Java中对日期的常用处理 - 丄諦啲仇魜ヤ

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Java中对日期的常用处理

转：http://www.blogjava.net/jakin/archive/2008/01/08/173736.html

posted on 2008-01-08 23:27 Crying 阅读(1045) 评论(3) 编辑收藏所属分类: JAVA基础

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# re: Java中对日期的常用处理

2008-03-10 17:52 | Crying

//将字符转化为日期DATE

String birth = addStudentForm.getBirthdayYear() + "-"+ addStudentForm.getBirthdayMonth() + "-"+ addStudentForm.getBirhthdayDay();
try {
SimpleDateFormat sd = new SimpleDateFormat("yyyy-MM-dd");
Date date = sd.parse(birth);
student.setBirthday(date);
} catch (ParseException e) {

System.out.println("插入失败插入失败插入失败插入失败插入失败插入失败");
}
////将日期转化为字符串
SimpleDateFormat sd = new SimpleDateFormat("yyyy-MM-dd");
String dd=sd.format(new Date());

////将日期转化为Timestamp

public static Timestamp convertDateToTimestamp(Date d)
{
if(d == null)
return null;
else
return new Timestamp(d.getTime());
}

------------------------------------------------------------
//第二天
public static Date getNextDate(Date date)
{
return getDateAddHour(date, 24);
}

public static Date getDateAddHour(Date date, int hour)
{
long l = date.getTime();
long n = l + (long)(hour * 60 * 60 * 1000);
Date dateAddHour = new Date(n);
return dateAddHour;
}
//前一天
public static Date getPreviousDate(Date date)
{
return getDateAddHour(date, -24);
}

注解：加一天就24 建一天就-24
以此类推 2天.....

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# re: Java中对日期的常用处理

2008-11-05 11:30 | Crying

判断新记录

private boolean isNewRecord(java.sql.Timestamp date) {
long part = (System.currentTimeMillis() - date.getTime()) / (60 * 60 * 24 * 1000);
return (part >= 0 && part < 8);
} 回复更多评论

# re: Java中对日期的常用处理

2008-11-05 11:31 | Crying

package com.ants.env.util;

import java.sql.Timestamp;

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

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import com.ants.env.finance.implement.ChPlKindImp;

// Referenced classes of package com.ants.util:
// StringUtil

public class DateUtil
{

public DateUtil()
{
}

public static Date convertStrToDate(String s)
{
return convertStrToDate(s, "yyyy-MM-dd");
}

public static Date convertStrToDate(String s, String pattern)
{
try
{
SimpleDateFormat sdf = new SimpleDateFormat(pattern);
return sdf.parse(s);
}
catch(ParseException pe)
{
pe.printStackTrace();
}
return null;
}

public static Timestamp convertStrToTimestamp(String s, String pattern)
{
try
{
SimpleDateFormat sdf = new SimpleDateFormat(pattern);
return new Timestamp(sdf.parse(s).getTime());
}
catch(ParseException pe)
{
pe.printStackTrace();
}
return null;
}

public static java.sql.Date convertStrToSQLDate(String s)
{
if(StringUtil.removeNull(s).equals(""))
return null;
else
return new java.sql.Date(convertStrToDate(s).getTime());
}

public static java.sql.Date convertStrToSQLDate()
{
return new java.sql.Date((new Date()).getTime());
}

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

public static Timestamp convertStrToTimestamp(String s)
{
if(StringUtil.removeNull(s).equals(s))
return null;
else
return new Timestamp(convertStrToDate(s).getTime());
}

public static Timestamp convertStrToTimestamp(Date d)
{
if(d == null)
return null;
else
return new Timestamp(d.getTime());
}

public static String getDateString()
{
Calendar c = Calendar.getInstance();
Date d = c.getTime();
return getDateString(d, "yyyy-MM-dd");
}

public static String getDateString(Date d)
{
return getDateString(d, "yyyy-MM-dd");
}

public static String getGeneralDateString(Date d)
{
return getDateString(d, "yyyy-MM-dd HH:mm:ss");
}

public static String getDateString(Date d, String pattern)
{
SimpleDateFormat sdf = new SimpleDateFormat(pattern);
return sdf.format(d);
}

public static boolean equals(Date d)
{
return equals(d, new Date());
}

public static boolean equals(Date d1, Date d2)
{
return getDateString(d1).equals(getDateString(d2));
}

public static java.sql.Date getSQLDate(int year, int month, int date, int hour, int minute, int second)
{
_logger.info("getSQLDate:" + getDate(year, month, date, hour, minute, second).getTime());
java.sql.Date d = new java.sql.Date(getDate(year, month, date, hour, minute, second).getTime());
_logger.info("second:" + String.valueOf(getSecond(d)));
return new java.sql.Date(getDate(year, month, date, hour, minute, second).getTime());
}

public static Date getDate(int year, int month, int date, int hour, int minute, int second)
{
Calendar c = Calendar.getInstance();
c.set(year, month, date, hour, minute, second);
_logger.info("Calendar :" + c.getTime());
return c.getTime();
}

public static int getYear(Date d)
{
Calendar c = Calendar.getInstance();
c.setTime(d);
return c.get(1);
}

public static int getMonth(Date d)
{
Calendar c = Calendar.getInstance();
c.setTime(d);
return c.get(2) + 1;
}

public static int getDay(Date d)
{
Calendar c = Calendar.getInstance();
c.setTime(d);
return c.get(5);
}

public static int getHour(Date d)
{
Calendar c = Calendar.getInstance();
c.setTime(d);
return c.get(11);
}

public static int getMinute(Date d)
{
Calendar c = Calendar.getInstance();
c.setTime(d);
return c.get(12);
}

public static int getSecond(Date d)
{
Calendar c = Calendar.getInstance();
c.setTime(d);
return c.get(13);
}

public static Timestamp convertDateToTimestamp(Date d)
{
return new Timestamp(d.getTime());
}

public static java.sql.Date getNextMonStartDate(String year, String month)
{
int yearInt = Integer.parseInt(year);
int monthInt = Integer.parseInt(month);
if(monthInt == 12)
return convertStrToSQLDate(Integer.toString(yearInt + 1) + "-1-1");
else
return convertStrToSQLDate(year + "-" + Integer.toString(monthInt + 1) + "-1");
}

public static java.sql.Date getMonStartDate(String year, String month)
{
return convertStrToSQLDate(year + "-" + month + "-1");
}

public static java.sql.Date getYearStartDate(String year)
{
return convertStrToSQLDate(year + "-1-1");
}

public static Date getDateAddHour(Date date, int hour)
{
long l = date.getTime();
long n = l + (long)(hour * 60 * 60 * 1000);
Date dateAddHour = new Date(n);
return dateAddHour;
}

public static Date getNextDate(Date date)
{
return getDateAddHour(date, 24);
}

public static Date getSecondDate(Date date)
{
return getDateAddHour(date, 48);
}

public static Date getPreviousDate(Date date)
{
return getDateAddHour(date, -24);
}

public static Date getSQLDateAddHour(java.sql.Date date, int hour)
{
long l = date.getTime();
long n = l + (long)(hour * 60 * 60 * 1000);
java.sql.Date dateAddHour = new java.sql.Date(n);
return dateAddHour;
}

public static java.sql.Date getSQLDateAddYear(java.sql.Date date, int year)
{
Calendar c = Calendar.getInstance();
c.setTime(date);
c.set(1, c.get(1) + year);
return new java.sql.Date(c.getTime().getTime());
}

public static Date getNextSQLDate(java.sql.Date date)
{
return getSQLDateAddHour(date, 24);
}

public static Date getPreviousSQLDate(java.sql.Date date)
{
return getSQLDateAddHour(date, -24);
}

public static String getStartByAllWeek(String year, int weekCount)
{
Calendar cal = Calendar.getInstance();
cal.set(Integer.parseInt(year), 0, 1);
int week = cal.get(7);
cal.add(6, (9 - week) + (weekCount - 1) * 7);
return new String(cal.get(1) + "-" + (cal.get(2) + 1) + "-" + cal.get(5));
}

public static String getStartByFirstDay(String year, int weekCount)
{
return getStartByAllWeek(year, weekCount - 1);
}

public static java.sql.Date getDateByYearQuarter(String year, String quarter)
{
if(quarter.equals("1"))
return convertStrToSQLDate(year + "-01-01");
if(quarter.equals("2"))
return convertStrToSQLDate(year + "-04-01");
if(quarter.equals("3"))
return convertStrToSQLDate(year + "-07-01");
if(quarter.equals("4"))
return convertStrToSQLDate(year + "-10-01");
else
return null;
}

public static String[] getYearlist(int yearCount)
{
return getYearlist(yearCount, 0);
}

public static String[] getYearlist(int yearCount, int addCount)
{
String yearList[] = new String[yearCount];
Date date = new Date();
String select = "";
int year = getYear(date) - yearCount / 2;
for(int i = 0; i < yearCount; i++)
{
if(i == yearCount / 2 + addCount)
select = "selected";
yearList[i] = "<option " + select + ">" + year + "</option>";
select = "";
year++;
}

return yearList;
}

public static String getQuarterName(String quarterId)
{
if(quarterId.equals("1"))
return "\u4E00\u5B63\u5EA6";
if(quarterId.equals("2"))
return "\u4E8C\u5B63\u5EA6";
if(quarterId.equals("3"))
return "\u4E09\u5B63\u5EA6";
if(quarterId.equals("4"))
return "\u56DB\u5B63\u5EA6";
if(quarterId.equals("0"))
return "\u5168\u5E74";
else
return "";
}

public static String getWeekName(Date date)
{
Calendar c = Calendar.getInstance();
c.setTime(date);
int i = c.get(7);
if(i == 1)
return "\u661F\u671F\u5929";
if(i == 2)
return "\u661F\u671F\u4E00";
if(i == 3)
return "\u661F\u671F\u4E8C";
if(i == 4)
return "\u661F\u671F\u4E09";
if(i == 5)
return "\u661F\u671F\u56DB";
if(i == 6)
return "\u661F\u671F\u4E94";
if(i == 7)
return "\u661F\u671F\u516D";
else
return "";
}

public static String getWeekName()
{
return getWeekName(new Date());
}

public static boolean isInTime(Timestamp ts, int hour)
{
long todayTime = (new Date()).getTime();
return ts.getTime() <= todayTime + (long)(hour * 60 * 60 * 1000) && ts.getTime() >= todayTime;
}

public static void main(String args[])
{
System.out.println(convertStrToTimestamp("2005-06-06 14-05-06", "yyyy-MM-dd HH-mm-ss"));
}

public static String getHourSelect(String hour)
{
String hourSelect = "";
hour = StringUtil.removeNull(hour);
if(!"".equals(hour))
hourSelect = "<option value=" + StringUtil.addZero(hour) + " selected>" + StringUtil.addZero(hour) + "</option>";
for(int i = 0; i < 24; i++)
hourSelect = hourSelect + "<option value=" + StringUtil.addZero(i) + " >" + StringUtil.addZero(i) + "</option>";

return hourSelect;
}

public static String getMinuteAndSecondSelect(String MinuteOrSecond)
{
String MinuteOrSecondSelect = "";
MinuteOrSecond = StringUtil.removeNull(MinuteOrSecond);
if(!"".equals(MinuteOrSecond))
MinuteOrSecondSelect = "<option value=" + StringUtil.addZero(MinuteOrSecond) + " selected>" + StringUtil.addZero(MinuteOrSecond) + "</option>";
for(int i = 0; i < 60; i++)
MinuteOrSecondSelect = MinuteOrSecondSelect + "<option value=" + StringUtil.addZero(i) + " >" + StringUtil.addZero(i) + "</option>";

return MinuteOrSecondSelect;
}

// private static Logger _logger;
// static Class class$0; /* synthetic field */

private static final Log _logger = LogFactory.getLog(ChPlKindImp.class);
}

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