如何使用spring-jdbc模板和spring-transaction在两个模块之间共享DAO类？

<!-- 配置数据源 -->
<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
    <property name="driverClassName" value="com.mysql.jdbc.Driver" />
    <property name="url" value="jdbc:mysql://localhost:3306/mydb" />
    <property name="username" value="root" />
    <property name="password" value="password" />
</bean>

<!-- 配置spring-jdbc模板 -->
<bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
    <property name="dataSource" ref="dataSource" />
</bean>

<!-- 配置事务管理器 -->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
    <property name="dataSource" ref="dataSource" />
</bean>

<!-- 开启注解驱动事务管理 -->
<tx:annotation-driven transaction-manager="transactionManager" />

@Repository
public class UserDao {
    @Autowired
    private JdbcTemplate jdbcTemplate;

    public void save(User user) {
        String sql = "INSERT INTO user (id, name) VALUES (?, ?)";
        jdbcTemplate.update(sql, user.getId(), user.getName());
    }
}

@Service
public class UserService {
    @Autowired
    private UserDao userDao;

    @Transactional
    public void saveUser(User user) {
        userDao.save(user);
    }
}