To parse a timed task cron into Chinese

When using the timer quartz, the cron expression, the boss said that as a development you can read, other non-development colleagues may not understand, to use a way they can understand the expression.

Fortunately our project requires an expression that is not particularly troublesome, so we have written a simplified method of converting to Chinese

Package Com.common.utils;import Java.text.parseexception;import Java.text.simpledateformat;import Java.util.arraylist;import Java.util.calendar;import Java.util.date;import Java.util.list;import Org.quartz.cronexpression;public class cronexpparser{/** * Parse corn expression, generate time series for specified date * * @param cronexpressio n Cron expression * @param crondate cron Parse date * @param result Crom Parse Time series * @return Parse successfully failed */public static Boole An parser (string cronexpression, String crondate, list<string> result) {if (cronexpression = = NULL | | cro Nexpression.length () < 1 | | Crondate = = NULL | |        Crondate.length () < 1) {return false;            } else {cronexpression exp = null;            Initialize the cron expression parser try {exp = new cronexpression (cronexpression); } catch (ParseException e) {//TODO auto-generated catch block E.prin Tstacktrace ();                return false;            }//define the build time range//define start time, 23 points before the previous day 59 minutes 59 seconds Calendar C = calendar.getinstance ();            String Sstart = crondate + "00:00:00";            SimpleDateFormat SDF = new Java.text.SimpleDateFormat ("Yyyy-mm-dd HH:mm:ss");            Date dstart = null;            try {dstart = Sdf.parse (Sstart); } catch (ParseException e) {//TODO auto-generated catch block E.prin            Tstacktrace ();            } c.settime (DStart);            C.add (Calendar.second,-1);                        DStart = C.gettime ();            Define end time, 23 points of the day 59 minutes 59 seconds C.add (Calendar.date, 1);                        Date dend = C.gettime ();            Generate time series java.util.Date dd = DStart;            DD = Exp.getnextvalidtimeafter (DD); while ((Dd.gettime () >= dstart.gettime ()) && (Dd.gettime () <= Dend.gettime ())) {Result.add (Sdf.format (DD));            DD = Exp.getnextvalidtimeafter (DD);        } exp = null;    } return true; public static string Translatetochinese (String cronexp) {if (Cronexp = = NULL | | cronexp.length () <        1) {return "cron expression is empty";        } cronexpression exp = null;        Initialize the cron expression parser try {exp = new cronexpression (CRONEXP);        } catch (ParseException e) {return "Corn expression is incorrect";        } string[] Tmpcorns = Cronexp.split ("");        StringBuffer sbuffer = new StringBuffer (); if (tmpcorns.length = = 6) {//Resolve month if (!tmpcorns[4].equals ("*")) {SBu            Ffer.append (Tmpcorns[4]). Append ("month");            } else {sbuffer.append ("monthly"); }//Parse Week if (!tmpcorns[5].equals ("*") &&!tmpcorns[5].equals ("?"))                {char[] Tmparray = Tmpcorns[5].tochararray ();                        for (char tmp:tmparray) {switch (TMP) {                            Case ' 1 ': Sbuffer.append ("Sunday");                        Break                            Case ' 2 ': Sbuffer.append ("Monday");                        Break                            Case ' 3 ': Sbuffer.append ("Tuesday");                        Break                            Case ' 4 ': Sbuffer.append ("Wednesday");                        Break                            Case ' 5 ': Sbuffer.append ("Thursday");                        Break                            Case ' 6 ': Sbuffer.append ("Friday");                        Break Case ' 7 ': sBuFfer.append ("Saturday");                        Break                            Case '-': Sbuffer.append ("to");                        Break                            Default:sBuffer.append (TMP);                    Break            }}}//Parse day if (!tmpcorns[3].equals ("?"))                 {if (!tmpcorns[3].equals ("*")) {Sbuffer.append (tmpcorns[3]). Append ("Day");                } else {sbuffer.append ("daily"); }}//Parse if (!tmpcorns[2].equals ("*")) {Sbuffer.ap            Pend (Tmpcorns[2]). Append ("Time");            } else {sbuffer.append ("every hour"); }//Resolve sub-if (!tmpcorns[1].equals ("*")) {SBUFFER.APpend (Tmpcorns[1]). Append ("min");            } else {sbuffer.append ("per minute"); }//Parse seconds if (!tmpcorns[0].equals ("*")) {Sbuffer.append (tmpcorns [0]).            Append ("seconds");            } else {sbuffer.append ("per second");            }} return sbuffer.tostring ();        }//test method public static void main (string[] args) {String cron_expression = "0 0 3 * *?";        Generates a CRON time series of the specified date String cron_date = "2016-04-26";        System.out.println (cron_expression);                System.out.println (Cronexpparser.translatetochinese (cron_expression));        list<string> ltime = new arraylist<string> (); if (! Cronexpparser.parser (Cron_expression, Cron_date, Ltime)) {System.out.println ("Cannot generate CRON expression: date," +cron_date+ "; non-conforming to rule C        Ron expression: "+cron_expression); } for (int i=0;i<ltime.size (); i++) {        System.out.println (Ltime.get (i)); }    }}

Execution Result:

0 0 3 * *? daily 3:0 0 secs 2016-04-26 03:00:00

The boss said the interface can not directly let them write expressions, it is best to have an intuitive feeling to choose,

So I designed the interface as follows: You can manually modify the execution time, or you can use the Cron expression interface to modify, the execution date modification when the description information will also be modified

<TR><TD align= "Right" >
Execution Time:
</td>
<td>
<input id= "cron" class= "tr180 td26" value= "name=" cron "type=" text "onchange=" Checkcron (); " >
<div > Description: Set Timer schedule Time Table format <b> sec </b> (0-59,*) <b> minutes </b> (0-59,*) <b> </b> (0-23,* ) <b> Day </b> (0-31,*,?) <b> month </b> (0-11) <b> week </b> (1-7,*,? 1=sun)/increment of exponential value <br> Example ①0 0 12 *? Example ②0 15,16 10 15 *? Example ③0 15 10? * 2-6</div>

</td>
</tr>
<tr>
<TD align= "Right" >
Execution Time Description:
</td>
<td>
<div id= "Crondesc" ></div>
</td>
</tr>

　　

Using a onchange method, invoking an AJAX can implement the description of the update.

function Checkcron () {var datas={"Cronexp": $ ("#cron"). Val ()}; $.ajax ({type: "post", url: "/getcrondesc", Data:datas, DataType: "Text", success:function (data) {///successful processing function $ ("#cronDesc"). HTML (data);});}

And the Cron expression of the page effect, looking for a long time, finally see what to see. Thanks to the selfless sharing of netizens, on his basis, I changed to change to their own needs, the effect is as follows.

Open a new page

Openwin (".. /.. /static/cron/cronindex.htm ", 640, 480); function Openwin (url,width,height) {var newwin = window.open (URL," _blank "," Scrollbars=yes,resizable=yes,toolbar=no,location=no,directories=no,status=no,menubar=no,top=50,left=120,width= "+width+", height= "+height);}

After selecting a value on the open page, close the child page and assign a value to a form on the parent page, calling a JS method of the parent page

function Selcron () {//Gets the value of the selected selection box var cron = $ ("#cron"). Val (); Window.opener.cron.value=cron;window.close (); Window.opener.checkCron ();}

(PS: Actually do not know how to upload attachments, forget, corn page I will not write, go to find it yourself)

To parse a timed task cron into Chinese