进入详情页，控制台输出这些，json相关的代码部分都没有输出，不知道是啥原因

DEBUG org.mybatis.spring.SqlSessionUtils - Creating a new SqlSession
DEBUG org.mybatis.spring.SqlSessionUtils - SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@e50d4] was not registered for synchronization because synchronization is not active
DEBUG o.m.s.t.SpringManagedTransaction - JDBC Connection [com.mchange.v2.c3p0.impl.NewProxyConnection@1a6032d] will not be managed by Spring
 DEBUG com.anec.dao.SeckillDao.queryById - ==>  Preparing: SELECT seckill_id,name,number,start_time,end_time,create_time FROM seckill WHERE seckill_id = ?
 DEBUG com.anec.dao.SeckillDao.queryById - ==> Parameters: 1000(Long)
DEBUG com.anec.dao.SeckillDao.queryById - <==      Total: 1
DEBUG org.mybatis.spring.SqlSessionUtils - Closing non transactional SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@e50d4]