Servlet获取日期和时间 [英] Servlet get date and time
问题描述
我使用以下代码来获取日期和时间
I'm using the following code to get the date and time
public class offer extends HttpServlet {
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html;charset=UTF-8");
PrintWriter out = response.getWriter();
try {
out.println("<html>");
out.println("<head>");
out.println("<title>Servlet offer</title>");
out.println("</head>");
out.println("<body>");
out.println("<h1> sv sugar mills</h1>");
doPost(request,response);
out.println("</body>");
out.println("</html>");
} finally {
out.close();
}
}
@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html;charset=UTF-8");
PrintWriter out = response.getWriter();
java.sql.Date sqlDate=null,ofrmonth=null,ctime=null;
dat="14/02/2013";
try
{
java.util.Date date=new SimpleDateFormat("dd/MM/yyyy").parse(dat);
//ctime=new java.sql.Date(date.getTime());
sqlDate = new java.sql.Date(date.getTime());
out.println(sqlDate);
out.Println(ctime);
}
catch(Exception e)
{
out.println(e);
}
}
@Override
public String getServletInfo() {
return "Short description";
}// </editor-fold>
}
这里，util.Date变量日期显示为 Thu Feb 14 00:00:00 IST 2013。所以我把sql.Date容易地作为2013-02-14。另外，我想从中得到时间。在ctime变量中，我想得到时间并显示它。格式应为24小时格式。但我不知道如何得到它。
Here, the util.Date variable date is displayed as "Thu Feb 14 00:00:00 IST 2013". So I get the sql.Date easily as "2013-02-14". Also, I want to get the time from it. In the ctime variable I want to get the time and display it. The format should be 24hours format. But I don't know how to get it.
我使用过一些函数，如getHours（）和getDate（），但是我找不到解决方案。有人可以帮我取得时间吗感谢提前
I've used some functions like getHours() and getDate(), but I couldn't found the solution. Can someone help me to get the time. Thanks in advance
我需要时间为00:00:00（hh：mm：ss）
I need the time as 00:00:00 (hh:mm:ss)
推荐答案
尝试这样：
Calendar c = Calendar.getInstance();
c.setTime(sqlDate);
System.out.println(c.get(Calendar.HOUR));
System.out.println(c.get(Calendar.MINUTE));
System.out.println(c.get(Calendar.SECOND));
除非为日历设置时区对象上述返回时间在你的机器的时区。
Unless you set a time zone for the Calendar object the above returns time in your machine's time zone.
如果你想要一个单一的 String 的 HH：mm：ss 作为输出，您可以使用 SimpleDateFormat
And if you want a single String in the form of HH:mm:ss as output, you can use a SimpleDateFormat as pointed out by @zvzdhk.
片段：
SimpleDateFormat sdf = new SimpleDateFormat("HH:mm:ss");
sdf.setTimeZone(TimeZone.getTimeZone("IST"));
System.out.println(sdf.format(sqlDate));
请注意， TimeZone.getTimeZone 允许参数GMT + 5：30，PST等等阅读文档了解更多信息。
Note that TimeZone.getTimeZone allows argument like "GMT+5:30", "PST" etc. Read the documentation for more.
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