zoukankan      html  css  js  c++  java
  • 获取一天的开始时间和结束时间

    这是数据库中存放的是long类型的时间戳,将时间戳转换为Date类型后. 想要查询这一天中的数据:
        /**
         * @param args
         */
        public static void main(String[] args) {
            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();
    
            calendar.add(Calendar.DAY_OF_MONTH, 1);
            calendar.add(Calendar.SECOND, -1);
            
            Date end = calendar.getTime();
    
            System.out.println(start);
            System.out.println(end);
        }

    or:

        /**
         * @param args
         * @throws ParseException 
         */
        public static void main(String[] args) throws ParseException {
            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();
    
            calendar.add(Calendar.DAY_OF_MONTH, 1);
            calendar.add(Calendar.SECOND, -1);
            
            Date end = calendar.getTime();
    
            System.out.println(start);
            System.out.println(end);
            
            /* other way */
            SimpleDateFormat formater = new SimpleDateFormat("yyyy/MM/dd");
            SimpleDateFormat formater2 = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss");
            
            start = formater2.parse(formater.format(new Date())+ " 00:00:00");
            end = formater2.parse(formater.format(new Date())+ " 23:59:59");
            
            System.out.println(start);
            System.out.println(end);
        }
  • 相关阅读:
    判断url的正则表达式
    将Excel数据导入MySql
    需要记一下的
    java笔记
    禁用cookie后
    smarty框架块函数
    php Smarty date_format [格式化时间日期]
    mysql 笔记
    笔记 php.ini配置文件中magic_quotes_gpc, magic_quotes_runtime的作用是什么?应该开启还是关闭?
    php
  • 原文地址:https://www.cnblogs.com/vaer/p/4338102.html
Copyright © 2011-2022 走看看