<update id="refreshMarketMoney">
update usertable set umoney=umoney+100
</update>
定时类代码：
package com.UserManage.common.timers;
import java.util.Calendar;
import java.util.TimerTask;
import javax.servlet.ServletContext;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import jxproduct.controller.simulatedTrading.*;
import com.UserManage.dao.SqlDao;
public class userTaskCenter extends TimerTask {
@Autowired
private SqlDao userDao;
public void updateUserTimers() {
//下面的SQl无参数，但 定时启动，报 空指针错误
//对此不熟悉，猜可能是userDao，没有初始化
userDao.update("com.UserManage.mapper.refreshMarketMoney");
}
@Override
public void run() {
updateUserTimers();
}
}
applicationContext.xml配置
<bean id="timerTask" class="com.UserManage.common.timers.userTaskCenter"></bean>
<bean id="repeatingtriger" class="org.springframework.scheduling.timer.ScheduledTimerTask">
<property name="delay">
<value>5000</value>
</property>
<property name="period">
<value>3000</value>
</property>
<property name="timerTask">
<ref local="timerTask" />
</property>
</bean>
<bean id="schedule"
class="org.springframework.scheduling.timer.TimerFactoryBean">
<property name="scheduledTimerTasks">
<list>
<ref local="repeatingtriger" />
</list>
</property>
</bean>
错误：
Exception in thread "schedule" java.lang.NullPointerException
at com.UserManage.common.timers.userTaskCenter.updateAccountTimers(tHandleSimulatedTrading.java:22)
at com.UserManage.common.timers.userTaskCenter.run(tHandleSimulatedTrading.java:30)
at java.util.TimerThread.mainLoop(Unknown Source)
at java.util.TimerThread.run(Unknown Source)
谢谢各位
