why Invalid bound statement

[刘志]

mybatis version 3.5.16

There are three injection methods

<mappers>
        <mapper resource="com.tutorial.mybatis.mapper/BlogMapper.xml"/>
        <mapper resource="com.tutorial.mybatis.mapper/UserMapper.xml"/>
        <mapper resource="com.tutorial.mybatis.mapper/OrderMapper.xml"/>
        <mapper resource="com.tutorial.mybatis.mapper/BookMapper.xml"/>
        <mapper resource="com.tutorial.mybatis.mapper/AnimalMapper.xml"/>
        <mapper resource="com.tutorial.mybatis.mapper/FoodMapper.xml"/>
</mappers>

 <mappers>
        <mapper class="com.tutorial.mybatis.mapper.BlogMapper"/>
        <mapper class="com.tutorial.mybatis.mapper.UserMapper"/>
        <mapper class="com.tutorial.mybatis.mapper.OrderMapper"/>
        <mapper class="com.tutorial.mybatis.mapper.BookMapper"/>
        <mapper class="com.tutorial.mybatis.mapper.AnimalMapper"/>
        <mapper class="com.tutorial.mybatis.mapper.FoodMapper"/>
</mappers>

<mappers>
  <package name="com.tutorial.mybatis.mapper"/>
</mappers>

Only the resource method can take effect, the other two are invalid bindings

The directory structure is as follows src/main/java └── com └── tutorial └── mybatis └── mapper ├── FoodMapper.java ├── UserMapper.java src/main/resources └── com └── tutorial └── mybatis └── mapper ├── FoodMapper.xml ├── UserMapper.xml I don’t quite understand why this problem occurs. Please help me solve it as soon as possible.

[Iwao AVE!]

Hello,

If the directory structure is …

└── com
    └── tutorial
        └── mybatis
            └── mapper
                └── BlogMapper.xml

… the config should look as follows:

<mapper resource="com/tutorial/mybatis/mapper/BlogMapper.xml"/>

If MyBatis finds the XML mapper with the following config ….

<mapper resource="com.tutorial.mybatis.mapper/BlogMapper.xml"/>

… it means that the directory structure is wrong.

└── com.tutorial.mybatis.mapper
    └── BlogMapper.xml

And that is why specifying class or package does not work.

It is difficult to differentiate the directory structures in some IDEs.
Check it using the system’s file manager (e.g. Finder, Explorer).

Regards,
Iwao

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