How to filter the json response returning from spring rest web service

Question

How to filter the json response returning from spring rest web service.

When use call the customEvents i only need to outout the eventId and the Event name only. Whe

Answer 1

You can use @JsonFilter to archive.

Pojo:

@JsonFilter("myFilter")
public class User {
    ....
}

Controller:

public String getUser(
            @RequestParam(value="id") String id, 
            @RequestParam(value="requiredFields",required=false ) String requiredFields
        ) throws JsonParseException, JsonMappingException, IOException {

    //Get User 
    User user = userService.getUser(id);
    //Start
    ObjectMapper mapper = new ObjectMapper();
    // and then serialize using that filter provider:
    String json="";
    try {
        if (requiredFields!= null) {
            String[] fields = requiredFields.split("\\,");

            FilterProvider filters = new SimpleFilterProvider().addFilter("myFilter",
            SimpleBeanPropertyFilter.filterOutAllExcept(new HashSet(Arrays
                  .asList(fields))));

            json = mapper.filteredWriter(filters).writeValueAsString(user);//Deprecated 
        } else {
            SimpleFilterProvider fp = new SimpleFilterProvider().setFailOnUnknownId(false);
            mapper.setFilters(fp);
            json =mapper.writeValueAsString(user);
        }
    } catch (JsonGenerationException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (JsonMappingException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }

    return json;
}

Get URL: .....&requiredFields=id,Name,Age