current_page = request.GET.get("page",1)  # 獲取用戶想訪問的頁碼  如果沒有 默認(rèn)展示第一頁
try:  # 由于后端接受到的前端數(shù)據(jù)是字符串類型所以我們這里做類型轉(zhuǎn)換處理加異常捕獲
  current_page = int(current_page)
except Exception as e:
  current_page = 1
# 還需要定義頁面到底展示幾條數(shù)據(jù)
per_page_num = 10  # 一頁展示10條數(shù)據(jù)

# 需要對(duì)總數(shù)據(jù)進(jìn)行切片操作 需要確定切片起始位置和終止位置
start_page = ? 
end_page = ?
"""
下面需要研究current_page、per_page_num、start_page、end_page四個(gè)參數(shù)之間的數(shù)據(jù)關(guān)系
per_page_num = 10
current_page                start_page                  end_page
    1                           0                           10
    2                           10                          20
    3                           20                          30  
    4                           30                          40

per_page_num = 5
current_page                start_page                  end_page
    1                           0                           5
    2                           5                           10
    3                           10                          15  
    4                           15                          20
可以很明顯的看出規(guī)律
start_page = (current_page - 1) * per_page_num
end_page =  current_page* per_page_num
"""

>>> divmod(100,10)
(10, 0)  # 10頁
>>> divmod(101,10)
(10, 1)  # 11頁
>>> divmod(99,10)
(9, 9)  # 10頁
# 余數(shù)只要不是0就需要在第一個(gè)數(shù)字上加一

后端自定義分頁器邏輯詳解：

def book(request):
    if request.method == 'GET':
        current_page = request.GET.get('page',1) # 獲取用戶需要訪問的頁面，如果沒有默認(rèn)返回1
    try:   #異常捕獲，因?yàn)榍岸朔祷氐亩际亲址?，需要把他們都轉(zhuǎn)成數(shù)字類型，方便下面做運(yùn)算操作
        current_page = int(current_page)
    except Exception as e:
        current_page = 1  # 用戶輸入啥字母等也默認(rèn)為1
    per_page_num = 10  #每頁展示多少條數(shù)據(jù)
    start_page = (current_page - 1) * per_page_num  #當(dāng)前頁數(shù)起始數(shù)據(jù)
    end_page = current_page * per_page_num  #當(dāng)前頁結(jié)束數(shù)據(jù)
    book_num = models.Book.objects.all() #將所有數(shù)據(jù)查詢出來
    all_count = book_num.count()  # 統(tǒng)計(jì)一共有多少數(shù)據(jù)
    num,more = divmod(all_count,per_page_num)  #divmod方法計(jì)算需要的總頁數(shù)
    if more:
        all_page = num + 1 #more為余數(shù)，余為0，則剛剛好是num頁數(shù)，不為0，則頁數(shù)加1
    # 然后我們需要在html頁面的分頁器標(biāo)簽部分，for循環(huán)一下總共需要的num頁數(shù)，但是有一個(gè)問題是，前端無法使用range()
    # 這就需要我們?cè)诤蠖诉M(jìn)行循環(huán)，再傳到前端
    html = ''
    a = current_page # 為了下面頁碼高亮調(diào)整
    if current_page <6:  #當(dāng)頁面小于6時(shí)，固定在6上面，為下面的for處理不出現(xiàn)頁碼負(fù)數(shù)
        current_page = 6
    # 訪問第6頁時(shí)，只會(huì)顯示當(dāng)前頁-5和+6的底部頁碼數(shù),但是當(dāng)頁面小于6時(shí)，頁碼會(huì)出現(xiàn)0甚至負(fù)數(shù)，所有我們需要對(duì)頁面進(jìn)行一個(gè)設(shè)置，就是上述的a
    for i in range(current_page-5,current_page+6):
        if a == i:
            # 當(dāng)前頁的頁面高亮顯示
            html += '<li class="active"><a href="?page=%s" rel="external nofollow"  rel="external nofollow" >%s</a></li>' % (i, i)
        else:
            html += '<li><a href="?page=%s" rel="external nofollow"  rel="external nofollow" >%s</a></li>' % (i, i)
    book_queryset = book_num[start_page:end_page]
    return render(request,'book.html',locals())

前端頁面部分：
<nav aria-label="Page navigation">
  <ul class="pagination">
    <li>
      <a href="#" rel="external nofollow"  rel="external nofollow"  aria-label="Previous">
        <span aria-hidden="true">&laquo;</span>
      </a>
    </li>
        {{ html|safe }}
    <li>
      <a href="#" rel="external nofollow"  rel="external nofollow"  aria-label="Next">
        <span aria-hidden="true">&raquo;</span>
      </a>
    </li>
  </ul>
</nav>

 def get_book(request):
   book_list = models.Book.objects.all()
   current_page = request.GET.get("page",1)
   all_count = book_list.count()
   page_obj = Pagination(current_page=current_page,all_count=all_count,per_page_num=10)
   page_queryset = book_list[page_obj.start:page_obj.end]
   return render(request,'booklist.html',locals())

<div class="container">
    <div class="row">
        <div class="col-md-8 col-md-offset-2">
            {% for book in page_queryset %}
            <p>{{ book.title }}</p>
            {% endfor %}
            {{ page_obj.page_html|safe }}
        </div>
    </div>
</div>