NoUniqueBeanDefinitionException: No qualifying bean of type

启动项目报错:

Caused by: org.springframework.beans.factory.NoUniqueBeanDefinitionException: No qualifying bean of type "省略......"

排查项目
1.实现类有添加注解

@Service
public class MainXXXServiceImpl{}

2.application.xml有添加bean配置

<bean id="MainXXXServiceImpl" class="com.xxx.service.impl.MainXXXServiceImpl" />

3.调用实现类的地方有引入

	@Autowired
	MainXXXServiceImpl mainXXXServiceImpl;

启动项目后,抛异常

Caused by: org.springframework.beans.factory.NoUniqueBeanDefinitionException: No qualifying bean of type '.......................'
available: expected single matching bean but found 2: MainXXXServiceImpl mainXXXServiceImpl

问题很显而易见了,bean不是唯一的,找到了两个,在在调用实现类引入的地方变量用了小写,而bean注册的地方又是大写,修改引入实现如下

	@Autowired
	MainXXXServiceImpl MainXXXServiceImpl;

运行正常,无异常信息