每次当需要对日期进行处理的时候，总是会记不住库、方法和格式，所以就自己简单封装了下；包含了大部分功能，部分不常用的没有实现。 package com.tunicorn.marketing.utils;import java.sql.
每次当需要对日期进行处理的时候，总是会记不住库、方法和格式，所以就自己简单封装了下；包含了大部分功能，部分不常用的没有实现。
package com.tunicorn.marketing.utils;import java.sql.Timestamp;import java.text.ParseException;import java.text.SimpleDateFormat;import java.util.Date;public class DateUtils { public static final int YEAR = 9; public static final int HYEAR = 8; public static final int QUARTER = 7; public static final int MONTH = 6; public static final int WEEK = 5; public static final int DAY = 4; public static final int HOUR = 3; public static final int MINUTE = 2; public static final int SECOND = 1; private Date date; private SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); /* * * * 对象实例化 * * */ public DateUtils(Date date){ this.date = date; } public DateUtils(Timestamp timeStamp){ try { this.date = timeStamp; } catch (Exception e) { e.printStackTrace(); } } public DateUtils(String dateStr){ try { this.date = sdf.parse(dateStr); } catch (ParseException e) { e.printStackTrace(); } } public DateUtils(long milliseconds){ this.date = new Date(milliseconds); } /* * * * 日期类型转换相关方法 * * */ public Date toDate(){ return this.date; } public Timestamp toTimeStamp(){ return new Timestamp(this.date.getTime()); } public String toDateFormat(){ return this.sdf.format(this.date); } public String toDateFormat(String format){ SimpleDateFormat sdf = new SimpleDateFormat(format); return sdf.format(this.date); } public long toMilliSeconds(){ return this.date.getTime(); } /* * * * 获取时间段方法 * * */ public long getTimeMillis(){ return this.date.getTime(); } public String getDate(String format){ return this.toDateFormat(format); } public String getDate(){ return this.toDateFormat("yyyy-MM-dd"); } public String getTime(){ return this.toDateFormat("HH:mm:ss"); } public String getDateTime(){ return this.toDateFormat(); } public long getYear(){ return this.date.getYear(); } public long getMonth(){ return this.date.getMonth() + 1; } public long getDay(){ return this.date.getDay(); } public long getHours(){ return this.date.getHours(); } public long getMinutes(){ return this.date.getMinutes(); } public long getSeconds(){ return this.date.getSeconds(); } /* * * * 设置时间段方法 * * */ //TODO: /* * * * 日期加减运算相关方法 * * */ public void add(long type, long num){ switch(String.valueOf(type)){ case "1" : this.addYear(num); break; case "2" : this.addHyear(num); break; case "3" : this.addQuarter(num); break; case "4" : this.addMonth(num); break; case "5" : this.addWeek(num); break; case "6" : this.addDay(num); break; case "7" : this.addHours(num); break; case "8" : this.addMinutes(num); break; case "9" : this.addSeconds(num); break; } } /* * * GregorianCalendar gc=new GregorianCalendar(); * gc.setTime(new Date); * gc.add(field,value); * value为正则往后,为负则往前 * field取1加1年,取2加月,取3加周,取5加一天 * gc.set(gc.get(Calendar.YEAR),gc.get(Calendar.MONTH),gc.get(Calendar.DATE)); * return sf.format(gc.getTime()); * */ public void addSeconds(long num){ } public void addMinutes(long num){ } public void addHours(long num){ } public void addDay(long num){ } public void addWeek(long num){ } public void addMonth(long num){ } public void addQuarter(long num){ } public void addHyear(long num){ } public void addYear(long num){ } /* * * * DateUtils对象运算相关方法 * * */ public boolean gt(DateUtils dus){ return true; } public boolean lt(DateUtils dus){ return true; } public boolean ge(DateUtils dus){ return true; } public boolean le(DateUtils dus){ return true; } public long sub(DateUtils dus){ return sub(dus, SECOND); } public long sub(DateUtils dus, long type){ switch(String.valueOf(type)){ case "1" : return this.subInYear(dus); case "3" : return this.subInQuarter(dus); case "4" : return this.subInMonth(dus); case "5" : return this.subInWeek(dus); case "6" : return this.subInDay(dus); case "7" : return this.subInHours(dus); case "8" : return this.subInMinutes(dus); case "9" : return this.subInSeconds(dus); } return 0; } public long subInYear(DateUtils dus){ return 0; } public long subInQuarter(DateUtils dus){ return 0; } public long subInMonth(DateUtils dus){ return 0; } public long subInWeek(DateUtils dus){ long days = this.subInDay(dus); return days / 7; } public long subInDay(DateUtils dus){ long hours = this.subInHours(dus); return hours / 24; } public long subInHours(DateUtils dus){ long minutes = this.subInMinutes(dus); return minutes / 60; } public long subInMinutes(DateUtils dus){ long seconds = this.subInSeconds(dus); return seconds / 60; } public long subInSeconds(DateUtils dus){ long timeMillis = this.subInMilliSeconds(dus); return timeMillis / 1000; } private long subInMilliSeconds(DateUtils dus){ return this.getTimeMillis() - dus.getTimeMillis(); } /* * * * 当前日期时间相关静态方法 * * */ public static long getCurrentTimeMillis(){ return System.currentTimeMillis(); } public static String getCurrentDate(){ long tm = getCurrentTimeMillis(); DateUtils du = new DateUtils(tm); return du.getDate(); } public static String getCurrentDate(String format){ long tm = getCurrentTimeMillis(); DateUtils du = new DateUtils(tm); return du.getDate(format); } public static String getCurrentTime(){ long tm = getCurrentTimeMillis(); DateUtils du = new DateUtils(tm); return du.getTime(); } public static String getCurrentDateTime(){ long tm = getCurrentTimeMillis(); DateUtils du = new DateUtils(tm); return du.toDateFormat(); } public static void main(String[] args){ DateUtils du = new DateUtils(DateUtils.getCurrentTimeMillis()); }}