Java常用的工具类之时间类

男娘i 2023-03-04 11:25 17阅读 0赞

#### 1. 时间类的工具类 ####

###### 1.1 获取当前类型的yyyyMMddHHmmss格式字符串 ######

public static String getCurrentTime24() { 
            SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyyMMddHHmmss");//也可以是yyyyMMddHHmmssSSS
            return simpleDateFormat.format(new Date());
        }

###### 1.2 比较两个字符串时间大小 ######

public static long calcTwoTimesDiff(String largeTime, String smallTime) throws Exception { 
            SimpleDateFormat df = new SimpleDateFormat("yyyyMMddHHmmss");
            Date largeTimeD = df.parse(largeTime);
            Date smallTimeD = df.parse(smallTime);
            long twoTimesDiff = largeTimeD.getTime() - smallTimeD.getTime();
            return twoTimesDiff;
        }

###### 1.3 获取前一天日期 ######

public static String getLastdayOfTheDay(String settDate) throws Exception { 
            Calendar c = Calendar.getInstance();
            SimpleDateFormat df = new SimpleDateFormat("yyyyMMddHHmmss");
            Date d = df.parse(settDate + "000000");
            c.setTime(d);
            c.set(5, c.get(5) - 1);
            d = c.getTime();
            return df.format(d).substring(0, 8);
        }

###### 1.4 获取明天的日期 ######

public static String getNextdayOfTheDay(String settDate) throws Exception { 
            Calendar c = Calendar.getInstance();
            SimpleDateFormat df = new SimpleDateFormat("yyyyMMddHHmmss");
            Date d = df.parse(settDate + "000000");
            c.setTime(d);
            c.set(5, c.get(5) + 1);
            d = c.getTime();
            return df.format(d).substring(0, 8);
        }

###### 1.5 获取指定天数的日期 ######

public static String getSomeDayOfTheDay(String settDate, int somedays) throws Exception { 
            Calendar c = Calendar.getInstance();
            SimpleDateFormat df = new SimpleDateFormat("yyyyMMddHHmmss");
            Date d = df.parse(settDate + "000000");
            c.setTime(d);
            c.set(5, c.get(5) + somedays);
            d = c.getTime();
            return df.format(d).substring(0, 8);
        }

###### 1.6 获取某月最后一天 ######

public static String getFinalDayOfTheMoth(String day) throws Exception { 
            Calendar c = Calendar.getInstance();
            SimpleDateFormat df = new SimpleDateFormat("yyyyMMddHHmmss");
            Date d = df.parse(day + "000000");
            c.setTime(d);
            c.set(5, 1);
            c.roll(5, -1);
            d = c.getTime();
            return df.format(d).substring(0, 8);
        }