版权声明:转载请注明来源 https://blog.csdn.net/genghaihua/article/details/89386633
import net.sf.cglib.proxy.Enhancer;
import net.sf.cglib.proxy.MethodInterceptor;
import net.sf.cglib.proxy.MethodProxy;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;
import java.util.Arrays;
interface Hello {
String sayHello(String str);
}
// 实现
class HelloImp implements Hello {
@Override
public String sayHello(String str) {
return "HelloImp: " + str;
}
}
class LogInvocationHandler implements InvocationHandler {
private Object target;
public Object getProxyInstance(Object target) {
this.target = target;
return Proxy.newProxyInstance(target.getClass().getClassLoader(),
target.getClass().getInterfaces(), this);
}
@Override
public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
if ("sayHello".equals(method.getName())) {
System.out.println("You said: " + Arrays.toString(args));
}
return method.invoke(target, args);
}
}
class CglibProxy implements MethodInterceptor {
private Object target;
public Object getProxyInstance(Object target) {
this.target = target;
Enhancer enhancer = new Enhancer();
enhancer.setSuperclass(this.target.getClass());
enhancer.setCallback(this); // call back method
return enhancer.create(); // create proxy instance
}
@Override
public Object intercept(Object target, Method method, Object[] args, MethodProxy methodProxy) throws Throwable {
System.out.println("before target method...");
Object result = methodProxy.invokeSuper(target, args);
System.out.println("after target method...");
return result;
}
}
public class Test1 {
public static void main(String[] args) {
CglibProxy proxy = new CglibProxy();
Hello hello = (Hello) proxy.getProxyInstance(new HelloImp());
System.out.println(hello.sayHello("Leon"));
}
}
pom
<dependency>
<groupId>cglib</groupId>
<artifactId>cglib</artifactId>
<version>3.1</version>
</dependency>