quartz + spring 启动项目时，报错The web application [] appears to have started a thread named.........

　　只是想记录自己的错误信息，下次再出现就知道怎么操作，不用再查找资料

解决办法：

package com.wqq.quartz_test.schedule;

import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;

import org.springframework.web.context.WebApplicationContext;

/** 
 * @author wangqq 
 * @version 创建时间：2018年9月14日 上午9:49:29 
 * 类说明 
 */
public class QuartzContextListener implements ServletContextListener {

    @Override
    public void contextInitialized(ServletContextEvent sce) {
        // TODO Auto-generated method stub
        
    }

    @Override
    public void contextDestroyed(ServletContextEvent arg0) {
        // TODO Auto-generated method stub
        WebApplicationContext webApplicationContext = (WebApplicationContext) arg0
                .getServletContext()
                .getAttribute(
                        WebApplicationContext.ROOT_WEB_APPLICATION_CONTEXT_ATTRIBUTE);
        org.quartz.impl.StdScheduler startQuertz = (org.quartz.impl.StdScheduler) webApplicationContext
                .getBean("startQuertz");
        if(startQuertz != null) {
            startQuertz.shutdown();
        }
        try {
            Thread.sleep(1000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }

}

其中 

"startQuertz" 是在spring-quartz.xml中

 <bean id="startQuartz" lazy-init="false" autowire="no" 
          class="org.springframework.scheduling.quartz.SchedulerFactoryBean">
        <property name="triggers">
            <list>
                <ref bean="jobTriggerA"/>
                <ref bean="jobTriggerB"/>
            </list>
        </property>
         <property name="quartzProperties">  
            <props>  
                <prop key="org.quartz.scheduler.instanceName">buy_it_now</prop>
                <prop key="org.quartz.threadPool.threadCount">2</prop>  
                <prop key="org.quartz.plugin.shutdownhook.class">org.quartz.plugins.management.ShutdownHookPlugin</prop>
                <prop key="org.quartz.plugin.shutdownhook.cleanShutdown">true</prop>
                <prop key="org.quartz.threadPool.threadsInheritContextClassLoaderOfInitializingThread">true</prop>
            </props>  
        </property> 
        <property name="configLocation" value="classpath:quartz/quartz.properties"></property>
        <property name="applicationContextSchedulerContextKey" value="applicationContext" />
    </bean>

然后在web.xml中配置

<listener>
      <listener-class>com.wqq.quartz_test.schedule.QuartzContextListener</listener-class>
  </listener>

虽然不报错了，但是把这个注释掉，也不报错了，不知道程序发什么疯，可能有些原理还不知道