Java8获取今天至未来某天的日期范围及格式化

爱被打了一巴掌 2023-10-11 15:14 30阅读 0赞

### 今天至未来某天的日期范围 ###

/**
         * 返回今天的日期最小值
         */
        public static LocalDateTime minDate(){
        
            LocalDate localDate = LocalDate.now();
            LocalTime localTime = LocalTime.MIN;
            LocalDateTime localDateTime = LocalDateTime.of(localDate, localTime);
            return localDateTime;
        }
    
        /**
         * 返回未来某天的日期最大值
         */
        public static LocalDateTime maxDateByDays(Integer day){
        
            LocalDate localDate = LocalDate.now().plusDays(day);
            LocalTime localTime = LocalTime.MAX;
            LocalDateTime localDateTime = LocalDateTime.of(localDate, localTime);
            return localDateTime;
        }

*  测试 【获取日期范围在2021-01-02-----2021-01-05之间的值】

public static void main(String[] args) {
        
            System.out.println(minDate());  // 2021-01-02T00:00
            System.out.println(maxDateByDays(3)); // 2021-01-05T23:59:59.999999999
        }

![在这里插入图片描述][20210102145849501.png]

### 将日期格式化 ###

/**
         * 返回今天的日期最小值
         */
        public static String minDateFormatted(){
        
            LocalDate localDate = LocalDate.now();
            LocalTime localTime = LocalTime.MIN;
            LocalDateTime localDateTime = LocalDateTime.of(localDate, localTime);
            String format = localDateTime.format(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss"));
            return format;
        }
    
          /**
         * 返回未来某天的日期最大值
         */
        public static String maxDateByDaysFormatted(Integer day){
        
            LocalDate localDate = LocalDate.now().plusDays(day);
            LocalTime localTime = LocalTime.MAX;
            LocalDateTime localDateTime = LocalDateTime.of(localDate, localTime);
            String format = localDateTime.format(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss"));
            return format;
        }

*  再次测试

public static void main(String[] args) {
        
           // System.out.println(minDate());  // 2021-01-02T00:00
           // System.out.println(maxDateByDays(3)); // 2021-01-05T23:59:59.999999999
    
            System.out.println(minDateFormatted()); //2021-01-02 00:00:00
            System.out.println(maxDateByDaysFormatted(6)); //2021-01-08 23:59:59
    
        }

![在这里插入图片描述][20210102150621905.png]

[20210102145849501.png]: https://img-blog.csdnimg.cn/20210102145849501.png
[20210102150621905.png]: https://img-blog.csdnimg.cn/20210102150621905.png