设计模式记录学习---后续

1、动态代理

了解java反射，获取类类三种方式Class.forName()、类名.class、类实例.getClass()

获取实例方法：无参2种、有参一种

类类.newInstance()

类类.getConstructor(Class[]{}).newInstance(Object[]{}); 

类类.getMethod(MethodName, Class[]{}).invoke(具体实例对象, Object[]{}); 

public class DynamicProxy implements InvocationHandler{
	private Object targetObject;
	public DynamicProxy(Object object)
	{
		this.targetObject=object;
	}
	 public Object newProxyInstance(DynamicProxy dynamicProxy) {  
	        return Proxy.newProxyInstance(targetObject.getClass().getClassLoader(),  
	                               targetObject.getClass().getInterfaces(), this);  
	    }
	@Override
	public Object invoke(Object proxy, Method method, Object[] args)
			throws Throwable {
		// TODO Auto-generated method stub
		System.out.println("before");
		Object ret =method.invoke(targetObject, args);
		if(args!=null){
			for(int i=0;i

2.装饰模式

抽象构件角色（Component）：给出一个接口，以规范准备接收附加责任的对象
具体构件角色（ConcreteComponent）：定义一个将要接收附加责任的类
装饰角色（Decorato）：持有一个构件对象的实例，并定义一个与抽象构件接口一致的接口
具体装饰角色（ConcreteDecoratoA、ConcreteDecoratoB）：负责给构件对象“贴上”附加的责任

public interface Component {
	
        public void doSomeThing();
}

public class ConcreteComponent implements Component {
	
	@Override
	public void doSomeThing() {
		System.out.println("Component A");
	}

}

public class Decorato implements Component {
	private Component  component;
	
	public Decorato(Component  component){
		
		this.component=component;
	}

	@Override
	public void doSomeThing() {
		component.doSomeThing();
	}

}

public class ConcreteDecoratoA extends Decorato {

	public ConcreteDecoratoA(Component component) {
		super(component);
	}
	@Override
	public void doSomeThing() {
		super.doSomeThing();
		doOtherSomeThing();
	}
	public void doOtherSomeThing(){
		System.out.println("Decorat----A");
	}
}

public class ConcreteDecoratoB extends Decorato {

	public ConcreteDecoratoB(Component component) {
		super(component);
		// TODO Auto-generated constructor stub
	}
	
	@Override
	public void doSomeThing() {
		super.doSomeThing();
		doOtherSomeThing();
	}
	public void doOtherSomeThing(){
		System.out.println("Decorat----B");
	}
	
	public static void main(String args[]) throws Exception{
		Component component = new ConcreteDecoratoB(new ConcreteDecoratoA(new ConcreteComponent()));
		component.doSomeThing();
		
	}
}