java - Integer can not be cast to JsonNode -

i got cast error , have no idea how solve that.

 //get json file map  map<string, jsonnode> cm = null;     try {         cm = mapper.readvalue(new file(path), map.class);     } catch (jsonparseexception e) {...}    //add key, value pairs map   jsonnodefactory factory = jsonnodefactory.instance;     objectnode node = factory.objectnode();     //add jsonnode   node.putall(cm); 

so exception cause 1 of key-value pairs looks this: {"id":7} , seems there no way of converting integer(7) json if 1 before.

any ideas?

the exeption:

   exception in thread "main" java.lang.classcastexception: java.lang.integer cannot    cast com.fasterxml.jackson.databind.jsonnode 

you not specify type of keys , values in mapping:

mapper.readvalue(new file(path), map.class); 

the result jackson try , map best type knows; member name, easy, it's string; value, reads json number, json number has no decimal points, fits int --> integer is.

if want explicit serialization given value type, have this:

mapper.readvalue(new file(path), new typereference<map<string, jsonnode>>() {});