Convert an Object to a DateTime, without an Exception
/*
* Copyright Javelin Software, All rights reserved.
*/
import java.util.*;
import java.text.*;
/**
* The DateUtil is used as a Utility Class for Dates.
*
* @author Robin Sharp
*/
public class DateUtil
{
public final static long SECOND_MILLIS = 1000;
public final static long MINUTE_MILLIS = SECOND_MILLIS*60;
public final static long HOUR_MILLIS = MINUTE_MILLIS*60;
public final static long DAY_MILLIS = HOUR_MILLIS*24;
public final static long YEAR_MILLIS = DAY_MILLIS*365;
public static DateFormat OUT_DATE_FORMAT = new SimpleDateFormat("dd/MM/yyyy");
public static DateFormat OUT_TIME_FORMAT = new SimpleDateFormat("H:mm:ss");
public static DateFormat OUT_DATETIME_FORMAT = new SimpleDateFormat("d/M/yyyy H:mm:ss");
public static DateFormat OUT_TIMESTAMP_FORMAT = new SimpleDateFormat("d/M/yy H:mm:ss.SSS");
public static DateFormat IN_DATE_FORMAT = new SimpleDateFormat("d/M/yy");
public static DateFormat IN_TIME_FORMAT = new SimpleDateFormat("H:mm:ss");
public static DateFormat IN_DATETIME_FORMAT = new SimpleDateFormat("d/M/yy H:mm:ss");
public static DateFormat IN_TIMESTAMP_FORMAT = new SimpleDateFormat("d/M/yy H:mm:ss.SSS");
public static DateFormat DATE_TIME_FORMAT= new SimpleDateFormat( "yyyyMMddkkmmss" );
public static Calendar calendar = new GregorianCalendar();
static
{
IN_DATE_FORMAT.setLenient(false);
IN_TIME_FORMAT.setLenient(false);
IN_DATETIME_FORMAT.setLenient(false);
}
/**
* Create a new DateTime. To the last second. This will not create any
* extra-millis-seconds, which may cause bugs when writing to stores such as
* databases that round milli-seconds up and down.
*/
public static java.util.Date newDateTime()
{
return new java.util.Date( (System.currentTimeMillis()/SECOND_MILLIS)*SECOND_MILLIS);
}
/**
* Create a new Date. To the last day.
*/
public static java.sql.Date newDate()
{
return new java.sql.Date( (System.currentTimeMillis()/DAY_MILLIS)*DAY_MILLIS);
}
/**
* Create a new Time, with no date component.
*/
public static java.sql.Time newTime()
{
return new java.sql.Time( System.currentTimeMillis()%DAY_MILLIS);
}
/**
* Create a new Timestamp.
*/
public static java.sql.Timestamp newTimestamp()
{
return new java.sql.Timestamp( System.currentTimeMillis() );
}
/**
* Get the seconds difference
*/
public static int secondsDiff( Date earlierDate, Date laterDate )
{
if( earlierDate == null || laterDate == null ) return 0;
return (int)((laterDate.getTime()/SECOND_MILLIS) - (earlierDate.getTime()/SECOND_MILLIS));
}
/**
* Get the minutes difference
*/
public static int minutesDiff( Date earlierDate, Date laterDate )
{
if( earlierDate == null || laterDate == null ) return 0;
return (int)((laterDate.getTime()/MINUTE_MILLIS) - (earlierDate.getTime()/MINUTE_MILLIS));
}
/**
* Get the hours difference
*/
public static int hoursDiff( Date earlierDate, Date laterDate )
{
if( earlierDate == null || laterDate == null ) return 0;
return (int)((laterDate.getTime()/HOUR_MILLIS) - (earlierDate.getTime()/HOUR_MILLIS));
}
/**
* Get the days difference
*/
public static int daysDiff( Date earlierDate, Date laterDate )
{
if( earlierDate == null || laterDate == null ) return 0;
return (int)((laterDate.getTime()/DAY_MILLIS) - (earlierDate.getTime()/DAY_MILLIS));
}
/**
* Roll the java.util.Time forward or backward.
* @param startDate - The start date
* @period Calendar.YEAR etc
* @param amount - Negative to rollbackwards.
*/
public static java.sql.Time rollTime( java.util.Date startDate, int period, int amount )
{
GregorianCalendar gc = new GregorianCalendar();
gc.setTime(startDate);
gc.add(period, amount);
return new java.sql.Time(gc.getTime().getTime());
}
/**
* Roll the java.util.Date forward or backward.
* @param startDate - The start date
* @period Calendar.YEAR etc
* @param amount - Negative to rollbackwards.
*/
public static java.util.Date rollDateTime( java.util.Date startDate, int period, int amount )
{
GregorianCalendar gc = new GregorianCalendar();
gc.setTime(startDate);
gc.add(period, amount);
return new java.util.Date(gc.getTime().getTime());
}
/**
* Roll the java.sql.Date forward or backward.
* @param startDate - The start date
* @period Calendar.YEAR etc
* @param amount - Negative to rollbackwards.
*/
public static java.sql.Date rollDate( java.util.Date startDate, int period, int amount )
{
GregorianCalendar gc = new GregorianCalendar();
gc.setTime(startDate);
gc.add(period, amount);
return new java.sql.Date(gc.getTime().getTime());
}
/**
* Roll the years forward or backward.
* @param startDate - The start date
* @param years - Negative to rollbackwards.
*/
public static java.sql.Date rollYears( java.util.Date startDate, int years )
{
return rollDate( startDate, Calendar.YEAR, years );
}
/**
* Roll the days forward or backward.
* @param startDate - The start date
* @param months - Negative to rollbackwards.
*/
public static java.sql.Date rollMonths( java.util.Date startDate, int months )
{
return rollDate( startDate, Calendar.MONTH, months );
}
/**
* Roll the days forward or backward.
* @param startDate - The start date
* @param days - Negative to rollbackwards.
*/
public static java.sql.Date rollDays( java.util.Date startDate, int days )
{
return rollDate( startDate, Calendar.DATE, days );
}
/**
* Checks the day, month and year are equal.
*/
public static boolean dateEquals( java.util.Date d1, java.util.Date d2 )
{
if( d1 == null || d2 == null ) return false;
return d1.getDate() == d2.getDate() &&
d1.getMonth() == d2.getMonth() &&
d1.getYear() == d2.getYear();
}
/**
* Checks the hour, minute and second are equal.
*/
public static boolean timeEquals( java.util.Date d1, java.util.Date d2 )
{
if( d1 == null || d2 == null ) return false;
return d1.getHours() == d2.getHours() &&
d1.getMinutes() == d2.getMinutes() &&
d1.getSeconds() == d2.getSeconds();
}
/**
* Checks the second, hour, month, day, month and year are equal.
*/
public static boolean dateTimeEquals( java.util.Date d1, java.util.Date d2 )
{
if( d1 == null || d2 == null ) return false;
return d1.getDate() == d2.getDate() &&
d1.getMonth() == d2.getMonth() &&
d1.getYear() == d2.getYear() &&
d1.getHours() == d2.getHours() &&
d1.getMinutes() == d2.getMinutes() &&
d1.getSeconds() == d2.getSeconds();
}
/**
* Convert an Object of type Classs to an Object.
*/
public static Object toObject( Class clazz, Object value ) throws ParseException
{
if( value == null ) return null;
if( clazz == null ) return value;
if( java.sql.Date.class.isAssignableFrom( clazz ) ) return toDate( value );
if( java.sql.Time.class.isAssignableFrom( clazz ) ) return toTime( value );
if( java.sql.Timestamp.class.isAssignableFrom( clazz ) ) return toTimestamp( value );
if( java.util.Date.class.isAssignableFrom( clazz ) ) return toDateTime( value );
return value;
}
/**
* Convert an Object to a DateTime, without an Exception
*/
public static java.util.Date getDateTime( Object value )
{
try
{
return toDateTime( value );
}
catch( ParseException pe )
{
pe.printStackTrace();
return null;
}
}
/**
* Convert an Object to a DateTime.
*/
public static java.util.Date toDateTime( Object value ) throws ParseException
{
if( value == null ) return null;
if( value instanceof java.util.Date ) return (java.util.Date)value;
if( value instanceof String )
{
if( "".equals( (String)value ) ) return null;
return IN_DATETIME_FORMAT.parse( (String)value );
}
return IN_DATETIME_FORMAT.parse( value.toString() );
}
/**
* Convert an Object to a Date, without an Exception
*/
public static java.sql.Date getDate( Object value )
{
try
{
return toDate( value );
}
catch( ParseException pe )
{
pe.printStackTrace();
return null;
}
}
/**
* Convert an Object to a Date.
*/
public static java.sql.Date toDate( Object value ) throws ParseException
{
if( value == null ) return null;
if( value instanceof java.sql.Date ) return (java.sql.Date)value;
if( value instanceof String )
{
if( "".equals( (String)value ) ) return null;
return new java.sql.Date( IN_DATE_FORMAT.parse( (String)value ).getTime() );
}
return new java.sql.Date( IN_DATE_FORMAT.parse( value.toString() ).getTime() );
}
/**
* Convert an Object to a Time, without an Exception
*/
public static java.sql.Time getTime( Object value )
{
try
{
return toTime( value );
}
catch( ParseException pe )
{
pe.printStackTrace();
return null;
}
}
/**
* Convert an Object to a Time.
*/
public static java.sql.Time toTime( Object value ) throws ParseException
{
if( value == null ) return null;
if( value instanceof java.sql.Time ) return (java.sql.Time)value;
if( value instanceof String )
{
if( "".equals( (String)value ) ) return null;
return new java.sql.Time( IN_TIME_FORMAT.parse( (String)value ).getTime() );
}
return new java.sql.Time( IN_TIME_FORMAT.parse( value.toString() ).getTime() );
}
/**
* Convert an Object to a Timestamp, without an Exception
*/
public static java.sql.Timestamp getTimestamp( Object value )
{
try
{
return toTimestamp( value );
}
catch( ParseException pe )
{
pe.printStackTrace();
return null;
}
}
/**
* Convert an Object to a Timestamp.
*/
public static java.sql.Timestamp toTimestamp( Object value ) throws ParseException
{
if( value == null ) return null;
if( value instanceof java.sql.Timestamp ) return (java.sql.Timestamp)value;
if( value instanceof String )
{
if( "".equals( (String)value ) ) return null;
return new java.sql.Timestamp( IN_TIMESTAMP_FORMAT.parse( (String)value ).getTime() );
}
return new java.sql.Timestamp( IN_TIMESTAMP_FORMAT.parse( value.toString() ).getTime() );
}
/**
* Tells you if the date part of a datetime is in a certain time range.
*/
public static boolean isTimeInRange( java.sql.Time start, java.sql.Time end, java.util.Date d )
{
d=new java.sql.Time(d.getHours(),d.getMinutes(),d.getSeconds());
if (start==null || end==null)
{
return false;
}
if (start.before(end)&&(!(d.after(start)&&d.before(end))))
{
return false;
}
if (end.before(start)&&(!(d.after(end)||d.before(start))))
{
return false;
}
return true;
}
public static int getYear( Date date )
{
calendar.setTime( date );
return calendar.get( Calendar.YEAR );
}
public static int getMonth( Date date )
{
calendar.setTime( date );
return calendar.get( Calendar.MONTH );
}
public static int getDate( Date date )
{
calendar.setTime( date );
return calendar.get( Calendar.DATE );
}
public static int getHour( Date date )
{
calendar.setTime( date );
return calendar.get( Calendar.HOUR );
}
public static int getMinute( Date date )
{
calendar.setTime( date );
return calendar.get( Calendar.MINUTE );
}
public static int getSeconds( Date date )
{
calendar.setTime( date );
return calendar.get( Calendar.SECOND );
}
public static int getMillisecond( Date date )
{
calendar.setTime( date );
return calendar.get( Calendar.MILLISECOND );
}
/**
* Convert an Object to a String using Dates
*/
public static String toString( Object date )
{
if( date == null ) return null;
if( java.sql.Timestamp.class.isAssignableFrom( date.getClass() ) )
{
return OUT_TIMESTAMP_FORMAT.format( date );
}
if( java.sql.Time.class.isAssignableFrom( date.getClass() ) )
{
return OUT_TIME_FORMAT.format( date );
}
if( java.sql.Date.class.isAssignableFrom( date.getClass() ) )
{
return OUT_DATE_FORMAT.format( date );
}
if( java.util.Date.class.isAssignableFrom( date.getClass() ) )
{
return OUT_DATETIME_FORMAT.format( date );
}
throw new IllegalArgumentException( "Unsupported type " + date.getClass() );
}
}
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