DateUtil 类
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());
}
}