覆盖bean的Spring Java配置

Question

@Repository ("someDao")
public class SomeDaoImpl implements SomeDao {

    private NamedParameterJdbcTemplate jdbcTemplate;

    @Autowired
    public void setDataSource(DataSource dataSource) {
        jdbcTemplate = new NamedParameterJdbcTemplate(dataSource);
    }
}

然后我们有这样的服务：

@Service
public class SomeServiceImpl implements
        SomeService {

    @Resource(name = "someDao")
    private SomeDao someDao;

    @Resource(name = "someDaoAnotherDataSource")
    private SomeDao someDaoAnotherDataSource;

}

我的第一个bean是由@repository注释创建的，另一个bean是在Spring配置类中声明的：

@Configuration
@ComponentScan(basePackages = "mypackages")
public abstract class ApplicationRootConfiguration {

    @Bean(name = "otherDataSource")
    public DataSource otherDataSource() throws NamingException {
    ...
    }

    @Bean(name = "someDaoAnotherDataSource")
    public SomeDao getSomeDaoAnotherDataSource(@Qualifier("otherDataSource")
     DataSource dataSource) throws NamingException {
        SomeDao dao = new SomeDaoImpl();
        dao.setDataSource(dataSource);
        return dao;
    }
}

如果我运行我的应用程序，SomeServiceImpl中的属性someDaoAnotherDataSource没有在配置类中声明我的bean，而是用注释存储库声明了bean。

<bean id="someDaoAnotherDataSource"     class="SomeDaoImpl">
    <property name="dataSource" ref="otherDataSource" />
</bean>

Answer 1

只是一个想法，不要将数据源注入到方法中，请尝试以下操作

@Bean(name = "someDaoAnotherDataSource")
public SomeDao getSomeDaoAnotherDataSource() throws NamingException {
    SomeDao dao = new SomeDaoImpl();
    dao.setDataSource(otherDataSource());
    return dao;
}

虽然两者都应该起作用。

确保@resource注释中的名称是正确的，并且不要在@bean注释中指定bean的名称，而是将方法重命名为相同的名称。

@Bean(name = "someDaoAnotherDataSource")
public SomeDao someDaoAnotherDataSource() throws NamingException {
    SomeDao dao = new SomeDaoImpl();
    dao.setDataSource(otherDataSource());
    return dao;
}

<bean id="getSomeDaoAnotherDataSource" name="someDaoAnotherDataSource"     class="SomeDaoImpl">
    <property name="dataSource" ref="otherDataSource" />
</bean>