beanfactory.java

struts在线考试系统. 自己还没看

package com.lili.exam.util;

import com.lili.exam.dao.ExamDao;
import com.lili.exam.dao.ExamDaoImpl;
import com.lili.exam.service.ExamService;
import com.lili.exam.service.ExamServiceImpl;


public class BeanFactory {
	private static ExamDao examDao;
	private static ExamService examService;
	
	public static Object getBean(String beanName){
		if(beanName.equals("examDao")){
			examDao=getExamDao();
			return examDao;
		}
		if(beanName.equals("examService")){
			examService=getExamService();
			return examService;
		}
		
		return null;
	}
	private static ExamDao getExamDao(){
		if(examDao==null)
			examDao=new ExamDaoImpl();
		return examDao;
	}
	private static ExamService getExamService(){
		if(examService==null)
			examService=new ExamServiceImpl();
		return examService;
	}
	
}