在web.xml添加如下代码

<!-- 解决 org.hibernate.HibernateException: Could not obtain transaction-synchronized Session for current 出错问题 -->
<filter>
        <filter-name>SpringOpenSessionInViewFilter</filter-name>
        <filter-class>org.springframework.orm.hibernate4.support.OpenSessionInViewFilter</filter-class>
    </filter>
    <filter-mapping>
        <filter-name>SpringOpenSessionInViewFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>