mybatis报错 Error instantiating interface com.atguigu.mybatis.dao.DepartmentMapper with invalid types () or values () 错因在于把 <association property="dept" select="com.atguigu.mybatis.dao.DepartmentMapper.getDeptById" column="d_id&q…

报错constructor found in com.atguigu.mybatis.bean.Department matching [java.lang.Integer, java.lang.String] 构造方法不匹配,因为反射中会使用默认的无参构造器,而当我们一旦写了新的带参构造方法,那么就不会存在无参构造方法了,需要重新写过.自己在相应的实体中写一个无参构造方法就可以了. 完整报错如下所示: org.apache.ibatis.exceptions.PersistenceExcept…

我的具体报错日志是   Error parsing SQL Mapper Configuration. Cause: java.io.IOException  Could not find resource com  dev-mapper.xml ...意识是找不到 我用maven管理,在target文件夹下并没有将dev-mapper.xml ,出错原因就是maven编译时没有将xml文件放进去,所以才会找不到  dev-mapper.xml文件 解决办法:在pom.xml中添加以下代码: 问…

报错org.apache.ibatis.binding.BindingException: Type interface com.atguigu.mybatis.bean.dao.EmployeeMapper is not known to the MapperRegistry. 我报这个错误的原因是因为mybatis-config.xml配置文件中 <!-- 批量注册: --> <package name="com.atguigu.mybatis.dao"/>…

org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.reflection.ReflectionException: Error instantiating class cn.edu.zju.springmvc.pojo.Items with invalid types () or values (). Cause: java.lang.NoSuchMethodException: cn.…

MySQL报错ERROR 1558 (HY000): Column count of mysql.user is wrong. 1.今天在使用MySQL创建数据库时出现如下报错: mysql> CREATE USER '; ERROR (HY000): Column count of mysql.user , found . Created with MySQL , now running . Please use mysql_upgrade to fix this error. 2.解决方法…

oracle+mybatis报错:BindingException("Invalid bound statement (not found): ") 从mysql转到oracle数据库:原来mysql保存数据的时候有的字段可以是Null值得,到了oracle里面,字段为null会报错. 于是乎使用了mybatis-plus插件. 在保存数据是email字段是可以为空的. @TableField(value="EMAIL", el="email, jdbcT…

今天在做ssm项目的时候出现了: 先是出现 了错误: mybatis报错:A query was run and no Result Maps were found for the Mapped Statement 这是因为Dao.xml中的select标签中必须指定要返回的值的类型(注意:是返回值的单个类型,即如果你是返回一个List<User>的话,需要指定的是User) 具体的这种错误的解决办法见:https://www.cnblogs.com/isme-zjh/p/11757155.h…

Mybatis 报错 builder.BuilderException: Error parsing SQL Mapper Configuration Caused by: org.apache.ibatis.builder.BuilderException: Error parsing SQL Mapper Configuration. Cause: java.io.IOException: Could not find resource com/xxx/dao/UserDao.xml 这个原…

运行项目报错 Error querying database. Cause: java.sql.SQLException: No suitable driver found for http://www.example.com org.apache.ibatis.exceptions.PersistenceException: ### Error querying database. Cause: java.sql.SQLException: No suitable driver found f…