转换日期格式的工具类

import java.text.SimpleDateFormat;
import java.util.Date;

public class DateFormat {
    public static String convert(Date date) {
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
        String dateStr = sdf.format(date);
        return dateStr;
    }
}

import java.util.Date;

public class test {
      public static void main(String[] args) {
          Date date = new Date();
         System.out.println(DateFormat.convert(date)); 
    }
}