mybatis 报错 nested exception is org.apache.ibatis.type.TypeException

这个错误通常是因为 MyBatis 在映射结果集时无法找到正确的类型处理器。可以尝试以下几种解决方法：

1. 确认数据库中的数据类型与 Java 对象中的属性类型匹配。
2. 确认 MyBatis 的配置文件中已经注册了正确的类型处理器。
3. 如果使用了自定义类型处理器，可以检查其实现是否正确。

如果以上方法都无法解决问题，可以尝试在 MyBatis 的配置文件中开启日志，查看详细的错误信息。

相关问题

nested exception is org.apache.ibatis.type.TypeException

"nested exception is org.apache.ibatis.type.TypeException"是Mybatis框架中的一个异常，通常是由于类型转换错误导致的。这个异常通常会在Mybatis执行SQL语句时抛出，可能是由于Java对象和数据库中的数据类型不匹配导致的。解决这个问题的方法包括：
1.检查Java对象和数据库中的数据类型是否匹配。
2.检查Mybatis映射文件中的参数类型是否正确。
3.检查Mybatis映射文件中的SQL语句是否正确。
4.检查Mybatis配置文件中的类型处理器是否正确配置。
以下是一个解决Mybatis TypeException异常的例子：

// Mybatis映射文件中的SQL语句
<select id="getUserById" parameterType="int" resultType="User">
    select * from user where id = #{id}
</select>

// Java代码中的调用
int id = 1;
User user = sqlSession.selectOne("getUserById", id);

nested exception is org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.

nested exception is org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.exceptions.PersistenceException:
Error querying database. Cause: org.apache.ibatis.executor.ExecutorException: A query was run and no Result Maps were found for the Mapped Statement 'com.example.mapper.UserMapper.getUserById'. It's likely that neither a Result Type nor a Result Map was specified.
Cause: org.apache.ibatis.executor.ExecutorException: A query was run and no Result Maps were found for the Mapped Statement 'com.example.mapper.UserMapper.getUserById'. It's likely that neither a Result Type nor a Result Map was specified.

This exception is thrown when there is an issue with executing a query using MyBatis framework. In this case, the nested exception is org.apache.ibatis.exceptions.PersistenceException, which indicates that there was an error querying the database.

The specific error message states that no Result Maps were found for the Mapped Statement 'com.example.mapper.UserMapper.getUserById'. This means that either a Result Type or a Result Map was not specified for the query.

To resolve this issue, you need to make sure that the appropriate Result Type or Result Map is specified for the query in the MyBatis mapping file (XML) or in the annotation-based configuration.