spring的ServletRequestAttributes创建request()得到空指针

在使用spring的ServletRequestAttributes创建request()得到空指针

代码如下：

// 获取request

HttpServletRequest request = ((ServletRequestAttributes) RequestContextHolder.getRequestAttributes()).getRequest();

web.xml中也有监听的配置：

<listener>

<listener-class> org.springframework.web.context.request.RequestContextListener</listener-class>

</listener>

经过高人的指导发现spring的DBCP配置有问题

<!-- DBCP数据源 -->

<bean id="dbcpDataSource" class="org.apache.commons.dbcp.BasicDataSource">

<property name="driverClassName">

<value>${ds.dbcp.driverClassName}</value>

</property>

<property name="url">

<!-- for Oracle/MySQL -->

<value>${ds.dbcp.url}?useUnicode=true&characterEncoding=UTF-8</value>

<!-- -->

<!-- <value>${ds.dbcp.url}</value> -->

</property>

修改后完全没有问题：

<!-- DBCP数据源 -->

<bean id="dbcpDataSource" class="org.apache.commons.dbcp.BasicDataSource">

<property name="driverClassName">

<value>${ds.dbcp.driverClassName}</value>

</property>

<property name="url">

<!-- for Oracle/MySQL -->

<!-- <value>${ds.dbcp.url}?useUnicode=true&characterEncoding=UTF-8</value> -->

<!-- -->

<value>${ds.dbcp.url}</value>

</property>

<property name="username">

<value>${ds.dbcp.username}</value>

</property>