初試 cglib

public class Man {

	public String say() {
        System.out.println("cglib hello~~~");
        return "return cglib hello";
	} 

}

 

 

import java.lang.reflect.Method;

import net.sf.cglib.proxy.CallbackFilter;
import net.sf.cglib.proxy.Enhancer;
import net.sf.cglib.proxy.MethodInterceptor;
import net.sf.cglib.proxy.MethodProxy;

public class AOPInstrumenter implements MethodInterceptor,CallbackFilter  {
	private Enhancer enhancer = new Enhancer();
	private Object sub;
	
	public AOPInstrumenter(Object obj) {
		super();
		this.sub = obj;
	}

	public Object getInstrumentedClass(Class clz) {
		
		enhancer.setSuperclass(clz);
		//設置callback是this
		enhancer.setCallback(this);
		//添加 方法过滤器  返回1为不运行 0 为运行
		enhancer.setCallbackFilter(this);
		return enhancer.create();
	}

	public Object intercept(Object o, Method method, Object[] arg,
			MethodProxy proxy) throws Throwable {
		System.out.println("cglib 111111");
		Object obj = proxy.invoke(sub, arg);
		System.out.println("cglib 222222");
		return obj;
	}

	public int accept(Method method) {
		 System.out.println("accept........."+method.getName());
		return 0;
	}
}

 

 

 

 

public class AOPTest {
	public static void main(String[] args) {
		Man man = new Man();
		AOPInstrumenter instrumenter = new AOPInstrumenter(man);
		Man man1 = (Man) instrumenter.getInstrumentedClass(Man.class);
		man1.say();
	}
}

 

 

  運行結果：

accept.........say
accept.........hashCode
accept.........finalize
accept.........clone
accept.........equals
accept.........toString
cglib 111111
cglib hello~~~
cglib 222222

 

 

 

-------------------------------------------

稍作修改：

import java.lang.reflect.Method;

import net.sf.cglib.proxy.CallbackFilter;
import net.sf.cglib.proxy.Enhancer;
import net.sf.cglib.proxy.MethodInterceptor;
import net.sf.cglib.proxy.MethodProxy;

public class AOPInstrumenter implements CallbackFilter  {
	

	public Object getInstrumentedClass(Class clz) {
		Enhancer enhancer = new Enhancer();
		//设置需要代理的类
		enhancer.setSuperclass(clz);
		//設置callback是this
		enhancer.setCallback(new ManMethodInterceptor());
		//添加 方法过滤器  返回1为不运行 0 为运行
		enhancer.setCallbackFilter(this);
		//创建一个代理
		return enhancer.create();
	}

	

	public int accept(Method method) {
		 System.out.println("accept........."+method.getName());
		return 0;
	}
}

 

import java.lang.reflect.Method;

import net.sf.cglib.proxy.MethodInterceptor;
import net.sf.cglib.proxy.MethodProxy;

public class ManMethodInterceptor implements MethodInterceptor{
	public Object intercept(Object o, Method method, Object[] arg,
			MethodProxy proxy) throws Throwable {
		System.out.println("cglib 111111 name: " + method);
		//Object obj = proxy.invoke(o, arg);
		Object obj = proxy.invokeSuper(o, arg);
		System.out.println("cglib 222222");
		return obj;
	} 

 

 

public class AOPTest {
	public static void main(String[] args) {
		AOPInstrumenter instrumenter = new AOPInstrumenter();
		Man man1 = (Man) instrumenter.getInstrumentedClass(Man.class);
		man1.say();
	}
}