Java时间类型非常的差，首先版本问题，本人使用java在Android平台开发。很多Data类的方法已经不提倡使用，一个时间，居然要使用Calendar、DateFormat等类共同编码，非常麻烦。而且很多支持不足，比如时间加减，比如获取时间的日期而时分秒置0等，而C#的时间类实现的就非常方便。
public class DateUtil {
public static Date getDate(Date date){
Date dt = null;
Calendar calendar = Calendar.getInstance();
calendar.setTime(date);
calendar.set(Calendar.HOUR_OF_DAY, 0);
calendar.set(Calendar.MINUTE, 0);
calendar.set(Calendar.SECOND, 0);
calendar.set(Calendar.MILLISECOND, 0);
calendar.add(Calendar.DAY_OF_MONTH, 1);
dt = calendar.getTime();
return dt;
}
public static String getDateString(Date date){
String sDate = "";
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
Date dt = getDate(date);
sDate = sdf.format(dt);
return sDate;
}
public static long getDateLong(Date date){
long lDate = 0;
Date dt = getDate(date);
lDate = dt.getTime();
return lDate;
}
public static long getDateTimeLong(Date date){
long lDate = 0;
lDate = date.getTime();
return lDate;
}
public static String getString(Date date, String format){
String sDate ="";
SimpleDateFormat sdf = new SimpleDateFormat(format);
sDate = sdf.format(date);
return sDate;
}
public static long getString(String dateTime, String format){
long lDate = 0;
SimpleDateFormat sdf = new SimpleDateFormat(format);
try {
Date date = sdf.parse(dateTime);
lDate = date.getTime();
} catch (ParseException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return lDate;
}
public static String getString(long tm, String format){
String sDate="";
Date date = DateUtil.putDateTime(tm);
SimpleDateFormat sdf = new SimpleDateFormat(format);
sDate = sdf.format(date);
return sDate;
}
public static Date putDateTime(long time){
Date date = null;
date = new Date(time);
return date;
}
public static Date putDate(long time){
Date date = null;
date = new Date(time);
date = getDate(date);
return date;
}
public static Date putDateTime(String dtString, String format){
Date date = null;
SimpleDateFormat sdf = new SimpleDateFormat(format);
try {
date = sdf.parse(dtString);
} catch (ParseException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return date;
}
public static Date AddYear(Date date, int y){
Date dt = null;
Calendar calendar = Calendar.getInstance();
calendar.setTime(date);
calendar.add(Calendar.YEAR, y);
dt = calendar.getTime();
return dt;
}
public static Date AddMonth(Date date, int m){
Date dt = null;
Calendar calendar = Calendar.getInstance();
calendar.setTime(date);
calendar.add(Calendar.MONTH, m);
dt = calendar.getTime();
return dt;
}
public static Date AddDay(Date date, int d){
Date dt = null;
Calendar calendar = Calendar.getInstance();
calendar.setTime(date);
calendar.add(Calendar.DAY_OF_MONTH, d);
dt = calendar.getTime();
return dt;
}
public static Date AddHour(Date date, int h){
Date dt = null;
Calendar calendar = Calendar.getInstance();
calendar.setTime(date);
calendar.add(Calendar.HOUR_OF_DAY, h);
dt = calendar.getTime();
return dt;
}
public static Date AddMinute(Date date, int m){
Date dt = null;
Calendar calendar = Calendar.getInstance();
calendar.setTime(date);
calendar.add(Calendar.MINUTE, m);
dt = calendar.getTime();
return dt;
}
public static Date AddSecond(Date date, int s){
Date dt = null;
Calendar calendar = Calendar.getInstance();
calendar.setTime(date);
calendar.add(Calendar.SECOND, s);
dt = calendar.getTime();
return dt;
}
public static Date Add(Date date, int millisecond){
Date dt = null;
Calendar calendar = Calendar.getInstance();
calendar.setTime(date);
calendar.add(Calendar.MILLISECOND, millisecond);
dt = calendar.getTime();
return dt;
}
public static long Subtrat(Date date1, Date date2){
long l = 0;
l = date1.getTime() - date2.getTime();
return l;
}
}