mybatis if test非空判断数字0为什么是false

springmvc+mybatis spring+springmvc+mybatis mybatis-plus mybatis-generator mybatis源码 mybatis3 mybatisplus mybatis plus mybatis generator mybatiscodehelperpro SpringBoot+MyBatis-Plus mybatiscodehelper Mybatis_plus mybatiscodehelper-pro TKMybatis tk.mybatis