JAVA常用时间类及ORACLE的时间格式

to_char(t.datelastupdated,'yyyy-mm-dd hh24:mi:ss:ff3')
,to_char(systimestamp,'YYYY-MM-DD HH24:MI:SS.FF3')

ORACLE的时间格式. 注意数据库中date类型和timestamp类型的区别

where
to_char(t.discharge_time,'yyyy-MM-dd HH24:mi:ss') >='2007-12-08 10:00:00'
and to_char(t.discharge_time,'yyyy-MM-dd HH24:mi:ss')<= '2007-12-24 10:30:00'
//
t.discharge_time >= to_date('1899-12-30 1:00:00','yyyy-MM-dd HH24:mi:ss')
and  t.discharge_time <= to_date('2008-11-24 00:00:00', 'yyyy-MM-dd HH24:mi:ss') 

select 1  from dba_tables t WHERE  t.table_name = 'TBL_SWIFTS_OPER_INFO' and t.tablespace_name='USERS';

JAVA常用时间类

package saptac.core.util;

import java.sql.Timestamp;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;

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

public class DateUtil {
 protected final static Log log = LogFactory.getLog(DateUtil.class);

 private static String defaultDatePattern = null;

 private static String timePattern = "HH:mm";
 
 public final static String DATE_Pattern = "yyyy-MM-dd hh:mm:ss";
 public static final String DATE_Pattern_2 = "yyyy-MM-dd hh:mm:ss.S";
 
 public static final void main (String a[]) {
  java.util.Date d= new java.util.Date();
  java.sql.Timestamp t = new Timestamp(d.getTime());
 
  String ret = convertTimestampToString(t,DATE_Pattern);
  System.out.println(ret);
  
  java.util.Date d2= new java.util.Date();
  java.sql.Date t2 = new java.sql.Date(d2.getTime());

  String ret2 =  convertSqlDateToString(t2, DATE_Pattern);
  System.out.println(ret2);
  
  String ret3 =  convertSqlDateToString(t2, DATE_Pattern_2);
  System.out.println(ret3);
  
  SimpleDateFormat df = new SimpleDateFormat(DATE_Pattern);
  String ret4 = df.format(t2);
  
  java.sql.Date t5 = new java.sql.Date(d2.getTime());
  java.util.Date t6 = (java.util.Date)t5;
  String ret6 =  getDateTime(DATE_Pattern,t6);
  System.out.println(ret6);
 }
 
 /**
  * 把java.sql.Date 转换成String
  * @param timestamp
  * @return
  */
 public static String convertSqlDateToString(java.sql.Date date, String pattern) {
  
  SimpleDateFormat df = new SimpleDateFormat(pattern);
  String ret = df.format(date);

  return ret;
 }
 
 
 /**
  * 把java.sql.Timestamp 转换成String
  * @param timestamp
  * @return
  */
 public static String convertTimestampToString(java.sql.Timestamp timestamp, String pattern) {
  
  SimpleDateFormat df = new SimpleDateFormat(pattern);
  String ret = df.format(timestamp);

  return ret;
 }
 
 /**
  * 获取当前时间
  * @return yyyy
  */
 public static String getCurrYear()
 {
  String ret = "";
  SimpleDateFormat df = new SimpleDateFormat("yyyy");
  ret = df.format(new Timestamp(System.currentTimeMillis()));
  return ret;
 } 
 
 /**
  * 获取当前时间
  * @return date
  */
 public static Date getNowDate()
 {
  
  return new Date(System.currentTimeMillis());
 } 
 /**
  * 获取当前时间
  * @return MM
  *
  */
 public static String getCurrMonth()
 {
  String ret = "";
  SimpleDateFormat df = new SimpleDateFormat("MM");
  ret = df.format(new Timestamp(System.currentTimeMillis()));
  return ret;
 } 
 
 /**
  * 获取下月时间
  * @input yyyyMMdd
  * @return date
  *
  */
 public static Date getEndYearMonth(String inputDate)
 {
  SimpleDateFormat df = new SimpleDateFormat("yyyyMMdd");
  Calendar ca= Calendar.getInstance();
  
  try {
   ca.setTime(df.parse(inputDate));
   ca.add(Calendar.MONTH, 1);
   ca.add(Calendar.DAY_OF_MONTH, -1);
   ca.set(Calendar.HOUR_OF_DAY, 23);
   ca.set(Calendar.MINUTE, 59);
   ca.set(Calendar.SECOND, 59);
  } catch (ParseException e) {
   e.printStackTrace();
  }
  return ca.getTime();
 } 
 /**
  * 获取当月时间
  * @input yyyyMMdd
  * @return date
  * @throws Exception
  *
  */
 public static Date getYearMonth(String inputDate) throws Exception
 {
  SimpleDateFormat df = new SimpleDateFormat("yyyyMMdd");
  Calendar ca= Calendar.getInstance();
  
  try {
   Date date=df.parse(inputDate);
   ca.set(Calendar.HOUR_OF_DAY, 0);
   ca.set(Calendar.MINUTE, 0);
   ca.set(Calendar.SECOND, 0);
   ca.setTime(date);
  } catch (Exception e) {
   throw new Exception(e.getMessage());
  }
  return ca.getTime();
 } 
 /**
  * 下月时间
  * @return yyyyMM
  *
  */
 public static String getNextMonth()
 {
  Calendar ca= Calendar.getInstance();
  ca.add(Calendar.MONTH, 1);
  SimpleDateFormat df = new SimpleDateFormat("MM");
  String ret = "";
  ret = df.format(ca.getTime());
  return ret;
 } 
 /**
  * 获取当前时间
  * @return yyyy-MM-dd hh:mm:ss
  */
 public static String getCurrTime()
 {
  String ret = "";
  SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");
  ret = df.format(new Timestamp(System.currentTimeMillis()));
  return ret;
 } 
 /**固定日期格式
  *
  * @return
  */
 public static synchronized String getDatePattern() {
  defaultDatePattern = "yyyy-MM-dd";
  return defaultDatePattern;
 }

 /**
  * 固定日期+时间格式
  * @return
  */
 public static String getDateTimePattern() {
  return DateUtil.getDatePattern() + " HH:mm:ss.S";
 }

 /**
  * 转换时间格式
  *
  * @param aDate
  *            date from database as a string
  * @return formatted string for the ui
  */
 public static final String getDate(Date aDate) {
  SimpleDateFormat df = null;
  String returnValue = "";

  if (aDate != null) {
   df = new SimpleDateFormat(getDatePattern());
   returnValue = df.format(aDate);
  }

  return (returnValue);
 }

 /**
  * 转换字符转日期
  *
  * @param aMask
  *            the date pattern the string is in
  * @param strDate
  *            a string representation of a date
  * @return a converted Date object
  * @see java.text.SimpleDateFormat
  * @throws ParseException
  */
 public static final Date convertStringToDate(String aMask, String strDate)
   throws ParseException {
  SimpleDateFormat df = null;
  Date date = null;
  df = new SimpleDateFormat(aMask);

  if (log.isDebugEnabled()) {
   log.debug("converting '" + strDate + "' to date with mask '"
     + aMask + "'");
  }

  try {
   date = df.parse(strDate);
  } catch (ParseException pe) {
   throw new ParseException(pe.getMessage(), pe.getErrorOffset());
  }

  return (date);
 }

 /**
  * 转换时间格式
  * @param theTime
  *            the current time
  * @return the current date/time
  */
 public static String getTimeNow(Date theTime) {
  return getDateTime(timePattern, theTime);
 }

 /**
  * @return the current date
  * @throws ParseException
  */
 public static Calendar getToday() throws ParseException {
  Date today = new Date();
  SimpleDateFormat df = new SimpleDateFormat(getDatePattern());
  String todayAsString = df.format(today);
  Calendar cal = new GregorianCalendar();
  cal.setTime(convertStringToDate(todayAsString));

  return cal;
 }

 /**
  * 转换时间
  * @param aMask
  *            the date pattern the string is in
  * @param aDate
  *            a date object
  * @return a formatted string representation of the date
  *
  * @see java.text.SimpleDateFormat
  */
 public static final String getDateTime(String aMask, Date aDate) {
  SimpleDateFormat df = null;
  String returnValue = "";

  if (aDate == null) {
   log.error("aDate is null!");
  } else {
   df = new SimpleDateFormat(aMask);
   returnValue = df.format(aDate);
  }

  return (returnValue);
 }

 /**
  *
  * @param aDate
  *            A date to convert
  * @return a string representation of the date
  */
 public static final String convertDateToString(Date aDate) {
  return getDateTime(getDatePattern(), aDate);
 }

 /**
  * 字符转换时间
  * @param strDate
  *            the date to convert (in format MM/dd/yyyy)
  * @return a date object
  *
  * @throws ParseException
  */
 public static Date convertStringToDate(String strDate)
    {
  Date aDate = null;

  try {
   if (log.isDebugEnabled()) {
    log.debug("converting date with pattern: " + getDatePattern());
   }

   aDate = convertStringToDate(getDatePattern(), strDate);
  } catch (ParseException pe) {
   log.error("Could not convert '" + strDate
     + "' to a date, throwing exception");
   pe.printStackTrace();
  

  }

  return aDate;
 }
 /**
  * 用于将string转换成所需要的格式
  * @param strDate 格式为YYYYMMDD的string
  * @return str 格式为YYYY-MM-DD的string
  */
    public static Timestamp converStringToSsNeedDate(String strDate)
    {  
     Timestamp date=null;
     String str = null;
     if(strDate.length()==8){
      str = strDate.substring(0,4)+"-"+strDate.substring(4,6)+"-"+strDate.substring(6,8)+" 00:00:00";
         date=Timestamp.valueOf(str);
     }
  else{
   str="2006-12-26 00:00:00";
   date=Timestamp.valueOf(str);
  }
     return date;
    }
   
 
}