46 lines
1.0 KiB
Java
46 lines
1.0 KiB
Java
package dao;
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import dao.impl.StudentDAOImpl;
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import dao.impl.TeacherDAOImpl;
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import dao.impl.LeaveRequestDAOImpl;
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/**
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* DAO工厂类，用于获取各种DAO的实例
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*/
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public class DAOFactory {
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private static final StudentDAO studentDAO = new StudentDAOImpl();
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private static final TeacherDAO teacherDAO = new TeacherDAOImpl();
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private static final LeaveRequestDAO leaveRequestDAO = new LeaveRequestDAOImpl();
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/**
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* 私有构造函数，防止实例化
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*/
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private DAOFactory() {
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// 私有构造函数，阻止实例化
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}
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/**
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* 获取StudentDAO实例
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* @return StudentDAO实例
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*/
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public static StudentDAO getStudentDAO() {
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return studentDAO;
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}
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/**
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* 获取TeacherDAO实例
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* @return TeacherDAO实例
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*/
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public static TeacherDAO getTeacherDAO() {
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return teacherDAO;
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}
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/**
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* 获取LeaveRequestDAO实例
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* @return LeaveRequestDAO实例
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*/
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public static LeaveRequestDAO getLeaveRequestDAO() {
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return leaveRequestDAO;
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}
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}
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