

        JSONArray da = new JSONArray();


        Random generator = new Random();
        int [][] grid;

        grid = new int[128][14];

        for (int row = 0; row < 128; row++){
            for (int col = 0; col < 14; col++){
                grid[row][col] = generator.nextInt(100);
//                da.add("%d",grid[row][col]);
                da.add(grid[row][col]);
            }
//            System.out.println();
        }
        System.out.println(da);

    }

打印如下:

[9,62,6,60,29,28,59,56,67,61,53,23,22,31,15,96,94,85,65,94,15,7 ,91,...]

但我试图将其打印为

[9,62,6,60,29,28,59,56,67,61,53,23,22,31,15,96,94,85,65,94,15,7,91,...],
[68,48,40,44,47,85,8,43,17,78,35,7,77,26,80,34,19,47,17,0,59,5,79,...],
.
.
.

谁能告诉我如何将行与列分开？

Answer 1

据我了解您的问题，您希望 128 行是单独的 JsonArray，即 1 行 = 1 JsonArray。
为此，你可以这样做:

public static void main(String[] args){

    JSONArray jArray = new JSONArray();

    Random generator = new Random();
    int [][] grid;

    grid = new int[128][14];

    for (int row = 0; row < 128; row++){
        JSONArray da = new JSONArray();
        for (int col = 0; col < 14; col++){
            grid[row][col] = generator.nextInt(100);
            da.add(grid[row][col]);
        }
        jArray.add(da);
    }
    System.out.println(jArray);

}