先说结论：
1、XML配置和注解生成默认BeanName的机制是不同的
2、XML配置默认BeanName = 全类名 + # + 数字，如 com.anyway.p2024.service.impl.BigHouseServiceImpl#0
3、注解默认BeanName = 短类名首字母变成小写，如 bigHouseServiceImpl
	**注意：如果短类名前2个字母都是大写，则保持短类名不变，比如 ALibaba**

## 示例

com.anyway.p2024.service.BigHouseService
```java
public interface BigHouseService {  
}
```
com.anyway.p2024.service.impl.BigHouseServiceImpl
```java
@Service  
public class BigHouseServiceImpl implements BigHouseService {  
}
```
com.anyway.p2024.service.impl.BigHouseServiceImpl2
```java
@Service  
public class BigHouseServiceImpl2 implements BigHouseService {  
}
```
com.anyway.p2024.domain.ALibaba
```java
@Component  
public class ALibaba {  
}
```
applicationContext.xml
```xml
<context:annotation-config />  
<context:component-scan base-package="com.anyway" />  
  
<bean class="com.anyway.p2024.service.impl.BigHouseServiceImpl" />  
<bean class="com.anyway.p2024.domain.ALibaba" />  
<bean class="com.anyway.p2024.domain.ALibaba" />
```
Demo04.java
```java
ApplicationContext ac = new ClassPathXmlApplicationContext("classpath:applicationContext.xml");  
System.out.println(JSON.toJSON(BeanFactoryUtils.beanNamesForTypeIncludingAncestors(ac, BigHouseService.class)));  
System.out.println(JSON.toJSON(BeanFactoryUtils.beanNamesForTypeIncludingAncestors(ac, ALibaba.class)));
```
输出如下：
```
["bigHouseServiceImpl","bigHouseServiceImpl2","com.anyway.p2024.service.impl.BigHouseServiceImpl#0"]
["ALibaba","com.anyway.p2024.domain.ALibaba#0","com.anyway.p2024.domain.ALibaba#1"]
```

思考题：
如果将 com.anyway.p2024.domain.ALibaba 复制到  com.anyway.p2024.service.ALibaba ，执行 Demo04.java 会输出什么？