[英]How to parse JSON object into `Map<String, HashSet<String>>`
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<String, HashSet<String>>
。
Essentially I want to reverse this procedure. 本质上,我想逆转此过程。
All the code for this project can be found on my github page here , it's quite short. 该项目的所有代码都可以在我的github页面上找到 ,它很短。
update 更新
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()) );
}
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: 更新:
Use TypeToken
使用TypeToken
Type type = new TypeToken<Map<String, HashSet<String>>>(){}.getType();
map = (Map<String, HashSet<String>>) gson.fromJson(json, type);
Or you could parse it... 或者您可以解析它...
JSONObject
创建一个JSONObject
对象 HashMap
创建一个HashMap
对象 jsonObj.keys()
and for every key
get value
like jsonObj.getString(key)
. 遍历jsonObj.keys()
并为每个key
获取value
例如jsonObj.getString(key)
。 map
like map.put(key, value)
. 像map.put(key, value)
一样放在map
。
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