Format data to string with specified style. : Date Format « Data Type « Java

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Java » Data Type » Date FormatScreenshots 
Format data to string with specified style.
     
//package org.nestframework.commons.utils;

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;

public class DateUtil {
  public static long dateToLong(Date date) {
    return date.getTime();
  }

  public static Date longToDate(long longdata) {
    return new Date(longdata);
  }

  /**
   * Format data to string with specified style.
   * 
   * @param dtmDate
   *            Date
   * @param num
   *            style. 1:YYYY.MM.DD 2:hh:mm:ss 3:YYYY.MM.DD HH:MM:ss
   *            4:YYYY-MM-DD 5:YYYY 6:MM 7:DD
   * @return dateString String
   */
  public static String dateToStr(java.util.Date dtmDate, int num) {
    if (dtmDate == null)
      return "";
    String f;
    switch (num) {
    case 1:
      f = "yyyy.MM.dd";
      break;
    case 2:
      f = "kk:mm:ss";
      break;
    case 3:
      f = "yyyy.MM.dd kk:mm:ss";
      break;
    case 4:
      f = "yyyy-MM-dd";
      break;
    case 5:
      f = "yyyy";
      break;
    case 6:
      f = "MM";
      break;
    case 7:
      f = "dd";
      break;
    default:
      f = "yyyy.MM.dd kk:mm:ss";
    }
    SimpleDateFormat sdf = new SimpleDateFormat(f);
    String dateString = sdf.format(dtmDate);
    return dateString;
  }

  /**
   * Format data to string.
   * 
   * @param dtmDate
   *            Date
   * @param formatstr
   *            format
   * @return dateString String
   */
  public static String dateToStr(java.util.Date dtmDate, String formatstr) {
    SimpleDateFormat sdf = new SimpleDateFormat(formatstr);
    String dateString = sdf.format(dtmDate);
    return dateString;
  }

  /**
   * Normal data format.
   * 
   * @return String[]
   */
  private static String[] getdateformat() {
    String[] formatstring = { "yyyy-MM-dd", "yyyy/MM/dd", "yyyy.MM.dd" };
    return formatstring;
  }

  /**
   * Parse String to Date.
   * 
   * @param dateString
   *            String of Date, the format is yyyy-MM-dd or yyyy/MM/dd or
   *            yyyy.MM.dd
   * @return Date
   * @throws ParseException
   */
  public static Date stringToDate(String dateString) throws ParseException {
    String[] formatstring = getdateformat();
    int index = 0;
    Date parseDate = null;
    ParseException throwe = null;
    SimpleDateFormat sdf = new SimpleDateFormat();

    while (formatstring != null && index < formatstring.length) {
      try {
        sdf.applyPattern(formatstring[index]);
        index++;
        parseDate = sdf.parse(dateString);
        break;
      } catch (ParseException gete) {
        throwe = gete;
        continue;
      }
    }
    if (parseDate == null)
      throw throwe;
    return parseDate;
  }

}

   
    
    
    
    
  
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