抽象工厂模式

/**
 * 抽象工厂模式
 * 定义：提供一个创建一系列相关依赖对象接口 而无需指定他们具体的类
 * 例子：实现MySQL  Orcal 连接原理
 * 应用场景：程序需要处理不同系列的相关产品，但是不需要他依赖这些产品的具体类时可以使用抽象工厂
 * 优点：
 * 	1.可以确信从工厂得到的产品彼此兼容
 *  2.可以避免具体产品和客户端代码之间的耦合
 *  3，符合单一职责原责
 *  4.符合开闭原则
 *  
 * @author wangqk
 *
 */
public class AbstractFactoryTest {
	
	public static void main(String[] args) {
		mysqlDemo();
		OrcaleDemo(); 
	}
	public static void mysqlDemo() {
		IDatabasesUtils dataUtils = new MysqlDataBaseUtils();
		IConnection connection = dataUtils.getConnection();
		connection.connect();
		ICommand command = dataUtils.getCommand();
		command.command(); 
	}
	public static void OrcaleDemo() {
		IDatabasesUtils dataUtils = new OrcaleDataBaseUtils();
		IConnection connection = dataUtils.getConnection();
		connection.connect();
		ICommand command = dataUtils.getCommand();
		command.command(); 
	}
	
}

interface ICommand {
	public void command();
}

interface IConnection {	
	
	public void connect();
}

interface IDatabasesUtils {
	
	IConnection getConnection();
	
	ICommand getCommand();
} 

class MysqlConnection implements IConnection {
	@Override
	public void connect() {
		System.out.println("Mysql connect ");
	}
}

class OracleConnection  implements IConnection{
	@Override
	public void connect() {
		System.out.println("Oracle connect");
		
	}
}

class MysqlCommand implements ICommand{
	@Override
	public void command() {
		System.out.println("mysql command");
	}
}

class OracleCommand implements ICommand{

	@Override
	public void command() {
		System.out.println("Oracle command");
		
	}
}


class MysqlDataBaseUtils implements IDatabasesUtils {

	@Override
	public IConnection getConnection() {
		return new MysqlConnection();
	}
	@Override
	public ICommand getCommand() {
		return new MysqlCommand();
	}
	
}

 
class OrcaleDataBaseUtils implements IDatabasesUtils{

	@Override
	public IConnection getConnection() { 
		return new OracleConnection();
	}
	@Override
	public ICommand getCommand() {
		return new OracleCommand();
	}
	
}