java - 当 JSON 没有变量名时使用 gson 反序列化

Question

我有一个 Json 波纹管:

{
    "0001":[111, "BLABLA", "LALA", "KKK",80,20],
    "002":[222, "BLABLA", "LALA", "KKK",80,40],
    "003":[333, "BLABLA", "LALA", "KKK",100,20],
    "000":[444, "BLABLA", "LALA", "KKK",800,60],
    "555":[555, "BLABLA", "LALA", "KKK",80,20,
    "100":[48, "BLABLA", "LALA", "KKK",80,20]
}

我在 Gson 反序列化时遇到问题。我知道使用变量名称定义如下的 Json:

{
   "item":"001":["id":1,"description":"bla bla"],
   "item":"002":["id":2,"description":"bla bla"]
}

然后我使用与 json 相同的变量名定义类并执行解析

public class DataClass
{
  String item;
  int id;
  String description;

  getters and setters;

}

gson.fromJson (json, DataClass.class);

但我不知道如何执行此操作，以防我需要使用不带变量名的 json(在帖子开头)。有人可以帮忙吗？

Answer 1

本类(class)回答您的问题:

package stackoverflow.questions.q18116805;

import java.lang.reflect.Type;
import java.util.*;

import com.google.common.reflect.TypeToken;
import com.google.gson.Gson;

public class Q18116805 {


    public static void main(String[] args) {
        String json =                                                 
            "{  \"0001\":[111, \"BLABLA\", \"LALA\", \"KKK\",80,20],   "+
            "    \"002\":[222, \"BLABLA\", \"LALA\", \"KKK\",80,40],   "+
            "    \"003\":[333, \"BLABLA\", \"LALA\", \"KKK\",100,20],  "+
            "    \"000\":[444, \"BLABLA\", \"LALA\", \"KKK\",800,60],  "+
            "    \"555\":[555, \"BLABLA\", \"LALA\", \"KKK\",80,20],   "+
            "    \"100\":[48, \"BLABLA\", \"LALA\", \"KKK\",80,20]}";

        Type aType = new TypeToken<Map<String,ArrayList<Object>>>() {}.getType();
        Map<String,ArrayList<Object>> map = new Gson().fromJson(json, aType);

        System.out.println(map);
    }
}

这是结果:

{0001=[111.0, BLABLA, LALA, KKK, 80.0, 20.0], 002=[222.0, BLABLA, LALA, KKK, 80.0, 40.0], 003=[333.0, BLABLA, LALA, KKK, 100.0, 20.0], 000=[444.0, BLABLA, LALA, KKK, 800.0, 60.0], 555=[555.0, BLABLA, LALA, KKK, 80.0, 20.0], 100=[48.0, BLABLA, LALA, KKK, 80.0, 20.0]}