時間工具類-月份第一天 最後一天等等時間工具欄
import java.sql.Timestamp;
import java.text.ParseException;
import java.text.ParsePosition;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Date;
import java.util.List;
import java.util.TimeZone;
public class DateUtil {
/**
* @desc 取當前時間
* @param modle:yyyyMM;yyyyMMdd;yyyy-MM-dd HH:mm:ss;"yyyy-MM-dd HH:mm:ss,SSS"
* @return date
*/
public static String getCurrentDate(String model) {
String date = "";
try {
Date dt = new Date();
SimpleDateFormat formatter = new SimpleDateFormat(model);
formatter.setTimeZone(TimeZone.getTimeZone("Asia/Shanghai"));
date = formatter.format(dt);
} catch (Exception ex) {
date = "";
}
return date;
}
/**
*@ title：格式化時間爲字符串
*@ Description: 格式化時間爲字符串
*@ param: date 日期，formatter 格式化
*@ return String
*@ throw Exception
*@ author:王宇雷
*@ date:2016-1-10
*@ modify Description 修改內容描述
*@ modify man:修改人
*@ modify date:修改時間（yyyy-MM-dd）
*/
public static String getDateToString(Date date,String formatter) {
try {
SimpleDateFormat format = new SimpleDateFormat(formatter);
format.setTimeZone(TimeZone.getTimeZone("Asia/Shanghai"));
return format.format(date);
} catch (Exception ex) {
LogUtil.error(ex);
}
return null;
}
/**
* @title getDateOfMonthNums:獲取指定日期，在指定的月數以前的日期. <br/>
* @Description:描述
* @param: param
* @return:
* @throw:
* @author:wangyl
* @date:2016-2-23下午4:00:13
* @modify Description: 修改內容描述
* @modify man:修改人
* @modify date:修改時間（yyyy-MM-dd）
*/
public static String getBeforeDateOfMonthNums(Date date, String formatter,int months) {
try {
// 以前日期
Date beforeDate = null;
// 獲得日曆
Calendar calendar = Calendar.getInstance();
// 把date時間賦給日曆
calendar.setTime(date);
// 設置爲前3月
calendar.add(calendar.MONTH, -months);
// 獲得前3月的時間
beforeDate = calendar.getTime();
//格式化
SimpleDateFormat sdf=new SimpleDateFormat(formatter);
//返回格式化前3月的時間
return sdf.format(beforeDate);
} catch (Exception ex) {
LogUtil.error(ex);
}
return null;
}
/**
*@ title：格式化字符串爲時間
*@ Description: 格式化字符串爲時間
*@ param: date 日期，model 格式:yyyy/MM/dd等
*@ return java.sql.Date
*@ throw Exception
*@ author:wanghr
*@ date:2016-4-15
*@ modify Description 修改內容描述
*@ modify man:修改人
*@ modify date:修改時間（yyyy-MM-dd）
*/
public static java.sql.Date getDateFromString(String date,String model){
long long_date = 0;
java.sql.Date sql_date = null;
try {
long_date = new SimpleDateFormat(model).parse(date).getTime();
sql_date = new java.sql.Date(long_date);
return sql_date;
} catch (ParseException e) {
LogUtil.error(e);
}
return null;
}
/**
*@ title：獲取當前月的初一時間
*@ Description: 獲取當前月的初一時間
*@ param:
*@ return
*@ throw Exception:
*@ author:wanghr
*@ date:2016-4-25
*@ modify Description 修改內容描述
*@ modify man:修改人
*@ modify date:修改時間（yyyy-MM-dd）
*/
public static String getMonthEarly(){
String array[] = DateUtil.getCurrentDate("yyyy-MM-dd").split("-");
String monthEarly = array[0]+"-"+array[1]+"-"+"01";
return monthEarly;
}
/**
*
* <p>獲取指定日期的最大日期<p>
* @param dateStr
* @param formatter
* @return
* @author
*/
public static Date getMaxDateOfMonth(String dateStr,String formatter) {
SimpleDateFormat sdf = new SimpleDateFormat(formatter);
try {
Date date = sdf.parse(dateStr);
Calendar c = Calendar.getInstance();
if (date != null) {
c.setTime(date);
} else {
c.setTime(new Date());
}
//獲取年
int year = c.get(Calendar.YEAR);
// 獲取月
int month = c.get(Calendar.MONTH) + 1;
// 返回天數
int days = getDays(year,month);
Calendar newC = Calendar.getInstance();
newC.set(year, month - 1, days);
return newC.getTime();
} catch (ParseException e) {
e.printStackTrace();
}
return null;
}
/**
* 是否閏年
*
* @param year
* @return
*/
public static boolean isLeap(int year) {
return (year % 400 == 0 || (year % 100 != 0 && year % 4 == 0));
}
/**
* 返回一個月的天數
*
* @param year
* @param month
* @return
*/
public static int getDays(int year, int month) {
return (month == 2) ? (isLeap(year) ? 29 : 28)
: ((((month < 7) && (month % 2 == 0)) || ((month > 8) && (month % 2 == 1))) ? 30 : 31);
}
/**
* 獲取當前日期的前或者後的日期
* @param flag
* @return
* 若是flag= -1 表示前一天，flag = 1表示後一天 ，flag= 0表示的是當天
*/
public static String getYesterday(int flag){
String str = "";
try {
Calendar calendar = Calendar.getInstance();
SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd");
//calendar.setTime(df.parse(date));
calendar.add(Calendar.DATE, flag);
str = df.format(calendar.getTime());
System.out.println(calendar);
} catch (Exception e) {
e.printStackTrace();
}
System.out.println(str);
return str;
}
public static String getfirstDayMonth(){
SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");
//獲取前月的第一天
Calendar cale = null;
cale = Calendar.getInstance(); //獲取當前日期
cale.add(Calendar.MONTH, 0);
cale.set(Calendar.DAY_OF_MONTH, 1); //設置爲1號,當前日期既爲本月第一天
String firstDay = format.format(cale.getTime());
return firstDay;
}
public static String getlastDayMonth(){
SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");
//獲取前月的最後
Calendar cale = null;
cale = Calendar.getInstance(); //獲取當前日期
cale = Calendar.getInstance();
cale.add(Calendar.MONTH, 1);
cale.set(Calendar.DAY_OF_MONTH, 0);
String lastDay = format.format(cale.getTime());
return lastDay;
}
/**
* 根據給的月份(2016-08)獲取第一個月
* @param month
* @return
*/
public static String getFirstMonth(String month) {
if(StringUtil.isEmpty(month)) {
return getCurrentDate("yyyy") + "-01";
} else {
return month.substring(0, 4) + "-01";
}
}
public static String getCurrentDate(String model,int flag){
String str = "";
try {
Calendar calendar = Calendar.getInstance();
SimpleDateFormat df = new SimpleDateFormat(model);
df.setTimeZone(TimeZone.getTimeZone("Asia/Shanghai"));
//calendar.setTime(df.parse(date));
calendar.add(Calendar.DATE, flag);
str = df.format(calendar.getTime());
} catch (Exception e) {
e.printStackTrace();
}
return str;
}
//判斷當前日期是否在指定時間以前
public static boolean before(String time){
boolean retValue=false;
Timestamp x = Timestamp.valueOf(DateUtil.getCurrentDate("yyyy-MM-dd",0)+" "+time);
retValue = new Timestamp(System.currentTimeMillis()).before(x);
return retValue;
}
//判斷當前日期是否在指定時間以後
public static boolean after(String time){
boolean retValue=false;
Timestamp x = Timestamp.valueOf(DateUtil.getCurrentDate("yyyy-MM-dd",0)+" "+time);
retValue = new Timestamp(System.currentTimeMillis()).after(x);
return retValue;
}
//計算兩個日期之間相差月份
public static int diffMonthdates(String startDate, String endDate, String model) {
int result = 0;
try{
SimpleDateFormat df=new SimpleDateFormat(model);
Date d0=df.parse(startDate);
Date d1=df.parse(endDate);
result = (d1.getYear() - d0.getYear()) * 12 + d1.getMonth() - d0.getMonth();
}catch(Exception ex){
ex.printStackTrace();
}
return result;
}
/**
* 根據傳入時間字符串得到須要格式的三種加減時間串
* @param strDate 時間字符串
* @param model 格式
* @param temp 加減項
* @param i 加減量
* @return
*/
public static String getDateByStrNum(String strDate,String model,int temp,int i) {
SimpleDateFormat formatter = new SimpleDateFormat(model);
ParsePosition pos = new ParsePosition(0);
Date strtodate = formatter.parse(strDate, pos);
Calendar cal = Calendar.getInstance();
cal.setTime(strtodate);
cal.add(temp, i);
return formatter.format(cal.getTime());
}
/**
* 得到兩個日期之間的全部月份
* @param minDate
* @param maxDate
* @return
*/
public static List<String> getMonthBetween(String minDate, String maxDate) throws ParseException{
List<String> result = new ArrayList<String>();
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM");//格式化爲年月
Calendar min = Calendar.getInstance();
Calendar max = Calendar.getInstance();
min.setTime(sdf.parse(minDate));
min.set(min.get(Calendar.YEAR), min.get(Calendar.MONTH), 1);
max.setTime(sdf.parse(maxDate));
max.set(max.get(Calendar.YEAR), max.get(Calendar.MONTH), 2);
Calendar curr = min;
while (curr.before(max)) {
result.add(sdf.format(curr.getTime()));
curr.add(Calendar.MONTH, 1);
}
return result;
}
public static String toFormatterStr(String dateStr) {
String formatter = "yyyy年MM月";
Date date = parseToDate(dateStr, "yyyy-MM");
return getDateToString(date, formatter);
}
public static String toFormatterStr(String formatter, String dateStr) {
if (StringUtil.isEmpty(formatter)) {
formatter = "yyyy年MM月dd日";
}
Date date = parseToDate(dateStr, "yyyy-MM-dd");
return getDateToString(date, formatter);
}
/**
* 將長時間格式字符串轉換爲時間 yyyy-MM-dd HH:mm:ss
*
* @param strDate
* @return
*/
public static Date parseToDate(String strDate, String formatter) {
SimpleDateFormat f = new SimpleDateFormat(formatter);
ParsePosition pos = new ParsePosition(0);
Date strtodate = f.parse(strDate, pos);
return strtodate;
}
public static void main(String[] args) {
//System.out.println(getFirstMonth("2018-09"));
//System.out.println(getMonthBetween("2016-12-21","2016-12-28"));
//System.out.println(""+getDateToString(getMaxDateOfMonth("2016-12","yyyy-MM"),"yyyy-MM-dd"));
}
}
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
public class WeekUtils {
public static void main(String[] args) {
WeekUtils cd = new WeekUtils();
/* System.out.println("開始時間: " + cd.getStartDayOfWeekNo(2017,9) );
System.out.println("結束時間:" + cd.getEndDayOfWeekNo(2017,9) );
System.out.println(DateUtil.getCurrentDate("yyyy-MM"));*/
/* String month="2017-03";
System.out.println(cd.getMonthfirstDate(month));
System.out.println(cd.getMonthlastDate(month)); */
}
/**
* 根據給定的月份獲取本月第一天
* @param month
* @return
*/
public String getMonthfirstDate(String month){
String firstDate=month+"-01";
try {
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM");
SimpleDateFormat sdf1 = new SimpleDateFormat("yyyy-MM-dd");
Date someDate=sdf.parse(month);
Calendar ca = Calendar.getInstance();
ca.setTime(someDate); // someDate 爲你要獲取的那個月的時間
ca.set(Calendar.DAY_OF_MONTH, 1);
//第一天
Date firstDate1 = ca.getTime();
firstDate=sdf1.format(firstDate1);
return firstDate;
} catch (ParseException e) {
e.printStackTrace();
}
return firstDate;
}
/**
* 根據給定的月份獲取本月最後1天
* @param month
* @return
*/
public String getMonthlastDate(String month){
String lastDate=month+"-30";
try {
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM");
SimpleDateFormat sdf1 = new SimpleDateFormat("yyyy-MM-dd");
Date someDate=sdf.parse(month);
Calendar ca = Calendar.getInstance();
ca.setTime(someDate); // someDate 爲你要獲取的那個月的時間
ca.add(Calendar.MONTH, 1);
ca.add(Calendar.DAY_OF_MONTH, -1);
//最後一天
Date lastDate1 = ca.getTime();
lastDate=sdf1.format(lastDate1);
return lastDate;
} catch (ParseException e) {
e.printStackTrace();
}
return lastDate;
}
/**
* get first date of given month and year
* @param year
* @param month
* @return 本月第一天
*/
public String getFirstDayOfMonth(int year,int month){
String monthStr = month < 10 ? "0" + month : String.valueOf(month);
return year + "-"+monthStr+"-" +"01";
}
/**
* get the last date of given month and year
* @param year
* @param month
* @return 本月最後一天
*/
public String getLastDayOfMonth(int year,int month){
Calendar calendar = Calendar.getInstance();
calendar.set(Calendar.YEAR , year);
calendar.set(Calendar.MONTH , month - 1);
calendar.set(Calendar.DATE , 1);
calendar.add(Calendar.MONTH, 1);
calendar.add(Calendar.DAY_OF_YEAR , -1);
return calendar.get(Calendar.YEAR) + "-" + (calendar.get(Calendar.MONTH) + 1) + "-" +
calendar.get(Calendar.DAY_OF_MONTH);
}
/**
* get Calendar of given year
* @param year
* @return
*/
private Calendar getCalendarFormYear(int year){
Calendar cal = Calendar.getInstance();
cal.set(Calendar.DAY_OF_WEEK, Calendar.MONDAY);
cal.set(Calendar.YEAR, year);
return cal;
}
/** 週一
* get start date of given week no of a year
* @param year
* @param weekNo
* @return
* @throws Exception
*/
public String getStartDayOfWeekNo(int year,int weekNo) {
Calendar cal = getCalendarFormYear(year);
cal.set(Calendar.WEEK_OF_YEAR, weekNo);
String strDate= cal.get(Calendar.YEAR) + "-" + (cal.get(Calendar.MONTH) + 1) + "-" +
cal.get(Calendar.DAY_OF_MONTH);
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
Date date;
String date1="";
try {
date = sdf.parse(strDate);
date1=sdf.format(date);
} catch (ParseException e) {
e.printStackTrace();
}
return date1;
}
/**
* 週二
* @param year
* @param weekNo
* @return
*/
public String getTuesdayOfWeekNo(int year,int weekNo){
Calendar cal = getCalendarFormYear(year);
cal.set(Calendar.WEEK_OF_YEAR, weekNo);
cal.add(Calendar.DAY_OF_WEEK, 1);
String strDate= cal.get(Calendar.YEAR) + "-" + (cal.get(Calendar.MONTH) + 1) + "-" +
cal.get(Calendar.DAY_OF_MONTH);
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
String date1="";
Date date;
try {
date = sdf.parse(strDate);
date1=sdf.format(date);
} catch (ParseException e) {
e.printStackTrace();
}
return date1;
}
/**
* 週三
* @param year
* @param weekNo
* @return
*/
public String getWednesdayOfWeekNo(int year,int weekNo){
Calendar cal = getCalendarFormYear(year);
cal.set(Calendar.WEEK_OF_YEAR, weekNo);
cal.add(Calendar.DAY_OF_WEEK, 2);
String strDate= cal.get(Calendar.YEAR) + "-" + (cal.get(Calendar.MONTH) + 1) + "-" +
cal.get(Calendar.DAY_OF_MONTH);
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
String date1="";
Date date;
try {
date = sdf.parse(strDate);
date1=sdf.format(date);
} catch (ParseException e) {
e.printStackTrace();
}
return date1;
}
/**
* 週四
* @param year
* @param weekNo
* @return
*/
public String getThursdayOfWeekNo(int year,int weekNo){
Calendar cal = getCalendarFormYear(year);
cal.set(Calendar.WEEK_OF_YEAR, weekNo);
cal.add(Calendar.DAY_OF_WEEK, 3);
String strDate= cal.get(Calendar.YEAR) + "-" + (cal.get(Calendar.MONTH) + 1) + "-" +
cal.get(Calendar.DAY_OF_MONTH);
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
String date1="";
Date date;
try {
date = sdf.parse(strDate);
date1=sdf.format(date);
} catch (ParseException e) {
e.printStackTrace();
}
return date1;
}
/**
* 週五
* @param year
* @param weekNo
* @return
*/
public String getFridayOfWeekNo(int year,int weekNo){
Calendar cal = getCalendarFormYear(year);
cal.set(Calendar.WEEK_OF_YEAR, weekNo);
cal.add(Calendar.DAY_OF_WEEK, 4);
String strDate= cal.get(Calendar.YEAR) + "-" + (cal.get(Calendar.MONTH) + 1) + "-" +
cal.get(Calendar.DAY_OF_MONTH);
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
String date1="";
Date date;
try {
date = sdf.parse(strDate);
date1=sdf.format(date);
} catch (ParseException e) {
e.printStackTrace();
}
return date1;
}
/**
* get the end day of given week no of a year.
* @param year
* @param weekNo
* @return 週末
*/
public String getEndDayOfWeekNo(int year,int weekNo){
Calendar cal = getCalendarFormYear(year);
cal.set(Calendar.WEEK_OF_YEAR, weekNo);
cal.add(Calendar.DAY_OF_WEEK, 6);
String strDate= cal.get(Calendar.YEAR) + "-" + (cal.get(Calendar.MONTH) + 1) + "-" +
cal.get(Calendar.DAY_OF_MONTH);
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
String date1="";
Date date;
try {
date = sdf.parse(strDate);
date1=sdf.format(date);
} catch (ParseException e) {
e.printStackTrace();
}
return date1;
}
}
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