第一次接觸Quartz的任務調度，把Job的實現類和調度的程序放在了一個java文件里但是卻出現了以下的錯誤：
org.quartz.SchedulerException: Problem instantiating class 'com.jiaoyiping.stuty_quartz.SimpleJob2' [See nested exception: java.lang.IllegalAccessException: Class org.quartz.simpl.SimpleJobFactory can not access a member of class com.jiaoyiping.stuty_quartz.SimpleJob2 with modifiers ""]
at org.quartz.simpl.SimpleJobFactory.newJob(SimpleJobFactory.java:58)
at org.quartz.simpl.PropertySettingJobFactory.newJob(PropertySettingJobFactory.java:69)
at org.quartz.core.JobRunShell.initialize(JobRunShell.java:134)
at org.quartz.core.QuartzSchedulerThread.run(QuartzSchedulerThread.java:387)
Caused by: java.lang.IllegalAccessException: Class org.quartz.simpl.SimpleJobFactory can not access a member of class com.jiaoyiping.stuty_quartz.SimpleJob2 with modifiers ""
at sun.reflect.Reflection.ensureMemberAccess(Reflection.java:95)
at java.lang.Class.newInstance0(Class.java:368)
at java.lang.Class.newInstance(Class.java:327)
at org.quartz.simpl.SimpleJobFactory.newJob(SimpleJobFactory.java:56)
... 3 more
意思是反射的時候出錯，不能實例化Job
網上查了一下，發現在反射的時候，Job的實現類需要定義成Public的，否則就無法實例化，所以把實現類和調度程序放在同一個.java文件夾下是不可行的
把Job實現類放在一個獨立的java文件里，然后把class定義成public的，然后問題就解決了。