使用Hutool DateUtils的一些注意事项

Hutool工具类 pom

<dependency>
    <groupId>cn.hutool</groupId>
    <artifactId>hutool-all</artifactId>
    <version>5.7.12</version>
</dependency>
           

public static void main(String[] args) {
        DateTime dateTime = new DateTime("2021-9-14 09:11:23", "yyyy-MM-dd HH:mm:ss");
        // 获取日期成员（年、季度、月、日）
        int year = dateTime.year();// 获取年 
        System.out.println("year = " + year);
        int month = dateTime.month();//获取 月份
        System.out.println("month = " + month);
        int dayOfWeek = dateTime.dayOfWeek();// 获取星期几
        System.out.println("dayOfWeek = " + dayOfWeek);
        int dayOfMonth = dateTime.dayOfMonth();// 获取在本月的第几天
        System.out.println("dayOfMonth = " + dayOfMonth);
        // 偏移日期
        DateTime dateTime1 = dateTime.offset(DateField.DAY_OF_MONTH, -1); //向前退一个月
        System.out.println(dateTime1.toString());
    }