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A
aem_noob
July 21, 2023
Solved

convert stringified array of objects to json object

  • July 21, 2023
  • 5 replies
  • 9340 views

hi this is more of a java based question but I could use some help here-

 

i have a stringified (json.stringify) javascript array of strings ["abc","efg","ijk"]

i want to convert it to a json object

 

JsonObject jsonObject = new Gson().fromJson(arrayOfStrings, JsonObject.class);
com.google.gson.JsonSyntaxException: Expected a com.google.gson.JsonObject but was com.google.gson.JsonArray

 

i have tried using JsonParser from gson, javax.json.stream but nothing seems to work.

Best answer by Rohan_Garg

If it is only an array of string you want, you can use the below - 

List<String> currentGroupIdsList = new ArrayList<String>(Arrays.asList(stringifiedArray.split(",")));

Here stringifiedArray is received from the frontend and converted into simple <List> of strings.

Hope this helps! 

5 replies

S
Community Advisor
ShubhanshuSi2Community Advisor
Community Advisor
July 21, 2023

Try .fromJson(arrayOfStrings, JsonArray,class)  instead of converting it into JsonObject.class


    A
    aem_noobAuthor
    July 25, 2023

    i tried into jsonarray too but that didn't work

    Nilesh_Mali
    Nilesh_Mali
    July 21, 2023

    To fix this, you should use the appropriate data structure for deserializing the JSON array. In this case, you should use JsonArray instead of JsonObject since the input is an array of strings.

     

     

    String arrayOfStrings = "[\"abc\",\"efg\",\"ijk\"]"; // Parse the JSON array into a JsonArray JsonArray jsonArray = new Gson().fromJson(arrayOfStrings, JsonArray.class); // Now you can work with the JsonArray as needed sout(jsonArray); // Output: ["abc","efg","ijk"]

     

     

    JsonArray object is ready here to access the individual elements within the array if needed

      A
      aem_noobAuthor
      July 25, 2023

      I have tried json array too but that throws an error too.

      nitesh_kumar-1
      Adobe Employee
      nitesh_kumar-1Adobe Employee
      Adobe Employee
      July 21, 2023

      Hi @aem_noob ,

       

      I don't know what a full string looks like, but this seems to be JsonArray, try using that class instead.

       

      JsonArray jsonArray =  new Gson().toJsonTree(arrayOfStrings).getAsJsonArray();

      You could then iterate and read the JsonObject in this array, or form the proper JsonString which would qualify as JsonObject.

      Also, check https://www.tutorialspoint.com/how-to-convert-java-array-or-arraylist-to-jsonarray-using-gson-in-java 

       

      Hope this helps.

       

      Regards,

      Nitesh

       

        A
        aem_noobAuthor
        July 25, 2023

        i tried jsonarray initially but that also threw an exception. the response from front end is a json of array objects which is then filtered to array of strings. the array of strings is not getting cast to jsonarray.

        ksh_ingole7
        Community Advisor
        ksh_ingole7Community Advisor
        Community Advisor
        July 21, 2023

        Hi @aem_noob 

         

        Try this ->

         

        const array = ["abc", "efg", "ijk"];

         

        // Convert array to JSON object const jsonObject = JSON.stringify(array);

         

        console.log(jsonObject);

          A
          aem_noobAuthor
          July 25, 2023

          The array of strings is not getting cast to jsonObject as I have tried it

          Rohan_Garg
          Community Advisor
          Rohan_GargCommunity AdvisorAccepted solution
          Community Advisor
          July 25, 2023

          If it is only an array of string you want, you can use the below - 

          List<String> currentGroupIdsList = new ArrayList<String>(Arrays.asList(stringifiedArray.split(",")));

          Here stringifiedArray is received from the frontend and converted into simple <List> of strings.

          Hope this helps! 

            A
            aem_noobAuthor
            July 25, 2023

            this works but isn't it possible to do it via jsonArray or jsonObject?

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