错误: org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.builder.IncompleteElementException: Could not find SQL statement to include with refid 'cn.mysteel.category.dao.impl.CategoryDaoImpl.category' at org.mybatis.spring.
1.<where></where>标签的作用 可以动态的添加where关键字 可以自动去掉第一个拼接条件的and关键字 <where> <if test="username!=null and username!=''"> and username like '%${username}%' </if> <if test="gender!=null and gender!=''"> and gen