1、接口类（抽象角色）
public interface IHello {
public void hello(String name);
}
2、接口实现（真实角色）public void hello(String name);
}
public class HelloImpl implements IHello {
@Override
public void hello(String name) {
System.out.println("Hello, " + name);
}
}
@Override
public void hello(String name) {
System.out.println("Hello, " + name);
}
}
3、代理类实现（代理角色）
private Object delegate;
public Object bind(Object delegate) {
this.delegate = delegate;
return Proxy.newProxyInstance(delegate.getClass().getClassLoader(),
delegate.getClass().getInterfaces(), this);
}
@Override
public Object invoke(Object proxy, Method method, Object[] args)
throws Throwable {
Object result = null;
try {
print("before call" + method);
result = method.invoke(delegate, args);
print("after call" + method);
} catch (Exception e) {
print(e.toString());
}
return result;
}
private void print(String message) {
System.out.println(message);
}
public class Demo {
public static void main(String[] args) {
HelloProxyImpl proxy = new HelloProxyImpl();
IHello helloProxy = (IHello) proxy.bind(new HelloImpl());
helloProxy.hello("Spring");
}
}
public static void main(String[] args) {
HelloProxyImpl proxy = new HelloProxyImpl();
IHello helloProxy = (IHello) proxy.bind(new HelloImpl());
helloProxy.hello("Spring");
}
}