获取当前时间若干年、月、日、时等工具时间工具类

package com.hpli.demo;

import java.text.SimpleDateFormat;

import java.util.Date;

import java.util.GregorianCalendar;

public class TimeUtls {

public static int PLUS = 1;

public static int MINUS = -1;

public final static int YEAR = GregorianCalendar.YEAR;

public final static int MONTH = GregorianCalendar.MONTH;

public final static int DAY_OF_MONTH = GregorianCalendar.DAY_OF_MONTH;

public final static int HOUR_OF_DAY = GregorianCalendar.HOUR_OF_DAY;

public final static int MINUTE = GregorianCalendar.MINUTE;

public final static int SECOND = GregorianCalendar.SECOND;

/**

* 将时间增加若干年

*/

public static Date getTimePlusYear(Date time, int year) {

return getTimeOperation(time, PLUS, YEAR, year);

}

/**

* 将时间减少若干年

*/

public static Date getTimeMinusYear(Date time, int year) {

return getTimeOperation(time, PLUS, MINUS, year);

}

/**

* 将时间增加若干月

*/

public static Date getTimePlusMonth(Date time, int month) {

return getTimeOperation(time, PLUS, MONTH, month);

}

/**

* 将时间减少若干月

*/

public static Date getTimeMinusMonth(Date time, int month) {

return getTimeOperation(time, PLUS, MONTH, month);

}

/**

* 将时间增加若干日

*/

public static Date getTimePlusDay(Date time, int day) {

return getTimeOperation(time, PLUS, DAY_OF_MONTH, day);

}

/**

* 将时间减少若干日

*/

public static Date getTimeMinusDay(Date time, int day) {

return getTimeOperation(time, PLUS, DAY_OF_MONTH, day);

}

/**

* 将时间增加若干时

*/

public static Date getTimePlusHour(Date time, int hour) {

return getTimeOperation(time, PLUS, HOUR_OF_DAY, hour);

}

/**

* 将时间减少若干时

*/

public static Date getTimeMinusHour(Date time, int hour) {

return getTimeOperation(time, PLUS, HOUR_OF_DAY, hour);

}

/**

* 将时间增加若干分

*/

public static Date getTimePlusMinute(Date time, int minute) {

return getTimeOperation(time, PLUS, MINUTE, minute);

}

/**

* 将时间减少若干分

*/

public static Date getTimeMinusMinute(Date time, int minute) {

return getTimeOperation(time, PLUS, MINUTE, minute);

}

/**

* 将时间增加若干秒

*/

public static Date getTimePlusSecond(Date time, int second) {

return getTimeOperation(time, PLUS, SECOND, second);

}

/**

* 将时间减少若干分

*/

public static Date getTimeMinusSecond(Date time, int second) {

return getTimeOperation(time, PLUS, SECOND, second);

}

/**

* 当前时间

*

* @return

*/

public static Date getCurrentTime() {

GregorianCalendar calendar = new GregorianCalendar();

Date date = calendar.getTime();

return date;

}

/**

* 时间核心运算函数

*

* @param time

* 原始时间

* @param operationType

* 操作类型，增加或减少

* @param field

* 时间域：年、月、日、时、分、秒

* @param value

* 增加值

* @return 运算后的时间

*/

public static Date getTimeOperation(Date time, int operationType,

int field, int value) {

GregorianCalendar calendar = new GregorianCalendar();

calendar.setTime(time);

int newValue = 0;

if (operationType == PLUS) {

newValue = calendar.get(field) + value;

} else if (operationType == MINUS) {

newValue = calendar.get(field) - value;

}

calendar.set(field, newValue);

return calendar.getTime();

}

public static void main(String[] args) {

SimpleDateFormat dateFormat = new SimpleDateFormat(

"yyyy-MM-dd HH:mm:ss.SSSSSSZ");

Date year = getTimePlusYear(getCurrentTime(), 3);

System.err.println("year: "+dateFormat.format(year));

Date month = getTimePlusMonth(getCurrentTime(), 3);

System.err.println("month: "+dateFormat.format(month));

Date Day = getTimePlusDay(getCurrentTime(), 3);

System.err.println("Day: "+dateFormat.format(Day));

Date Hour = getTimePlusHour(getCurrentTime(), 3);

System.err.println("Hour: "+dateFormat.format(Hour));

Date Minute = getTimePlusMinute(getCurrentTime(), 3);

System.err.println("Minute: "+dateFormat.format(Minute));

Date Second = getTimePlusSecond(getCurrentTime(), 3);

System.err.println("Second: "+dateFormat.format(Second));

}

}