daofactory.java

用java开发的QQ管理系统

package com.zlf.dao;

import com.zlf.dao.xml.XmlDeptDao;
import com.zlf.dao.xml.XmlUserDao;
import com.zlf.qqserver.utils.QQUtils;


public class DaoFactory {

	private static DaoFactory daoFactory ;

	private DaoFactory() {
		
	}


	public static DaoFactory newInstance() {
		
		if (daoFactory == null){
			daoFactory = new DaoFactory();
		}
		return daoFactory;
	}

	/**
	 * 
	 * @return DeptDao
	 * 部门工厂
	 */
	public DeptDao createDeptDao() {

		String type = QQUtils.properties.getProperty("StoredDirection");

		if (type.equalsIgnoreCase("XML")) {
			return new XmlDeptDao();
		} else if (type.equalsIgnoreCase("oracle")) {
			return (DeptDao) new DeptDaoOracleImp();
		} else {
			return (DeptDao) new XmlDeptDao();
		}
	}


	public UserDao createUserDao() {

		String type = QQUtils.properties.getProperty("StoredDirection");

		if (type.equalsIgnoreCase("xml"))
			return (UserDao) new XmlUserDao();
		else if (type.equalsIgnoreCase("oracle"))
			return (UserDao) new UserDaoOracleImp();
		else
			return (UserDao) new XmlUserDao();
	}
	
	/**
	 * 
	 * 指定方式
	 * 特殊情况return xmldeptdao
	 * @param s
	 * @return DeptDao
	 * 
	 */
	public DeptDao createDeptDao(String s) {


		if (s.equalsIgnoreCase("XML")) {
			return new XmlDeptDao();
		} else if (s.equalsIgnoreCase("oracle")) {
			return (DeptDao) new DeptDaoOracleImp();
		} else {
			return (DeptDao) new XmlDeptDao();
		}
	}


	public UserDao createUserDao(String s) {


		if (s.equalsIgnoreCase("xml"))
			return (UserDao) new XmlUserDao();
		else if (s.equalsIgnoreCase("oracle"))
			return (UserDao) new UserDaoOracleImp();
		else
			return (UserDao) new XmlUserDao();
	}

}