Java Date gets date and time seconds

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packagecom.util;importjava.text.DateFormat;importjava.util.Calendar;importjava.util.Date;publicclassTest {    publicvoidgetTimeByDate(){        Date date = newDate();        DateFormat df1 = DateFormat.getDateInstance();//日期格式，精确到日        System.out.println(df1.format(date));        DateFormat df2 = DateFormat.getDateTimeInstance();//可以精确到时分秒        System.out.println(df2.format(date));        DateFormat df3 = DateFormat.getTimeInstance();//只显示出时分秒        System.out.println(df3.format(date));        DateFormat df4 = DateFormat.getDateTimeInstance(DateFormat.FULL,DateFormat.FULL); //显示日期，周，上下午，时间（精确到秒）        System.out.println(df4.format(date));         DateFormat df5 = DateFormat.getDateTimeInstance(DateFormat.LONG,DateFormat.LONG); //显示日期,上下午，时间（精确到秒）        System.out.println(df5.format(date));        DateFormat df6 = DateFormat.getDateTimeInstance(DateFormat.SHORT,DateFormat.SHORT); //显示日期，上下午,时间（精确到分）        System.out.println(df6.format(date));        DateFormat df7 = DateFormat.getDateTimeInstance(DateFormat.MEDIUM,DateFormat.MEDIUM); //显示日期，时间（精确到分）        System.out.println(df7.format(date));    }    public voidgetTimeByCalendar(){        Calendar cal = Calendar.getInstance();        intyear = cal.get(Calendar.YEAR);//获取年份        intmonth=cal.get(Calendar.MONTH);//获取月份        intday=cal.get(Calendar.DATE);//获取日        inthour=cal.get(Calendar.HOUR);//小时        intminute=cal.get(Calendar.MINUTE);//分                   int second=cal.get(Calendar.SECOND);//秒        intWeekOfYear = cal.get(Calendar.DAY_OF_WEEK);//一周的第几天        System.out.println("现在的时间是：公元"+year+"年"+month+"月"+day+"日      "+hour+"时"+minute+"分"+second+"秒       星期"+WeekOfYear);    }    publicstaticvoidmain(String[] args) {        Test t=newTest();        t.getTimeByDate();        System.out.println("****************************");        t.getTimeByCalendar();    }}

　　

Get day, if greater than 16 + 2 months, otherwise + 1 months, output 7 months

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publicstaticvoidmain(String[] as) throwsException {    intj;    Calendar cc = Calendar.getInstance();    intmyYear = cc.get(Calendar.YEAR);    intmyMonth = cc.get(Calendar.MONTH);    j=cc.get(Calendar.DATE)>16?3:2;    cc.set(Calendar.MONTH, myMonth+j);    System.out.println(myYear+"-"+cc.get(cc.MONTH));    for(inti=0;i<7;i++){        cc.add(cc.MONTH, 1);        intmm = cc.get(cc.MONTH);        intmmm=mm==0?12:mm;        System.out.println(myYear+"-"+mmm);    }}

　　

Here is a blog http://www.blogjava.net/xiaoyi/articles/295044.html, there are some common methods of implementation, you can refer to the optimization of their own

 

Java Date gets date and time seconds