js+php+mysql的简单学生管理系统,

实现的效果如下图所示：

注册

登录

系统主页

新增页面

修改页面

注册页面–register.html

<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="UTF-8">
        <meta name="viewport" content="width=device-width, initial-scale=1.0">
        <title>Document</title>
        <!-- 最新版本的 Bootstrap 核心 CSS 文件 -->
        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap@3.3.7/dist/css/bootstrap.min.css" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">
        <style>
            html,body{
                width: 100%;
                height: 100%;
                
            }
            body{
                background: url(./1.png) no-repeat 100% 100%;
            }
            body .container{
                width: 100%;
                height: 100%;
                display: flex;
                justify-content: center;
                align-items: center;
            }
            #register{
                width: 400px;
                
            }
            .panel-footer{
                display: flex;
                /* 垂直方向 */
                align-items: center;
                /* 水平方向 */
                justify-content: space-between;
            }
            .alert{
                margin: 0px;
                padding: 2px;
                text-align: center;
                display: none;
            }
        </style>
        
    </head>
    <body>
        <div class = 'container'>
            <div class = 'panel panel-primary' id = 'register'>
                <div class = 'panel-heading'>
                    注册
                </div>
                <div class = 'panel-body'>
                    <div class = 'form-group'>
                        <label for="username">用户名：</label>
                        <input type="text" name = 'username' class = 'form-control' placeholder="用户名" />
                    </div>
                    <div class = 'form-group'>
                        <label for="password">密码：</label>
                        <input type="text" name = 'password' class = 'form-control' placeholder="密码" />
                    </div>
                    <div class = 'form-group'>
                        <label for="repassword">确认密码：</label>
                        <input type="text" name = 'repassword' class = 'form-control' placeholder="确认密码" />
                    </div>
                    <div class="alert alert-danger" role="alert">...</div>
                </div>
                <div class = 'panel-footer'>
                    <a href="./login.html">马上登陆</a>
                    <button class = 'btn btn-primary' id = 'registerBtn'>注册</button>
                </div>
            </div>
        </div>
        <script type = 'module'>
            import {$post, antiShake} from "./ajax.js";
            var oBtn = document.querySelector("#registerBtn");
            var aInputs = document.querySelectorAll(".panel-body input");
            var aAlert = document.querySelector(".alert");

            //函数防抖
            oBtn.onclick = antiShake(download, 1000);
            
            function download(){
                $post({
                    url: "register.php",
                    data: {
                        username: aInputs[0].value,
                        password: aInputs[1].value,
                        repassword: aInputs[2].value,
                        createTime: (new Date().getTime())
                    },
                    success: function(result){
                        // console.log(result);
                        var obj = JSON.parse(result);
                        aAlert.style.display = 'block';
                        if(obj.code){
                            //错误
                            aAlert.className = 'alert alert-danger';
                            aAlert.innerHTML = obj.msg;

                        }else{
                            aAlert.className = 'alert alert-success';
                            //成功
                            aAlert.innerHTML = obj.msg;
                            setTimeout(() => {
                                location.assign("login.html");
                            }, 500);
                        }
                    },
                    error: function(msg){
                        console.log(msg);
                    }
                })
            }
            

        </script>
    </body>
</html>

注册的php代码-register.php

<?php
    header('content-type:text/html;charset="utf-8"');

    $responseData = array("code" => 0, "msg" => "");
    /*
        在后台再进行一次数据校验
    */
    $username = $_POST['username'];
    $password = $_POST['password'];
    $repassword = $_POST['repassword'];
    $createTime = $_POST['createTime'];

    //1、判断用户名是否存在
    if(!$username){
        $responseData['code'] = 1;
        $responseData['msg'] = "用户名不能为空";
        echo json_encode($responseData);
        exit;
    }
    if(!$password){
        $responseData['code'] = 2;
        $responseData['msg'] = "密码不能为空";
        echo json_encode($responseData);
        exit;
    }

    if($password != $repassword){
        $responseData['code'] = 3;
        $responseData['msg'] = "两次输入不一致";
        echo json_encode($responseData);
        exit;
    }

    $link = mysqli_connect("127.0.0.1", "root", "123456abc");
    if(!$link){
        $responseData['code'] = 4;
        $responseData['msg'] = "服务器忙";
        echo json_encode($responseData);
        exit;
    }
    mysqli_set_charset($link, "utf8");

    mysqli_select_db($link, "qd2002");


    $sql = "SELECT * FROM users WHERE username='{$username}'";
    //mysql result
    $res = mysqli_query($link, $sql);
    //取出一行
    $row = mysqli_fetch_assoc($res);

    //已经注册
    if($row){
        $responseData['code'] = 5;
        $responseData['msg'] = "用户名已经存在";
        echo json_encode($responseData);
        exit;
    }

    //加密
    $str = md5(md5(md5($password).'qianfeng').'xiaoming');

    //准备sql，插入
    $sql2 = "INSERT INTO users (username,password,createTime) VALUES('{$username}','{$str}',{$createTime})";

    $res = mysqli_query($link, $sql2);
    if($res){
        $responseData['msg'] = "注册成功";
        echo json_encode($responseData);
    }else{
        $responseData['code'] = 6;
        $responseData['msg'] = "注册失败";
        echo json_encode($responseData);
        exit;
    }

    mysqli_close($link);
?>

登录页面-login.html

<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="UTF-8">
        <meta name="viewport" content="width=device-width, initial-scale=1.0">
        <title>Document</title>
        <!-- 最新版本的 Bootstrap 核心 CSS 文件 -->
        <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap@3.3.7/dist/css/bootstrap.min.css" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u" crossorigin="anonymous">
        <style>
            html,body{
                width: 100%;
                height: 100%;
                
            }
            body{
                background: url(./1.png) no-repeat 100% 100%;
            }
            body .container{
                width: 100%;
                height: 100%;
                display: flex;
                justify-content: center;
                align-items: center;
            }
            #login{
                width: 400px;
                
            }
            .panel-footer{
                display: flex;
                /* 垂直方向 */
                align-items: center;
                /* 水平方向 */
                justify-content: space-between;
            }
            .alert{
                margin: 0px;
                padding: 2px;
                text-align: center;
                display: none;
            }
        </style>
        
    </head>
    <body>
        <div class = 'container'>
            <div class = 'panel panel-primary' id = 'login'>
                <div class = 'panel-heading'>
                    登陆
                </div>
                <div class = 'panel-body'>
                    <div class = 'form-group'>
                        <label for="username">用户名：</label>
                        <input type="text" name = 'username' class = 'form-control' placeholder="用户名" />
                    </div>
                    <div class = 'form-group'>
                        <label for="password">密码：</label>
                        <input type="text" name = 'password' class = 'form-control' placeholder="密码" />
                    </div>

                    <div class="alert alert-danger" role="alert">...</div>
                </div>
                <div class = 'panel-footer'>
                    <a href="./register.html">马上注册</a>
                    <button class = 'btn btn-primary' id = 'loginBtn'>登陆</button>
                </div>
            </div>
        </div>
        <script type = 'module'>
            import {$post, antiShake} from "./ajax.js";
            var oBtn = document.querySelector("#loginBtn");
            var aInputs = document.querySelectorAll(".panel-body input");
            var aAlert = document.querySelector(".alert");

            //函数防抖
            oBtn.onclick = antiShake(download, 1000);
            
            function download(){
                $post({
                    url: "login.php",
                    data: {
                        username: aInputs[0].value,
                        password: aInputs[1].value,
                    },
                    success: function(result){
                        // console.log(result);
                        var obj = JSON.parse(result);
                        aAlert.style.display = 'block';
                        if(obj.code){
                            //错误
                            aAlert.className = 'alert alert-danger';
                            aAlert.innerHTML = obj.msg;

                        }else{
                            aAlert.className = 'alert alert-success';
                            //成功
                            aAlert.innerHTML = obj.msg;
                        }
                    },
                    error: function(msg){
                        console.log(msg);
                    }
                })
            }
            

        </script>
    </body>
</html>

登录页面-login.php

<?php
    header('content-type:text/html;charset="utf-8"');

    $responseData = array("code" => 0, "msg" => "");
    /*
        在后台再进行一次数据校验
    */
    $username = $_POST['username'];
    $password = $_POST['password'];
     //1、判断用户名是否存在
     if(!$username){
        $responseData['code'] = 1;
        $responseData['msg'] = "用户名不能为空";
        echo json_encode($responseData);
        exit;
    }
    if(!$password){
        $responseData['code'] = 2;
        $responseData['msg'] = "密码不能为空";
        echo json_encode($responseData);
        exit;
    }
    //天龙八部
    //1、链接数据库
    $link = mysqli_connect("127.0.0.1", "root", "123456abc");

    //2、判断数据库是否链接成功
    if(!$link){
        $responseData['code'] = 4;
        $responseData['msg'] = "服务器忙";
        echo json_encode($responseData);
        exit;
    }
    //3、设置访问字符集
    mysqli_set_charset($link, "utf8");

    //4、选择我们要访问的数据库
    mysqli_select_db($link, "qd2002");

    //5、准备sql语句，进行登陆
    //加密
    $str = md5(md5(md5($password).'qianfeng').'xiaoming');
    $sql = "SELECT * from users WHERE username='{$username}' AND password='{$str}'";

    //6、发送sql语句
    $res = mysqli_query($link, $sql);

    //查询，取出其中的行
    $row = mysqli_fetch_assoc($res);
    // var_dump($row);

    if($row){
        
        $responseData['msg'] = "登陆成功";
        echo json_encode($responseData);
        
    }else{
        $responseData['code'] = 5;
        $responseData['msg'] = "用户名或密码错误";
        echo json_encode($responseData);
        exit;
    }

    mysqli_close($link);
?>

主页面 show.html

<    <!DOCTYPE html>
    <html lang="en">
    <head>
        <meta charset="UTF-8">
        <meta name="viewport" content="width=device-width, initial-scale=1.0">
        <link rel="stylesheet" href="https://cdn.staticfile.org/twitter-bootstrap/3.3.7/css/bootstrap.min.css">  
        <script src="https://cdn.staticfile.org/jquery/2.1.1/jquery.min.js"></script>
        <script src="https://cdn.staticfile.org/twitter-bootstrap/3.3.7/js/bootstrap.min.js"></script>
        <link rel="shortcut icon" href="favicon.ico" type="image/x-icon">
        <title>Document</title>
        <style>
            .box{
                box-sizing: border-box;
                width: 100%;
                height: 100%;
                padding: 100px;
                position: absolute;
                top: 0%;
                left: 0%;
                background-color: rgba(200, 200, 200, .7);
                display: none;
            }
            .panel-footer{
            display: flex;
            justify-content: center;
            align-items: center;
        }
        </style>

    </head>
    <body>
        <div class="container">
            <div class="panel panel-primary">
                 <div class="panel-heading">
                     <h2>学生成绩管理系统</h2>
                 </div>
                 <div class="panel-body">
                    <button type="button" class="btn btn-success select">获取学生成绩</button>
                    <button type="button" class="btn btn-success add">添加学生成绩</button>
                     <table class="table table-hover">
                         <thead>
                             <tr>
                                 <th>学生学号</th>
                                 <th>学生姓名</th>
                                 <th>语文成绩</th>
                                 <th>数学成绩</th>
                                 <th>英语成绩</th>
                                 <th colspan="2" style="text-align: center;">操作</th>
                             </tr>
                         </thead>
                         <tbody id="tb"> </tbody>
                     </table>
                 </div>
                 <div class='panel-footer'>
                    <nav aria-label="...">
                        <ul class="pager">
                          <li class="previous disabled"><a href="#"><span aria-hidden="true">&larr;</span> 上一页</a></li>
                        </ul>
                    </nav>
                    <nav aria-label="Page navigation">
                        <ul class="pagination">
                          <li class = 'active'><a href="#">1</a></li>
                          <li><a href="#">2</a></li>
                          <li><a href="#">3</a></li>
                          <li><a href="#">4</a></li>
                          <li><a href="#">5</a></li>
                        </ul>
                    </nav>
                    <nav aria-label="...">
                        <ul class="pager">  
                          <li class="next"><a href="#">下一页 <span aria-hidden="true">&rarr;</span></a></li>
                        </ul>
                    </nav>
                </div>
            </div>
        </div>

        <div class='panel-body box'>
            <div class='form-group'>
                <label for="username">学生姓名：</label>
                <input type="text" class='form-control' name='username' id="username" placeholder="学生姓名">
            </div>
            <div class='form-group'>
                <label for="chinese">语文成绩：</label>
                <input type="text" class='form-control' name='chinese' placeholder="语文成绩">
            </div>
            <div class='form-group'>
                <label for="math">数学成绩：</label>
                <input type="text" class='form-control' name='math' placeholder="数学成绩">
            </div>
            <div class='form-group'>
                <label for="english">英语成绩：</label>
                <input type="text" class='form-control' name='english' placeholder="英语成绩">
            </div>
            <button id = 'btn1' class = 'btn btn-primary cancel'>取消</button>
            <button id = 'submit' class = 'btn btn-primary'>确定</button>
        </div>
    </body>
    <script type="module">
        import {post} from "./ajax.js";
        var oBtain = document.querySelector(".select");
        var oAdd = document.querySelector(".add")
        var oTb = document.querySelector("#tb");
        var oBox = document.querySelector(".box");
        var oCancel =document.querySelector(".cancel");
        var oSubmit = document.getElementById("submit");

        //展示信息
        function show(){
            post({
            url:"show.php",
            success:function(result){
                var arr = JSON.parse(result);
                var str = '';
                for(var i = 0;i<arr.length;i++){
                    str +=`<tr>
                        <td>${arr[i].id}</td>
                        <td>${arr[i].username}</td>
                        <td>${arr[i].chinese}</td>
                        <td>${arr[i].math}</td>
                        <td>${arr[i].english}</td>
                        <td ><button type="button" class="btn btn-danger" id='${arr[i].id}'>删除</button></td>
                        <td><button type="button" class="btn btn-warning" id='${arr[i].id}'>修改</button></td>
                        </tr>`
                }
                oTb.innerHTML=str;
            },
            error:function(error){
                console.log(error)
            }
        })
        }
        oBtain.onclick = function(){
           show()
        }

        var aIput = document.querySelectorAll("input");
        //插入信息
        oAdd.onclick = function(){
            oBox.style.display="block";
            oSubmit.onclick = function(){
                post({
                url:"insert.php",
                data:{
                    username:aIput[0].value,
                    chinese:aIput[1].value,
                    math:aIput[2].value,
                    english:aIput[3].value,
                },
                success:function(result){
                    if(result=="success"){
                        alert("添加成功")
                    }else{
                        alert("添加失败，请重试")
                    }
                    
                },
                error:function(error){
                    console.log(error)
                }
                })
        }
    }
    oCancel.onclick = function(){
                oBox.style.display="none";
    }

    //删除和修改学生信息
    oTb.onclick = function(eve){
        var e = eve||window.event;
        var target = e.target ||e.srcElement;
        if(target.nodeName.toLocaleLowerCase() == 'button'){
            switch(target.className){
                //删除
                case 'btn btn-danger':                
                    post({
                        url:"delete.php",
                        data:{
                            id:target.id
                        },
                    success:function(result){
                        if(result=="success"){
                            oTb.removeChild(target.parentNode.parentNode);
                            alert("删除成功")
                        }else{
                            alert("删除失败")
                        }
                        }
                    });
                    break;
                    //修改
                case 'btn btn-warning':
                post({
                    url:"update.php",
                    data:{
                            id:target.id
                        },
                    success:function(result){
                        var arr = JSON.parse(result);
                        oBox.style.display="block";
                            aIput[0].value=arr[0].username,
                            aIput[1].value=arr[0].chinese,
                            aIput[2].value=arr[0].math,
                            aIput[3].value=arr[0].english;
                            var id = arr[0].id;
                            oSubmit.onclick=function(){
                                post({
                            url:"update1.php",
                                data:{
                                    id:id,
                                    username:aIput[0].value,
                                    chinese:aIput[1].value,
                                    math:aIput[2].value,
                                    english:aIput[3].value,
                                },
                                success:function(result){
                                    if(result=="success"){
                                        alert("修改成功")
                                    }else{
                                        alert("请重新修改")
                                    }
                                }
                      })
                            }

                        }
                })
               
            }       
    }
 }
    </script>
    </html>

通过ajax传数据-ajax.js

export{
    post,
    get,
    ajax
}

function post(){
    var argus =Object.assign({"method" :"post"},...arguments)
    var g = new Ajax(argus);
    g.init();
    g.type()
}

function get(){
    var argus =Object.assign({"method" :"get"},...arguments)
    var g = new Ajax(argus);
    g.init();
    g.type()
}

// function ajax(){
//     var a =new Ajax(...arguments);
//     a.init();
//     a.type();
// }

function ajax(){
    var a = new Ajax(...arguments);
    a.init();
    a.type()
}
class Ajax{
    constructor({method,url,data,success,error}){
        this.method = method;
        this.url = url;
        this.data = data;
        this.success = success;
        this.error = error;
    }
    init(){
        var xhr = null;
        try{
            xhr = new  XMLHttpRequest;
        }catch{
            xhr = new ActiveXObject("XMLHTTP");
        }
        return xhr;
    }

    type(){
        var xhr= this.init()
        var querystring=""
        if(this.data){
            querystring = this.queryString(this.data);
        }
        if(this.method=="get"){
            xhr.open(this.method,this.url+"?"+querystring,true);
            xhr.send();
        }else{
            xhr.open(this.method,this.url,true);
            xhr.setRequestHeader('content-type', "application/x-www-form-urlencoded");
            xhr.send(querystring);
        }

        xhr.onreadystatechange = ()=>{
            if(xhr.readyState ==4){
                if(xhr.status==200){
                    if(this.success){
                        this.success(xhr.responseText)
                    }
                }else{
                    if(this.error){
                        this.error("error"+xhr.status)
                    }
                }
            }
           
        }
    }

    queryString(dataObj){
        var str='';
        for(var attr in dataObj){
            str+=`${attr}=${dataObj[attr]}&`
        }
        return str.substring(0,str.length-1)
    }
}

分页-paging.php

<?php
header("content-type:text/html,charset='utf8'");
$page = $_POST['page'] ? $_POST['page'] :1;
$limit = $_POST['limit'] ? $_POST['limit']:10;
$count = 0; //总条数
$pages = 0; //总页数
$skip = 0; //跳过的条数

$link=mysqli_connect("localhost","root","root");
if(!$link){
    echo "服务器忙，请重试";
    exit;
}
mysqli_set_charset($link,"utf8");
mysqli_select_db($link,"nz");
$sql = "SELECT COUNT(*) FROM students";
$res=mysqli_query($link,$sql);
$row = mysqli_fetch_assoc($res);
$count = $row['COUNT(*)'];
// echo $count;
$pages = ceil($count / $limit);
$page = max(1, $page);
$page = min($page, $pages);
$skip = ($page -1) * $limit;
$msg =array(
    "page" => $page, 
    "count" => $count, 
    "pages" => $pages, 
    "limit" => $limit, 
    "skip" => $skip,
    "userlist" => array()
);
$sql2 = "SELECT * FROM students LIMIT {$skip}, {$limit}";
$res2 = mysqli_query($link, $sql2);
while($row2 = mysqli_fetch_assoc($res2)){
    array_push($msg['userlist'], $row2);
}
echo json_encode($msg);
mysqli_close($link);

?>

数据添加 insert.php

<?php

header("content-type:text/html,charset='utf8'");
$username = $_POST['username'];
$chinese = $_POST['chinese'];
$math = $_POST['math'];
$english = $_POST['english'];
$link = mysqli_connect("localhost","root","root");
if(!$link){
    echo "服务器忙，请稍后重试";
    exit;
};
mysqli_set_charset($link,"utf8");
mysqli_select_db($link,"nz");
$sql ="insert into students (username,chinese,math,english) values('{$username}','{$chinese}','{$math}','{$english}')";
$res = mysqli_query($link,$sql);
if($res){
    echo "success";
}else{
    echo "error";
};

mysqli_close($link);
?>

数据删除 delete.php

<?php
header('content-type:text/html,charset="utf8"');
$id=$_POST['id'];
$link=mysqli_connect("localhost","root","root");
if(!$link){
    echo "服务器忙，请重试";
    exit;
};
mysqli_set_charset($link,"utf8");
mysqli_select_db($link,"nz");
$sql="delete from students where id={$id}";
$res =  mysqli_query($link,$sql);
if($res){
    echo "success";
}else{
    echo "error";
};
mysqli_close($link);
?>

数据修改-查找update.php

<?php
header("content-type:text/html,charset='utf8'");
$id=$_POST['id'];

$link=mysqli_connect("localhost","root","root");
if(!$link){
    echo "服务器忙，请重试";
    exit;
}
mysqli_set_charset($link,"utf8");
mysqli_select_db($link,"nz");
$sql="select  * from students where id ='{$id}'";
$res=mysqli_query($link,$sql);
$arr = array();
while($row=mysqli_fetch_assoc($res)){
    array_push($arr,$row);
};
echo json_encode($arr);
mysqli_close($link);

?>

数据修改-更新 update1.php

<?php
header("content-type:text/html,charset='utf8'");
$id = $_POST['id'];
$username = $_POST['username'];
$chinese = $_POST['chinese'];
$math = $_POST['math'];
$english = $_POST['english'];

$link=mysqli_connect("localhost","root","root");
if(!$link){
    echo "服务器忙，请重试";
    exit;
}
mysqli_set_charset($link,"utf8");
mysqli_select_db($link,"nz");
// $sql="delete from students where id={$id}";
$sql = "UPDATE students SET username ={$username} ,chinese ={$chinese},math={$math},english={$english} where id={$id}";
$res=mysqli_query($link,$sql);
if($res){
    echo "success";
}else{
    echo "error";
};
mysqli_close($link);

?>
请用今天的努力，让明天没有遗憾。
【推广】 免费学中医，健康全家人
原文地址：https://www.cnblogs.com/cupid10/p/15617747.html