Returning JSON Object from REST Web Service with Complex Objects

I hope this might help a bit,
Following is an working example for returning a json object which was constructed using Gson and tested with Poster and the url is domainname:port//Project_name/services/rest/getjson?name=gopi

Construct a complex Object as you like and finally convert to json using Gson.

  @Path("rest")public class RestImpl {@GET@Path("getjson")@Produces("application/json")public String restJson(@QueryParam("name") String name){    EmployeeList employeeList = new EmployeeList();    List<Employee> list = new ArrayList<Employee>();    Employee e = new Employee();    e.setName(name);    e.setCode("1234");    Address address = new Address();    address.setAddress("some Address");    e.setAddress(address);    list.add(e);    Employee e1 = new Employee();    e1.setName("shankar");    e1.setCode("54564");    Address address1 = new Address();    address.setAddress("Address ");    e1.setAddress(address);    list.add(e1);    employeeList.setEmplList(list);    Gson gson = new Gson();    System.out.println(gson.toJson(employeeList));    return gson.toJson(employeeList);}@GET@Produces("text/html")public String test(){    return "SUCCESS";}

}

PS: I dont want to give heads up for fight between Jackson vs Gson ;-)

@XmlRootElement

You need to use a libary with json annotations instead of xml annotations. ex: jackson (http://jackson.codehaus.org/). You can try to use a xml writer to write json.

@Produces("application/json")

When the classes are annotated with the json annotations, json will be returned.