在springboot中使用ModelAndView返回json 会多出多余的字段信息
代码如下：

 public class TestDto implements Serializable {
    private static final long serialVersionUID = 1727826299653600584L;


    private int code;
    private String name;
    public int getCode() {
        return code;
    }

    public void setCode(int code) {
        this.code = code;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }
}

 @GetMapping("/test")
    public ModelAndView test(TestDto reqDto){

        TestDto respDto=new TestDto();
        respDto.setCode(1);
        respDto.setName("response name");

        //jackson config
        Jackson2ObjectMapperBuilder builder=new Jackson2ObjectMapperBuilder();
        ObjectMapper objectMapper=builder.build();
        SimpleModule simpleModule=new SimpleModule();
        simpleModule.addSerializer(Long.class, ToStringSerializer.instance);
        simpleModule.addSerializer(Long.TYPE,ToStringSerializer.instance);

        objectMapper.registerModule(simpleModule);
        objectMapper.configure(MapperFeature.PROPAGATE_TRANSIENT_MARKER,true);

        objectMapper.setTimeZone(TimeZone.getTimeZone("GMT+8"));
        objectMapper.setDateFormat(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"));

        MappingJackson2JsonView jonView=  new MappingJackson2JsonView(objectMapper);

        //return json
        ModelAndView modelAndView = new ModelAndView(jonView);
        modelAndView.addObject("message", respDto.getName());
        modelAndView.addObject("code",respDto.getCode());

        return modelAndView;
    }

运行起来后 访问这个接口
http://192.168.1.210:9046/monitor/job/test?name=request name

返回了信息

我如何得到正确的json信息
{ "code": 1, "message": "response name json field" }