Spring如何关闭Hibernate的数据库连接

public static List<Map<String, Object>> initDate(int dayOfago, String dbkey, String dbName)
{
List<Map<String, Object>> dateList = new ArrayList<Map<String, Object>>();

Map<String, Object> dateMap = new HashMap<String, Object>();
dateMap.put(dbkey, "");
dateMap.put(dbName, "所有");
dateList.add(dateMap);
for (int i = 0; i < dayOfago; i++)
{
dateMap = new HashMap<String, Object>();
dateMap.put(dbkey, formatDate(i));
if (i == 0)
{
dateMap.put(dbName, "今天");
dateList.add(dateMap);
continue;
}
if (i == 1)
{
dateMap.put(dbName, "昨天");
dateList.add(dateMap);
continue;
}
if (i == 2)
{
dateMap.put(dbName, "前天");
dateList.add(dateMap);
continue;
}
String showTime = getWeekStr(formatDate(i));
dateMap.put(dbName, showTime);
dateList.add(dateMap);
}
return dateList;
}

public static String formatDate(int i)
{
Calendar calendar = Calendar.getInstance();
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
calendar.add(Calendar.DAY_OF_YEAR, -i);
Date date = calendar.getTime();
return sdf.format(date);
}

public static String getWeekStr(String sdate)
{
String str = "";
str = getWeek(sdate);
if ("1".equals(str))
{
str = "星期日";
}
else if ("2".equals(str))
{
str = "星期一";
}
else if ("3".equals(str))
{
str = "星期二";
}
else if ("4".equals(str))
{
str = "星期三";
}
else if ("5".equals(str))
{
str = "星期四";
}
else if ("6".equals(str))
{
str = "星期五";
}
else if ("7".equals(str))
{
str = "星期六";
}

return sdate + "  " + str;
}

public static String getWeek(String sdate)
{
Date date = strToDate(sdate);
Calendar c = Calendar.getInstance();
c.setTime(date);
return new SimpleDateFormat("EEEE").format(c.getTime());
}

public static Date strToDate(String strDate)
{
SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd");
Date strtodate = null;
try
{
strtodate = formatter.parse(strDate);
}
catch (ParseException e)
{
e.printStackTrace();
}
return strtodate;
}