businessfactory.java

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package cn.com.tarena.util;

import java.util.Properties;

import cn.com.tarena.business.IOrderBusiness;
import cn.com.tarena.business.IProductBusiness;
import cn.com.tarena.business.IUserBusiness;
import cn.com.tarena.dao.IOrderDao;
import cn.com.tarena.dao.IProductDao;
import cn.com.tarena.dao.IUserDao;

public class BusinessFactory {
	public static IProductBusiness getProductBusiness() {
		Properties pro = getProperties();
		IProductBusiness ipb = null;
		String businessImpl = pro.getProperty("ProductBusinessImpl");
		try {
			ipb = (IProductBusiness) Class.forName(businessImpl).newInstance();
		} catch (ClassNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (InstantiationException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IllegalAccessException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		return ipb;
	}

	public static IUserBusiness getUserBusiness() {
		Properties pro = getProperties();
		IUserBusiness iub = null;
		String businessImpl = pro.getProperty("UserBusinessImpl");
		try {
			iub = (IUserBusiness) Class.forName(businessImpl).newInstance();
		} catch (ClassNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (InstantiationException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IllegalAccessException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		return iub;
	}

	public static IOrderBusiness getOrderBusiness() {
		Properties pro = getProperties();
		IOrderBusiness iob = null;
		String businessImpl = pro.getProperty("OrderBusinessImpl");
		try {
			iob = (IOrderBusiness) Class.forName(businessImpl).newInstance();
		} catch (ClassNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (InstantiationException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IllegalAccessException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		return iob;
	}

	private static Properties getProperties() {
		Properties pro = new Properties();
		try {
			pro.load(Utils.class
					.getResourceAsStream("../ApplicationResources.properties"));
		} catch (Exception e) {
			System.out.println(e.getMessage());
			e.printStackTrace();
			System.exit(1);
		}
		return pro;
	}
}