2023-03-30 00:00:00.0(Timestamp), 2023-03-30 00:00:00.0(Timestamp) 怎么设置成2023-03-30:23:59:59

可以使用以下代码将时间戳的时间设置为23:59:59：

import java.sql.Timestamp;
import java.util.Calendar;

Timestamp timestamp1 = Timestamp.valueOf("2023-03-30 00:00:00.0");
Timestamp timestamp2 = Timestamp.valueOf("2023-03-30 00:00:00.0");

Calendar cal = Calendar.getInstance();
cal.setTime(timestamp1);
cal.set(Calendar.HOUR_OF_DAY, 23);
cal.set(Calendar.MINUTE, 59);
cal.set(Calendar.SECOND, 59);
timestamp1 = new Timestamp(cal.getTimeInMillis());

cal.setTime(timestamp2);
cal.set(Calendar.HOUR_OF_DAY, 23);
cal.set(Calendar.MINUTE, 59);
cal.set(Calendar.SECOND, 59);
timestamp2 = new Timestamp(cal.getTimeInMillis());

System.out.println(timestamp1);
System.out.println(timestamp2);

输出结果：

2023-03-30 23:59:59.0
2023-03-30 23:59:59.0