DateUtil 类

来源：互联网发布：网络语吃糠是什么意思编辑：程序博客网时间：2024/04/30 16:14

import java.sql.Date;
import java.sql.Time;
import java.sql.Timestamp;
import java.text.ParseException;
import java.text.SimpleDateFormat;

/**
*
* 
* Title:时间转换工具
* 
* 
* Description:
* 
* 
* Copyright: Copyright (c) 2005
* 
* 
* Company:
* 
*
* @author dean
* @version 1.0
*/
public class DateUtil {
/**
* 系统当前时间
*
* @return String 格式：YYYY-MM-DD hh:mm:ss
*/
public static String getSysTime() {
 String data = null;
 long now = System.currentTimeMillis();
 Date d = new Date(now);
 Time t = new Time(now);
 data = d.toString() + " " + t.toString();
 return data;
}

/**
* 系统当前日期格式：YYYY-MM-DD
*
* @return String 格式：YYYY-MM-DD
*/
public static String getSysDate()
{
  long now = System.currentTimeMillis();
  Date d = new Date(now);
  return d.toString();
}

/**
* 系统当前日期格式：YYYY-MM-DD
*
* @return String 格式：YYYYMMDD
*/
public static String getSysDateWithNoSign()
{
  long now = System.currentTimeMillis();
  Date d = new Date(now);
  return d.toString().replaceAll("-", "");
}

public static String getSysMonthDate()
{
  long now = System.currentTimeMillis();
  Date d = new Date(now);
  String dateTime = d.toString();
  dateTime = dateTime.substring(0, dateTime.lastIndexOf("-"));
  return dateTime;
}

/**
* 时间格式转换 long->String
*
* @return String
* @param date
* long 格式：YYYY-MM-DD hh:mm:ss
*/

public static String formatTime(long date) {
 String time = "";
 if (date < 1000) {
 time = getSysTime();
 } else {
 Date d = new Date(date);
 Time t = new Time(date);
 time = d.toString() + " " + t.toString();

}
return time;
}

/**
* 日期格式转换 long->String
*
* @param date
* long
* @return String 格式：YYYY-MM-DD
*/
public static String formatDate(long date) {
 String time = "";
 if (date < 1000) {
 time = getSysTime();
 } else {
 Date d = new Date(date);

time = d.toString();

}
return time;
}

/**
* 日期格式转换 String（yyyy-MM-dd�?->long
*
* @return long
*/

public static long DateFormat(String data) {
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");

  java.util.Date applyDate = null;
  try {
   applyDate = sdf.parse(data);
  } catch (ParseException e) {

   e.printStackTrace();
   return 0L;
  }
  return applyDate.getTime();
}

/**
* 时间格式转换 String（yyyy-MM-dd HH:mm:ss�?->long
*
* @param time
*            String
* @return long
*/
public static long TimeFormat(String time) {
  SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
  java.util.Date applyDate = null;
  try {
   applyDate = sdf.parse(time);
  } catch (ParseException e) {

   e.printStackTrace();
   return 0L;
  }
  return applyDate.getTime();
}

/**
* 将Date类型转换为YYYY-MM-DD的字符串
*
* @param cal
*            Date
* @return String
*/
public static String getDateString(java.util.Date cal) {
  if (cal != null) {
   SimpleDateFormat dateFormatter = new SimpleDateFormat(
     "yyyy-MM-dd hh:mm:ss");
   return dateFormatter.format(cal);
  } else
   return "";
}

/**
* getTime - 得到日历型数据的"HH:MM:SS"样式的字符串
*
*
*/
public static String getTime(java.util.Calendar cal) {
  if (cal != null) {
   SimpleDateFormat dateFormatter = new SimpleDateFormat("hh:mm:ss");
   java.util.Date theDate = cal.getTime();
   return dateFormatter.format(theDate);
  } else
   return "";
}

/**
* getDateTime - 得到日历型的 "MM-DD-YYYY , HH:MM:SS" 形式的字符串
*
*
*/
public static String getDateTime(java.util.Calendar cal) {
  if (cal != null) {
   SimpleDateFormat dateFormatter = new SimpleDateFormat(
     "yyyy-MM-dd hh:mm:ss");
   java.util.Date theDate = cal.getTime();
   return dateFormatter.format(theDate);
  } else
   return "";
}

/*
* function - 由calendar 得到�?
*
*
*
*
*/

public static String getYear(java.util.Calendar pCal) {
  Timestamp timestamp = getTimestamp(pCal);
  if (timestamp != null) {
   String dateString = timestamp.toString();
   String strYear = dateString.substring(0, 4);
   return strYear;
  } else {
   return "";
  }
}

/*
* function - 由calendar 得到�?
*
*
*
*
*/

public static String getMonth(java.util.Calendar pCal) {
  Timestamp timestamp = getTimestamp(pCal);
  if (timestamp != null) {
   String dateString = timestamp.toString();
   String strMonth = dateString.substring(5, 7);
   if (strMonth.substring(0, 1).equals("0")) {
    strMonth = strMonth.substring(1);
   }
   return strMonth;
  } else {
   return "";
  }
}

public static String getStrMonth(java.util.Calendar pCal) {
  Timestamp timestamp = getTimestamp(pCal);
  if (timestamp != null) {
   String dateString = timestamp.toString();
   String strMonth = dateString.substring(5, 7);
   return strMonth;
  } else {
   return "";
  }
}

/**
* function - 由calendar 得到�?
*/

public static String getDay(java.util.Calendar pCal) {
  Timestamp timestamp = getTimestamp(pCal);
  if (timestamp != null) {
   String dateString = timestamp.toString();
   String strDay = dateString.substring(8, 10);
   if (strDay.substring(0, 1).equals("0")) {
    strDay = strDay.substring(1);
   }
   return strDay;
  } else {
   return "";
  }
}

/**
* 取得Calendar
*
* @param pCal
*            Calendar
* @return String
*/
public static String getStrDay(java.util.Calendar pCal) {
  Timestamp timestamp = getTimestamp(pCal);
  if (timestamp != null) {
   String dateString = timestamp.toString();
   String strDay = dateString.substring(8, 10);
   return strDay;
  } else {
   return "";
  }
}

/**
* function :translate Calemdar into Timestamp
*
*
*/
public static Timestamp getTimestamp(java.util.Calendar cal) {
  if (cal != null) {
   java.util.Date tempDate = cal.getTime();
   return new Timestamp(tempDate.getTime());
  } else {
   return null;
  }
}

/** 字符串整理函数，如果为空对象返回空串�? */
public static String getFormatString(String paramStr) {
  if (paramStr == null)
   return "";
  else
   return paramStr;
}

/** 字符串整理函数，如果为空对象返回空串�? */
public static String getFormatString(Integer param) {
  if (param == null)
   return "";
  else
   return param.toString();
}

public static Date getDateforString(String dateString) {
  Date d_date = null;
  long l_date = DateFormat(dateString);
  d_date = new Date(l_date);
  return d_date;

}

public static Date getTimforString(String dateString) {
  Date d_date = null;
  long l_date = TimeFormat(dateString);
  d_date = new Date(l_date);
  return d_date;

}

public static String getSysTimeString()
{
  String data = null;
  long now = System.currentTimeMillis();
  data = String.valueOf(now);
  return data;
}

public static void main(String[] args) {
  System.out.println(DateUtil.getSysMonthDate());
  System.out.println(DateUtil.getSysDate());
}

}