[Java]时间工具类

package com.construn.userservice.util;

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

/**
 * Created with IntelliJ IDEA.
 *
 * @author: chaosgod
 * @Date: 2017/10/24 0024  on  10:20
 * <p>
 * 时间戳的转换
 */
public class getSimpledateTime {
    public static void main(String[] args) {
        System.out.println(getSimpledateTime());
    }

    /**
     * 得实时时间
     *
     * @return
     */
    public static String getSimpledateTime() {
        Date date = new Date();
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        String currentTime = sdf.format(date);
        return currentTime;
    }

    /**
     * 得现在时间20171207091950
     *
     * @return
     */
    public static String getNowTIme() {
        Date date = new Date();
        SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMddHHmmss");
        String currentTime = sdf.format(date);
        return currentTime;
    }

    /**
     * 时间戳转时间
     *
     * @param s
     * @return
     */
    public static String stampToDate(String s) {
        String res;
        SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        long lt = new Long(s);
        Date date = new Date(lt);
        res = simpleDateFormat.format(date);
        return res;
    }

    /**
     * 时间转时间戳
     *
     * @param s
     * @return
     */
    public static long getTime(String s) {
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        Date dt = new Date();
        try {
            dt = sdf.parse(s);
        } catch (ParseException e) {

            e.printStackTrace();
        }//先有string转化为date，
        return dt.getTime();//再有date转化为时间戳
    }


}