删除“类型"从 JSON 输出球衣 moxy

How to remove the type from the JSON output that I have. I have a class/bean that contains output of a REST service.I'm using jersey-media-moxy to do the conversion.

服务

@Resource
public interface MyBeanResource
{
    @GET
    @Path("/example")
    @Produces( MediaType.APPLICATION_JSON )
    public Bean getBean();
}

豆子

@XmlRootElement
class Bean
{
   String a;
}  

我想添加一些功能(用于使用构造函数初始化 bean)

class BeanImpl extends Bean
{
    BeanImpl(OtherClass c)
    {
        a = c.toString()
    }
}