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package com.fr.plugin.ztzzSSO.utils;
import java.sql.Timestamp;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Date;
import java.util.List;
public class DateUtilSelf {
/**
* 日期转换为日期字符串
* @param date
* @param formatStr
* @return String
*/
public static String DateToString(Date date,String formatStr) {
SimpleDateFormat sdf = new SimpleDateFormat(formatStr);
String dateStr = sdf.format(date).toString();
return dateStr;
}
/**
* 日期字符串转换日期
* @param dateStr
* @param formatStr
* @return Date
*/
public static Date strToDate(String dateStr,String formatStr){
SimpleDateFormat sdf = new SimpleDateFormat(formatStr);
Date date = null;
try {
date = sdf.parse(dateStr);
}
catch(Exception e) {
}
return date;
}
/**
* Date转Timestamp
* @param date
* @return
*/
public static Timestamp dateToTimestamp(Date date) {
Date transDate = DateUtilSelf.strToDate(DateUtilSelf.DateToString(date, "yyyy-MM-dd hh:mm:ss"),"yyyy-MM-dd hh:mm:ss");
Timestamp timestamp = new Timestamp(transDate.getTime());
return timestamp;
}
/**
* Date字符串转Timestamp
* @param dateStr
* @param format
* @return
*/
public static Timestamp strToTimestamp(String dateStr,String format) {
Date date = strToDate(dateStr,format);
Timestamp timestamp = new Timestamp(date.getTime());
return timestamp;
}
/**
* 获取两个日期字符串之间的天数
* @param startDateStr
* @param endDateStr
* @param formatStr
* @return
*/
public static int getDays(String startDateStr,String endDateStr,String formatStr) {
Date startDate = strToDate(startDateStr,formatStr);
Date endDate = strToDate(endDateStr,formatStr);
long startTime = startDate.getTime();
long endTime = endDate.getTime();
int days = (int) ((endTime - startTime)/(60*60*24*1000));
return days;
}
/**
* 获取给定时间之前之后的时间
* @param type
* @param dateStr
* @param count
* @param formatStr
* @return
*/
public static String getAfterDateStr(int type,String dateStr,int count,String formatStr) {
Date startDate = strToDate(dateStr,formatStr);
Calendar calendar = Calendar.getInstance();
calendar.setTime(startDate);
calendar.add(type, count);
String endDateStr = DateToString(calendar.getTime(),formatStr);
return endDateStr;
}
/**
* 获取给定时间之前之后的时间
* @param type
* @param date
* @param count
* @param formatStr
* @return
*/
public static String getAfterDateStr(int type,Date date,int count,String formatStr) {
Calendar calendar = Calendar.getInstance();
calendar.setTime(date);
calendar.add(type, count);
String endDateStr = DateToString(calendar.getTime(),formatStr);
return endDateStr;
}
/**
* 获取给定时间之前之后的时间
* @param type
* @param date
* @param count
* @return
*/
public static Date getAfterDateStr(int type,Date date,int count) {
Calendar dateResult = Calendar.getInstance();
dateResult.setTime(date);
dateResult.add(type, count);
return dateResult.getTime();
}
/**
* 时间戳转日期
* @param timestamp
* @return
*/
public static Date timestampToDate(Timestamp timestamp) {
Date date = new Date(timestamp.getTime());
return date;
}
/**
* 时间戳转时间字符串
* @param timestamp
* @param format 日期格式
* @return
*/
public static String timestampToStr(Timestamp timestamp,String format) {
Date date = timestampToDate(timestamp);
String timeStr = DateToString(date, format);
return timeStr;
}
/**
* 获取所给日期length天内每一天的日期
* @param date 所给日期(yyyy-MM-dd)
* @param length 长度
* @return
*/
public static List<String> getDateList(String date,int length){
List<String> dateList = new ArrayList<String>();
String format = "yyyy-MM-dd";
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
//获取length天后的日期
String targetDate = getAfterDateStr(Calendar.DATE,date,length,format);
Date start = null;
Date end = null;
if(length >= 0) {
start = strToDate(date,format);
end = strToDate(targetDate,format);
}else {
start = strToDate(targetDate,format);
end = strToDate(date,format);
}
Calendar calBegin = Calendar.getInstance();
calBegin.setTime(start);
Calendar calEnd = Calendar.getInstance();
calEnd.setTime(end);
while (end.after(calBegin.getTime())) {
calBegin.add(Calendar.DATE, 1);
String dayStr = sdf.format(calBegin.getTime());
dateList.add(dayStr);
}
return dateList;
}
/**
* 比较startDate是否在endDate之前
* @param startDate
* @param endDate
* @param format
* @return 0 两个日期相等 <0 开始日期在结束日期之前 >0 开始日期在结束日期之后
*/
public static int comparisonDate(String startDate,String endDate,String format) {
Date start = strToDate(startDate,format);
Date end = strToDate(endDate,format);
return start.compareTo(end);
}
//获取当前日期年、月、日、时、分、秒
public static int getCount(int type){
Calendar calendar = Calendar.getInstance();
return calendar.get(type);
}
}