我在使用autowire和DI时遇到了一些问题,希望有人能够帮助解决,因为我已经卡了几天了。
以下是代码:
@Service
public class TicketsController implements Controller {
private TicketManager ticketManager;
@Autowired
public void setTicketManager(TicketManager ticketManager) {
this.ticketManager = ticketManager;
}
...
}
@Service
public class SimpleTicketManager implements TicketManager {
private TicketsDao ticketsDao;
@Autowired
public void setTicketsDao(TicketsDao ticketsDao) {
this.ticketsDao = ticketsDao;
}
...
}
@Repository
public class JdbcTicketDao implements TicketsDao {
private DataSource dataSource;
@Autowired
public void setDataSource(DataSource dataSource) {
this.dataSource=dataSource;
this.jdbcTemplate = new JdbcTemplate(this.dataSource);
}
...
}
public final class AppContext {
ApplicationContext context = new ClassPathXmlApplicationContext("beans.xml");
BeanFactory factory = context;
TicketsController ticketsController = (TicketsController) factory.getBean("ticketsController");
}
...
}
在我的beans.xml文件中,我有如下配置:
<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClass" value="com.mysql.jdbc.Driver"/>
<property name="url" value="jdbc:mysql://localhost:3306/mytckdb"/>
<property name="username" value="user"/>
<property name="password" value="pass"/>
</bean>
<context:component-scan base-package="bp.dao" />
<context:component-scan base-package="bp.mvc" />
<context:component-scan base-package="bp.svc" />
<context:component-scan base-package="bp.view" />
这不起作用,我会得到:
Error creating bean with name 'jdbcTicketDao': Injection of autowired dependencies failed
... nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException:
No matching bean of type [javax.sql.DataSource] found for dependency.`
请问有人可以帮忙解决这个问题吗?我做错了什么?似乎自动装配在注入dataSource时出了问题。
编辑: 我在调试代码时做了一些修改,忘记在setDataSource()之前加上@Autowire,但实际上应该要有这个注解。
@Autowire
,但所显示的代码表明情况并非如此。您能否澄清一下? - user180100beans.xml
没有被Spring视为应用上下文。 如果你能提供更多的关于如何“启动”Spring的细节 - user180100