jdk动态代理：ClassCastException: com.sun.proxy.$Proxy4 cannot be cast to com.cx.bank.dao.BankDaoImpl

java.lang.ClassCastException: com.sun.proxy.$Proxy4 cannot be cast to com.cx.bank.dao.BankDaoImpl
  at com.cx.bank.factory.UserDaoFactory.getBankDao(UserDaoFactory.java:57)
  at com.qijian.cx.bank.manager.TestManager.<clinit>(TestManager.java:17)
  at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
  at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
  at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
  at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
  at org.junit.runners.BlockJUnit4ClassRunner.createTest(BlockJUnit4ClassRunner.java:250)
  at org.junit.runners.BlockJUnit4ClassRunner.createTest(BlockJUnit4ClassRunner.java:260)
  at org.junit.runners.BlockJUnit4ClassRunner$2.runReflectiveCall(BlockJUnit4ClassRunner.java:309)
  at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
  at org.junit.runners.BlockJUnit4ClassRunner.methodBlock(BlockJUnit4ClassRunner.java:306)
  at org.junit.runners.BlockJUnit4ClassRunner$1.evaluate(BlockJUnit4ClassRunner.java:100)
  at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:366)
  at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:103)
  at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:63)
  at org.junit.runners.ParentRunner$4.run(ParentRunner.java:331)
  at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:79)
  at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:329)
  at org.junit.runners.ParentRunner.access$100(ParentRunner.java:66)
  at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:293)
  at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)
  at org.junit.runners.ParentRunner.run(ParentRunner.java:413)
  at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
  at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:69)
  at com.intellij.rt.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:33)
  at com.intellij.rt.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:221)
  at com.intellij.rt.junit.JUnitStarter.main(JUnitStarter.java:54)
java.lang.ClassCastException: com.sun.proxy.$Proxy4 cannot be cast to com.cx.bank.dao.BankDaoImpl

public static Object newProxyInstance(ClassLoader loader,
                                      Class<?>[] interfaces,
                                      InvocationHandler h)

BankDaoInterface bankDao1 = (BankDaoInterface) Proxy.newProxyInstance(
        MyBeanFactory.class.getClassLoader(),
        new Class[]{BankDaoInterface.class}, new InvocationHandler() {
            public Object invoke(Object proxy, Method method,
                                 Object[] args) throws Throwable {
                myAspect.myBefore(); // 前增强
                Object obj = method.invoke(bankDao, args);
                myAspect.myAfter(); // 后增强
                return obj;
            }
        });
return bankDao1;