我不清楚您的要求.但是，如果您正在寻找一种将日期转换成各种格式的方法，则下面是一个示例:

I could not get your requirement clearly. However, if you are looking for a way to convert a date into various formats, given below is an example:

import java.time.LocalDate;
import java.time.format.DateTimeFormatter;

public class DateFormatsDemo {
    public static void main(String[] args) {

        //Convert date to date string in the format MM/dd/yyyy
        DateTimeFormatter farmatter = DateTimeFormatter.ofPattern("MM/dd/yyyy");
        LocalDate localDate = LocalDate.now();  
        String dateString = farmatter.format(localDate);         
        System.out.println(dateString);   

        //Convert date string in one format (MM/dd/yyyy) into date string in another format (MM-dd-yyyy)
        DateTimeFormatter formatter = DateTimeFormatter.ofPattern("MM/dd/yyyy");
        localDate= LocalDate.parse(dateString, formatter);
        farmatter = DateTimeFormatter.ofPattern("MM-dd-yyyy");
        dateString = farmatter.format(localDate);        
        System.out.println(dateString);         
    }
}

如果您希望使用Java使用MS-Excel，则可以使用 Apache POI .

If you are looking to work with MS-Excel using Java, you can use Apache POI.