关于spring mvc3, mysql, setDataSource, AutoWired

http://static.springsource.org/spring/docs/current/spring-framework-reference/html/jdbc.html

以上是官方教程,讲得非常详细,两种方法。

但是,有一点没讲,使用这种办法,必须要保证这个类在 bean的管理之下,就是说,写在controller里面,然后实例也标记autowired。

你自己定义实例是没用的,不属于bean管理的范畴,所以autowired 的 setDataSource方法不会被调用!

最后,我的办法是,获得dataSource

ApplicationContext ac = WebApplicationContextUtils.getWebApplicationContext(InitServletContext.getServletContext());
        DataSource dataSource = (DataSource) ac.getBean("dataSource");
        this.jdbcTemplate = new JdbcTemplate(dataSource); 

http://stackoverflow.com/questions/12862203/autowired-and-service-working-from-controller-but-not-from-a-different-package

@Component
public class InitServletContext implements ServletContextAware{

    static ServletContext ServletContext;

    @Override
    public void setServletContext(ServletContext servletContext) {
        ServletContext = servletContext;
        
    }

    public static ServletContext getServletContext() {
        return ServletContext;
    }

}
    <beans:bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
    <!-- 连接MySQL-->
        <beans:property name="driverClassName" value="com.mysql.jdbc.Driver"></beans:property>
        <beans:property name="url" value="jdbc:mysql://localhost:3306/piano_db"></beans:property>
        <beans:property name="username" value="root"></beans:property>
        <beans:property name="password" value="root"></beans:property>
    </beans:bean>
原文地址:https://www.cnblogs.com/Sorean/p/3023300.html