Java返回昨天凌晨时间和今天凌晨时间的工具类

Bertha 。 2023-09-28 19:54 104阅读 0赞

import java.sql.Timestamp;
    import java.text.SimpleDateFormat;
    import java.util.Calendar;
    import java.util.Date;
    import java.util.Map;
    
    /**
     * @Author: chenJY
     * @Description: 获取前一天凌晨和今天凌晨的时间戳，返回字符串形式
     * @Date: 2022-08-12 9:24
     */
    public class DateUtil {
        
        /**
         * @Description 获取前一天凌晨时间戳
         * @author chenJY
         * @date 2022/8/12 9:25
         * @return String
        */
        public static String getStartTimestamp() {
        
            Calendar calendar = Calendar.getInstance();
            calendar.setTime(new Date());
            calendar.set(Calendar.HOUR_OF_DAY, 0);
            calendar.set(Calendar.MINUTE, 0);
            calendar.set(Calendar.SECOND, 0);
            calendar.add(Calendar.DAY_OF_MONTH, -1);
            Date start = calendar.getTime();
            Timestamp timestamp = new Timestamp(start.getTime());
            return timestamp.toString().substring(0,19);
        }
    
        /**
         * @Description 获取今日凌晨时间戳
         * @author chenJY
         * @date 2022/8/12 9:27
         * @return String
        */
        public static String getEndTimestamp() {
        
            Calendar calendar = Calendar.getInstance();
            calendar.setTime(new Date());
            calendar.set(Calendar.HOUR_OF_DAY, 0);
            calendar.set(Calendar.MINUTE, 0);
            calendar.set(Calendar.SECOND, 0);
            Date start = calendar.getTime();
            /*获取时间戳，并返回字符串格式时间
            Timestamp timestamp = new Timestamp(start.getTime());
            return timestamp.toString().substring(0,19);
            */
    
            // SimpleDateFormat.format格式化时间，并返回字符串格式
            SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
            return dateFormat.format(start).toString();
        }
    
    /*测试main方法
        public static void main(String[] args) {
            String yesterday = DateUtil.getStartTimestamp();
            String today = DateUtil.getEndTimestamp();
        }*/
    }