如何在java中将日期时间设置为一天结束

参考地址： 

How to set datetime to end of day in java - Stack Overflow

 
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
 
public class TestDate {
    public static void main(String[] args) throws ParseException {
        method1();
        method2();
        System.out.println(getDateEndDay(new Date()));
    }
 
    public static void method1() throws ParseException {
        Calendar cal = Calendar.getInstance();
        SimpleDateFormat sdf1 = new SimpleDateFormat("yyyy-MM-dd 00:00:00");
        SimpleDateFormat sdf2 = new SimpleDateFormat("yyyy-MM-dd 23:59:59");
        SimpleDateFormat sdf3 = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
 
        String str1 = sdf1.format(cal.getTime());
        String str2 = sdf2.format(cal.getTime());
 
        System.out.println(str1);
        System.out.println(str2);
 
        Date startDate = sdf3.parse(str1);
        System.out.println(startDate);
 
        Date endDate = sdf3.parse(str2);
        System.out.println(endDate);
 
 
    }
 
    public static void method2() throws ParseException {
        Calendar cal = Calendar.getInstance();
        cal.set(Calendar.HOUR_OF_DAY, 0);
        cal.set(Calendar.MINUTE, 0);
        cal.set(Calendar.SECOND, 0);
        cal.set(Calendar.MILLISECOND, 0);
        Date startDate = cal.getTime();
 
        cal.set(Calendar.HOUR_OF_DAY, 23);
        cal.set(Calendar.MINUTE, 59);
        cal.set(Calendar.SECOND, 59);
        cal.set(Calendar.MILLISECOND, 999);
        Date endDate = cal.getTime();
 
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        System.out.println(sdf.format(startDate));
        System.out.println(sdf.format(endDate));
    }
 
    private static Date getDateEndDay(Date date) {
        Calendar cal = Calendar.getInstance();
        cal.setTime(date);
        cal.set(Calendar.HOUR_OF_DAY, 23);
        cal.set(Calendar.MINUTE, 59);
        cal.set(Calendar.SECOND, 59);
        cal.set(Calendar.MILLISECOND, 999);
        return cal.getTime();
    }
}