SSM框架下mock不生效

```
@RunWith(SpringJUnit4ClassRunner.class)
@SpringBootTest(classes = XXX.class)
public class DemoTest {
@Autowired
ServiceA serviceA;
public static class Mock{
@MockInvoke(targetClass = JsonUtil.class)
private String toJson(AAo aAo){
return "123";
}
@MockInvoke(targetClass = ServiceB.class)
private String methodB(AAo aAo){
return "123";
}
}

@Test
public void test(){
AAo aAo= new AAo();
serviceA.methodA(aAo);
}
}

@Controller
@RequestMapping("/")
public class ServiceA{
@Autowired
private ServiceB serviceB;

@PostMapping("/")
@Override
public void methodA(AAo aAo){
logger.info(serviceB.methodB(aAo));
logger.info( JsonUtil.toJson(aAo));
}

}
```
tojson方法并没有被覆盖，serviceB的methodB方法也没有被覆盖

Start by running the shown DemoTest with the ServiceA, ServiceB, and JsonUtil example, then trace how MockInvoke is applied under SpringJUnit4ClassRunner and SpringBootTest. Check both the static JsonUtil.toJson call and the autowired ServiceB.methodB call; done means both mocked methods return the demonstrated "123" value.

Written by the indexing model from the issue text.