org.apache.ibatis.exceptions.PersistenceException:报错问题

org.apache.ibatis.exceptions.PersistenceException:报错问题

<!DOCTYPEmapper PUBLIC"-//mybatis.org//DTD config 3.0//EN""http://mybatis.org/dtd/mybatis-3-mapper.dtd">这个头文件有问题，中间应该是mapper

正确：<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">