Spring-如何自动连接数据源? [英] spring - how to autowire data source?

问题描述

一般来说，我在使用自动接线和DI时遇到问题，所以我希望有人可以帮助我，因为我已经被困了好几天了.

I'm having some problem with autowire and DI in general, so I hope that someone can help cause I've been stuck for days now.

这是代码:

@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中，我得到了:

In my beans.xml I've got:

<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.` 

有人可以帮忙吗?我究竟做错了什么?似乎自动装配可以一直工作到下一个步骤，该步骤在注入dataSource时失败.

Can someone please help out with this? What am I doing wrong? It seems that autowiring is working all until the next step where it fails when injecting dataSource.

编辑:我在玩代码，在setDataSource()之前忘记了@Autowire，但应该在那儿了.

EDIT: I was playing with the code, and forgot @Autowire before setDataSource() but it is supposed to be there.

推荐答案

也许您缺少接线配置，请尝试

Maybe you're missing wiring configuration, try

<context:annotation-config/>

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