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。");
}
});
})
四、学生信息管理系统主界面
（1）系统主界面如图2所示，要求学生的信息存入一个数组中，每个学生是一个对象。
图1 学生信息管理系统主界面
（2）点击“新增”按钮显示一个新的窗体，录入学生的基本信息，在保存时，需要检验数据是否合法。新增页面如图3所示。
图2 新增界面
（3）点击“修改”按钮显示一个新的窗体，修改当前行的学生信息。
图3 修改界面
（4）点击“查看”按钮显示一个新的窗体，显示当前行的学生信息。此时输入框的内容不可修改。
图4 查看
（5）其他要求
- 点击“删除”按钮，显示一个询问提示，如果选择是就删除当前行。可以多选删除，点击全选时是选择当前页所有学生。
- 隔行换色。
- 行的移入移出效果（hover）。
- 能够实现下一页和上一页的功能,不能翻页的时候给出提示。
- 展示出共有多少条数据，每页的数据条数，当前页数。
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