LocalDateTime与时间戳与String的互换

import org.apache.tomcat.jni.Local;

import java.text.DateFormat;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.ZoneOffset;
import java.time.format.DateTimeFormatter;
import java.time.temporal.TemporalAccessor;

/**
* @QY
* @Date 2020/4/29
* @Version 1.0
*/
public class LocalDateTimeUtil {

private final static String DATE_PARSE_HOUR = "yyyy-MM-dd HH:mm:ss";
private final static String ZONE_OFFSET = "+8";

public static long localDateTime2TimeStamp(LocalDateTime localDateTime) {
return localDateTime.toEpochSecond(ZoneOffset.of(ZONE_OFFSET));
}

public static LocalDateTime timeStamp2LocalDateTime(long timeStamp) {
return LocalDateTime.ofEpochSecond(timeStamp, 0, ZoneOffset.of(ZONE_OFFSET));
}

public static String localDateTime2String(LocalDateTime localDateTime) {
DateTimeFormatter dtf = DateTimeFormatter.ofPattern(DATE_PARSE_HOUR);
return dtf.format(localDateTime);
}

public static LocalDateTime string2LocalDateTime(String date) {
DateTimeFormatter dtf = DateTimeFormatter.ofPattern(DATE_PARSE_HOUR);
return LocalDateTime.parse(date, dtf);
}

public static Long string2TimeStamp(String date) {
LocalDateTime localDateTime = string2LocalDateTime(date);
return localDateTime2TimeStamp(localDateTime);
}

public static String timeStamp2String(long timeStamp) {
LocalDateTime localDateTime = timeStamp2LocalDateTime(timeStamp);
return localDateTime2String(localDateTime);
}

public static void main(String[] args) {
LocalDateTime localDateTime = LocalDateTimeUtil.string2LocalDateTime("2020-04-29 16:30:30");
System.out.println("字符串转localDateTime对象 ---> " + localDateTime);
String time2String = LocalDateTimeUtil.localDateTime2String(localDateTime);
System.out.println("localDateTime转字符串对象 ---> " + time2String);
long timeStamp = LocalDateTimeUtil.localDateTime2TimeStamp(localDateTime);
System.out.println("localDateTime转时间戳 ---> " + timeStamp);
LocalDateTime localDateTimeBack = LocalDateTimeUtil.timeStamp2LocalDateTime(timeStamp);
System.out.println("时间戳转localDateTime --> " + localDateTimeBack);
String timeStamp2String = LocalDateTimeUtil.timeStamp2String(timeStamp);
System.out.println("时间戳转字符串 ---> " + timeStamp2String);
Long stamp = LocalDateTimeUtil.string2TimeStamp(timeStamp2String);
System.out.println("字符串转时间戳 ---> " + stamp);
}
}

输出结果：

字符串转localDateTime对象 ---> 2020-04-29T16:30:30
localDateTime转字符串对象 ---> 2020-04-29 16:30:30
localDateTime转时间戳 ---> 1588149030
时间戳转localDateTime --> 2020-04-29T16:30:30
时间戳转字符串 ---> 2020-04-29 16:30:30
字符串转时间戳 ---> 1588149030