java 时间字符串转Date Data转时间字符串

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

/**
 * @description:
 * @projectName:({PROJECT_NAME}
 * @see:{PACKAGE_NAME}
 * @author:fb
 * @createTime:2021/12/1 10:58
 * @version:1.0
 */
public class Test20211201 {
  public static void main(String[] args) throws ParseException {
    SimpleDateFormat formatter1 = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
    SimpleDateFormat formatter2 = new SimpleDateFormat("yyyy-MM-dd");

    System.out.println(formatter2.format(new Date()));

    System.out.println(formatter2.format(formatter1.parse("2021-11-05 18:18:20")));
  }
}