ssm项目结合druid配置问题，项目启动一直提示连接被拒绝

Question

配置代码：

springContent.xml

<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource" init-method="init" destroy-method="close">
    <property name="driverClassName" value="${db.driverClassName}" />
    <property name="url" value="${db.url}" />
    <property name="username" value="${db.username}" />
    <property name="password" value="${db.password}" />
    <property name="initialSize" value="3" />
    <property name="minIdle" value="3" />
    <property name="maxActive" value="20" />
    <property name="maxWait" value="60000" />
    <property name="filters" value="stat,wall" />
</bean>
<bean id="stat-filter" class="com.alibaba.druid.filter.stat.StatFilter">
    <property name="slowSqlMillis" value="3000" />
    <property name="logSlowSql" value="true" />
    <property name="mergeSql" value="true" />
</bean>
<bean id="wall-filter" class="com.alibaba.druid.wall.WallFilter">
    <property name="dbType" value="mysql" />
</bean>

web.xml

<servlet>
  <servlet-name>DruidStatServlet</servlet-name>
  <servlet-class>com.alibaba.druid.support.http.StatViewServlet</servlet-class>
  <init-param>
    <param-name>loginUsername</param-name>
    <param-value>druid</param-value>
  </init-param>
  <init-param>
    <param-name>loginPassword</param-name>
    <param-value>druid</param-value>
  </init-param>
</servlet>
<servlet-mapping>
  <servlet-name>DruidStatServlet</servlet-name>
  <url-pattern>/sys/druid/*</url-pattern>
</servlet-mapping>
<filter>
  <filter-name>DruidWebStatFilter</filter-name>
  <filter-class>com.alibaba.druid.support.http.WebStatFilter</filter-class>
  <init-param>
    <param-name>exclusions</param-name>
    <param-value>*.js,*.css,*.jpg,*.png,*.ico,*.gif,/sys/druid/*</param-value>
  </init-param>
</filter>
<filter-mapping>
  <filter-name>DruidWebStatFilter</filter-name>
  <url-pattern>/*</url-pattern>
</filter-mapping>

数据库用户名和密码以及url都没有问题，但是项目启动一直报错，报错信息如下：