package com.util;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.*;
import com.ibm.icu.util.Calendar;
/**
* 日期转换工具
* @author Administrator
*
*/
public
class DateUtils {
/**
* 将日期形转为yyyy-MM-dd形式
*
* @param date
* @return
*/
public static String date2String(Date date) {
if (date != null) {
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
return sdf.format(date);
} else {
return "";
}
}
/**
* 将日期形转为yyyy-MM-dd形式
*
* @param date
* @return
*/
public static String date2Year(Date date) {
if (date != null) {
SimpleDateFormat sdf = new SimpleDateFormat("yyyy");
return sdf.format(date);
} else {
return "";
}
}
/**
* 将日期形转为MM-yy形式
*
* @param date
* @return
*/
public static String date2StringMMyy(Date date) {
if (date != null) {
SimpleDateFormat sdf = new SimpleDateFormat("MM-dd");
return sdf.format(date);
} else {
return "";
}
}
/**
* 将日期对象转为中文的字符形式
* @param date
* @return
*/
public static String date2ChineseString(Date date) {
if (date != null) {
SimpleDateFormat sdf = new SimpleDateFormat("yyyy年MM月dd日");
return sdf.format(date);
} else {
return "";
}
}
/**
* 将日期转为yyyyMM的形式
* @param date
* @return
*/
public static String date2String1(Date date) {
if (date != null) {
SimpleDateFormat sdf = new SimpleDateFormat("yyyyMM");
return sdf.format(date);
} else {
return "";
}
}
/**
* 将yyyy-MM-dd 类型的字符串转为日期
*
* @param dateStr
* @return
*/
public static Date string2Date(String dateStr) {
if (dateStr != null && !"".equals(dateStr)) {
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
try {
return sdf.parse(dateStr);
} catch (Exception e) {
System.out.println(e);
}
}
return null;
}
/**
* 将yyyy-MM-dd HH:MM 类型的字符串转为日期
*
* @param dateStr
* @return
*/
public static Date string2Date_All(String dateStr) {
if (dateStr != null && !"".equals(dateStr)) {
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-mm-dd hh:mm:ss");
try {
return sdf.parse(dateStr);
} catch (Exception e) {
System.out.println(e);
}
}
return null;
}
/**
* 将yyyyMMdd 类型的字符串转为日期
*
* @param dateStr
* @return
*/
public static Date string2Date_ymd(String dateStr) {
if (dateStr != null && !"".equals(dateStr)) {
SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMdd");
try {
return sdf.parse(dateStr);
} catch (Exception e) {
System.out.println(e);
}
}
return null;
}
/**
* 将yyyy:MM:dd 类型的字符串转为日期
*
* @param dateStr
* @return
*/
public static Date string2Date_y_m_d(String dateStr) {
if (dateStr != null && !"".equals(dateStr)) {
SimpleDateFormat sdf = new SimpleDateFormat("yyyy:MM:dd");
try {
return sdf.parse(dateStr);
} catch (Exception e) {
System.out.println(e);
}
}
return null;
}
/**
* 将yyyy-MM-dd 类型的字符串转为日期
*
* @param dateStr
* @return
*/
public static Date string_YMD_Date(String dateStr) {
if (dateStr != null && !"".equals(dateStr)) {
SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMdd");
try {
return sdf.parse(dateStr);
} catch (Exception e) {
System.out.println(e);
}
}
return null;
}
public static Date string2Date2(String dateStr) {
if (dateStr != null && !"".equals(dateStr)) {
SimpleDateFormat sdf = new SimpleDateFormat("dd/MM/yyyy");
try {
return sdf.parse(dateStr);
} catch (Exception e) {
System.out.println(e);
}
}
return null;
}
/**
* 将yyyy-MM-dd 类型的字符串转为日期
*
* @param dateStr
* @return
*/
public static Date string2Date1(String dateStr) {
if (dateStr != null && !"".equals(dateStr)) {
SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMdd");
try {
return sdf.parse(dateStr);
} catch (Exception e) {
System.out.println(e);
}
}
return null;
}
/**
* 将日期分成年月日
* @param date
* @return
*/
public static Map date2YMD(String dateStr){
Map dateMap = new HashMap();
if(dateStr != null){
Date date = string2Date(dateStr);
Calendar calendar = Calendar.getInstance();
calendar.setTime(date);
int year = calendar.get(Calendar.YEAR);
int month = calendar.get(Calendar.MONTH )+1;
int day = calendar.get(Calendar.DAY_OF_MONTH );
dateMap.put("year", year+"");
dateMap.put("month", month+"");
dateMap.put("day", day+"");
return dateMap;
}else{
dateMap.put("year", "");
dateMap.put("month", "");
dateMap.put("day", "");
return dateMap;
}
}
/**
* 根据15、16原则返回年月
* @param date
* @return
*/
public static Map date2YM(String dateStr){
Map dateMap = new HashMap();
if(dateStr != null){
Date date = string2Date(dateStr);
Calendar calendar = Calendar.getInstance();
calendar.setTime(date);
int year1 = calendar.get(Calendar.YEAR);
int month1 = calendar.get(Calendar.MONTH )+1;
int day1 = calendar.get(Calendar.DAY_OF_MONTH );
int year2 = 0;
int month2 = 0;
//year2计算后年
if((month1+1)>12 && day1>15){year2=year1+1;}else{year2=year1;}
//month2计算后月
if(day1<=15){month2=month1;}
else{
if((month1+1)<=12){month2=month1+1;}
else{month2=month1+1-12;}
}
dateMap.put("year", year2+"");
dateMap.put("month", month2+"");
return dateMap;
}else{
dateMap.put("year", "");
dateMap.put("month", "");
return dateMap;
}
}
/**
* 计算两个日期相差多少年，月，日
* @param dateStrBegin
* @param dateStrEnd
* @return
* @throws Exception
*/
public static Map dateSubtract(String dateStrBegin,String dateStrEnd) throws Exception{
Calendar cal = Calendar.getInstance();
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
Date date1 = sdf.parse(dateStrBegin);
Date date2 = sdf.parse(dateStrEnd);
cal.setTime(date1);
Integer y1 = new Integer(cal.fieldDifference(date2, Calendar.YEAR));
Integer m1 = new Integer(cal.fieldDifference(date2, Calendar.MONTH));
Integer d1 = new Integer(cal.fieldDifference(date2, Calendar.DATE));
Map fieldMap = new HashMap();
fieldMap.put("year", y1);
fieldMap.put("month", m1);
fieldMap.put("day", d1);
return fieldMap;
}
/**
* 取得两个日期间隔时间
* @param d1
* @param d2
* @return
*/
public static int getDaysBetween (java.util.Calendar d1, java.util.Calendar d2) {
if (d1.after(d2)) { // swap dates so that d1 is start and d2 is end
java.util.Calendar swap = d1;
d1 = d2;
d2 = swap;
}
int days = d2.get(java.util.Calendar.DAY_OF_YEAR) -
d1.get(java.util.Calendar.DAY_OF_YEAR);
int y2 = d2.get(java.util.Calendar.YEAR);
if (d1.get(java.util.Calendar.YEAR) != y2) {
d1 = (java.util.Calendar) d1.clone();
do {
days += d1.getActualMaximum(java.util.Calendar.DAY_OF_YEAR);
d1.add(java.util.Calendar.YEAR, 1);
} while (d1.get(java.util.Calendar.YEAR) != y2);
}
return days;
}
/**
* 格式化日期为*年*月*日
* @param dateStr
* @return
*/
public static String string2String(String dateStr) throws Exception{
if (dateStr != null && !"".equals(dateStr)) {
DateFormat dateFormat = DateFormat.getDateInstance(DateFormat.LONG);
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
Date date = sdf.parse(dateStr);
String dateString = dateFormat.format(date);
return dateString;
} else {
return "";
}
}
/**
* 将时间转为0点0分0秒
* @param d
* @return
*/
public static Date get0Time(Date d){
if(d==null){
return d;
}
Calendar c = Calendar.getInstance();
c.setTime(d);
c.set(Calendar.MILLISECONDS_IN_DAY,0);
return c.getTime();
}
/**
* 将时间转为23:59:59秒
* @param d
* @return
*/
public static Date get24Time(Date d){
if(d==null){
return d;
}
Calendar calendar = Calendar.getInstance();
calendar.setTime(d);
calendar.set(Calendar.HOUR_OF_DAY,23);
calendar.set(Calendar.MINUTE,59);
calendar.set(Calendar.SECOND,59);
return calendar.getTime();
}
/**
* 根据传入的年份和月份获得这个月的最大天数<br>
*
* @param year
* @param month
* @return
*/
public static int getMaxDaybyYearAndMonth(int year, int month) {
int days[] = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
if (2 == month && 0 == (year % 4)
&& (0 != (year % 100) || 0 == (year % 400))) {
days[1] = 29;
}
return (days[month - 1]);
}
/**
* 当前时间加上天数后的时间
* @param date
* @param days
* @return
*/
public static Date getAddDate(Date date,int days){
if(date==null){
return null;
}
Calendar c = Calendar.getInstance();
c.setTime(date);
c.add(Calendar.DAY_OF_YEAR,days);
return c.getTime();
}
public static void main(String args[]) throws Exception{
}
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/**
* 取得当前年份
* @return
*/
public static int getCurrentYear(){
Calendar calendar = Calendar.getInstance();
return calendar.get(Calendar.YEAR);
}
/**
* 取得当前月
* @return
*/
public static int getCurrentMonth(){
Calendar calendar = Calendar.getInstance();
return calendar.get(Calendar.MONTH)+1;
}
public static String getDateTimeString(Date d){
if(d==null){
return "";
}
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm");
return sdf.format(d);
}
}
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