spring - Jackson Json Object mapper : how to map an array? -

i trying map array backend api call. how can map data knowing :

the following classes used hold json array data :

    @data     private static class userlistbean {         private list<userbean> userlist;     }      @data     private static class userbean {         private string id;         private string username;         private string password;     } 

the json have following format (the following example have 1 item in it) :

[    {       "id":1,       "username":"bob",       "password":"403437d5c3f70b1329f37a9ecce02adbbf3e986"    } ] 

i using jackson , have tried following far keeps sending me exception

        final objectmapper mapper = new objectmapper();         mapper.configure(feature.fail_on_unknown_properties, false);         final objectreader reader = mapper.reader(userlistbean.class);         geohubaccountlistbean accounts = null;          try {             accounts = reader.readvalue(jsonstring);         } catch (final ioexception ex) {             log.error("cannot convert json list of users", ex);         } 

here final objectreader reader = mapper.reader(userlistbean.class); throws exception

can not deserialize instance of com.xxx.xxx$userlistbean out of start_array token 

any idea ?

thanks

well, if trying deserialize json object of type userlistbean, need deserialize jsonobject (java objects tend map jsonobjects).

therefore, outer json construct should object. outer json construct jsonarray.

your userlistbean has single field, list<userbean>. top level json construct (which jsonobject) should contain single field name 'userlist' value jsonarray (java collections tend map jsonarrays).

i think actual json looking for:

{   "userlist":[      {        "id":1,        "username":"bob",        "password":"403437d5c3f70b1329f37a9ecce02adbbf3e986"      }   ] } 

if have no control on json coming in, want ditch parent object userlistbean , deal directly list<userbean>, work json have provided.