时间段去重复合并

 /**
     * 合并时间段去掉重复的
     *
     * 时间合并 12：00：00----13：00：00   &  12：30：00 --- 14：00：00  =====》 12：00：00----14：00：00
     * @param usertime
     */
    public static void unionTime(List<UserTime> usertime){
        //顺序timesixth在最后，不可以改其他的可以改
        /*List<UserTime> usertime = new ArrayList<UserTime>();
        SimpleDateFormat sdf=new SimpleDateFormat("HH:mm");
        UserTime ut = new UserTime(1, sdf.parse("12:00"), sdf.parse("13:00"));
        UserTime ut2 = new UserTime(1, sdf.parse("12:30"), sdf.parse("15:00"));
        UserTime ut3 = new UserTime(1, sdf.parse("16:00"), sdf.parse("19:00"));
        usertime.add(ut);
        usertime.add(ut2);
        usertime.add(ut3);*/

        timesixth(usertime);
    }



    private static void timesixth(List<UserTime> usertime) {
        for(int i=0;i<usertime.size()-1;i++){
            int j=i+1;
            if(usertime.get(i).getUserid()==usertime.get(j).getUserid()){
                if(usertime.get(i).getEnd().after(usertime.get(j).getStart())
                        && usertime.get(i).getStart().before(usertime.get(j).getStart())
                        &&usertime.get(i).getEnd().before(usertime.get(j).getEnd())
                       ){
                    // |-----------|
                    //          |---------|
                    usertime.get(j).setStart(usertime.get(i).getStart());
                    usertime.remove(i);
                    timesixth(usertime);
                }else if(usertime.get(i).getEnd().equals(usertime.get(j).getStart())) {
                    // |------|
                    //        |-----|
                    usertime.get(j).setStart(usertime.get(i).getStart());
                    usertime.remove(i);
                    timesixth(usertime);
                }else if(usertime.get(i).getStart().before(usertime.get(j).getStart())
                        &&usertime.get(i).getEnd().equals(usertime.get(j).getEnd())
                ){
                    //     |----------|    结尾相等
                    //        |-------|
                    usertime.remove(j);

                    timesixth(usertime);
                }else if(usertime.get(i).getStart().after(usertime.get(j).getStart())
                        &&usertime.get(i).getEnd().equals(usertime.get(j).getEnd())){
                    //          |-----|    结尾相等
                    //        |-------|
                    usertime.remove(i);
                }else if(usertime.get(i).getStart().equals(usertime.get(j).getStart())
                        &&usertime.get(i).getEnd().before(usertime.get(j).getEnd())){
                    // |------------|
                    // |--------------|
                    usertime.remove(i);
                    timesixth(usertime);
                }else if(usertime.get(i).getStart().equals(usertime.get(j).getStart())
                        &&usertime.get(i).getEnd().after(usertime.get(j).getEnd())){
                    // |------------|
                    // |----------|
                    usertime.remove(j);
                    timesixth(usertime);
                }else if(usertime.get(i).getStart().equals(usertime.get(j).getStart())&&usertime.get(i).getEnd().equals(usertime.get(j).getEnd())){
                    // |----------|
                    // |----------|
                    usertime.remove(i);
                    timesixth(usertime);
                }else if(usertime.get(i).getStart().before(usertime.get(j).getStart())
                        &&usertime.get(i).getEnd().after(usertime.get(j).getStart())
                        && usertime.get(i).getStart().before(usertime.get(j).getEnd())
                        &&usertime.get(i).getEnd().after(usertime.get(j).getEnd())){
                    //     |----------|
                    //      |-------|
                    usertime.remove(j);

                    timesixth(usertime);
                }else if(usertime.get(i).getStart().after(usertime.get(j).getStart())
                        && usertime.get(i).getEnd().before(usertime.get(j).getEnd())
                ){
                    //            |------|
                    //          |---------|
                    usertime.remove(i);
                    timesixth(usertime);
                }else{

                }
                 /*  if(usertime.get(i).getEnd().before(usertime.get(i).getStart())){
                    // |--------|
                    //            |-------|
                    //不可以动
                }*/

            }
        }
    }

    public static class UserTime implements Comparable<UserTime>{
        public int userid;//用户ID
        public String title;//这个是在full calendar插件使用的时候用到，可以忽略
        public Date start;//开始时间
        public Date end;//结束时间
        public UserTime(int userid, Date begintime, Date endtime,String title){
            this.userid=userid;
            this.start=begintime;
            this.end=endtime;
            this.title=title;
        }

        @Override
        public int compareTo(UserTime o) {
            //先用用户ID排序，最后用时间
            if(this.userid!=o.userid)
                return this.userid-o.userid;
            else{
                if(this.start.before(o.end))
                    return -1;
                else
                    return 1;
            }
        }

        public String getTitle() {
            return title;
        }

        public void setTitle(String title) {
            this.title = title;
        }

        public int getUserid() {
            return userid;
        }

        public void setUserid(int userid) {
            this.userid = userid;
        }

        public Date getStart() {
            return start;
        }

        public void setStart(Date begintime) {
            this.start = begintime;
        }

        public Date getEnd() {
            return end;
        }

        public void setEnd(Date endtime) {
            this.end = endtime;
        }

    }