java 设置时区_Java Calendar如何设置时区

首页 > 基础教程 > 常用类 > Calendar类

Java Calendar如何设置时区

Java Calendar类设置市区实例一：

TimeZone.setDefault(TimeZone.getTimeZone(“GMT+8”));

Calendar c = Calendar.getInstance(TimeZone.getTimeZone(“GMT+8”));

c.setTime(date);

Java Calendar类设置市区实例二：

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()));

// 当前系统默认时区的时间：

Calendar calendar = new GregorianCalendar();

System.out.print(“时区：” + calendar.getTimeZone().getID() + ” “);

System.out.println(“时间：” + calendar.get(Calendar.HOUR_OF_DAY) + “:” + calendar.get(Calendar.MINUTE));

// 美国洛杉矶时区

TimeZone tz = TimeZone.getTimeZone(“America/Los_Angeles”);

// 时区转换

calendar.setTimeZone(tz);

System.out.print(“时区：” + calendar.getTimeZone().getID() + ” “);

System.out.println(“时间：” + calendar.get(Calendar.HOUR_OF_DAY) + “:” + calendar.get(Calendar.MINUTE));

Date time = new Date();

// 1、取得本地时间：

java.util.Calendar cal = java.util.Calendar.getInstance();

// 2、取得时间偏移量：

int zoneOffset = cal.get(java.util.Calendar.ZONE_OFFSET);

// 3、取得夏令时差：

int dstOffset = cal.get(java.util.Calendar.DST_OFFSET);

// 4、从本地时间里扣除这些差量，即可以取得UTC时间：

cal.add(java.util.Calendar.MILLISECOND, -(zoneOffset + dstOffset));

// 之后调用cal.get(int x)或cal.getTimeInMillis()方法所取得的时间即是UTC标准时间。

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());

// SimpleDateFormat df = new SimpleDateFormat(“yyyy-MM-dd’T’HH:mm:ss’Z'”);

// df.setTimeZone(TimeZone.getTimeZone(“UTC”));

// System.out.println(df.parse(“2014-08-23T09:20:05Z”).toString());

SimpleDateFormat df1 = new SimpleDateFormat(“yyyy-MM-dd’T’HH:mm:ss.SSS’Z'”);

Date t = new Date();

System.out.println(df1.format(t));

System.out.println(df1.format(df1.parse(“2014-08-27T18:02:59.676Z”)) + “***********”);

df1.setTimeZone(TimeZone.getTimeZone(“UTC”));

System.out.println(df1.format(t));

System.out.println(“———–“);

System.out.println(df1.format(df1.parse(“2014-08-27T18:02:59.676Z”)) + “***********”);

System.out.println(“2014-08-27T18:02:59.676Z”);

版权声明：本文为JAVASCHOOL原创文章，未经本站允许不得转载。