问题
I want to see if a lock file modify date is more than a 5 seconds ago or it in the future (indicating the PC clock was changed back).
How can I say
- if file.modifydate < now - 5 seconds or modifydate > now
- run command a (command a will launch my Java app)
- else
- run command b (command b will send a UDP packet to a localhost port)
回答1:
As Wimmel suggested, I will be using VBScript - well actually I will be using JScript in the same way VBScript would normally be used... because I am already familiar with JavaScript.
I posted this question: Windows XP and Up: JavaScript instead of VBScript?
Which has the code I will be using
for checking modify date/time
var o = new ActiveXObject("Scripting.FileSystemObject");
var file = o.GetFile("c:\\temp\\test.js");
// WScript.Echo(file.DateLastModified); // This is the modify date/time with seconds
and code to exec my Java process
WshShell = WScript.CreateObject("WScript.Shell");
var result = WshShell.Run("command-goes-here", 0, true);
// WSH.Echo(result); // this is the exit code
command b will be to send the UDP packet using one of the suggestions from Windows BAT or CMD: send some data to a localhost udp port.
The commands would probably be the same if I used VBScript/JScript so they should work fine.
The only thing missing is: VBScript/JScript Networking: Connect either UDP or TCP
If I could use a native function, it would definitely be better than an exec of command b.
来源：https://stackoverflow.com/questions/6345153/bat-if-statement-based-on-modify-date-of-file