单独测试 mybatis 环境
错误描述Caused by: org.apache.ibatis.exceptions.PersistenceException: ### Error building SqlSession. ### The error may exist in cn/bloghut/dao/StudentMapper.xml ### The error occurred while processing mapper_resultMap[StudentTeacher] ### Cause: org.apache.ibatis.builder.BuilderException: Error parsing SQL Mapper Configuration. Cause: org.apache.ibatis.builder.BuilderException: Error parsing Mapper XML. The XML location is 'cn/bloghut/dao/StudentMapper.xml'. Cause: java.lang.IllegalArgumentException: Mapped Statements collection already contains value for cn.bloghut.dao.StudentMapper.getStudents. please check cn/bloghut/dao/StudentMapper.xml and cn/bloghut/dao/StudentMapper.xml错误原因
mapper.xml文件 的标签标签 的id属性重名了
解决办法修改id属性的名字即可
