org.apache.ibatis.binding.BindingException: Type interface com.ll.Mapper.UserMapper is not known to the MapperRegistry.
时间: 2023-07-17 18:06:00 浏览: 66
这个异常通常是因为 MyBatis 没有正确配置或注册 Mapper 类型导致的。请确保以下几点:
1. 确保在 MyBatis 配置文件中正确配置了 Mapper 扫描路径或手动注册了 Mapper 类型。例如,在 XML 配置文件中使用 `<mapper class="com.ll.Mapper.UserMapper" />` 或通过代码注册 `configuration.addMapper(UserMapper.class)`。
2. 检查 Mapper 接口的包路径是否正确。确保 Mapper 接口的包路径与配置文件中的扫描路径或注册路径一致。
3. 确保 Mapper 接口已经被正确编写,并且与对应的 SQL 映射文件或注解配置正确匹配。
如果以上步骤都检查无误,但仍然出现该异常,请检查是否存在版本不兼容或其他配置问题。
相关问题
org.apache.ibatis.binding.BindingException: Type interface qst.mapper.UserMapper is not known to the MapperRegistry.
引用中提到,出现这种情况的主要原因是主配置文件标签没有正确指向映射接口的配置文件。解决方案可以是检查<mapper>的class属性或resource属性,确保路径和文件名的正确性。在引用中还提到,使用命名参数可以在传递参数时给参数加上注解,示例代码如下所示:
```
public Employee getEmpByIdandName(@Param("id") Integer id, @Param("name") String name);
```
而在引用中,指定参数的方法如下所示:
```
<select id="getEmpByIdandName" resultType="com.qst.mybatis.Employee">
select * from employee where id = #{param1} and name= #{param2}
</select>
```
根据错误信息"org.apache.ibatis.binding.BindingException: Type interface qst.mapper.UserMapper is not known to the MapperRegistry.",请检查以下几个方面:
1. 确保UserMapper接口的包路径和文件名正确。
2. 确保主配置文件中的<mapper>标签中的class属性或resource属性引用了正确的UserMapper接口配置文件。
3. 确保UserMapper接口中的方法名和映射文件中的sql语句id一致。
org.apache.ibatis.binding.BindingException: Type interface com_atguigu.mybatis.mapper.UserMapper is not known to the MapperRegistry.
回答: 这个问题是由于核心配置文件中加载映射文件的包名写错导致的。具体来说,错误的包名是"com_atguigu.mybatis.mapper.UserMapper",而正确的包名应该是"com.atguigu.mybatis.mapper.UserMapper"。这个错误会导致MyBatis无法识别到UserMapper接口。解决这个问题的方法是将包名修改为正确的形式,即将"com_atguigu.mybatis.mapper"改为"com.atguigu.mybatis.mapper"。这样就能够正确加载映射文件并解决该异常。\[1\]\[2\]\[3\]
#### 引用[.reference_title]
- *1* [解决 - org.apache.ibatis.binding.BindingException: Type interface com.itheima.mapper.UserMapper...](https://blog.csdn.net/weixin_51730356/article/details/129260822)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v91^insert_down28v1,239^v3^insert_chatgpt"}} ] [.reference_item]
- *2* [解决org.apache.ibatis.binding.BindingException: Type interface is not known to the MapperRegistry.](https://blog.csdn.net/WHT869706733/article/details/123271534)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v91^insert_down28v1,239^v3^insert_chatgpt"}} ] [.reference_item]
- *3* [org.apache.ibatis.binding.BindingException: Type interface xxx.Mapper is not known to the MapperRegi](https://blog.csdn.net/RadNICkMan/article/details/125381881)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v91^insert_down28v1,239^v3^insert_chatgpt"}} ] [.reference_item]
[ .reference_list ]