SpringMVC控制层private方法中出现注入的service对象空指针异常

public boolean evaluate(Object arg) {
   Member member = (Member)arg;
   int mod = member.getModifiers();
   if (Modifier.isPrivate(mod)) {
       return false;
   } else if (Modifier.isPublic(mod)) {
       return true;
   } else if (Modifier.isProtected(mod) && this.protectedOk) {
       return true;
   } else {
       return this.samePackageOk && this.pkg.equals(TypeUtils.getPackageName(Type.getType(member.getDeclaringClass())));
   }
}

private static class DynamicAdvisedInterceptor implements MethodInterceptor, Serializable {
   @Override
   @Nullable
   public Object intercept(Object proxy, Method method, Object[] args, MethodProxy methodProxy) throws Throwable {
       // 省略...
       target = targetSource.getTarget();
       Class<?> targetClass = (target != null ? target.getClass() : null);
       List<Object> chain = this.advised.getInterceptorsAndDynamicInterceptionAdvice(method, targetClass);
       Object retVal;
       // Check whether we only have one InvokerInterceptor: that is,
       // no real advice, but just reflective invocation of the target.
       if (chain.isEmpty() && CglibMethodInvocation.isMethodProxyCompatible(method)) {
          // We can skip creating a MethodInvocation: just invoke the target directly.
          // Note that the final invoker must be an InvokerInterceptor, so we know
          // it does nothing but a reflective operation on the target, and no hot
          // swapping or fancy proxying.
          Object[] argsToUse = AopProxyUtils.adaptArgumentsIfNecessary(method, args);
          retVal = invokeMethod(target, method, argsToUse, methodProxy);
       }
       else {
          // We need to create a method invocation...
          retVal = new CglibMethodInvocation(proxy, target, method, args, targetClass, chain, methodProxy).proceed();
       }
       retVal = processReturnType(proxy, target, method, retVal);
       return retVal;
       // 省略...
   }
}
static boolean isMethodProxyCompatible(Method method) {
   return (Modifier.isPublic(method.getModifiers()) &&
           method.getDeclaringClass() != Object.class && !AopUtils.isEqualsMethod(method) &&
           !AopUtils.isHashCodeMethod(method) && !AopUtils.isToStringMethod(method));
}