Convert string to JSON array

Question

I have the following string of a JSON from a web service and am trying to convert this to a JSONarray         locations                            lat    23 053                long    72 629                location    ABC                address    DEF                city    Ahmedabad                state    Gujrat                phonenumber    1234567                                    lat    23 053                long    72 629                location    ABC                address    DEF                city    Ahmedabad                state    Gujrat                phonenumber    1234567                                    lat    23 053                long    72 629                location    ABC                address    DEF                city    Ahmedabad                state    Gujrat                phonenumber    1234567                                    lat    23 053                long    72 629                location    ABC                address    DEF                city    Ahmedabad                state    Gujrat                phonenumber    1234567                                    lat    23 053                long    72 629                location    ABC                address    DEF                city    Ahmedabad                state    Gujrat                phonenumber    1234567                      I validated this String online  it seems to be correct  Now I am using the following code in android development to utilise  JSONArray jsonArray   new JSONArray readlocationFeed     This throws exception a type mismatch Exception

User · Answer

String b         readlocationFeed        JSONArray jsonArray1   new JSONArray b   jsonarray length1   jsonArray1 length    for  int i   0  i  lt  jsonarray length1  i           or convert it in JSONOBJECT  JSONObject jsonobj   new JSONObject readlocationFeed   JSONArray jsonArray   jsonobj getJSONArray  locations

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Input String                userName    sandeep          age   30                    userName    vivan          age   5          Simple Way to Convert String to JSON  public class Test        public static void main String   args  throws JSONException               String data        userName      sandeep     age   30     userName      vivan     age   5               JSONArray jsonArr   new JSONArray data            for  int i   0  i  lt  jsonArr length    i                          JSONObject jsonObj   jsonArr getJSONObject i                System out println jsonObj                        Output    userName   sandeep   age  30    userName   vivan   age  5

User · Answer

Try this piece of code   try               Log e  log tag    Error in convert String    result toString         JSONObject json data   new JSONObject result        String status   json data getString  Status                  String data   json data getString  locations            JSONArray json data1   new JSONArray data           for  int i   0  i  lt  json data1 length    i                  json data   json data1 getJSONObject i                String lat   json data getString  lat                String lng   json data getString  long

User · Answer

you will need to convert given string to JSONObject instead of JSONArray because current String contain JsonObject as root element instead of JsonArray    JSONObject jsonObject   new JSONObject readlocationFeed

User · Answer

Using json lib -  String data     A   a   B   b   C   c   D   d   E   e   F   f   G   g      Object object null  JSONArray arrayObj null  JSONParser jsonParser new JSONParser    object jsonParser parse data   arrayObj  JSONArray  object  System out println  Json object      arrayObj     Using GSON lib -  Gson gson   new Gson    String data      A     a     B     b     C     c     D     d     E     e     F     f     G     g       JsonParser jsonParser   new JsonParser    JsonArray jsonArray    JsonArray  jsonParser parse data

User · Answer

You can do the following   JSONArray jsonArray   jsnobject getJSONArray  locations        for  int i   0  i  lt  jsonArray length    i              JSONObject explrObject   jsonArray getJSONObject i

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Here you get JSONObject so change this line   JSONArray jsonArray   new JSONArray readlocationFeed      with following   JSONObject jsnobject   new JSONObject readlocationFeed     and after   JSONArray jsonArray   jsnobject getJSONArray  locations    for  int i   0  i  lt  jsonArray length    i          JSONObject explrObject   jsonArray getJSONObject i

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if the response is like this   GetDataResult        UserID   1   DeviceID     d1254     MobileNO     056688     Pak1   true   pak2   true   pak3   false   pak4   true   pak5   true   pak6   false   pak7   false   pak8   true   pak9   false   pak10   true   pak11   false   pak12   false      you can parse like this  JSONObject jobj new JSONObject response           String c   jobj getString  GetDataResult                     JSONArray jArray   new JSONArray c           deviceId jArray getJSONObject 0  getString  DeviceID      here the JsonArray size is 1 Otherwise you should use for loop for getting values

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It s a very simple way to convert   import java io BufferedReader  import java io FileReader  import java io IOException  import com google gson Gson  import com google gson JsonArray  import com google gson JsonElement  import com google gson JsonParser    class Usuario   private String username  private String email  private Integer credits  private String twitter username   public String getUsername         return username     public void setUsername String username        this username   username     public String getEmail         return email     public void setEmail String email        this email   email     public Integer getCredits         return credits     public void setCredits Integer credits        this credits   credits     public String getTwitter username         return twitter username     public void setTwitter username String twitter username        this twitter username   twitter username      Override public String toString         return  UserName      this getUsername       Email      this getEmail                 put string into file jsonFileArr json       username   Hello   email   hello email com   credits       100   twitter username            username   Goodbye   email   goodbye email com       credits   0   twitter username            username   mlsilva   email   mlsilva email com       credits   524   twitter username            username   fsouza   email   fsouza email com       credits   1052   twitter username            public class TestaGsonLista    public static void main String   args        Gson gson   new Gson        try           BufferedReader br   new BufferedReader new FileReader                   C   Temp  jsonFileArr json             JsonArray jsonArray   new JsonParser   parse br  getAsJsonArray            for  int i   0  i  lt  jsonArray size    i                  JsonElement str   jsonArray get i               Usuario obj   gson fromJson str  Usuario class               System out println obj               System out println str               System out println  -------                    catch  IOException e            e printStackTrace

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If having following JSON from web service  Json Array as a response              3   0      id  2  name   a561137   password   test   firstName   abhishek   lastName   ringsia   organization   bbb       - 1      id  3  name   a561023   password   hello   firstName   hello    lastName   hello    organization   hello    -  2       id  4   name   a541234    password   hello    firstName   hello    lastName   hello    organization   hello          have To Accept it first as a Json Array  then while reading its Object have to use Object Mapper readValue  because Json Object Still in String            List lt User gt  list   new ArrayList lt User gt           JSONArray jsonArr   new JSONArray response           for  int i   0  i  lt  jsonArr length    i              JSONObject jsonObj   jsonArr getJSONObject i            ObjectMapper mapper   new ObjectMapper            User usr   mapper readValue jsonObj toString    User class                 list add usr            mapper read is correct function  if u use mapper convert param param    It will give u error

[java] Convert string to JSON array

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