JarCasting1、use the left and right tree structure
create an Entity extends BaseTree
public class Tree extends BaseTree {
private String name;
……
}
use the tree plug-in
@Bean
public LRTreeInterceptor treeInterceptor(){
logger.info("Initialize the left and right tree structure mybatis plug-in");
return new LRTreeInterceptor();
}
The TreeMapper.java is probably like this.
insert method, This plug-in intercepts the Entity extends of BaseTree. delete method, This plug-in intercepts the @LRTreeDelete.
@Mapper
public interface TreeMapper {
int insert(Tree record);
int updateById(Tree record);
Tree findById(Long id);
List<Tree> findByPid(Long pid);
List<Tree> findByLftAndRgt(@Param("lft") Integer lft, @Param("rgt") Integer rgt);
@LRTreeDelete
int deleteById(Long id);
}