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需要管理員權(quán)限 package com.siqi; import java.io.PrintStream; import java.net.URL; import java.net.URLConnection; import java.text.DateFormat; import java.text.SimpleDateFormat; import java.util.Date; import java.util.Locale; import java.util.TimeZone; import java.util.TimerTask; public class OSTime extends TimerTask{ public void run(){ try{ URLConnection conn = new URL("http://www.baidu.com") .openConnection(); String dateStr = conn.getHeaderField("Date"); System.out.println("獲取到的服務(wù)器時(shí)間：" + dateStr); DateFormat httpDateFormat = new SimpleDateFormat( "E, dd MMM yyyy HH:mm:ss z", Locale.US); httpDateFormat.setTimeZone(TimeZone.getTimeZone("GMT+8")); Date date = httpDateFormat.parse(dateStr); String currDate = new SimpleDateFormat("yyy-MM-dd").format(date); String currTime = new SimpleDateFormat("HH:mm:ss").format(date); setTime(currDate, currTime); } catch (Exception e) { e.printStackTrace(); } } public static void setTime(String date, String time){ String osName = System.getProperty("os.name"); String cmd = ""; try{ Process execTime; Process execDate; Process execTime; if (osName.matches("^(?i)Windows.*$")){ //windows系統(tǒng) cmd = " cmd /c date " + date; Process execDate = Runtime.getRuntime().exec(cmd); cmd = " cmd /c time " + time; execTime = Runtime.getRuntime().exec(cmd); } else { //linux系統(tǒng) cmd = " date -s " + date; execDate = Runtime.getRuntime().exec(cmd); cmd = " date -s " + time; execTime = Runtime.getRuntime().exec(cmd); } if (execDate.waitFor() == 0) System.out.println("設(shè)置系統(tǒng)日期成功：" + date); else System.out.println("設(shè)置系統(tǒng)日期成功：" + date); if (execTime.waitFor() == 0) System.out.println("設(shè)置系統(tǒng)時(shí)間成功：" + time); else System.out.println("設(shè)置系統(tǒng)時(shí)間失?。? + time); } catch (Exception e) { e.printStackTrace(); } } } package com.siqi; import java.io.File; import java.io.FileInputStream; import java.io.InputStream; import java.io.PrintStream; import java.util.Properties; import java.util.Timer; import javax.script.ScriptEngine; import javax.script.ScriptEngineManager; public class Start{ public static void main(String[] args){ try{ InputStream in = new FileInputStream(new File("config.properties")); Properties property = new Properties(); property.load(in); String cycle = property.getProperty("cycle"); System.out.println(cycle); ScriptEngineManager manager = new ScriptEngineManager(); ScriptEngine engine = manager.getEngineByName("js"); String result = engine.eval(cycle).toString(); double cycleDouble = Double.parseDouble(result); int cycleInt = (int)cycleDouble; System.out.println("定時(shí)器執(zhí)行周期為(單位ms) " + cycleInt); OSTime ostime = new OSTime(); Timer timer = new Timer(); timer.schedule(ostime, 1000L, cycleInt); } catch (Exception e) { e.printStackTrace(); } } } |
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