定时器中实现数据库表数据移动的功能，Exception in thread "Timer-0" isExist java.lang.NullPointerException定时器中线程报错。

 package com.shawnway.trade.marketdata.constants;
 import java.sql.SQLException;
 import java.util.Calendar;
 import java.util.Date;
 import java.util.Timer;
 import java.util.TimerTask;

 import javax.persistence.EntityManager;
 import javax.persistence.PersistenceContext;

 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Component;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RequestMethod;
 import org.springframework.web.bind.annotation.ResponseBody;

 import com.shawnway.trade.marketdata.services.ChartService;

 @Component
 public class TimerConfig {
         @Autowired
         private ChartService chartService;
         @PersistenceContext
         private  EntityManager em;
         public TimerConfig(ChartService ct){//关键点解决 null指针错误，
             chartService=ct;
         }
       // Timer.scheduleAtFixedRate(TimerTask task,Date firstTime,long period)
       //每天的24：00：00执行迁移操作
     public void init() {
         Calendar calendar = Calendar.getInstance();
         calendar.set(Calendar.HOUR_OF_DAY, 15); // 控制时
         calendar.set(Calendar.MINUTE, 3);    // 控制分
         calendar.set(Calendar.SECOND, 0);    // 控制秒

         Date time = calendar.getTime();   

         Timer timer = new Timer();
         timer.scheduleAtFixedRate(new TimerTask() {

           public void run() {
               System.out.println("处理器开始运行");

             try {
                 moveStableMes();
             } catch (SQLException e) {
                 // TODO Auto-generated catch block
                 e.printStackTrace();
             }
           }
         }, time, 1000 * 60 * 60 * 24);// 这里设定将延时每天固定执行
     }
       @RequestMapping(value ="/move/moveStableMes", method = RequestMethod.GET)
       @ResponseBody
     public  void moveStableMes() throws SQLException{
         //首先判定存储表是否存在，如果存在则转移数据
         //如果不存在，先创建该存储数据表，在转移数据
         //情况临时存储表。（临时表是用来保存当天的数据。）
         Calendar c = Calendar.getInstance();
         int year=c.get(c.YEAR);
         int month=c.get(c.MONTH)+1;
         int today = c.get(c.DAY_OF_MONTH);
         String tbname="";
         if(month<=9)
             tbname="market_data_candlechart_"+Integer.toString(year)+"0"+Integer.toString(month);//数据库的名字
         else
             tbname="market_data_candlechart_"+Integer.toString(year)+Integer.toString(month);//数据库的名字
         String temperTB="market_data_candlechart";//存储临时信息的表名
         System.out.println("执行到了isExist");
         boolean flag=chartService.isExist(tbname);//判定对应的数据库是否存在
         System.out.println("isExist结束");
         if(flag){//如果已经存在了，就可以直接把临时表中的数据插入到对应的表中
             chartService.moveMesToOldTB(tbname,temperTB);//将临时表中的数据移动到tbname名称的表中。
         }else{
             chartService.createTemperTB(tbname);//如果不存在，需要先创建一个对应名称的表
             chartService.moveMesToOldTB(tbname,temperTB);//将临时表中的数据移动到tbname名称的表中。
         }
         //转移完数据后，清洗临时表的数据
         chartService.deletTemperTB(temperTB);
     }

 }

 package com.shawnway.trade.marketdata;

 import java.io.FileNotFoundException;

 import org.apache.catalina.Server;
 import org.apache.catalina.Service;
 import org.apache.catalina.connector.Connector;
 import org.apache.catalina.valves.RemoteIpValve;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
 import org.springframework.boot.context.embedded.ConfigurableEmbeddedServletContainer;
 import org.springframework.boot.context.embedded.EmbeddedServletContainerCustomizer;
 import org.springframework.boot.context.embedded.tomcat.TomcatConnectorCustomizer;
 import org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainerFactory;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.PropertySource;
 import org.springframework.core.env.Environment;

 import com.shawnway.trade.marketdata.constants.SystemConfig;
 import com.shawnway.trade.marketdata.constants.TimerConfig;
 import com.shawnway.trade.marketdata.core.collect.MarketDataCollectHandler;
 import com.shawnway.trade.marketdata.core.ctp.CTPApiHandler;
 import com.shawnway.trade.marketdata.core.ctp.CTPGatewayProxy;
 import com.shawnway.trade.marketdata.core.ctp.CTPMarketDataHandler;
 import com.shawnway.trade.marketdata.core.ctp.CTPZeroMQHandler;
 import com.shawnway.trade.marketdata.core.es.EsMarketDataHandler;
 import com.shawnway.trade.marketdata.core.es.EsunnyApiHandler;
 import com.shawnway.trade.marketdata.core.es.EsunnyGatewayProxy;
 import com.shawnway.trade.marketdata.core.sp.SharppointApiHandler;
 import com.shawnway.trade.marketdata.core.sp.SharppointGatewayProxy;
 import com.shawnway.trade.marketdata.core.sp.SpMarketDataHandler;
 import com.shawnway.trade.marketdata.services.ChartService;
 import com.shawnway.trade.marketdata.services.MapContainer;

 @PropertySource({ "file:${config.dir}/config/web.properties" })
 @SpringBootApplication
 public class ApplicationLauncher {
     @Autowired
     private Environment env;
     @Autowired
     private ChartService chartService;

     @Bean(name = { "timerConfig" }, initMethod = "init")
     public TimerConfig timerConfig() {
         System.out.println("timerConfig已经开始运行了~");
         return new TimerConfig(chartService);//

chartService传入进去，解决空指针的错误

  }  public static void main(String[] args) throws Exception {  System.setProperty("config.dir", System.getProperty("user.dir"));  final String dir = System.getProperty("config.dir");  System.setProperty("logging.config", dir + "/config/logging.xml");  SpringApplication.run(ApplicationLauncher.class, args);   }  }