如何将JSON对象解析为`Map >`

I'd like to parse this JSON object:

我想解析这个JSON对象:

"{
  \"Rao\":[\"Q7293658\",\"\",\"Q7293657\",\"Q12953055\",\"Q3531237\",\"Q4178159\",\"Q1138810\",\"Q579515\",\"Q3365064\",\"Q7293664\",\"Q1133815\"],
  \"Hani Durzy\":[\"\"],
  \"Louise\":[\"\",\"Q1660645\",\"Q130413\",\"Q3215140\",\"Q152779\",\"Q233203\",\"Q7871343\",\"Q232402\",\"Q82547\",\"Q286488\",\"Q156723\",\"Q3263649\",\"Q456386\",\"Q233192\",\"Q14714149\",\"Q12125864\",\"Q57669\",\"Q168667\",\"Q141410\",\"Q166028\"],
  \"Reyna\":[\"Q7573462\",\"Q2892895\",\"Q363257\",\"Q151944\",\"Q3740321\",\"Q2857439\",\"Q1453358\",\"Q7319529\",\"Q733716\",\"Q16151941\",\"Q7159448\",\"Q5484172\",\"Q6074271\",\"Q1753185\",\"Q7319532\",\"Q5171205\",\"Q3183869\",\"Q1818527\",\"Q251862\",\"Q3840414\",\"Q5271282\",\"Q5606181\"]
}"

and with that data generate a Map<String, HashSet<String>>.

并使用该数据生成Map >。 ,hashset>

Essentially I want to reverse this procedure.

基本上我想要扭转这个过程。

All the code for this project can be found on my github page here, it's quite short.

这个项目的所有代码都可以在我的github页面上找到,它很短。

update

        File f = new File("/home/matthias/Workbench/SUTD/nytimes_corpus/wdtk-parent/wdtk-examples/JSON_Output/user.json");

        String jsonTxt = null;

        if (f.exists())
        {
            InputStream is = new FileInputStream("/home/matthias/Workbench/SUTD/nytimes_corpus/wdtk-parent/wdtk-examples/JSON_Output/user.json");
            jsonTxt = IOUtils.toString(is);


        }
        //System.out.println(jsonTxt);


        Gson gson=new Gson(); 


        Map<String, HashSet<String>> map = new HashMap<String, HashSet<String>>();
        map=(Map<String, HashSet<String>>) gson.fromJson(jsonTxt, map.getClass());

        //// \\ // ! PRINT IT ! // \\ // \\ // \\ // \\ // \\ // \\
       for (Map.Entry<String, HashSet<String>> entry : map.entrySet()) 
       {
           System.out.println(entry.getKey()+" : " + Arrays.deepToString(map.entrySet().toArray()) );
       }

1 个解决方案

#1

Using Gson

Gson gson = new Gson(); 
String json = "<YOUR_JSON_STRING_HERE>";
Map<String, HashSet<String>> map = new HashMap<String, HashSet<String>>();
map = (Map<String, HashSet<String>>) gson.fromJson(json, map.getClass());

Update:

Use TypeToken

Type type = new TypeToken<Map<String, HashSet<String>>>(){}.getType();
map = (Map<String, HashSet<String>>) gson.fromJson(json, type);

Or you could parse it...

或者你可以解析它......

Create an object of JSONObject

创建JSONObject的对象

Create an object of HashMap

创建HashMap的对象

Iterate over jsonObj.keys() and for every key get value like jsonObj.getString(key).

迭代jsonObj.keys()和每个键get值,如jsonObj.getString(key)。

Put it in the map like map.put(key, value).

将它放在map.put(key,value)中的地图中。

#1