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;
}
}个人常用网址收藏管理——666导航网
