java时区格式

1. java时间 yyyy-MM-dd'T'HH:mm:ss.SSSZ 中的T是什么意思

T的含义是表示时间的开始, 我们可以来看一下具体时间转换格式的含义，如下图

基本的类型我们平时都经常使用，也都知道他的含义，然后我来看一下

Z是表示时区，SSS是毫秒数

如果使用jdk1.8可以使用LocalDate和LocalTime来对时间进行处理，例如：

// 取当前日期：
LocalDate today = LocalDate.now(); // -> 2014-12-24// 根据年月日取日期，12月就是12：
LocalDate crischristmas = LocalDate.of(2014, 12, 25); // -> 2014-12-25// 根据字符串取：
LocalDate endOfFeb = LocalDate.parse("2014-02-28"); // 严格按照ISO yyyy-MM-dd验证，02写成2都不行，当然也有一个重载方法允许自己定义格式
LocalDate.parse("2014-02-29"); // 无效日期无法通过：DateTimeParseException: Invalid date

2. java 时间格式转换

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. 关于JAVA时间格式转换问题，涉及时区

//我实现一个时钟窗口程序给你了，好让你更容易理解，希望对你有帮助。 import java.awt.*; import java.awt.event.*; import java.util.*; //世界时钟 public class TimerTest { public static void main(String[] args) { new TimerTestFrame("世界时钟"); } } 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"); // 创建时钟 ClockCanvas clk2 = new ClockCanvas("巴黎", "GMT+2"); ClockCanvas clk3 = new ClockCanvas("华盛顿", "GMT-4"); ClockCanvas clk4 = new ClockCanvas("洛衫矶", "GMT-7"); ClockCanvas clk5 = new ClockCanvas("伦敦", "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); // 设置框架宽高 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; //也可以通过TimeZone.setTimeZone(String n)函数改变时区，n为时区参数名。 calendar = new GregorianCalendar(TimeZone.getTimeZone(tz)); t = new Thread(this); t.start(); setSize(125, 125); // 设置画布大小 setBackground(Color.black); } // 重写父类的方法绘制时钟图形 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()获得当前时间 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时间格式转换

Dated=newDate();

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

5. Java中如何显示当前时区为 （GMT -5:00）这种格式，而不是名称

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

6. java中怎么转换时间的格式

这个很基本的:
我在前期JAVA WEB开发中就经常用
首先你要弄懂两个类：一个是java.util.Date;另一个就是java.sql.Date;用强制转换
给你最简单的吧也是最好记的。结果集（ResultSet ）的getObject("数据库中的字段名")取出数据。再进行相应的转换；如果是存储就用结果集（ResultSet ）的setObject("数据库中的字段名")保存数据；

7. java中utc时间怎么转换为本地时间

java utc转本地时间的方法：
1、创建一个格式化时间对象simpleDateFormat，并初始化格式yyyy-MM-dd HH:mm:ss：
SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
2、创建时区对象utcZone，获取utc所在的时区
TimeZone utcZone = TimeZone.getTimeZone("UTC");
3、设置utc时区，为转换做准备
simpleDateFormat.setTimeZone(utcZone);
4、获取本地时间，并转换
Date myDate = simpleDateFormat.parse(rawQuestion.getString("AskDateTime"));
5，按照上面的流程就转换本地时间了。

8. Java时间格式转换，如何获得时区

//我实现一个时钟窗口程序给你了，好让你更容易理解，希望对你有帮助。
import java.awt.*;
import java.awt.event.*;
import java.util.*;

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

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"); // 创建时钟
ClockCanvas clk2 = new ClockCanvas("巴黎", "GMT+2");
ClockCanvas clk3 = new ClockCanvas("华盛顿", "GMT-4");
ClockCanvas clk4 = new ClockCanvas("洛衫矶", "GMT-7");
ClockCanvas clk5 = new ClockCanvas("伦敦", "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); // 设置框架宽高
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;
//也可以通过TimeZone.setTimeZone(String n)函数改变时区，n为时区参数名。
calendar = new GregorianCalendar(TimeZone.getTimeZone(tz));
t = new Thread(this);
t.start();
setSize(125, 125); // 设置画布大小
setBackground(Color.black);
}

// 重写父类的方法绘制时钟图形
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()获得当前时间
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) {
}
}
}