Google的gson包

感觉在java中处理json蛮好用的一个工具类

import com.google.gson.JsonArray;
import com.google.gson.JsonElement;
import com.google.gson.JsonObject;
import com.google.gson.JsonParser;
import org.junit.jupiter.api.Test;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;

class JSONTest {

    @Test
    void test() throws FileNotFoundException {
        JsonParser parser = new JsonParser();
        String filepath = "C:\\Users\\kun\\Desktop\\category";
        File file = new File(filepath);
        File[] fileList = file.listFiles();
        if (fileList != null) {
            for (int i = 0; i < fileList.length; i++) {
                File value = fileList[i];
                JsonObject obj = (JsonObject) parser.parse(new FileReader(value));
                JsonArray array = obj.get("data").getAsJsonArray();
                JsonElement categoryId = null;
                JsonElement categoryName = null;
                JsonObject childObj = null;
                for (int j = 0; j < array.size(); j++) {
                    JsonObject subObject = array.get(j).getAsJsonObject();
                    //资料
//                    System.out.println(subObject.get("title_name").getAsString());
//                    String categoryIds = subObject.get("category_ids").getAsString();
//                    System.out.println(categoryIds.substring(1, categoryIds.length() - 1));
                    //类别
                    categoryId = subObject.get("Id");
                    categoryName = subObject.get("CategoryName");
                    JsonArray childArray = subObject.get("SonCategoryList").getAsJsonArray();
                    if (childArray.isEmpty()) {
                        System.out.println(categoryId + " : " + categoryName);
                    }
                    if (!childArray.isEmpty()) {
                        childObj = new JsonObject();
                        for (int k = 0; k < childArray.size(); k++) {
                            JsonObject categoryObj = childArray.get(k).getAsJsonObject();
                            String id = categoryObj.get("Id").getAsString();
                            JsonElement name = categoryObj.get("CategoryName");
                            childObj.add(id, name);
                        }
                        System.out.println(categoryId + " : " + categoryName + " ----> " + childObj.toString());
                    }
                }
            }
        }
    }
}

抓包获取了许多网页和wx小程序的json数据 ，使用此类扫描文件目录下的所有json文件，获取对应的kv，打印出来需要的数据。

标签：Google,get,JsonObject,import,subObject,gson,childArray
来源： https://www.cnblogs.com/leejk/p/16385328.html