java - 原生CGLib內部方法互相呼叫時可以代理，但基於CGLib的Spring AOP卻代理失效，為什麼？
下面是CGLib的原生寫法（使用net.sf.cglib.proxy.*套件內的類別實作）
class Foo {
public void fun1(){
System.out.println("fun1");
fun2();
}
public void fun2() {
System.out.println("fun2");
}
}
class CGlibProxyEnhancer implements MethodInterceptor{
public Object getProxy(Class clazz) {
Enhancer enhancer = new Enhancer();
enhancer.setSuperclass(clazz);
enhancer.setCallback(this);
return enhancer.create();
}
@Override
public Object intercept(Object obj, Method method, Object[] args, MethodProxy proxy) throws Throwable {
System.out.print("before ");
Object result = proxy.invokeSuper(obj,args);
return result;
}
}
public class Test {
public static void main(String[] args) {
CGlibProxyEnhancer pf = new CGlibProxyEnhancer();
Foo foo = (Foo) pf.getProxy(Foo.class);
foo.fun1();
}
}列印結果是：
before fun1
before fun2
可以看到，雖然fun2()是透過foo.fun1()呼叫的，但fun()2依然能被代理。
但如果用Spring AOP那套基本寫法的話：
class Foo {
public void fun1() {
System.out.println("fun1");
fun2();
}
public void fun2() {
System.out.println("fun2");
}
}
class Before implements MethodBeforeAdvice {
public void before(Method method, Object[] objects, Object o) throws Throwable {
System.out.print("before ");
}
}
public class TestCGLib {
public static void main(String[] args) {
Foo foo = new Foo();
BeforeAdvice advice = new Before();
ProxyFactory pf = new ProxyFactory();
pf.setOptimize(true);//启用Cglib2AopProxy创建代理
pf.setProxyTargetClass(true);
pf.setTarget(foo);
pf.addAdvice(advice);
Foo proxy = (Foo) pf.getProxy();
proxy.fun1();
}
}輸出結果是：
before fun1
fun2
可見fun2方法沒有被代理。
為什麼會有這樣的差異？
