Detailed explanation of the function of adding timed tasks in Java JFinal framework

public class BaseConfig extends JFinalConfig {
    ……
    /**
      * Configuration plug-in
      */
    public void configPlugin(Plugins me) {
        ……
        // Task Scheduling Plugin        (new Cron4jPlugin(("conf/")));
    }
}

# What tasks need to be scheduled? Multiple task names can be separated by commascron4j = queryCron,queryCrontwo

# cron expression debugging task = 00 00 * * *
# Whether the debugging thread is set to a daemon thread, the default value is true, and the daemon thread will be automatically closed when tomcat is closed = true
# Class file for executing tasks = 
# Whether the task is valid, the default value is true. If it is false, the task is invalid and will not be called = false

#Generate data table timing tasks for the current month# cron expression debugging task = 00 01 * * *
# Whether the debugging thread is set to a daemon thread, the default value is true, and the daemon thread will be automatically closed when tomcat is closed = true
# Class file for executing tasks = 
# Whether the task is valid, the default value is true. If it is false, the task is invalid and will not be called = true

public class QueryIndexTask implements ITask {

    @Override
    public void run() {
        ("The mission has begun");
    }

    @Override
    public void stop() {
        ("The mission is over");
    }
}