beanfactory.java

本程序所写的排课

package com.briup.common;

import com.briup.dao.ICourseDao;
import com.briup.dao.IUserDao;
import com.briup.dao.impl.CourseDaoImpl;
import com.briup.dao.impl.UserDaoImpl;
import com.briup.service.ICourseService;
import com.briup.service.IUserService;
import com.briup.service.impl.CourseServiceImpl;
import com.briup.service.impl.UserServiceImpl;

public class BeanFactory {

	private static IUserDao userDao;
	private static IUserService userService;
	private static ICourseDao courseDao;
	private static ICourseService courseService;
	
	public static final String USERDAOIMPL = "userdaoimpl";
	public static final String USERSERVICEIMPL = "userServiceimpl";
	public static final String COURSEDAOIMPL = "COURSEDAOimpl";
	public static final String COURSESERVICEIMPL = "courseServiceimpl";
	
	public static Object getBean(String name)
	{
		if(name.equals(USERDAOIMPL))
		{
			return getUserDaoImpl();
		}
		else if(name.equals(USERSERVICEIMPL))
		{
			return getUserServiceImpl();
		}
		else if(name.equals(COURSEDAOIMPL))
		{
			return getCourseDaoImpl();
		}
		else if(name.equals(COURSESERVICEIMPL))
		{
			return getCourseServiceImpl();
		}
		else
		{
			return null;
		}
	}
	
	public synchronized static IUserDao getUserDaoImpl()
	{
		if(userDao == null)
			userDao = new UserDaoImpl();
		return userDao;
	}
	public synchronized static IUserService getUserServiceImpl()
	{
		if(userService == null)
			userService = new UserServiceImpl();
		System.out.println("getUserServiceImpl()");
		return userService;
	}
	public synchronized static ICourseDao getCourseDaoImpl()
	{
		if(courseDao == null)
			courseDao = new CourseDaoImpl();
		return courseDao;
	}
	public synchronized static ICourseService getCourseServiceImpl()
	{
		if(courseService == null)
			courseService = new CourseServiceImpl();
		return courseService;
	}
}