SSM整合小專案關閉時tomcat報錯：
The web application [] appears to have started a thread named [Abandoned connection cleanup thread] but has failed to stop it. This is very likely to create a memory leak
 
原因似乎是資料庫的驅動無法釋放。
解決方法：

• pom.xml中的mysql驅動依賴去掉。
• 將mysql驅動包新增到tomcat安裝目錄下的lib資料夾中。
• 自定義監聽器：

public class DriverMangerListener implements ServletContextListener {

    @Override
    public void contextInitialized(ServletContextEvent sce) {

    }

    public void contextDestroyed(ServletContextEvent sce) {
        Enumeration<Driver> enumeration = DriverManager.getDrivers();
        while (enumeration.hasMoreElements()) {
            try {
                DriverManager.deregisterDriver(enumeration.nextElement());
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
    }
}
 

• 將該監聽器在web.xml中配置：

<listener>
      <listener-class>com.ssm.listener.DriverMangerListener</listener-class>
</listener>

• ok。