即使使用限定符，两个具有相同类名（不同包）的 Spring Service Bean 也会抛出错误

Question

我有以下...

package package1;

@Service
@Qualifier("kb")
public class UserService {
...
}

package package2;

@Service
@Qualifier("user")
public class UserService {
...
}

@Autowired
@Qualifier("user")
package2.UserService p2;
@Autowired
@Qualifier("kb")
package1.UserService p1;

但是当我尝试运行它时，我得到...

org.springframework.beans.factory.BeanDefinitionStoreException：无法解析配置类[boot.Application]；嵌套异常是 org.springframework.context.annotation.ConflictingBeanDefinitionException：bean 类 [package1.UserService] 的注释指定的 bean 名称“userService”与相同名称和类 [package2.UserService] 的现有不兼容 bean 定义冲突

我如何拥有 2 个同名的服务？

Answer 1

从类中删除@Qualifier，仅在自动装配时使用@Qualifier

@Service("kb")
public class UserService {
...
}

package package2;

@Service("user")
public class UserService {
...
}

来自@Qualifier javadoc

**
 * This annotation may be used on a field or parameter as a qualifier for
 * candidate beans when autowiring. It may also be used to annotate other
 * custom annotations that can then in turn be used as qualifiers.
 */