Java 日期字符串date与数字long之间的转换
public class SimpleDateUtil {
?
?// 短日期格式
?public static String DATE_FORMAT = "yyyy-MM-dd";
?
?// 长日期格式
?public static String TIME_FORMAT = "yyyy-MM-dd HH:mm:ss";
?
?/**
? * 将日期格式的字符串转换为长整型
? *
? * @param date
? * @param format
? * @return
? */
?public static long convert2long(String date, String format) {
??try {
???if (StringUtils.isNotBlank(date)) {
????if (StringUtils.isBlank(format))
?????format = SimpleDateUtil.TIME_FORMAT;
????SimpleDateFormat sf = new SimpleDateFormat(format);
????return sf.parse(date).getTime();
???}
??} catch (ParseException e) {
???e.printStackTrace();
??}
??return 0l;
?}
?
?/**
? * 将长整型数字转换为日期格式的字符串
? *
? * @param time
? * @param format
? * @return
? */
?public static String convert2String(long time, String format) {
??if (time > 0l) {
???if (StringUtils.isBlank(format))
????format = SimpleDateUtil.TIME_FORMAT;
???SimpleDateFormat sf = new SimpleDateFormat(format);
???Date date = new Date(time);
???return sf.format(date);
??}
??return "";
?}
?
?/**
? * 获取当前系统的日期
? *
? * @return
? */
?public static long curTimeMillis() {
??return System.currentTimeMillis();
?}
?
?/**
? * 示例函数
? *
? * @param args
? */
?public static void main(String[] args) {
??System.out.println(SimpleDateUtil.convert2long("2000-01-01 01:01:01",
????SimpleDateUtil.DATE_FORMAT));
??System.out.println(SimpleDateUtil.convert2String(SimpleDateUtil
????.curTimeMillis(), SimpleDateUtil.TIME_FORMAT));
??
?}
}
