Java 时间转换的实例代码

import java.text.ParseException;import java.text.SimpleDateFormat;import java.util.Calendar;import java.util.Date;/** * Created by Edward on 2016/6/30. */public class TimeUtil {  /**   * 将 1467341232351 转换为 指定格式 "yyyy-MM-dd HH:mm:ss.SSS"   * @param time    "1467342217645"   * @param pattern   "yyyy-MM-dd HH:mm:ss.SSS"   * @return      2016-07-01 11:03:37.645   */  public static String parseLongTime2String(String time, String pattern){    Calendar calendar = Calendar.getInstance();    calendar.setTimeInMillis(Long.valueOf(time));    return new SimpleDateFormat(pattern).format(calendar.getTime());  }  /**   * 将指定格式的字符串转化为long   * @param time  "2016-07-01 10:52:41.792"   * @param pattern "yyyy-MM-dd HH:mm:ss.SSS"   * @return     1467341561792   */  public static long parseString2LongTime(String time, String pattern)  {    Date date = null;    try {      date = new SimpleDateFormat(pattern).parse(time);    } catch (ParseException e) {      e.printStackTrace();    }    return date.getTime();  }  public static void main(String[] args)  {    Calendar calendar = Calendar.getInstance();    System.out.println(calendar.getTimeInMillis());    System.out.println(TimeUtil.parseLongTime2String(String.valueOf(calendar.getTimeInMillis()),"yyyy-MM-dd HH:mm:ss.SSS"));    System.out.println(TimeUtil.parseString2LongTime("2016-07-01 10:52:41.792","yyyy-MM-dd HH:mm:ss.SSS"));  }}