从JSON到2D数组 [英] from JSON to 2D array

问题描述

我有json，我想将它们存储为2D数组.

I have json and i want to store them 2D array.

这是我的json

[  
   {  
      "IsStudent":true,
      "Name":"Ali",
      "age":16,
      "ID":1
   },
   {  
      "IsStudent":false,
      "Name":"Emad",
      "age":17,
      "ID":2
   }
]

所以我想将所有信息存储到2D数组中:

so I want to store all the information to 2D array :

array [0] [0] = true

array[0][0] = true

array [0] [1] =阿里

array[0][1] = Ali

array [0] [2] = 16

array[0][2] = 16

array [0] [3] = 1

array[0][3] = 1

以此类推.

我尝试使用split和join来获取这些值，但这对我不起作用

I tried alot to get those values by using split and join but it doesn't work for me

JSONArray jarr2 = new JSONArray("my json is here");
String[] resultingArray = jarr.join("\":").split(",\"");
System.out.println(resultingArray[3]);

推荐答案

阅读json文件示例:

import java.io.FileNotFoundException;
import java.io.FileReader;
import java.util.Map;

import com.google.gson.JsonArray;
import com.google.gson.JsonElement;
import com.google.gson.JsonParser;


public class Test {

    public static void main(String[] args) {
        FileReader reader;
        try {
            reader = new FileReader("/test.json");
            JsonParser jsonParser =  new JsonParser();
            JsonArray array = (JsonArray) jsonParser.parse(reader);
            searchJsonElemnet(array);
        } catch (FileNotFoundException e1) {
            e1.printStackTrace();
        }
    }

    private static void searchJsonElemnet(JsonArray jsonArray){
        String[][] matrix = new String[2][4];
        int i =0;
        int j = 0;
        for (JsonElement jsonElement : jsonArray) {
             for (Map.Entry<String, JsonElement> entry : jsonElement.getAsJsonObject().entrySet()) {
                 matrix[i][j] = entry.getValue().toString();
                 j++;
            }
            i++;
            j = 0;
        }
        for (String[] row : matrix)
        {
            for (String value : row)
            {
                System.out.println(value);
            }
        }
    }

}

输出:

是 阿里" 16 1个 错误的 "Emad" 17 2

true "Ali" 16 1 false "Emad" 17 2

这篇关于从JSON到2D数组的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！