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本文目錄一覽

• 1，Java中如何將時(shí)間設(shè)置為12小時(shí)制并區(qū)分上下
• 2，java DateFormat類的setTimeZoneTimeZone zone怎樣使用
• 3，JAVA環(huán)境時(shí)間調(diào)整
• 4，關(guān)于JAVA時(shí)間格式轉(zhuǎn)換問(wèn)題涉及時(shí)區(qū)
• 5，java中如何設(shè)置時(shí)間和顯示時(shí)間
• 6，在java里面如何得到UTC時(shí)間 時(shí)間格式為T(mén)ue Oct 12 000000
• 7，Java時(shí)間格式轉(zhuǎn)換如何獲得時(shí)區(qū)

1，Java中如何將時(shí)間設(shè)置為12小時(shí)制并區(qū)分上下

首先是小時(shí)取出，然后就是判斷：1. 當(dāng)小時(shí)是大于等于12，就是下午；2. 當(dāng)小于12 ，就是上午；；3.

java中將12小時(shí)制的時(shí)間轉(zhuǎn)換為24小時(shí)制的方式如下： import java.text.simpledateformat; import java.util.date; public class ceshi { public static void main(string[] args) { simpledateformat objsdateformat = new simpledateformat( "yyyy-mm-dd hh:mm:ss");//轉(zhuǎn)換為24小時(shí)制 string strcurrenttime = objsdateformat.format(new date()); system.out.println(strcurrenttime); } }注：大寫(xiě)的hh為24小時(shí)制，小寫(xiě)的hh為12小時(shí)制，當(dāng)然還可以在ss的后面加上 a，這樣可以在后面顯示上下文：顯示效果為“2008-03-24 17:00:14 下午” 運(yùn)行結(jié)果為：

2，java DateFormat類的setTimeZoneTimeZone zone怎樣使用

123456setTimeZonepublic void setTimeZone(TimeZone zone)為此 DateFormat 對(duì)象的日歷設(shè)置時(shí)區(qū)。參數(shù)：zone - 給定的新時(shí)區(qū)。TimeZone12345678getDefaultpublic static TimeZone getDefault()獲取此主機(jī)的默認(rèn) TimeZone。默認(rèn) TimeZone 的來(lái)源可能隨實(shí)現(xiàn)的變化而變化。返回：默認(rèn)的 TimeZone。另請(qǐng)參見(jiàn)：setDefault(java.util.TimeZone)12345678getTimeZonepublic static TimeZone getTimeZone(String ID)獲取給定 ID 的 TimeZone。參數(shù)：ID - TimeZone 的 ID，要么是縮寫(xiě)（如 "PST" ），要么是全名（如 "America/Los_Angeles"），要么是自定義 ID（如 "GMT-8:00"）。注意，對(duì)縮寫(xiě)的支持只是出于 JDK 1.1.x 兼容性的考慮，因此應(yīng)該使用全名。返回：指定的 TimeZone，如果給定的 ID 無(wú)法理解，則返回 GMT 區(qū)域。
1234 DateFormat dateFormat = new SimpleDateFormat(); //dateFormat.setTimeZone(TimeZone.getDefault()); dateFormat.setTimeZone(TimeZone.getTimeZone("EET")); System.out.println(dateFormat.format(new Date()));

3，JAVA環(huán)境時(shí)間調(diào)整

你的這個(gè)問(wèn)題系 系統(tǒng) JVM的事,可以設(shè)置下時(shí)區(qū),通過(guò)以下的語(yǔ)句:import java.util.*;TimeZone tz = TimeZone.getTimeZone("ETC/GMT-8");TimeZone.setDefault(tz);//顯示Java能識(shí)別的系統(tǒng)中所有正確的時(shí)區(qū)/**String[] ids = TimeZone.getAvailableIDs();for(int i = 0; i < ids.length; i++)System.out.println(ids[i].toString());*/我也是復(fù)制的 ，你自己看看吧?。?/p>

為了使使用jdk更方便。你看教程里編譯運(yùn)行程序只需打javac test.javajava test如果你不設(shè)環(huán)境變量，這些命令就得這么打了c:\program files\java\jdk1.6.0_10\bin\javac test.javac:\program files\java\jdk1.6.0_10\bin\java test很麻煩吧你可以在qq里以java為關(guān)鍵字搜索。最好進(jìn)標(biāo)明容納新人的群，不然很容易被t出來(lái)。good luck.

4，關(guān)于JAVA時(shí)間格式轉(zhuǎn)換問(wèn)題涉及時(shí)區(qū)

//我實(shí)現(xiàn)一個(gè)時(shí)鐘窗口程序給你了，好讓你更容易理解，希望對(duì)你有幫助。import java.awt.*; import java.awt.event.*; import java.util.*; //世界時(shí)鐘 public class TimerTest { public static void main(String[] args) { new TimerTestFrame("世界時(shí)鐘"); } } class TimerTestFrame extends Frame { /** * */ private static final long serialVersionUID = 1L; public TimerTestFrame(String s) { super(s); addWindowListener(new WindowAdapter() { public void windowClosing(WindowEvent e) { dispose(); System.exit(0); } }); setLayout(new GridLayout(2, 6)); ClockCanvas clk1 = new ClockCanvas("北京", "GMT+8"); // 創(chuàng)建時(shí)鐘 ClockCanvas clk2 = new ClockCanvas("巴黎", "GMT+2"); ClockCanvas clk3 = new ClockCanvas("華盛頓", "GMT-4"); ClockCanvas clk4 = new ClockCanvas("洛衫磯", "GMT-7"); ClockCanvas clk5 = new ClockCanvas("倫敦", "GMT+1"); ClockCanvas clk6 = new ClockCanvas("芝加哥", "GMT-5"); add(clk1); add(clk2); add(clk3); add(clk4); add(clk5); add(clk6); setSize(500, 350); // 設(shè)置框架寬高 setVisible(true); } } class ClockCanvas extends Canvas implements Runnable { /** * */ private static final long serialVersionUID = 1L; private int seconds = 0; private String city; private GregorianCalendar calendar; Thread t; public ClockCanvas(String c, String tz) { city = c; //也可以通過(guò)TimeZone.setTimeZone(String n)函數(shù)改變時(shí)區(qū)，n為時(shí)區(qū)參數(shù)名。calendar = new GregorianCalendar(TimeZone.getTimeZone(tz)); t = new Thread(this); t.start(); setSize(125, 125); // 設(shè)置畫(huà)布大小 setBackground(Color.black); } // 重寫(xiě)父類的方法繪制時(shí)鐘圖形 public void paint(Graphics g) { Graphics2D g2d = (Graphics2D) g; BasicStroke bstroke = new BasicStroke(2.0f); g2d.setStroke(bstroke); g2d.setColor(Color.green); g2d.drawOval(0, 0, 100, 100); bstroke = new BasicStroke(5.0f); g2d.setStroke(bstroke); g2d.drawLine(50, 0, 50, 5); g2d.drawLine(0, 50, 5, 50); g2d.drawLine(50, 95, 50, 98); g2d.drawLine(95, 50, 98, 50); double hourAngle = 2 * Math.PI * (seconds - 3 * 60 * 60) / (12 * 60 * 60); double minuteAngle = 2 * Math.PI * (seconds - 15 * 60) / (60 * 60); double secondAngle = 2 * Math.PI * (seconds - 15) / (60); bstroke = new BasicStroke(5.0f); g2d.setStroke(bstroke); g2d.drawLine(50, 50, 50 + (int) (30 * Math.cos(hourAngle)), 50 + (int) (30 * Math.sin(hourAngle))); bstroke = new BasicStroke(3.0f); g2d.setStroke(bstroke); g2d.drawLine(50, 50, 50 + (int) (40 * Math.cos(minuteAngle)), 50 + (int) (40 * Math.sin(minuteAngle))); bstroke = new BasicStroke(1.0f); g2d.setStroke(bstroke); g2d.drawLine(50, 50, 50 + (int) (45 * Math.cos(secondAngle)), 50 + (int) (45 * Math.sin(secondAngle))); g2d.setColor(Color.red); g2d.drawString(city, 35, 115); } public void timeElapsed() { //new Date()獲得當(dāng)前時(shí)間 System.out.println(new Date()); calendar.setTime(new Date()); seconds = calendar.get(Calendar.HOUR) * 60 * 60 + calendar.get(Calendar.MINUTE) * 60 + calendar.get(Calendar.SECOND); } public void run() { try { while (true) { Thread.sleep(300); timeElapsed(); repaint(); } } catch (InterruptedException e) { } } }

5，java中如何設(shè)置時(shí)間和顯示時(shí)間

System.currentmils()獲取從格林威治時(shí)間到當(dāng)前的毫秒數(shù)。然后你去書(shū)上查下吧 具體的我不記得了。

JAVA中獲取當(dāng)前系統(tǒng)時(shí)間2011-07-06 20:45 并格式化輸出:import java.util.Date;import java.text.SimpleDateFormat;public class NowString public static void main(String[] args) SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");//設(shè)置日期格式 System.out.println(df.format(new Date()));// new Date()為獲取當(dāng)前系統(tǒng)時(shí)間 }}設(shè)置時(shí)間，推薦 使用java.util.Calendar類來(lái)進(jìn)行操作，import java.util.Date;import java.util.Calendar;import java.text.SimpleDateFormat;public class TestDatepublic static void main(String[] args)Date now = new Date();SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss");//可以方便地修改日期格式String hehe = dateFormat.format( now );System.out.println(hehe);Calendar c = Calendar.getInstance();//可以對(duì)每個(gè)時(shí)間域單獨(dú)修改int year = c.get(Calendar.YEAR);int month = c.get(Calendar.MONTH);int date = c.get(Calendar.DATE);int hour = c.get(Calendar.HOUR_OF_DAY);int minute = c.get(Calendar.MINUTE);int second = c.get(Calendar.SECOND);System.out.println(year + "/" + month + "/" + date + " " +hour + ":" +minute + ":" + second);}}

用qq直接開(kāi)啟視頻就好了啊。。

6，在java里面如何得到UTC時(shí)間 時(shí)間格式為T(mén)ue Oct 12 000000

你的0800表示的是時(shí)區(qū)，也有這樣的(new Date()).toUTCString()我問(wèn)了幾個(gè)人，他們都說(shuō)是js的

public class stringtodate public static void main(string []args) string mystring="2011-09-18 11:20:30"; date mydate=null; dateformat df = dateformat.getdateinstance(); //設(shè)置時(shí)間格式 simpledateformat myformdate = new simpledateformat("yyyy-mm-dd hh:mm:ss"); try mydate = df.parse(mystring); } catch (parseexception e) // todo auto-generated catch block e.printstacktrace(); }system.out.println(mydate);}}結(jié)果：sun sep 18 00:00:00 cst 2011

Calendar gc = GregorianCalendar.getInstance(); cal.add(java.util.Calendar.MILLISECOND, -(zoneOffset + dstOffset)); //之后調(diào)用cal.get(int x)或cal.getTimeInMillis()方法所取得的時(shí)間即是UTC標(biāo)準(zhǔn)時(shí)間。System.out.println("UTC:"+new Date(cal.getTimeInMillis())); 贈(zèng)送其它時(shí)間方法，總有一款適合您public static void main(String[] args) SimpleDateFormat foo = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss"); System.out.println("foo:"+foo.format(new Date())); Calendar gc = GregorianCalendar.getInstance(); System.out.println("gc.getTime():"+gc.getTime()); System.out.println("gc.getTimeInMillis():"+new Date(gc.getTimeInMillis())); //當(dāng)前系統(tǒng)默認(rèn)時(shí)區(qū)的時(shí)間： Calendar calendar=new GregorianCalendar(); System.out.print("時(shí)區(qū)："+calendar.getTimeZone().getID()+" "); System.out.println("時(shí)間："+calendar.get(Calendar.HOUR_OF_DAY)+":"+calendar.get(Calendar.MINUTE)); //美國(guó)洛杉磯時(shí)區(qū) TimeZone tz=TimeZone.getTimeZone("America/Los_Angeles"); //時(shí)區(qū)轉(zhuǎn)換 calendar.setTimeZone(tz); System.out.print("時(shí)區(qū)："+calendar.getTimeZone().getID()+" "); System.out.println("時(shí)間："+calendar.get(Calendar.HOUR_OF_DAY)+":"+calendar.get(Calendar.MINUTE)); Date time=new Date(); //1、取得本地時(shí)間： java.util.Calendar cal = java.util.Calendar.getInstance(); //2、取得時(shí)間偏移量： int zoneOffset = cal.get(java.util.Calendar.ZONE_OFFSET); //3、取得夏令時(shí)差： int dstOffset = cal.get(java.util.Calendar.DST_OFFSET); //4、從本地時(shí)間里扣除這些差量，即可以取得UTC時(shí)間： cal.add(java.util.Calendar.MILLISECOND, -(zoneOffset + dstOffset)); //之后調(diào)用cal.get(int x)或cal.getTimeInMillis()方法所取得的時(shí)間即是UTC標(biāo)準(zhǔn)時(shí)間。System.out.println("UTC:"+new Date(cal.getTimeInMillis())); Calendar calendar1 = Calendar.getInstance(); TimeZone tztz = TimeZone.getTimeZone("GMT"); calendar1.setTimeZone(tztz); System.out.println(calendar.getTime()); System.out.println(calendar.getTimeInMillis()); } 運(yùn)算結(jié)果是Tue Oct 19 16:54:57 CST 2010 符合你的要求只是以毫秒來(lái)算的

7，Java時(shí)間格式轉(zhuǎn)換如何獲得時(shí)區(qū)

//我實(shí)現(xiàn)一個(gè)時(shí)鐘窗口程序給你了，好讓你更容易理解，希望對(duì)你有幫助。import java.awt.*;import java.awt.event.*;import java.util.*;//世界時(shí)鐘public class TimerTest public static void main(String[] args) new TimerTestFrame("世界時(shí)鐘"); }}class TimerTestFrame extends Frame /** * */ private static final long serialVersionUID = 1L; public TimerTestFrame(String s) super(s); addWindowListener(new WindowAdapter() public void windowClosing(WindowEvent e) dispose(); System.exit(0); } }); setLayout(new GridLayout(2, 6)); ClockCanvas clk1 = new ClockCanvas("北京", "GMT+8"); // 創(chuàng)建時(shí)鐘 ClockCanvas clk2 = new ClockCanvas("巴黎", "GMT+2"); ClockCanvas clk3 = new ClockCanvas("華盛頓", "GMT-4"); ClockCanvas clk4 = new ClockCanvas("洛衫磯", "GMT-7"); ClockCanvas clk5 = new ClockCanvas("倫敦", "GMT+1"); ClockCanvas clk6 = new ClockCanvas("芝加哥", "GMT-5"); add(clk1); add(clk2); add(clk3); add(clk4); add(clk5); add(clk6); setSize(500, 350); // 設(shè)置框架寬高 setVisible(true); }}class ClockCanvas extends Canvas implements Runnable /** * */ private static final long serialVersionUID = 1L; private int seconds = 0; private String city; private GregorianCalendar calendar; Thread t; public ClockCanvas(String c, String tz) city = c; //也可以通過(guò)TimeZone.setTimeZone(String n)函數(shù)改變時(shí)區(qū)，n為時(shí)區(qū)參數(shù)名。calendar = new GregorianCalendar(TimeZone.getTimeZone(tz)); t = new Thread(this); t.start(); setSize(125, 125); // 設(shè)置畫(huà)布大小 setBackground(Color.black); } // 重寫(xiě)父類的方法繪制時(shí)鐘圖形 public void paint(Graphics g) Graphics2D g2d = (Graphics2D) g; BasicStroke bstroke = new BasicStroke(2.0f); g2d.setStroke(bstroke); g2d.setColor(Color.green); g2d.drawOval(0, 0, 100, 100); bstroke = new BasicStroke(5.0f); g2d.setStroke(bstroke); g2d.drawLine(50, 0, 50, 5); g2d.drawLine(0, 50, 5, 50); g2d.drawLine(50, 95, 50, 98); g2d.drawLine(95, 50, 98, 50); double hourAngle = 2 * Math.PI * (seconds - 3 * 60 * 60) / (12 * 60 * 60); double minuteAngle = 2 * Math.PI * (seconds - 15 * 60) / (60 * 60); double secondAngle = 2 * Math.PI * (seconds - 15) / (60); bstroke = new BasicStroke(5.0f); g2d.setStroke(bstroke); g2d.drawLine(50, 50, 50 + (int) (30 * Math.cos(hourAngle)), 50 + (int) (30 * Math.sin(hourAngle))); bstroke = new BasicStroke(3.0f); g2d.setStroke(bstroke); g2d.drawLine(50, 50, 50 + (int) (40 * Math.cos(minuteAngle)), 50 + (int) (40 * Math.sin(minuteAngle))); bstroke = new BasicStroke(1.0f); g2d.setStroke(bstroke); g2d.drawLine(50, 50, 50 + (int) (45 * Math.cos(secondAngle)), 50 + (int) (45 * Math.sin(secondAngle))); g2d.setColor(Color.red); g2d.drawString(city, 35, 115); } public void timeElapsed() //new Date()獲得當(dāng)前時(shí)間 System.out.println(new Date()); calendar.setTime(new Date()); seconds = calendar.get(Calendar.HOUR) * 60 * 60 + calendar.get(Calendar.MINUTE) * 60 + calendar.get(Calendar.SECOND); } public void run() try while (true) Thread.sleep(300); timeElapsed(); repaint(); } } catch (InterruptedException e) } }}

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