如何将服务自动装配为构造函数参数？

Question

我有以下服务：

public interface LogoutService {
    void logoutAllUsers();

    void dropUserSession(SessionInformation session);
}

及以下实施：

@Service
public class LogoutServiceImpl implements LogoutService {
    ...

public class MyXmlBean extends ConcurrentSessionControlAuthenticationStrategy {
    ....

       public MyXmlBean (MySessionRegistry sessionRegistry,
                                                              LogoutService logoutService) {
             ....

和以下 xml 配置：

<bean id="MyXmlBean" class="package.MyXmlBean">
    <constructor-arg name="sessionRegistry" ref="mySessionRegistry" />
    <constructor-arg name="logoutService" ref="logoutService"/>
    <property name="maximumSessions" value="1" />
</bean>

当我启动应用程序时 - 我看到以下错误：

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'myXmlBean ' defined in class path resource [context-security.xml]: Cannot resolve reference to bean 'myXmlBean ' while setting constructor argument with key [1]; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'MyXmlBean' defined in class path resource [context-security.xml]: Cannot resolve reference to bean 'logoutService' while setting constructor argument; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No bean named 'logoutService' is defined

如何解决？

Answer 1

据我所知

@Service 注释是从错误的包中导入的（非 spring）

如何将服务自动装配为构造函数参数？

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dependency-injection

constructor-injection