datetimeutils.java

字符串处理类

package com.jeyo.util;

/*
 *@author chenziang
 *
 *createddate 2006-6-19 22:38:54
 *
 *email : [e-mail]
 *
 *Blog : http://blog.csdn.net/dankes/
 * 
 */


import java.text.*;
import java.util.*;
import java.sql.Timestamp;
import java.util.Calendar;
import java.text.SimpleDateFormat;

public class DateTimeUtils {

  public static Timestamp getNowTimestamp() {
    Date date = new Date();
    return new java.sql.Timestamp(date.getTime());
  }

  public static java.sql.Date getNowSqlDate() {
    Date date = new Date();
    return new java.sql.Date(date.getTime());
  }

  public static String getCurrentYear() {
    try {
      Date date = new Date();
      SimpleDateFormat shortdf = new SimpleDateFormat("yyyy");
      return shortdf.format(date);
    }
    catch (IllegalArgumentException iae) {
      return "";
    }
  }

  public static String getCurrentMonth() {
    try {
      Date date = new Date();
      SimpleDateFormat shortdf = new SimpleDateFormat("MM");
      return shortdf.format(date);
    }
    catch (IllegalArgumentException iae) {
      return "";
    }
  }

  public static final String getCurrentDate() {
    try {
      Date date = new Date();
      SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd");
      return df.format(date);
    }
    catch (IllegalArgumentException iae) {
      return "";
    }
  }
  
  public static final String getFormatCurrentDate(String format) {
	    try {
	      Date date = new Date();
	      SimpleDateFormat df = new SimpleDateFormat(format);
	      return df.format(date);
	    }
	    catch (IllegalArgumentException iae) {
	      return "";
	    }
	  }

  public static final String toChineseString(Date date) {
    try {
      SimpleDateFormat shortdf = new SimpleDateFormat("yyyy年MM月dd日");
      return shortdf.format(date);
    }
    catch (IllegalArgumentException iae) {
      iae.printStackTrace();
      return "";
    }
  }

  public static final String dateToShortString(Date date) {
    return dateToShortString(date, "yyyy-MM-dd");
  }

  public static final String dateToShortString(Date date, String format) {
    try {
      SimpleDateFormat shortdf = new SimpleDateFormat(format);
      return shortdf.format(date);
    }
    catch (IllegalArgumentException iae) {
      iae.printStackTrace();
      return "";
    }
  }

  public static final String dateToLangString(Date date) {
    try {
      SimpleDateFormat longdf = new SimpleDateFormat("yyyy-MM-dd HH:mm");
      return longdf.format(date);
    }
    catch (IllegalArgumentException iae) {
      iae.printStackTrace();
      return "";
    }
  }

  public static final java.sql.Timestamp StrToTimestamp(String date) {
    try {
      SimpleDateFormat longdf = new SimpleDateFormat("yyyy-MM-dd HH:mm");
      return new java.sql.Timestamp(longdf.parse(date).getTime());
    }
    catch (Exception iae) {
      iae.printStackTrace();
      return java.sql.Timestamp.valueOf("1970-01-01 00:00:01.000000000");
    }
  }

  public static final java.sql.Date StrToSqlDate(String date) {
    try {
      return java.sql.Date.valueOf(date);
    }
    catch (Exception iae) {
      iae.printStackTrace();
      return java.sql.Date.valueOf("1970-01-01");
    }
  }

  /**
   * Formats a Date as a fifteen character long String made up of the Date's
   * padded millisecond value.
   *
   * @return a Date encoded as a String.
   */
  public static final String dateToMillis(Date date) {
    return StringUtils.zeroPadString(Long.toString(date.getTime()), 15);
  }

  public static final long dateMillis(String date) {
    SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");
    long val = 0;
    try {
      val = format.parse(date).getTime();
    }
    catch (Exception ex) {

    }
    return val;
  }

  public static final Date long2Date(String longVal) {
    Date date = new Date(Long.parseLong(longVal));
    return date;
  }

  /**
   * Default style for dates and times.
   */
  public static int DEFAULT = DateFormat.DEFAULT;

  /**
   * Short style for dates and times.
   */
  public static int SHORT = DateFormat.SHORT;

  /**
   * Medium style for dates and times.
   */
  public static int MEDIUM = DateFormat.MEDIUM;

  /**
   * Long style for dates and times.
   */
  public static int LONG = DateFormat.LONG;

  /**
   * Full style for dates and times.
   */
  public static int FULL = DateFormat.FULL;

  /**
   * Default lenient setting for getDate.
   */
  private static boolean LENIENT_DATE = false;

  /**
   * A "default" date format.
   */
  public static String ESCAPE_DATE_PATTERN = "yyyy-mm-dd";

  /**
   * Convert String to Date using given format.
   * Returns null if conversion fails.
   * Set lenient=false to disallow dates like 2001-9-32.
   * http://java.sun.com/j2se/1.4/docs/api/java/text/SimpleDateFormat.html
   * @author Hal Deadman
   */
  public static Date getDate(String dateDisplay,
                             String format, boolean lenient) {
    if (dateDisplay == null) {
      return null;
    }
    DateFormat df = null;
    try {
      if (format == null) {
        df = new SimpleDateFormat();
      }
      else {
        df = new SimpleDateFormat(format);
      }
      // setLenient avoids allowing dates like 9/32/2001
      // which would otherwise parse to 10/2/2001
      df.setLenient(false);
      return df.parse(dateDisplay);
    }
    catch (ParseException e) {
      return null;
    }
  }

  /**
   * Convert String to Date using given format.
   * Returns null if conversion fails.
   * Uses "strict" coNversion (lenient=false).
   * @author Hal Deadman
   */
  public static Date getDate(String dateDisplay, String format) {
    return getDate(dateDisplay, format, LENIENT_DATE);
  }

  /**
   * Convert String to Date using a medium (weekday day month year) format.
   * Returns null if conversion fails.
   * Uses "strict" coNversion (lenient=false).
   * @author Hal Deadman
   */
  public static Date getDate(String dateDisplay) {
    return getDate(dateDisplay, null, LENIENT_DATE);
  }

  /**
   * Return Date value using a String.
   * Null or conversion error returns null.
   * @param String representing Date
   */
  public static Date toDate(String string) {
    if (string == null) {
      return null;
    }
    else {
      try {
        return getDate(string);
      }
      catch (Throwable t) {
        return null;
      }
    }
  }

  /**
   * Convert date to String for given locale in given style.
   * A null locale will return the default locale.
   */
  public static String getDate(Date date, Locale locale, int style) {
    if (locale == null) {
      return (DateFormat.getDateInstance(style).format(date));
    }
    return (DateFormat.getDateInstance(style, locale).format(date));
  }

  /**
   * Convert date to String for default locale in given style.
   * A null locale will return the default locale.
   */
  public static String getDate(Date date, int style) {
    return getDate(date, (Locale)null, style);
  }

  /**
   * Convert date to String for default locale in DEFAULT style.
   * A null locale will return the default locale.
   */
  public static String getDate(Date date) {
    return getDate(date, (Locale)null, DEFAULT);
  }

  /**
   * Return String value representing Date.
   * Null returns null.
   * @param Date
   */
  public static String toString(Date date) {
    if (date == null) {
      return null;
    }
    else {
      return getDate(date);
    }
  }

  /**
   * Return String value representing Date.
   * Null returns null.
   * @param Date
   */
  public static String toEscape(Date date) {
    if (date == null) {
      return null;
    }
    DateFormat df = null;
    try {
      df = new SimpleDateFormat(ESCAPE_DATE_PATTERN);
    }
    catch (Throwable t) {
      return null;
    }
    df.setLenient(false);
    return df.format(date);
  }

  public static final String DATE_SEPARATOR = "-";
  public static final String TIME_SEPARATOR = ":";
  public static final String STRING_SPACE = " ";
  public static final String DATE_TIME_SEPARATOR = STRING_SPACE;

  /**
   * String to prepend to time [HH:MM:SS.d]
   * to create a Timestamp escape string ["0004-06-30"].
   */
  public static final String TIMESTAMP_DATE_ZERO = "0004-06-30";

  /**
   * String to append to date [YEAR-MM-DD]
   * to create a Timestamp escape string [" 00:00:00.0"].
   * Note: includes leading space.
   */
  public static final String TIMESTAMP_TIME_ZERO = " 00:00:00.0";

  /**
   * Escape string representing
   */
  public static String ZERO_TIMESTAMP_DISPLAY = "4-06-30 00:00:00";

  /**
   * Timestamp representing ""November 30, 0002 00:00:00".