您可以像这样使用 cglib:
import java.lang.reflect.Array;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import net.sf.cglib.proxy.Enhancer;
import net.sf.cglib.proxy.MethodInterceptor;
import net.sf.cglib.proxy.MethodProxy;
public class AbstractFactory {
@SuppressWarnings("unchecked")
public static <A> A createDefaultImplementation(Class<A> abstractClass) {
Enhancer enhancer = new Enhancer();
enhancer.setSuperclass(abstractClass);
enhancer.setCallback(new MethodInterceptor() {
public Object intercept(Object proxy, Method method, Object[] args, MethodProxy methodProxy) throws Throwable {
if (!Modifier.isAbstract(method.getModifiers())) {
return methodProxy.invokeSuper(proxy, args);
} else {
Class type = method.getReturnType();
if (type.isPrimitive() && !void.class.equals(type)) {
return Array.get(Array.newInstance(type, 1), 0);
} else {
return null;
}
}
}
});
return (A) enhancer.create();
}
@SuppressWarnings("unchecked")
public static <A> A createDefaultImplementation(String className) throws ClassNotFoundException{
return (A) createDefaultImplementation(Class.forName(className));
}
}
This for example lets you build abstract classes with a default implementation method. But you can change the enhancer to what ever you want.