package com.itheima.dao;import com.itheima.domain.Book;import org.apache.ibatis.annotations.Delete;import org.apache.ibatis.annotations.Insert;import org.apache.ibatis.annotations.Select;import org.apache.ibatis.annotations.Update;import java.util.List;public interface BookDao { // 我们采用int作为返回值，当作数据库操作的行数返回值，用来判断是否操作成功 @Insert("insert into tbl_book (type,name,description) values(#{type},#{name},#{description})") public int save(Book book); @Update("update tbl_book set type = #{type}, name = #{name}, description = #{description} where id = #{id}") public int update(Book book); @Delete("delete from tbl_book where id = #{id}") public int delete(Integer id); @Select("select * from tbl_book where id = #{id}") public Book getById(Integer id); @Select("select * from tbl_book") public List<Book> getAll();}
