DAO
...\DAOFactory.java
...\DatabaseConnection.java
...\Emp.java
...\EmpDAOImpl.java
...\EmpDAOProxy.java
...\employ
...\......\dao
...\......\...\IEmpDAO.class
...\......\...\impl
...\......\...\....\EmpDAOImpl.class
...\......\...\proxy
...\......\...\.....\EmpDAOProxy.class
...\......\dbc
...\......\...\DatabaseConnection.class
...\......\factory
...\......\.......\DAOFactory.class
...\......\vo
...\......\..\Emp.class
...\IEmpDAO.java
...\insert.jsp
...\insert_do.jsp
...\select.jsp
...\数据库emp.txt