mybatis resultmap

MyBatis ResultMap is a mapping configuration that specifies how the result of a query will be mapped to Java objects. It is used to convert the result set of a SQL query into a Java object.

A ResultMap typically contains one or more ResultMappings, which define the mapping between the columns in the result set and the properties of the Java object. Each ResultMapping specifies the column name, the Java property name, and the Java type of the property.

ResultMaps can be defined in XML or Java annotations. In XML, a ResultMap is defined using the <resultMap> element, while in Java annotations, it is defined using the @ResultMap annotation.

ResultMaps can be reused across different queries, and they can also be nested to handle more complex mappings. MyBatis provides several built-in ResultMap types, including AutoMapping, which automatically maps columns with matching property names, and ConstructorMapping, which maps the result set to a constructor of the Java object.

Overall, ResultMap is an important and flexible feature of MyBatis that allows developers to easily map SQL query results to Java objects.