date和string转换用joda包

import org.joda.time.DateTime;
import org.joda.time.format.DateTimeFormat;
import org.joda.time.format.DateTimeFormatter;

import java.util.Date;

/**
 * Created by Administrator on 2019/3/25.
 */
public class datatimeutil {
    public static Date strtodate(String datetimestr, String formatestr){
        DateTimeFormatter dateTimeFormat= DateTimeFormat.forPattern(formatestr);
        DateTime dateTime=dateTimeFormat.parseDateTime(datetimestr);
        return dateTime.toDate();
    }
    public static String datetostr(Date date, String formatestr){
        if(date==null){
            return "";
        }
        DateTime dateTime=new DateTime(date);
        return dateTime.toString(formatestr);
    }
}