java時區格式

1. java時間 yyyy-MM-dd'T'HH:mm:ss.SSSZ 中的T是什麼意思

T的含義是表示時間的開始, 我們可以來看一下具體時間轉換格式的含義，如下圖

基本的類型我們平時都經常使用，也都知道他的含義，然後我來看一下

Z是表示時區，SSS是毫秒數

如果使用jdk1.8可以使用LocalDate和LocalTime來對時間進行處理，例如：

// 取當前日期：
LocalDate today = LocalDate.now(); // -> 2014-12-24// 根據年月日取日期，12月就是12：
LocalDate crischristmas = LocalDate.of(2014, 12, 25); // -> 2014-12-25// 根據字元串取：
LocalDate endOfFeb = LocalDate.parse("2014-02-28"); // 嚴格按照ISO yyyy-MM-dd驗證，02寫成2都不行，當然也有一個重載方法允許自己定義格式
LocalDate.parse("2014-02-29"); // 無效日期無法通過：DateTimeParseException: Invalid date

2. java 時間格式轉換

importjava.text.DateFormat;
importjava.text.ParseException;
importjava.text.SimpleDateFormat;
importjava.util.Date;
publicclassTest{
	publicstaticvoidmain(String[]args){
		Stringstr="2013-1-12";
		DateFormatformat1=newSimpleDateFormat("yyyy-MM-dd");
		DateFormatformat2=newSimpleDateFormat("yyyy-MM-ddHH:mm:ss");
		try{
			Datedate=format1.parse(str);
			str=format2.format(date);
			System.out.println(str);
		}catch(ParseExceptione){
			
			//TODOAuto-generatedcatchblock
			e.printStackTrace();
			
		}
	}
}

3. 關於JAVA時間格式轉換問題，涉及時區

//我實現一個時鍾窗口程序給你了，好讓你更容易理解，希望對你有幫助。 import java.awt.*; import java.awt.event.*; import java.util.*; //世界時鍾 public class TimerTest { public static void main(String[] args) { new TimerTestFrame("世界時鍾"); } } 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"); // 創建時鍾 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TimeZone.setTimeZone(String n)函數改變時區，n為時區參數名。 calendar = new GregorianCalendar(TimeZone.getTimeZone(tz)); t = new Thread(this); t.start(); setSize(125, 125); // 設置畫布大小 setBackground(Color.black); } // 重寫父類的方法繪制時鍾圖形 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()獲得當前時間 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) { } } }

4. java時間格式轉換

Dated=newDate();

SimpleDateFormats=newSimpleDateFormat("yyyy/MM/ddHH:mma",Locale.ENGLISH);System.out.println(s.format(d));

5. Java中如何顯示當前時區為 （GMT -5:00）這種格式，而不是名稱

Locale locale=Locale.CANADA;
Calendar cal=Calendar.getInstance(locale);

6. java中怎麼轉換時間的格式

這個很基本的:
我在前期JAVA WEB開發中就經常用
首先你要弄懂兩個類：一個是java.util.Date;另一個就是java.sql.Date;用強制轉換
給你最簡單的吧也是最好記的。結果集（ResultSet ）的getObject("資料庫中的欄位名")取出數據。再進行相應的轉換；如果是存儲就用結果集（ResultSet ）的setObject("資料庫中的欄位名")保存數據；

7. java中utc時間怎麼轉換為本地時間

java utc轉本地時間的方法：
1、創建一個格式化時間對象simpleDateFormat，並初始化格式yyyy-MM-dd HH:mm:ss：
SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
2、創建時區對象utcZone，獲取utc所在的時區
TimeZone utcZone = TimeZone.getTimeZone("UTC");
3、設置utc時區，為轉換做准備
simpleDateFormat.setTimeZone(utcZone);
4、獲取本地時間，並轉換
Date myDate = simpleDateFormat.parse(rawQuestion.getString("AskDateTime"));
5，按照上面的流程就轉換本地時間了。

8. Java時間格式轉換，如何獲得時區

//我實現一個時鍾窗口程序給你了，好讓你更容易理解，希望對你有幫助。
import java.awt.*;
import java.awt.event.*;
import java.util.*;

//世界時鍾
public class TimerTest {
public static void main(String[] args) {
new TimerTestFrame("世界時鍾");
}
}

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"); // 創建時鍾
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TimeZone.setTimeZone(String n)函數改變時區，n為時區參數名。
calendar = new GregorianCalendar(TimeZone.getTimeZone(tz));
t = new Thread(this);
t.start();
setSize(125, 125); // 設置畫布大小
setBackground(Color.black);
}

// 重寫父類的方法繪制時鍾圖形
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()獲得當前時間
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) {
}
}
}