动态代理比起静态代理方便的多，但是jdk动态代理实现必须通过接口，如果要代理一个没有接口的类jdk动态就无法实现了，这个时候就要借助CGlib这个类库来动态生成代理类(spring hibernate框架都使用了该类库，使用前要先导入)
package proxy;
import net.sf.cglib.proxy.Enhancer;
import net.sf.cglib.proxy.MethodInterceptor;
import net.sf.cglib.proxy.MethodProxy;
import java.lang.reflect.Method;
public class CGlibProxy implements MethodInterceptor {
public <T> T getProxy(Class<T> tClass) {
return (T) Enhancer.create(tClass, this);
}
@Override
public Object intercept(Object object, Method method, Object[] args, MethodProxy proxy) throws Throwable {
before();
Object result = proxy.invokeSuper(object, args);
after();
return result;
}
public void before() {
System.out.println("before");
}
public void after() {
System.out.println("after");
}
public static void main(String[] args) {
CGlibProxy cGlibProxy = new CGlibProxy();
Hello helloProxy = cGlibProxy.getProxy(Hello.class);
helloProxy.sayHello("world");
}
}
关于Hello类:
package proxy;
public class Hello {
public void sayHello(String name) {
System.out.println("hello " + name);
}
}
