在彈簧上設計不同的-2DAO或單個DAO

Question

我想要設計DAO接口我有dept_id的department表，帶有dept_id和employee_id的employee表，帶有employee_id的項目表和帶有employee_id的報表。現在的要求是，我想在spring做這件事情，所以我很困惑，我應該爲每個表或一個包含所有表的所有實現邏輯的通用DAO做不同的DAO，如果它的通用我應該給我什麼方法，請幫助我在界面設計

我必須做出EmployeeDAO接口，但我必須做出項目和報告和部門表中的所有鬆耦合我有EmployeeDAO做IM在這裏展示我的EmployeeDAO接口

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 
    */ 

} 

Answer 1

請勿使一個操作所有表的DAO。期。

好的，還有一句話。如果您正在增強您的系統並添加越來越多的表格，您應該如何維護。你的超一體化DAO將會很大。