需求是這樣的,從數據庫查到課程的開始和結束時間然後根據周來劃分,先初步劃分出時間
主要代碼
public List<HmScheduleTest> selectCourseSchedule(){
List<HmScheduleTest> list=new ArrayList<HmScheduleTest>();
//根據教練或天使老師查詢出課程id
//未寫...
//根據課程ID查詢課程信息
String id="0ae00bcc-eb0c-4495-88ae-be30e40eff6e";
HmCourseCase hmCourseCase = hmCourseCaseMapper.selectByPrimaryKey(id);
SimpleDateFormat format=new SimpleDateFormat("yyyy-MM-dd HH:mm:ss" );
//判斷開始日期是周幾
//開始時間
Calendar c= Calendar.getInstance();
c.setTime(hmCourseCase.getBeginTime());//開始時間
//結束時間
Calendar d= Calendar.getInstance();
d.setTime(hmCourseCase.getEndTime());//結束時間
//計算開始時間爲周幾
int dayForWeek=0 ;//開始時間爲周幾
if (c.get(Calendar.DAY_OF_WEEK)==1 ){
dayForWeek=7 ;
}else {
dayForWeek=c.get(Calendar.DAY_OF_WEEK)-1;
}
//計算結束時間爲周幾
int dayEndWeek=0 ;//結束時間爲周幾
if (d.get(Calendar.DAY_OF_WEEK)==1 ){
dayEndWeek=7 ;
}else {
dayEndWeek=d.get(Calendar.DAY_OF_WEEK)-1;
}
Date start=c.getTime();
Date end=d.getTime();
String aa=format.format(start);
//計算兩個時間之間相差多少天
long startDay = c.getTime().getTime();//把時間轉換爲毫秒
long endDay = d.getTime().getTime();//把時間轉換爲毫秒
long days=(endDay-startDay)/86400000;//相差天數 86400000:一天時間的毫秒數
long days2=days+dayForWeek+(7-dayEndWeek);
long weeks=days2/7;//計算出一共分幾周
long oneWeeksEnd=0;
for (int i=1;i<=weeks;i++){
if(i==1){//判斷當前爲第一週時
//第一週
// startDay 開始時間 然後再轉化爲yyyy-mm-dd HH:mm:ss
String beginweeks=format.format(start);//第一週開始時間
//計算本週結束時間
oneWeeksEnd=startDay+(7-dayForWeek)*86400000;//得到毫秒數
Calendar calendar = Calendar.getInstance();
calendar.setTimeInMillis(oneWeeksEnd);//Date日期
//結束時間
String endweeks=format.format(oneWeeksEnd);//轉化爲yyyy-mm-dd HH:mm:ss
//根據本週開始時間和結束時間查詢電話數和作業數
HmScheduleTest hmScheduleTest=new HmScheduleTest(i,beginweeks,endweeks);
list.add(hmScheduleTest);
}else if (i==weeks){//判斷當前爲最後一週時
long beginweeksMill=oneWeeksEnd+86400000+(i-2)*7*86400000;//當前周開始時間
Calendar calendarbegin = Calendar.getInstance();
calendarbegin.setTimeInMillis(beginweeksMill);
Date datebegin= calendarbegin.getTime();
//當前周開始時間轉化爲yyyy-mm-dd HH:mm:ss
String beginweeks=format.format(datebegin);
long endweeksMill=beginweeksMill+(dayEndWeek-1)*86400000;
Calendar calendarend = Calendar.getInstance();
calendarend.setTimeInMillis(endweeksMill);
//當前周結束時間轉化爲yyyy-mm-dd HH:mm:ss
Date dateend= calendarend.getTime();
String endweeks=format.format(dateend);
HmScheduleTest hmScheduleTest=new HmScheduleTest(i,beginweeks,endweeks);
list.add(hmScheduleTest);
}else {
//long beginweeksMill=startDay+((7-dayForWeek)+(i-1)*7)*86400000;//當前周開始時間
long beginweeksMill=oneWeeksEnd+86400000+(i-2)*7*86400000;
Calendar calendarbegin = Calendar.getInstance();
calendarbegin.setTimeInMillis(beginweeksMill);
Date datebegin= calendarbegin.getTime();
//當前周開始時間轉化爲yyyy-mm-dd HH:mm:ss
String beginweeks=format.format(datebegin);
long endweeksMill=beginweeksMill+6*86400000;
Calendar calendarend = Calendar.getInstance();
calendarend.setTimeInMillis(endweeksMill);
//當前周結束時間轉化爲yyyy-mm-dd HH:mm:ss
Date dateend= calendarend.getTime();
String endweeks=format.format(dateend);
HmScheduleTest hmScheduleTest=new HmScheduleTest(i,beginweeks,endweeks);
list.add(hmScheduleTest);
}
}
return list;
時間是
最後返回的結果
