时间戳&date&String转化工具

package com.xc.utils;import java.sql.Timestamp;import java.text.DateFormat;import java.text.ParseException;import java.text.SimpleDateFormat;import java.util.Date;import java.util.Locale;import org.apache.commons.lang.StringUtils; /** * 时间转化工具 date转为时间戳 时间戳转date 互相与String的转换  * 所有出现的String time 格式都必须为(yyyy-MM-dd HH:mm:ss)，否则出错 * @author GuoMing *  */public class TimeExchange {     /**     * String(yyyy-MM-dd HH:mm:ss) 转 Date     */    public static Date StringToDate(String time) throws ParseException {             if(StringUtils.equals(time, "") || time == null)    return null;        Date date = new Date();        // 注意format的格式要与日期String的格式相匹配        DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");        try {            date = dateFormat.parse(time);        } catch (Exception e) {            e.printStackTrace();        }         return date;    }     /**     * Date转为String(yyyy-MM-dd HH:mm:ss)     *      * @param time     * @return     */    public static String DateToString(Date time) {        String dateStr = "";        Date date = new Date();        DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH/mm/ss");        try {            dateStr = dateFormat.format(time);            System.out.println(dateStr);        } catch (Exception e) {            e.printStackTrace();        }        return dateStr;    }    public static String DateToStringSimple(Date time) {        String dateStr = "";        Date date = new Date();        DateFormat dateFormat = new SimpleDateFormat("yyyyMMddHHmmss");        try {            dateStr = dateFormat.format(time);            System.out.println(dateStr);        } catch (Exception e) {            e.printStackTrace();        }        return dateStr;    }    /**     * String(yyyy-MM-dd HH:mm:ss)转10位时间戳     * @param time     * @return     */    public static Integer StringToTimestamp(String time){            int times = 0;        try {              times = (int) ((Timestamp.valueOf(time).getTime())/1000);          } catch (Exception e) {              e.printStackTrace();          }        if(times==0){            System.out.println("String转10位时间戳失败");        }        return times;              }    /**     * 10位int型的时间戳转换为String(yyyy-MM-dd HH:mm:ss)     * @param time     * @return     */    public static String timestampToString(Integer time){        //int转long时，先进行转型再进行计算，否则会是计算结束后在转型        long temp = (long)time*1000;        Timestamp ts = new Timestamp(temp);          String tsStr = "";          DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");          try {              //方法一              tsStr = dateFormat.format(ts);              System.out.println(tsStr);          } catch (Exception e) {              e.printStackTrace();          }        return tsStr;      }    /**     * 10位时间戳转Date     * @param time     * @return     */    public static Date TimestampToDate(Integer time){        long temp = (long)time*1000;        Timestamp ts = new Timestamp(temp);          Date date = new Date();          try {              date = ts;              //System.out.println(date);          } catch (Exception e) {              e.printStackTrace();          }          return date;    }    /**     * Date类型转换为10位时间戳     * @param time     * @return     */    public static Integer DateToTimestamp(Date time){        Timestamp ts = new Timestamp(time.getTime());                 return (int) ((ts.getTime())/1000);    }            /**     *      */    public static int getCurrentTimestamp(){    return (int) (System.currentTimeMillis() / 1000);    }    public static String getCurrentString(){DateFormat dateFormat = new SimpleDateFormat("yyyyMMdd");return dateFormat.format(new Date());}        public static Date getDate(String str) {SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");SimpleDateFormat sdf2 = new SimpleDateFormat("yyyy-MM-dd HH:mm");SimpleDateFormat sdf3 = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");Date date = null;try {date = sdf.parse(str);} catch (Exception e) {try {date = sdf2.parse(str);} catch (ParseException e1) {try {date = sdf3.parse(str);} catch (ParseException e2) {}}}return date;}public static String getDate(long l) {SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss", Locale.getDefault());String str = sdf.format(new Date(l));return str;}
/** * 用于月份充值时满一年，年份加1 判断 * 传入2017年9月,4 返回 2018年1月 * @Description  * @author GuoMing * @date 2017年6月15日 下午1:50:39  * @param now * @param apiTime */public static Date getAddMonthDate(Date now, int monthNum) {Date newDate=now;int year=now.getYear();int month=now.getMonth();if(monthNum+month>=12){year+=1;month=monthNum+month-12;}else{month=monthNum+month;}newDate.setMonth(month);newDate.setYear(year);return newDate;}//返回当前日期的前m个月1号 日期public static String beforeMonth(int m){Date d=new Date();int year=d.getYear();int month=d.getMonth();if((month-m)==0){year=year-1;month=12;}else if((month-m)<0){month=month-m+12;year=year-1;}else{month=month-m;}Date date=new Date(year,month,1);SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss", Locale.getDefault());String str = sdf.format(date);return str;}

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