- 牛云
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import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.TimeZone;
public final class GetUTCTimeUtil {undefined
private static DateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm") ;
/**
* 得到UTC时间,类型为字符串,格式为"yyyy-MM-dd HH:mm"
* 如果获取失败,返回null
* @return
*/
public static String getUTCTimeStr() {undefined
StringBuffer UTCTimeBuffer = new StringBuffer();
// 1、取得本地时间:
Calendar cal = 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));
int year = cal.get(Calendar.YEAR);
int month = cal.get(Calendar.MONTH)+1;
int day = cal.get(Calendar.DAY_OF_MONTH);
int hour = cal.get(Calendar.HOUR_OF_DAY);
int minute = cal.get(Calendar.MINUTE);
UTCTimeBuffer.append(year).append("-").append(month).append("-").append(day) ;
UTCTimeBuffer.append(" ").append(hour).append(":").append(minute) ;
try{undefined
format.parse(UTCTimeBuffer.toString()) ;
return UTCTimeBuffer.toString() ;
}catch(ParseException e)
{undefined
e.printStackTrace() ;
}
return null ;
}
/**
* 将UTC时间转换为东八区时间
* @param UTCTime
* @return
*/
public static String getLocalTimeFromUTC(String UTCTime){undefined
java.util.Date UTCDate = null ;
String localTimeStr = null ;
try {undefined
UTCDate = format.parse(UTCTime);
format.setTimeZone(TimeZone.getTimeZone("GMT-8")) ;
localTimeStr = format.format(UTCDate) ;
} catch (ParseException e) {undefined
e.printStackTrace();
}
return localTimeStr ;
}
public static void main(String[] args) {undefined
String UTCTimeStr = getUTCTimeStr() ;
System.out.println(UTCTimeStr);
System.out.println(getLocalTimeFromUTC(UTCTimeStr));
}