开始Flask项目

Posted wtaure

tags:

篇首语：本文由小常识网(cha138.com)小编为大家整理，主要介绍了开始Flask项目相关的知识，希望对你有一定的参考价值。

  1. 新建Flask项目。
  2. 设置调试模式。
  3. 理解Flask项目主程序。
  4. 使用装饰器，设置路径与函数之间的关系。
  5. 使用Flask中render_template，用不同的路径，返回首页、登录员、注册页。
  6. 用视图函数反转得到URL，{{url_for(‘login’)}}，完成导航条里的链接。
from flask import Flask,render_template

ap = Flask(__name__)


@ap.route(\'/\')
def shouye():
    return render_template(\'shouye.html\')


@ap.route(\'/zhuce\')
def zhuce():
    return render_template(\'zhuce.html\')

@ap.route(\'/denglu\')
def denglu():
    return render_template(\'denglu.html\')



if __name__ == \'__main__\':
    ap.run(debug=\'True\')

1.登陆

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>login</title>
    <link href="https://cdn.bootcss.com/bootstrap/4.0.0-beta/css/bootstrap.css" rel="stylesheet">
    <link href="https://cdn.bootcss.com/font-awesome/4.7.0/css/font-awesome.css" rel="stylesheet">

    <script>

function MyLogin() {
            var oUname=document.getElementById("uname");
            var oUpass=document.getElementById("upass");
            var oError1=document.getElementById("errorbox1");
            var oError2=document.getElementById("errorbox2");
            if(oUname.value.length<6 ||oUname.value.length>20){
                oError1.innerHTML=\'Usename必须属于6-20位\';
            }else {
                oError1.innerHTML="&nbsp"
            }

            if(oUpass.value.length<6||oUpass.value.length>20) {
                oError2.innerHTML = "Password必须属于6-20位";
            }
                else {
                oError2.innerHTML="&nbsp"

            }
        }
    </script>

</head>
<body background="WeChat Image_20171027161942.png" style="background-repeat:no-repeat;background-size: 100% 100%; background-attachment: fixed;">
<a href="{{ url_for(\'shouye\') }}">首页</a>
<div class="container-fluid" >

    <div class="mt-5 pt-5" >
        <div class="card border-primary mb-3 m-auto" style="max-width: 20rem;">
            <div class="card-header text-center">wgd</div>
            <div class="card-body text-primary">
                <h4 class="card-title">用户登录</h4>
                <div class="input-group mb-2 mr-sm-2 mb-sm-0">
                    <div class="input-group-addon"><i class="fa fa-user"></i></div>
                    <input type="text" class="form-control" placeholder="Username" id="uname" required="true">
                </div>
                <p  id="errorbox1" class="m-0 p-0 text-danger"> &nbsp</p>
                <div class="input-group mb-2 mr-sm-2 mb-sm-0">
                    <div class="input-group-addon"><i class="fa fa-lock"></i></div>
                    <input type="password" class="form-control" placeholder="Password" id="upass" required>
                </div>
                <p id="errorbox2" class="m-0 p-0 text-danger"> &nbsp</p>
                <div class="row">
                    <div class="col-3">
                        <button type="button" class="btn btn-outline-primary" onclick="MyLogin()" >登录</button>
                    </div>

                    <div class="col-9 text-sm-right">
                        <a href="{{ url_for(\'zhuce\') }}"  >注册 </a>|<a href="#" class="text-sm-right"> 忘记密码？</a>
                    </div>
                </div>

            </div>
        </div>
    </div>
</body>
</html>

2.注册

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>login</title>
    <link href="https://cdn.bootcss.com/bootstrap/4.0.0-beta/css/bootstrap.css" rel="stylesheet">
    <link href="https://cdn.bootcss.com/font-awesome/4.7.0/css/font-awesome.css" rel="stylesheet">

    <script>

function MyLogin() {

            var oUname=document.getElementById("uname");
            var oUpass=document.getElementById("upass");
            var oError1=document.getElementById("errorbox1");
            var oError2=document.getElementById("errorbox2");
            oError1.innerHTML="<br>"
            oError2.innerHTML="<br>"
            if(oUname.value.length<6 ||oUname.value.length>20){
                oError1.innerHTML=\'Usename必须属于6-20位\';

            }else if((oUname.value.charCodeAt(0)>=48)&&(oUname.value.charCodeAt(0)<=57)){
                oError1.innerHTML=\'Useman不得以数字开头\';

                }else for(var i=0;i<oUname.value.length;i++){
                if((oUname.value.charCodeAt(i)<48||oUname.value.charCodeAt(i)>57)&&(oUname.value.charCodeAt(i)<97||oUname.value.charCodeAt(i)>122)){
                    oError1.innerHTML=\'用户名必须由数字或字母组成\'

                }
            }

            if(oUpass.value.length<6||oUpass.value.length>20) {
                oError2.innerHTML = "Password必须属于6-20位";

            }else {
                oError2.innerHTML="&nbsp"

            }

        }
function check(){
    if(document.getElementById("upass").value!=
        document.getElementById("upass_check").value)
    {
        document.getElementById("warning").innerHTML="   两次密码的输入不一致";
    }else{
        document.getElementById("warning").innerHTML="   ";
    }
}
    </script>

</head>
<body background="WeChat Image_20171027161942.png" style="background-repeat:no-repeat;background-size: 100% 100%; background-attachment: fixed;">
<a href="{{ url_for(\'shouye\') }}">首页</a>
<div class="container-fluid" >

    <div class="mt-5 pt-5" >
        <div class="card border-primary mb-3 m-auto" style="max-width: 20rem;">
            <div class="card-header text-center">wgd</div>
            <div class="card-body text-primary">
                <h4 class="card-title" align="center">用户注册</h4>
                <div class="input-group mb-2 mr-sm-2 mb-sm-0">
                    <div class="input-group-addon"><i class="fa fa-user"></i></div>
                    <input type="text" class="form-control" placeholder="Username" id="uname" required="true">
                </div>
                <p  id="errorbox1" class="m-0 p-0 text-danger"> &nbsp</p>
                <div class="input-group mb-2 mr-sm-2 mb-sm-0">
                    <div class="input-group-addon"><i class="fa fa-lock"></i></div>
                    <input type="password" class="form-control" placeholder="Password" id="upass" required>
                </div>
                <p id="errorbox2" class="m-0 p-0 text-danger"> &nbsp</p>
                <div class="input-group mb-2 mr-sm-2 mb-sm-0">
                    <div class="input-group-addon"><i class="fa fa-lock"></i></div>
                    <input type="password" class="form-control" placeholder="Password_check" id="upass_check" required onblur="check()"/>
                </div>
                <span id="warning">   </span>
                <div class="row">
                    <div class="col-3">
                        <button type="button" class="btn btn-outline-primary" onclick="MyLogin()" >注册</button>
                    </div>

                    <div class="col-9 text-sm-right">
                        <a href="{{ url_for(\'denglu\') }}"  >已有账户登录 </a>
                    </div>
                </div>

            </div>
        </div>
    </div>
</body>
</html>

3.首页

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>首页</title>
</head>
<body>
        <h3>首页</h3>
        <a href="{{ url_for(\'denglu\') }}">登陆</a>
        <a href="{{ url_for(\'zhuce\') }}">注册</a>

</body>
</html>

 

 

 

以上是关于开始Flask项目的主要内容，如果未能解决你的问题，请参考以下文章

开始Flask项目

如何通过单击片段内的线性布局从片段类开始新活动？下面是我的代码，但这不起作用

开始Flask项目

开始Flask项目

开始Flask项目

开始Flask项目