根据网上材料进行归纳梳理,对常见的日期格式进行转换,直接上代码吧。
- import java.text.DateFormat;
- import java.text.ParseException;
- import java.text.SimpleDateFormat;
- import java.util.Date;
- public class DateParserT {
- /**
- * Date 与 String、long 的相互转换
- * @param args
- */
- public static void main(String[] args) {
- Date dt =new Date();
- System.out.println(dt); //格式: Wed Jul 06 09:28:19 CST 2016
- //格式:2016-7-6
- String formatDate = null;
- formatDate = DateFormat.getDateInstance().format(dt);
- System.out.println(formatDate);
- //格式:2016年7月6日 星期三
- formatDate = DateFormat.getDateInstance(DateFormat.FULL).format(dt);
- System.out.println(formatDate);
- //格式 24小时制:2016-07-06 09:39:58
- DateFormat dFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); //HH表示24小时制;
- formatDate = dFormat.format(dt);
- System.out.println(formatDate);
- //格式12小时制:2016-07-06 09:42:44
- DateFormat dFormat12 = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss"); //hh表示12小时制;
- formatDate = dFormat12.format(dt);
- System.out.println(formatDate);
- //格式去掉分隔符24小时制:20160706094533
- DateFormat dFormat3 = new SimpleDateFormat("yyyyMMddHHmmss");
- formatDate = dFormat3.format(dt);
- System.out.println(formatDate);
- //格式转成long型:1467770970
- long lTime = dt.getTime() / 1000;
- System.out.println(lTime);
- //格式long型转成Date型,再转成String: 1464710394 -> ltime2*1000 -> 2016-05-31 23:59:54
- long ltime2 = 1464710394;
- SimpleDateFormat lsdFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
- Date lDate = new Date(ltime2*1000);
- String lStrDate = lsdFormat.format(lDate);
- System.out.println(lStrDate);
- //格式String型转成Date型:2016-07-06 10:17:48 -> Wed Jul 06 10:17:48 CST 2016
- String strDate = "2016-07-06 10:17:48";
- SimpleDateFormat lsdStrFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
- try {
- Date strD = lsdStrFormat.parse(strDate);
- System.out.println(strD);
- } catch (ParseException e) {
- e.printStackTrace();
- }
- }
- }
========================================================================================================================================================================================================================================================================================================================================================================
public class timeDateUtils {
public static String getCurrentTime(){
Date currentTime = new Date();
SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
String datastring = dateFormat.format(currentTime);
//System.out.println(datastring);
String subdatastring = datastring.substring(0,15);
//System.out.println(subdatastring);
return subdatastring;
}
public static void main(String[] args) {
System.out.println(getCurrentTime());
}
public static String getMillsTime(){
Date currentTime = new Date();
// SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
// String datastring = dateFormat.format(currentTime);
// System.out.println(datastring);
// String subdatastring = datastring.substring(0,15);
// System.out.println(subdatastring);
// SimpleDateFormat dateFormat2 = new SimpleDateFormat("yyyyMMddHHmmss");
// SimpleDateFormat dateFormat2 = new SimpleDateFormat("HHmmss");
// SimpleDateFormat dateFormat2 = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss SSS");
SimpleDateFormat dateFormat2 = new SimpleDateFormat("ss SSS"); //只取秒和毫秒
String datastring2 = dateFormat2.format(currentTime);
//System.out.println(datastring2);
String onlyStr = datastring2.replace(" ", ""); //去掉里面的空格
String subStr = onlyStr.substring(1);
//System.out.println(subStr); //结算出多少毫秒
return subStr;
}
}
public static String getCurrentTime(){
Date currentTime = new Date();
SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
String datastring = dateFormat.format(currentTime);
//System.out.println(datastring);
String subdatastring = datastring.substring(0,15);
//System.out.println(subdatastring);
return subdatastring;
}
public static void main(String[] args) {
System.out.println(getCurrentTime());
}
public static String getMillsTime(){
Date currentTime = new Date();
// SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
// String datastring = dateFormat.format(currentTime);
// System.out.println(datastring);
// String subdatastring = datastring.substring(0,15);
// System.out.println(subdatastring);
// SimpleDateFormat dateFormat2 = new SimpleDateFormat("yyyyMMddHHmmss");
// SimpleDateFormat dateFormat2 = new SimpleDateFormat("HHmmss");
// SimpleDateFormat dateFormat2 = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss SSS");
SimpleDateFormat dateFormat2 = new SimpleDateFormat("ss SSS"); //只取秒和毫秒
String datastring2 = dateFormat2.format(currentTime);
//System.out.println(datastring2);
String onlyStr = datastring2.replace(" ", ""); //去掉里面的空格
String subStr = onlyStr.substring(1);
//System.out.println(subStr); //结算出多少毫秒
return subStr;
}
}