将ajax调用，封装一个json，传入一个实体报错

代码如下：

 public class SeckillResult<T> {
    private boolean success;
    private T data;
    private String error;
    public SeckillResult(boolean success, T data) {
        this.success = success;
        this.data = data;
    }
    public SeckillResult(boolean success, String error) {
        this.success = success;
        this.error = error;
    }
    public boolean isSuccess() {
        return success;
    }
    public void setSuccess(boolean success) {
        this.success = success;
    }
    public T getData() {
        return data;
    }
    public void setData(T data) {
        this.data = data;
    }
    public String getError() {
        return error;
    }
    public void setError(String error) {
        this.error = error;
    }
}

 public class Exposer {
    private boolean exposed;
    private String md5;
    private long seckillId;
    private long now;
    private long start;
    private long end;
    @Override
    public String toString() {
        return "Exposer{" +
                "exposed=" + exposed +
                ", md5='" + md5 + '\'' +
                ", seckillId=" + seckillId +
                ", now=" + now +
                ", start=" + start +
                ", end=" + end +
                '}';
    }
    public Exposer(boolean exposed, String md5, long seckillId) {
        this.exposed = exposed;
        this.md5 = md5;
        this.seckillId = seckillId;
    }
    public Exposer(boolean exposed, long seckillId, long now, long start, long end) {
        this.exposed = exposed;
        this.seckillId = seckillId;
        this.now = now;
        this.start = start;
        this.end = end;
    }
    public Exposer(boolean exposed, long seckillId) {
        this.exposed = exposed;
        this.seckillId = seckillId;
    }
}

 @RequestMapping(value = "/{seckillId}/exposer",
            method = RequestMethod.GET,
            produces = {"application/json;charset=UTF-8"})
    @ResponseBody
    public SeckillResult<Exposer> exposer(@PathVariable Long seckillId){
        SeckillResult<Exposer> result;
        try
        {
            Exposer exposer = seckillService.exportSeckillUrl(seckillId);
            result = new SeckillResult<Exposer>(true,exposer);
        }catch (Exception e){
            logger.error(e.getMessage(),e);
            result = new SeckillResult<Exposer>(false,e.getMessage());
        }
        return result;
    }

exposer已正常返回了结果Exposer{exposed=true, md5='eeeedda1968c55747a15124c56f674a5', seckillId=1000, now=0, start=0, end=0}
result转化为json时报错：
com.fasterxml.jackson.databind.JsonMappingException:
No serializer found for class org.seckill.dto.Exposer
and no properties discovered to create BeanSerializer (
to avoid exception, disable SerializationFeature.FAIL_ON_EMPTY_BEANS) )
(through reference chain: org.seckill.dto.SeckillResult["data"])

看不出什么问题，请大家帮忙看一下

Exposer 类没有set和get方法

没有人帮忙，先顶一下

json串中使用的不是=而是：

楼主：
自定义类没有序列化
No serializer found for class org.seckill.dto.Exposer
and no properties discovered to create BeanSerializer

json字符串拼错了，应该用：连接不是=

Exposer 继承 BeanSerializer
如果没有 Exposer 可以继承 Serialiable

楼主：可以试一下