package com.common;
import java.math.BigDecimal;
import java.util.Calendar;
import java.util.TimeZone;
public class Common {
/**
* 获取当前毫秒转int
*
* @return
*/
public Integer getCurTimestamp() {
long l = System.currentTimeMillis();
return (int) (l / 1000);
}
// 获取今天0点的时间戳
public static Integer getCurDayZeroTimestamp(){
Calendar cal = Calendar.getInstance();
cal.set(Calendar.HOUR_OF_DAY, 0);
cal.set(Calendar.SECOND, 0);
cal.set(Calendar.MINUTE, 0);
cal.set(Calendar.MILLISECOND, 0);
return (int) (cal.getTimeInMillis()/1000);
}
// 获取 当月0点的时间戳
public static Integer getCurMonthZeroTimestamp(){
Calendar cal = Calendar.getInstance();
cal.set(cal.get(Calendar.YEAR),cal.get(Calendar.MONDAY), cal.get(Calendar.DAY_OF_MONTH), 0, 0,0);
cal.set(Calendar.DAY_OF_MONTH,cal.getActualMinimum(Calendar.DAY_OF_MONTH));
return (int) (cal.getTimeInMillis()/1000);
}
// 获取今年 0点的时间戳
public static Integer getCurYearZeroTimestamp(){
Calendar c = Calendar.getInstance();
c.add(Calendar.YEAR, 0);
c.set(Calendar.DAY_OF_YEAR, 1);//设置为1号,当前日期既为本年第一天
//将小时至0
c.set(Calendar.HOUR_OF_DAY, 0);
//将分钟至0
c.set(Calendar.MINUTE, 0);
//将秒至0
c.set(Calendar.SECOND,0);
//将毫秒至0
c.set(Calendar.MILLISECOND, 0);
// 获取今天第一天的时间戳
return (int) (c.getTimeInMillis()/1000);
}
/*
* 将时间转换为时间戳
*/
public static String dateToStamp(String s) throws ParseException{
String res;
SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
Date date = simpleDateFormat.parse(s);
long ts = date.getTime()/ 1000;
res = String.valueOf(ts);
return res;
}
/*
* 将时间戳转换为时间
*/
public static String stampToDate(String s){
String res;
SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
long lt = new Long(s);
Date date = new Date(lt*1000);
res = simpleDateFormat.format(date);
return res;
}
/**
* 计算当前月 , 共有多少天
*
* @return
*/
private int getDaysByYearMonth() {
Calendar cal = Calendar.getInstance(); // 调用Calendar 中的方法;
cal.set(Calendar.DAY_OF_MONTH, 1); // 把时间调整为当月的第一天;
cal.add(Calendar.MONTH, 1); // 月份调至下个月;
cal.add(Calendar.DAY_OF_MONTH, -1); // 时间减去一天(就等于上个月的最后一天)
int month = cal.get(Calendar.MONTH) + 1; // 调取月份(月份在表示中会少 1,如:1月份得出数字是
// 0;
int days = cal.get(Calendar.DAY_OF_MONTH);// 调取当月的天数。
return days;
}
}
时间戳工具类
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转载自blog.csdn.net/diyu122222/article/details/78539210
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