j2ee 设计模式

一个接口：

public interface BusinessService {

	public void doProcesing();
}

2.2个实现类的方法

public class EJBService implements BusinessService {

	@Override
	public void doProcesing() {
		// TODO Auto-generated method stub
     System.out.println("Processing task by invoking EJB Service");
	}

}

public class JMSService  implements BusinessService {

	@Override
	public void doProcesing() {
		// TODO Auto-generated method stub
	System.out.println("Processing taks by invoking  JMS Serveiec");	
	}
	

}

2.3 搜索类方法：

public class BusinesssLookUp {

	public BusinessService getBussinessSrcei(String seriveType) {
		 if(seriveType.equals("EJB")) {
			  return new EJBService();
		 }else {
			   return  new JMSService();
		 }
		
		
	
		
	}
}

2.4 客户端委托方法

public class BusinessDelate {

	private  BusinesssLookUp lookUp=new BusinesssLookUp();
	private BusinessService businessService;
	private String serviceType;
	
	
	public void setServiceType(String serviceType) {
		  this.serviceType=serviceType;
	}
	
	
	
	
	public void doTask() {
		 businessService=lookUp.getBussinessSrcei(serviceType);
		 businessService.doProcesing();
	}
}

2.5 客户端调用方法：

public class Businessdeletefate {

	
	public static void main(String[] args) {
		
	
		BusinessDelate  bussi=new BusinessDelate();
		bussi.setServiceType("EJB");
		
		Client client=new Client(bussi);
		client.doTask();
		
		
		bussi.doTask();
	}
}

2.6 主测试方法：

public class Businessdeletefate {

	
	public static void main(String[] args) {
		
	
		BusinessDelate  bussi=new BusinessDelate();
		bussi.setServiceType("EJB");
		
		Client client=new Client(bussi);
		client.doTask();
		
		
		bussi.doTask();
	}
}

1。参考资料