我想设计 DAO 界面，我有带有 dept_id 的部门表，带有 dept_id 和employee_id 的员工表，带有employee_id 的项目表和带有employee_id 的报告表。现在的要求是我想做这件事，spring所以我很困惑，我应该为每个表或一个包含所有表的所有实现逻辑的通用 DAO 制作不同的 DAO，如果它是通用的，我应该给出什么方法请帮助我设计界面
我已经制作了 EmployeeDAO 界面，但我必须制作项目、报告和部门表都是松散耦合的我已经完成了 EmployeeDAO 我在这里显示了我的 EmployeeDAO 界面
package com.ankur.tutorial.dao;
import java.util.List;
import com.ankur.tutorial.employee.model.Employee;
/**
* The employee DAO is the main Data Access Object that will allow to retrieve
* and update the employee objects from and to the database. The retrieve and
* update is done in a manner that employee, the projects and reporting
* associated are updated
*
*
*/
public interface EmployeeDAO {
/**
* @throws EmployeeDAOException
*
* Returns all the employees from the database along with
* projects and reportigns.
*
* @return List of all employees.
* @throws
*/
List<Employee> getAllEmployees();
/**
* Search for an employee by name. The name will match either the first name
* or the last name. The matching is done using the SQL expression LIKE
* %name%
*
* @param name
* The name to search for
* @return The list of employees with matching name.
* @throws EmployeeDAOException
*/
List<Employee> findEmployees(String name);
/**
* Select employee by ID.
*
* @param id
* The ID (Number) of the employee
* @return The employee with employee number matching the id
* @throws EmployeeDAOException
*/
Employee getEmployee(long id);
/**
* Update the employee and the associated project and reporting to the
* database.
*
* @param employee
* The employee to update
* @return true if the employee record is updated
* @throws EmployeeDAOException
*/
boolean updateEmployee(Employee employee);
/**
* Delete the employee and the associated projects and reportings.
*
* @param employee
* The employee to be deleted.
* @return true if the employee record is deleted
* @throws EmployeeDAOException
*/
boolean deleteEmployee(Employee employee);
/**
* Create employee, project and reporting records in the database.
*
* @param The
* employee to be created
* @return true if the creation is successful
* @throws EmployeeDAOException
*/
}