JavaScript+HTML实现学生信息管理系统

2024-04-02 19:04:59 636人浏览泡泡鱼

摘要

目录一、前言二、效果图三、代码四、学生信息管理系统主界面一、前言用数组来存储所有学生对象的信息，实现了双向更新，初始时（数组内的对象信息“填充界面”），后面的界面操作可以更新数组内

一、前言

用数组来存储所有学生对象的信息，实现了双向更新，初始时（数组内的对象信息“填充界面”），后面的界面操作可以更新数组内对象的信息（数量和本身数据域信息）。

优点：Jquery代码处理的许多细节较好。

使用HTML5的pattern+正则表达式，实现表单验证以及相应提示。

缺点：后台删除学生对象的信息代码处理效率较低（“假”删除：移动学生对象索引的位置+变换数组长度）。

CSS部分——界面的缩放存在问题。（没打算走前端/暂时懒得修改）。.

部分代码可以更好的处理已达到复用的目的，未处理。

二、效果图

三、代码

没有删去写代码过程中做改进之前的代码，看上去代码有点长（保留了写代码的思考过程）

删去注释了的代码以及一些不必要的内容，代码也不是太长。

HTML:


<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Student InfORMation Management System</title>
    <script src="../../../JQuery/JQuery.js"></script>
    <link rel="stylesheet" href="../studentInformationManagementSystemCss/studentInformationManagementSystem.css" rel="external nofollow" >
    <script src="../studentInformationManagementSystemJs/studentInformationManagementSystem.js"></script>
</head>
<body>
<div>
    <header>
        <hr/>
        <h1>学生信息管理系统</h1>
        <hr/>
    </header>
    <main>
        <div>
            <div id="adbt">
                <button class="gre" id="add">新增</button>
                <button class="red" id="delete">删除</button>
            </div>
            <table>
                <tbody>
                <tr id="thead">
                    <td><input type="checkbox"></td>
                    <td>序号</td>
                    <td>学号</td>
                    <td>姓名</td>
                    <td>学院</td>
                    <td>专业</td>
                    <td>年级</td>
                    <td>班级</td>
                    <td>年龄</td>
                    <td>操作</td>
                </tr>
                <!--<tr>
                    <td name="abc"><input type="checkbox"></td>
                    <td>1</td>
                    <td>11503080201</td>
                    <td>张三</td>
                    <td>计算机科学与工程学院</td>
                    <td>软件工程</td>
                    <td>2015</td>
                    <td>2</td>
                    <td>21</td>
                    <td><a href="#" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  class="check">查看</a> <a href="#" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  class="modify">修改</a></td>
                </tr>
                <tr>
                    <td><input type="checkbox"></td>
                    <td>2</td>
                    <td>11503080202</td>
                    <td>李四</td>
                    <td>会计学院</td>
                    <td>会计学</td>
                    <td>2015</td>
                    <td>1</td>
                    <td>19</td>
                    <td><a href="#" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  class="check">查看</a> <a href="#" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  class="modify">修改</a></td>
                </tr>
                <tr>
                    <td><input type="checkbox"></td>
                    <td>3</td>
                    <td>11503080203</td>
                    <td>王二</td>
                    <td>理学院</td>
                    <td>数学</td>
                    <td>2015</td>
                    <td>1</td>
                    <td>19</td>
                    <td><a href="#" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  class="check">查看</a> <a href="#" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  class="modify">修改</a></td>
                </tr>
                <tr>
                    <td><input type="checkbox"></td>
                    <td>4</td>
                    <td>11503080204</td>
                    <td>张三</td>
                    <td>计算机科学与工程学院</td>
                    <td>软件工程</td>
                    <td>2015</td>
                    <td>2</td>
                    <td>21</td>
                    <td><a href="#" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  class="check">查看</a> <a href="#" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  class="modify">修改</a></td>
                </tr>
                <tr>
                    <td><input type="checkbox"></td>
                    <td>5</td>
                    <td>11503080205</td>
                    <td>李四</td>
                    <td>会计学院</td>
                    <td>会计学</td>
                    <td>2015</td>
                    <td>1</td>
                    <td>19</td>
                    <td><a href="#" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  class="check">查看</a> <a href="#" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  class="modify">修改</a></td>
                </tr>
                <tr>
                    <td><input type="checkbox"></td>
                    <td>6</td>
                    <td>11503080206</td>
                    <td>王二</td>
                    <td>理学院</td>
                    <td>数学</td>
                    <td>2015</td>
                    <td>1</td>
                    <td>19</td>
                    <td><a href="#" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  class="check">查看</a> <a href="#" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  class="modify">修改</a></td>
                </tr>
                <tr>
                    <td><input type="checkbox"></td>
                    <td>7</td>
                    <td>11503080207</td>
                    <td>张三</td>
                    <td>计算机科学与工程学院</td>
                    <td>软件工程</td>
                    <td>2015</td>
                    <td>2</td>
                    <td>21</td>
                    <td><a href="#" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  class="check">查看</a> <a href="#" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  class="modify">修改</a></td>
                </tr>
                <tr>
                    <td><input type="checkbox"></td>
                    <td>8</td>
                    <td>11503080208</td>
                    <td>李四</td>
                    <td>会计学院</td>
                    <td>会计学</td>
                    <td>2015</td>
                    <td>1</td>
                    <td>19</td>
                    <td><a href="#" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  class="check">查看</a> <a href="#" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  class="modify">修改</a></td>
                </tr>
                <tr>
                    <td><input type="checkbox"></td>
                    <td>9</td>
                    <td>11503080209</td>
                    <td>王二</td>
                    <td>理学院</td>
                    <td>数学</td>
                    <td>2015</td>
                    <td>1</td>
                    <td>19</td>
                    <td><a href="#" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  class="check">查看</a> <a href="#" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  class="modify">修改</a></td>
                </tr>
                <tr>
                    <td><input type="checkbox"></td>
                    <td>10</td>
                    <td>11503080210</td>
                    <td>张三</td>
                    <td>计算机科学与工程学院</td>
                    <td>软件工程</td>
                    <td>2015</td>
                    <td>2</td>
                    <td>21</td>
                    <td><a href="#" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  class="check">查看</a> <a href="#" rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  rel="external nofollow"  class="modify">修改</a></td>
                </tr>-->
                </tbody>
            </table>
            <div id="navigate">
                <p>第<span id="pgn"></span>页,共<span id="en"></span>条 (每页最多显示10条)</p><!--Number of entries-->
                <div id="tpbt">
                    <button class="gre" id="lastpage">上一页</button>
                    <button class="red" id="nextpage">下一页</button>
                </div>
            </div>
        </div>
    </main>
</div>
<div id="sbg"></div><!--增删改查时的阴影背景-->
<div class="achaesi" id="asi">
<!--    <form action="" method="post">-->
    <h2>新增学生信息</h2>
    <div class="ifm">
        <div><label for="assn">学号</label> <input id="assn" type="text" placeholder="11503080201" required="required" maxlength="11" pattern="^[0-9]{11}$" oninvalid="setCustomValidity('请输入11位的数字组合')"></div>
        <div><label for="asn">姓名</label> <input id="asn" type="text" placeholder="雷军" required="required" minlength="2" maxlength="8" pattern="^[\u4e00-\u9fa5]+$" oninvalid="setCustomValidity('请输入正确的姓名')"></div>
        <div><label for="asac">学院</label> <input id="asac" type="text" placeholder="两江人工智能学院" required="required" minlength="3" maxlength="10" pattern="^[\u4e00-\u9fa5]+$" oninvalid="setCustomValidity('请输入正确的学院名')"></div>
        <div><label for="asm">专业</label> <input id="asm" type="text" placeholder="软件工程" required="required" minlength="3" maxlength="12" pattern="^[\u4e00-\u9fa5]+$" oninvalid="setCustomValidity('请输入正确的专业名')"></div>
        <div><label for="asg">年级</label> <input id="asg" type="text" placeholder="2015" required="required" max="2020" maxlength="4" pattern="^[0-9]{4}$" oninvalid="setCustomValidity('请输入正确的年级')"></div>
        <div><label for="asc">班级</label> <input id="asc" type="text" placeholder="1" required="required" maxlength="1"></div>
        <div><label for="asag">年龄</label> <input id="asag" type="number" placeholder="20" required="required" min="0" maxlength="2" pattern="^[0-9]+$" oninvalid="setCustomValidity('请输入正确的年龄')"></div>
    </div>
    <hr/>
    <div class="scbt">
        <button type="submit" id="submit">提交</button>
        <button class="cancel">取消</button>
    </div>
<!--    </form>-->
</div>
<div class="achaesi" id="chasi">
<!--    <form action="" method="post">-->
    <h2>修改学生信息</h2>
    <div class="ifm">
        <div><label for="chassn">学号</label> <input id="chassn" type="text" readonly required="required" maxlength="11" pattern="^[0-9]{11}$" oninvalid="setCustomValidity('请输入11位的数字组合')"></div>
        <div><label for="chasn">姓名</label> <input id="chasn" type="text" required="required" minlength="2" maxlength="8" pattern="^[\u4e00-\u9fa5]+$" oninvalid="setCustomValidity('请输入正确的姓名')"></div>
        <div><label for="chasac">学院</label> <input id="chasac" type="text" required="required" minlength="3" maxlength="10" pattern="^[\u4e00-\u9fa5]+$" oninvalid="setCustomValidity('请输入正确的学院名')"></div>
        <div><label for="chasm">专业</label> <input id="chasm" type="text" required="required" minlength="3" maxlength="12" pattern="^[\u4e00-\u9fa5]+$" oninvalid="setCustomValidity('请输入正确的专业名')"></div>
        <div><label for="chasg">年级</label> <input id="chasg" type="text" required="required" max="2020" maxlength="4" pattern=^[0-9]{4}$" oninvalid="setCustomValidity('请输入正确的年级')"></div>
        <div><label for="chasc">班级</label> <input id="chasc" type="text" required="required" maxlength="1"></div>
        <div><label for="chasag">年龄</label> <input id="chasag" type="text" required="required" min="0" maxlength="2" pattern="^[0-9]+$" oninvalid="setCustomValidity('请输入正确的年龄')"></div>
    </div>
    <hr/>
    <div class="scbt">
        <button type="submit" id="save">保存</button>
        <button class="cancel">取消</button>
    </div>
<!--    </form>-->
</div>
<div class="achaesi" id="chesi">
    <h2>查看学生信息</h2>
    <div class="ifm">
        <div><label for="chessn">学号</label> <input type="text" readonly id="chessn"></div>
        <div><label for="chesn">姓名</label> <input type="text" readonly id="chesn"></div>
        <div><label for="chesac">学院</label> <input type="text" readonly id="chesac"></div>
        <div><label for="chesm">专业</label> <input type="text" readonly id="chesm"></div>
        <div><label for="chesg">年级</label> <input type="text" readonly id="chesg"></div>
        <div><label for="chesc">班级</label> <input type="text" readonly id="chesc"></div>
        <div><label for="chesag">年龄</label> <input type="text" readonly id="chesag"></div>
    </div>
    <hr/>
    <div class="scbt">
        <button class="cancel">取消</button>
    </div>
</div>
</body>
</html>

CSS:


* {
  margin: 0;
  padding: 0;
}
a {
  text-decoration: none;
  color: red;
}
.sbg {
  position: absolute;
  top: 0;
  width: 100%;
  height: 100%;
  background-color: black;
  opacity: 0.4;
  z-index: 1;
}
body {
  background-color: #f0ece9;
}
header {
  display: flex;
  flex-flow: row nowrap;
  justify-content: space-between;
}
header h1 {
  color: #9a9897;
}
header hr {
  margin: 20px 20px 0;
  background-color: #bc9470;
  border: 2px solid #bc9470;
  width: 30%;
  height: 0;
}
main #adbt {
  margin-left: 70px;
}
main button {
  margin: 20px 5px;
  width: 85px;
  height: 40px;
  color: white;
}
main button.gre {
  background-color: #5cb85c;
}
main button.red {
  background-color: #d9534f;
}
main #navigate {
  padding: 0 70px;
  display: flex;
  flex-flow: row nowrap;
  justify-content: space-between;
}
main #navigate p {
  margin-top: 30px;
}
table {
  margin: 0 auto;
  width: 90%;
  text-align: center;
  border-spacing: 0;
}
table tbody tr:first-of-type {
  background-color: #dadee1 !important;
  height: 60px;
}
table tbody tr {
  height: 45px;
}
table tbody tr:nth-child(odd) {
  background-color: #eef1f8;
}
table tbody tr:nth-child(even) {
  background-color: #ffffff;
}
table tbody tr:not([id=thead]):hover {
  cursor: pointer;
  background-color: #e9e9e9;
}
.achaesi {
  display: none;
  position: absolute;
  top: 20%;
  left: 34%;
  background-color: white;
  z-index: 2;
  width: 500px;
  height: 420px;
}
.achaesi h2 {
  padding: 5px 20px;
  font-size: large;
  background-color: #555555;
  color: white;
}
.achaesi .ifm {
  width: 300px;
  margin: 10px auto;
  display: flex;
  flex-flow: column nowrap;
}
.achaesi .ifm div {
  margin: 10px;
}
.achaesi .ifm div input {
  width: 220px;
  height: 20px;
}
.achaesi .scbt {
  float: right;
  margin-top: 6px;
  margin-right: 30px;
}
.achaesi .scbt button:first-of-type {
  width: 85px;
  height: 36px;
  background-color: #5cb85c;
}
.achaesi .scbt button:last-of-type {
  width: 85px;
  height: 36px;
  background-color: white;
}

JS:


$(function () {
    let students = [{//初始界面数据
        schoolNumber: "11503080201",
        name: "雷军",//my idol
        academy: "两江人工智能学院",
        major: "软件工程",
        grade: 2019,
        class: 2,
        age: 20,
    }, {
        schoolNumber: "11503080202",
        name: "张三",
        academy: "计算机工程与技术学院",
        major: "计算机科学与技术",
        grade: 2019,
        class: 1,
        age: 19,
    }, {
        schoolNumber: "11503080203",
        name: "李四",
        academy: "会计学院",
        major: "会计学",
        grade: 2018,
        class: 3,
        age: 19,
    }, {
        schoolNumber: "11503080204",
        name: "王五",
        academy: "理学院",
        major: "应用物理",
        grade: 2017,
        class: 3,
        age: 21,
    }, {
        schoolNumber: "11503080204",
        name: "赵六",
        academy: "会计学院",
        major: "金融学",
        grade: 2017,
        class: 3,
        age: 21,
    }, {
        schoolNumber: "11503080202",
        name: "张三",
        academy: "计算机工程与技术学院",
        major: "计算机科学与技术",
        grade: 2019,
        class: 1,
        age: 19,
    }, {
        schoolNumber: "11503080203",
        name: "李四",
        academy: "会计学院",
        major: "会计学",
        grade: 2018,
        class: 3,
        age: 19,
    }, {
        schoolNumber: "11503080204",
        name: "王五",
        academy: "理学院",
        major: "应用物理",
        grade: 2017,
        class: 3,
        age: 21,
    }, {
        schoolNumber: "11503080204",
        name: "赵六",
        academy: "会计学院",
        major: "金融学",
        grade: 2017,
        class: 3,
        age: 21,
    }, {
        schoolNumber: "11503080202",
        name: "张三",
        academy: "计算机工程与技术学院",
        major: "计算机科学与技术",
        grade: 2019,
        class: 1,
        age: 19,
    }, {
        schoolNumber: "11503080203",
        name: "李四",
        academy: "会计学院",
        major: "会计学",
        grade: 2018,
        class: 3,
        age: 19,
    }, {
        schoolNumber: "11503080204",
        name: "王五",
        academy: "理学院",
        major: "应用物理",
        grade: 2017,
        class: 3,
        age: 21,
    }, {
        schoolNumber: "11503080204",
        name: "赵六",
        academy: "会计学院",
        major: "金融学",
        grade: 2017,
        class: 3,
        age: 21,
    }];
    let page = 1;//第几页
    let no = 0;//显示的页数的第一个对象是数组中的第几个对象，初始下标为0
    let stuNumber = students.length;
    for (let i = 0; i < 10; i++) {//初始页面信息显示
        let student = $("<tr>" + "<td><input type=\"checkbox\"></td>" + "<td>" + (i + 1) + "</td>" + "<td>" + students[i].schoolNumber + "</td>" + "<td>" + students[i].name + "</td>" + "<td>" + students[i].academy + "</td>" + "<td>" + students[i].major + "</td>" + "<td>"
            + students[i].grade + "</td>" + "<td>" + students[i].class + "</td>" + "<td>" + students[i].age + "</td>" + "<td><a href=\"javascript:;\" class=\"check\">查看</a> <a href=\"javascript:;\" class=\"modify\">修改</a></td>" + "</label></tr>");
        $("tbody").append(student);
    }
    $("tbody").trigger("create");//trigger() 方法触发被选元素上指定的事件以及事件的默认行为（比如表单提交）
    $("#pgn").text(page);
    $("#en").text(stuNumber);
    $("#add").click(function () {//点击新增按钮触发的动作
        $("#sbg").addClass("sbg");
        $("#asi").show();
    });
 
    let objKeys = ["schoolNumber", "name", "academy", "major", "grade", "class", "age"];
    $("#submit").click(function () {//提交按钮点击触发的动作
        let student = {};
        let isEmpty = false;
        $("#asi").find("input").each(function (index, domEle) {
            if (!domEle.value) {//如果添加时表单内有值为空，则不进行添加
                isEmpty = true;
                
            }
            student[objKeys[index]] = domEle.value;
        });
        if (!isEmpty) {
            students[stuNumber] = student;
            stuNumber++;
            $("#en").text(stuNumber);
            
            // $("tbody tr:first").siblings().remove();//清空界面
            let lpren = $("tbody tr").length - 1;//最后一页剩余的条目数;
            if (no + 10 > stuNumber && lpren < 10) {//增加一个append函数，如果显示的是最后一页那么需要更新界面。
                $("tbody tr:last").after("<tr>" + "<td><input type=\"checkbox\"></td>" + "<td>" + (no + lpren + 1) + "</td>" + "<td>" + student.schoolNumber + "</td>" + "<td>" + student.name + "</td>" + "<td>" + student.academy + "</td>" + "<td>" + student.major + "</td>" + "<td>"
                    + student.grade + "</td>" + "<td>" + student.class + "</td>" + "<td>" + student.age + "</td>" + "<td><a href=\"javascript:;\" class=\"check\">查看</a> <a href=\"javascript:;\" class=\"modify\">修改</a></td>" + "</tr>");
                
            }
        }
        $("#sbg").removeClass("sbg");
        $("#asi").hide();
 
    });
 
    $("tbody").on("click", ".check", function () {//点击查看按钮触发的动作
        $("#sbg").addClass("sbg");
        $("#chesi").show();
        let stuIndex = $(this).parent().parent().find("td")[1].innerText - 1;
        // let i = 0;
        $("#chesi").find("input").each(function (index, domEle) {
            domEle.value = students[stuIndex][objKeys[index]];//index->i
        });
    });
 
    let modifyNumber;
    
    $("tbody").on("click", ".modify", function () {//点击修改按钮触发的动作,解决了jQuery出现的新添加元素点击事件无效问题
        $("#sbg").addClass("sbg");
        $("#chasi").show();
        modifyNumber = $(this).parent().parent().find("td")[1].innerText - 1;
        let i = 0;
        $("#chasi").find("input").each(function (index, domEle) {
            domEle.value = students[modifyNumber][objKeys[i++]];
        });
    });
 
 
    $("#save").click(function () {//点击保存按钮触发的动作
        $("#chasi").find("input").each(function (index, domEle) {
            if (domEle.value)
                students[modifyNumber][objKeys[index]] = domEle.value;
        });
        $("tbody tr").eq(modifyNumber - no + 1).remove();
        $("tbody tr").eq(modifyNumber - no).after("<tr>" + "<td><input type=\"checkbox\"></td>" + "<td>" + (modifyNumber - no + 1) + "</td>" + "<td>" + students[modifyNumber].schoolNumber + "</td>" + "<td>" + students[modifyNumber].name + "</td>" + "<td>" + students[modifyNumber].academy + "</td>" + "<td>" + students[modifyNumber].major + "</td>" + "<td>"
            + students[modifyNumber].grade + "</td>" + "<td>" + students[modifyNumber].class + "</td>" + "<td>" + students[modifyNumber].age + "</td>" + "<td><a href=\"javascript:;\" class=\"check\">查看</a> <a href=\"javascript:;\" class=\"modify\">修改</a></td>" + "</tr>");
        
        $("#sbg").removeClass("sbg");
        $("#chasi").hide();
    });
 
 
    $(".cancel").click(function () {//多个取消按钮点击触发的动作
        $("#sbg").removeClass("sbg");
        $(".achaesi").hide();
    });
 
    $("tbody tr td:first").click(function () {//全选操作用到了JQuery的隐示迭代
        $("tbody tr td input").prop("checked", $("tbody tr:first td:first input").prop("checked"));
    });
 
    $("tbody").on("click", $("tbody tr:nth-of-type(1)").siblings().find("input"), function () {
        let isSelectAll = true;
        $("tbody tr:nth-of-type(1)").siblings().find("input").each(function (index, domEle) {
            if ($(domEle).prop("checked") == false)
                isSelectAll = false;
        });
        $("tbody tr:first td:first input").prop("checked", isSelectAll);
    })
 
    let update = (no) => {
        let i = 0;//用于增加信息条目的变量;
        $("tbody tr:first").siblings().remove();//清空界面
        while (i < 10 && no + i < stuNumber) {
            let student = $("<tr>" + "<td><input type=\"checkbox\"></td>" + "<td>" + (no + i + 1) + "</td>" + "<td>" + students[no + i].schoolNumber + "</td>" + "<td>" + students[no + i].name + "</td>" + "<td>" + students[no + i].academy + "</td>" + "<td>" + students[no + i].major + "</td>" + "<td>"
                + students[no + i].grade + "</td>" + "<td>" + students[no + i].class + "</td>" + "<td>" + students[no + i].age + "</td>" + "<td><a href=\"javascript:;\" class=\"check\">查看</a> <a href=\"javascript:;\" class=\"modify\">修改</a></td>" + "</tr>");
            $("tbody").append(student);
            i++;
        }
        $("tbody").trigger("create");
    }
 
    $("#delete").click(function () {
        if (confirm("确认要删除这些信息吗？")) {
            let delNumber = 0;//删除的信息条目数;
            let delIndexs = []; //删除信息条目的下标;用于后期处理避免“落空”导致移动无效
            // let i = 0;//用于增加信息条目的变量;
            $("tbody tr td input").each(function (index, domEle) {
                if (index != 0 && $(domEle).prop("checked")) {//index != 0,防止标题行被删除
                    delIndexs[delIndexs.length] = $(domEle).parent().next().text() - 1;
                    $(domEle).parent().parent().remove();
                    delNumber++;
                }
            });
 
            for (let j = delIndexs.length - 1; j >= 0; j--) {
                for (let k = delIndexs[j]; k < stuNumber - 1; k++) {//低效的代码，需要大量移动对象索引;对JS不太熟悉，还没有想到高效的解决办法!
                    students[k] = students[k + 1];
                }
            }
 
            stuNumber -= delNumber;//指向储存底层数据(学生对象)的数组尾部的指针“移动”
            $("#en").text(stuNumber);//更新条目数
            if (stuNumber == no) {
                no -= 10;
                page--;
                $("#pgn").text(page);
            }
            update(no);
            
            $("tbody tr td:first input").prop("checked", false);
        }
    });
 
    $("#nextpage").click(function () {
        if (no + 10 < stuNumber) {
            no += 10;
            page++;
            $("#pgn").text(page);
            update(no);
            $("tbody tr:first td:first input").prop("checked", false);
            
        } else {
            alert("已经是最后一页。");
        }
    });
 
    $("#lastpage").click(function () {
        if (no - 10 >= 0) {
            no -= 10;
            page--;
            $("#pgn").text(page);
            update(no);
            $("tbody tr:first td:first input").prop("checked", false);
            
        } else {
            alert("已经是第一页。");
        }
    });
 
})