CronTriggerFactoryBean配置，由于要实现动态读取定时任务周期时间，所以我们要写一个类实现CronTriggerFactoryBean，类的内容如下：
public class InitCronTriggerFactoryBean extends CronTriggerFactoryBean implements Serializable {
private static final long serialVersionUID = 1L;
private SysParamServiceImpl sysParamServiceImpl;
private String key;
public void setKey(String key)
{
this.key = key;
}
public void setSysParamServiceImpl(SysParamServiceImpl sysParamServiceImpl)
{
this.sysParamServiceImpl = sysParamServiceImpl;
setCronExpression(getCronExpressionFromDB());
}
private String getCronExpressionFromDB()
{
if(StringUtils.isEmpty(key))
return "0 0 0/1 * * ?";
SysParam sysParam = new SysParam();
try
{
sysParam = sysParamServiceImpl.getNameByKey(key);
}
catch (Exception e)
{
e.printStackTrace();
}
if(sysParam != null && !StringUtils.isEmpty(sysParam.getParamValue()))
return sysParam.getParamValue();
return "0 0 0/1 * * ?";
}
}
简单说明一下：key是用来查询数据库配置的CronExpression表达式的查询条件，SysParamServiceImpl 是实现查询的类，这几个参数都要从spring配置的CronTriggerFactoryBean参数获取，注意，配置的时候，key值的配置要在SysParamServiceImpl 的配置之前，否则报空指针