Annotations

Annotations

MyBatis-Plus infers table information based on the PO (Persistent Object) entity details to generate SQL. By default:

• MyBatis-Plus converts the PO entity class name from camelCase to snake_case for the table name.
• MyBatis-Plus converts all variable names in the PO entity from camelCase to snake_case for the column names, and infers the column types from the variable types.
• MyBatis-Plus treats a field named id as the primary key. However, the default implementation often does not match actual scenarios, so MyBatis-Plus provides several annotations to facilitate the declaration of table information. Annotations: https://baomidou.com/reference/annotation/ Key annotations: @TableName, @TableId, @TableField

Reading

Mapping between properties and column names:

<resultMap id="uniqueIdentifier" type="mappedType">
    <id column="tableColumnName" property="entityPropertyName"></id> 
    <result column="tableColumnName" property="entityPropertyName"></result>
[//]: # (    id is for primary key mapping, result is for non-primary key mapping)
</resultMap>