Django+Bootstrap实现计算器的示例代码

目录

• 准备工作
• 导入Bootstrap前端框架
• 编写前端内容
• 编写视图函数

准备工作

创建一个应用

添加应用到配置

创建一个html

编写视图函数

from django.shortcuts import render

# Create your views here.

def home(request):
    return render(request, 'index.html')

配置路由

from django.contrib import admin
from django.urls import path,include

from app.views import home

urlpatterns = [
    path('admin/', admin.site.urls),
    path('',home,name='hoome'),
]

导入Bootstrap前端框架

下载地址

将css、fonts、js复制到static文件夹下 没有则创建该文件夹

编写前端内容

{% load static %}
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>计算器</title>
    <link rel="stylesheet" href="{% static 'css/bootstrap.min.css' %}" rel="external nofollow" >
    <script src="https://cdn.jsdelivr.net/npm/jquery@1.12.4/dist/jquery.min.js"></script>
    <script src="{% static 'js/bootstrap.min.js' %}"></script>

    <style>
        body{
            background-position: center 0;
            background-repeat: no-repeat;
            background-attachment: fixed;
            background-size: cover;
            -webkit-background-size: cover;
            -o-background-size: cover;
            -moz-background-size: cover;
            -ms-background-size:cover;
        }
        .input_show{
            margin-top: 35px;
            max-width: 280px;
            height: 35px;
        }
        .btn_num{
            margin:1px 1px 1px 1px;
            width: 60px;
        }
        .btn_clear{
            margin-left: 40px;
            margin-right: 20px;
        }
        .extenContent{
            height: 300px;
        }
    </style>
</head>
<body>
<div class="container-fluid">
    <div class="row">
        <div class="col-xs-1 col-sm-4"> </div>
        <div id="computer" class="col-xs-1 col-sm-6">
            <input type="text" id="txt_code" name="txt_code" value="" class="form-control input_show" placeholder="" disabled>
            <input type="text" id="txt_result" name="txt_result" value="" class="form-control input_show" placeholder="结果" disabled>
            <br>
            <div>
                <button type="button" class="btn btn-default btn_num" onclick="fun_7()">7</button>
                <button type="button" class="btn btn-default btn_num" onclick="fun_8()">8</button>
                <button type="button" class="btn btn-default btn_num" onclick="fun_9()">9</button>
                <button type="button" class="btn btn-default btn_num" onclick="fun_div()">/</button>
                <br>
                <button type="button" class="btn btn-default btn_num" onclick="fun_4()">4</button>
                <button type="button" class="btn btn-default btn_num" onclick="fun_5()">5</button>
                <button type="button" class="btn btn-default btn_num" onclick="fun_6()">6</button>
                <button type="button" class="btn btn-default btn_num" onclick="fun_mul()">*</button>
                <br>
                <button type="button" class="btn btn-default btn_num" onclick="fun_1()">1</button>
                <button type="button" class="btn btn-default btn_num" onclick="fun_2()">2</button>
                <button type="button" class="btn btn-default btn_num" onclick="fun_3()">3</button>
                <button type="button" class="btn btn-default btn_num" onclick="fun_sub()">-</button>
                <br>
                <button type="button" class="btn btn-default btn_num" onclick="fun_0()">0</button>
                <button type="button" class="btn btn-default btn_num" onclick="fun_00()">00</button>
                <button type="button" class="btn btn-default btn_num" onclick="fun_dot()">.</button>
                <button type="button" class="btn btn-default btn_num" onclick="fun_add()">+</button>
            </div>
        <div>
        <br>
        <button type="button" class="btn btn-success btn-lg btn_clear" id="lgbut_clear" onclick="fun_clear()">
    清空
</button>
<button type="button" class="btn btn-primary btn-lg" id="lgbut_compute" >
    计算
</button>
    </div>
        </div>
            <div class="col-xs-1 col-sm-2"></div>
</div>
    </div>
<div class="extenContent"></div>
<script>
    var x=document.getElementById("txt_code");
    var y=document.getElementById("txt_result");
    function fun_7() {
        x.value+='7';
    }
    function fun_8() {
        x.value+='8';
    }
    function fun_9() {
        x.value+='9';
    }
    function fun_div() {
        x.value+='/';
    }
    function fun_4() {
        x.value+='4';
    }
    function fun_5() {
        x.value+='5';
    }
    function fun_6() {
        x.value+='6';
    }
    function fun_mul() {
        x.value+='*';
    }
    function fun_1() {
        x.value+='1';
    }
    function fun_2() {
        x.value+='2';
    }
    function fun_3() {
        x.value+='3';
    }
    function fun_sub() {
        x.value+='-';
    }
    function fun_0() {
        x.value+='0';
    }
    function fun_00() {
        x.value+='00';
    }
    function fun_dot() {
        x.value+='.';
    }
    function fun_add() {
        x.value+='+';
    }
    function fun_clear() {
        x.value='';
        y.value='';

    }
</script>
<script>
    function ShowResult(data) {
        var y = document.getElementById('txt_result');
        y.value = data['result'];
    }
</script>
<script>
    $('#lgbut_compute').click(function () {
        $.ajax({
            url:'compute/',
            type:'POST',
            data:{
                'code':$('#txt_code').val()
            },
            dataType:'json',
            success:ShowResult
        })
    })
</script>
</body>
</html>

编写视图函数

import subprocess

from django.http import JsonResponse
from django.shortcuts import render

# Create your views here.
from django.views.decorators.csrf import csrf_exempt
from django.views.decorators.http import require_POST

def home(request):
    return render(request, 'index.html')

@csrf_exempt
def compute(request):
    code = request.POST.get('code')
    try:
        code = 'print(' + code + ')'
        result = subprocess.check_output(['python', '-c', code], universal_newlines=True, stderr=subprocess.STDOUT,timeout=30)
    except:
        result='输入错误'

    return JsonResponse(data={'result': result})

测试

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