用java获取系统的时间 :
String date=new java.text.SimpleDateFormat("yyyy-MM-dd hh:mm:ss").format(new java.util.Date());
但是我后来发现这样的得到是12小时制得
比如:
2011-10-07 12:10:33
2011-10-07 01:30:44
其实这里的2011-10-07 01:30:44是下午13:30
请问给位如何得到24小时制得
即
2011-10-07 01:30:44应该是:
2011-10-07 13:30:44
String date=new java.text.SimpleDateFormat("yyyy-MM-dd hh:mm:ss").format(new java.util.Date());
但是我后来发现这样的得到是12小时制得
比如:
2011-10-07 12:10:33
2011-10-07 01:30:44
其实这里的2011-10-07 01:30:44是下午13:30
请问给位如何得到24小时制得
即
2011-10-07 01:30:44应该是:
2011-10-07 13:30:44
import java.io.InputStreamReader;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;public class GetCurrentTime {
static void useDate() {
Date date = new Date();
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.SSS");
System.out.println(sdf.format(date));
}
static void useCalendar() {
Calendar ca = Calendar.getInstance();
//System.out.println(ca);
int year = ca.get(Calendar.YEAR);//获取年份
int month = ca.get(Calendar.MONTH);//获取月份,从0-11开始
int day = ca.get(Calendar.DATE);//获取天数
int minute = ca.get(Calendar.MINUTE);//获取分钟
int hour = ca.get(Calendar.HOUR);//获取小时
int second = ca.get(Calendar.SECOND);//获取秒书
int WeekOfYear = ca.get(Calendar.DAY_OF_WEEK);//获取一周的第几天 System.out.println("Date = " + ca.getTime());
System.out.printf("年 = %5d , 月 = %5d , 日 = %5d %n", year, month + 1,
day);
System.out.printf("时 = %5d , 分 = %5d , 秒 = %5d %n", hour, minute,
second);
System.out.println("WeekOfYear = " + WeekOfYear);//
} static void useDosCommand() {
String ls_1;
Process process;
try {
process = Runtime.getRuntime().exec("cmd /c echo %date% %time% ");
BufferedReader bufferedReader = new BufferedReader(
new InputStreamReader(process.getInputStream()));
while ((ls_1 = bufferedReader.readLine()) != null)
System.out.println(ls_1);
process.waitFor();
} catch (Exception e) {
e.printStackTrace();
} }
public static void main(String[] args) {
System.out.println("*************方式1****************");
useDate();
System.out.println("*************方式2****************");
useCalendar();
System.out.println("*************方式3****************");
useDosCommand();
}
}
/*
*************方式1****************
2011-10-07 13:45:39.328
*************方式2****************
Date = Fri Oct 07 13:45:39 CST 2011
年 = 2011 , 月 = 10 , 日 = 7
时 = 1 , 分 = 45 , 秒 = 39
WeekOfYear = 6
*************方式3****************
2011-10-07 星期五 13:45:39.37
*/
c.setTime(new Date());
c.get(Calendar.HOUR);
System.out.println(c.getTime().toString());
c.get(Calendar.HOUR_OF_DAY);
System.out.println(c.getTime().toString());