Layui是一个前端UI框架,它可以帮助我们快速构建网页界面,但它本身并不提供数据库操作功能。要使用Layui简化MySQL的增删改查,你需要结合后端编程语言(如PHP、Python、Node.js等)来实现。以下是一个简单的示例,使用PHP和Layui实现MySQL的增删改查操作。
首先,在MySQL中创建一个名为user
的表,用于存储用户信息。
CREATE TABLE `user` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`username` varchar(50) NOT NULL,
`password` varchar(255) NOT NULL,
`email` varchar(100) NOT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
创建一个名为index.php
的文件,用于处理前端发送的请求并与MySQL数据库进行交互。
<?php
// 连接MySQL数据库
$servername = "localhost";
$username = "username";
$password = "password";
$dbname = "myDB";
$conn = new mysqli($servername, $username, $password, $dbname);
if ($conn->connect_error) {
die("连接失败: " . $conn->connect_error);
}
// 获取前端发送的请求参数
$action = isset($_GET['action']) ? $_GET['action'] : '';
$id = isset($_GET['id']) ? intval($_GET['id']) : 0;
$username = isset($_POST['username']) ? $_POST['username'] : '';
$password = isset($_POST['password']) ? $_POST['password'] : '';
$email = isset($_POST['email']) ? $_POST['email'] : '';
// 根据请求参数执行相应的MySQL操作
switch ($action) {
case 'add':
$sql = "INSERT INTO user (username, password, email) VALUES ('$username', '$password', '$email')";
break;
case 'delete':
$sql = "DELETE FROM user WHERE id=$id";
break;
case 'update':
$sql = "UPDATE user SET username='$username', password='$password', email='$email' WHERE id=$id";
break;
case 'select':
$sql = "SELECT * FROM user";
break;
default:
echo "无效的请求参数";
exit;
}
if ($conn->query($sql) === TRUE) {
echo "操作成功";
} else {
echo "错误: " . $sql . "<br>" . $conn->error;
}
$conn->close();
?>
创建一个名为index.html
的文件,用于显示表格和表单,并发送请求到后端PHP文件。
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Layui简化MySQL增删改查示例</title>
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/layui/css/layui.css" media="all">
</head>
<body>
<div class="layui-container">
<div class="layui-row">
<div class="layui-col-xs12">
<form class="layui-form" action="">
<div class="layui-form-item">
<label class="layui-form-label">用户名</label>
<div class="layui-input-block">
<input type="text" name="username" required lay-verify="required" placeholder="请输入用户名" autocomplete="off" class="layui-input">
</div>
</div>
<div class="layui-form-item">
<label class="layui-form-label">密码</label>
<div class="layui-input-block">
<input type="password" name="password" required lay-verify="required" placeholder="请输入密码" autocomplete="off" class="layui-input">
</div>
</div>
<div class="layui-form-item">
<label class="layui-form-label">邮箱</label>
<div class="layui-input-block">
<input type="email" name="email" required lay-verify="required" placeholder="请输入邮箱" autocomplete="off" class="layui-input">
</div>
</div>
<div class="layui-form-item">
<div class="layui-input-block">
<button type="button" class="layui-btn" id="add">添加</button>
<button type="button" class="layui-btn" id="delete">删除</button>
<button type="button" class="layui-btn" id="update">更新</button>
<button type="button" class="layui-btn" id="select">查询</button>
</div>
</div>
</form>
</div>
</div>
<table class="layui-hide" id="userTable" lay-filter="userTableFilter"></table>
</div>
<script src="https://cdn.jsdelivr.net/npm/jquery@3.6.0/dist/jquery.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/layui/layui.all.js"></script>
<script>
layui.use(['form', 'table'], function(){
var form = layui.form;
var table = layui.table;
// 渲染表格
table.render({
elem: '#userTable',
url: 'index.php', // 数据接口
page: true, // 开启分页
cols: [[ // 表头
{field: 'id', title: 'ID', sort: true},
{field: 'username', title: '用户名', sort: true},
{field: 'password', title: '密码', sort: true},
{field: 'email', title: '邮箱', sort: true},
{fixed: 'right', title:'操作', toolbar: '#barDemo', width:150}
]]
});
// 监听工具条
table.on('tool(userTableFilter)', function(obj){
var data = obj.data;
if(obj.event === 'delete'){
layer.confirm('真的删除行么', function(index){
obj.del();
layer.close(index);
// 发送删除请求到后端
$.post('index.php', {action: 'delete', id: data.id}, function(response) {
if (response === '操作成功') {
layer.msg('删除成功');
} else {
layer.msg('删除失败');
}
});
});
} else if(obj.event === 'update'){
// 发送更新请求到后端
$.post('index.php', {action: 'update', id: data.id, username: data.username, password: data.password, email: data.email}, function(response) {
if (response === '操作成功') {
layer.msg('更新成功');
} else {
layer.msg('更新失败');
}
});
} else if(obj.event === 'select'){
// 发送查询请求到后端
$.post('index.php', {action: 'select'}, function(response) {
// 将查询结果填充到表格中
var html = '';
response.forEach(function(item) {
html += '<tr>';
html += '<td>' + item.id + '</td>';
html += '<td>' + item.username + '</td>';
html += '<td>' + item.password + '</td>';
html += '<td>' + item.email + '</td>';
html += '<td><button class="layui-btn layui-btn-xs layui-btn-danger" lay-event="delete">删除</button></td>';
html += '<td><button class="layui-btn layui-btn-xs layui-btn-warning" lay-event="update">更新</button></td>';
html += '</tr>';
});
$('#userTable').html(html);
});
}
});
// 监听添加按钮
$('#add').on('click', function(){
layer.prompt({
title: '请输入用户信息',
formType: 1,
value: ''
}, function(value, index){
$.post('index.php', {action: 'add', username: value.username, password: value.password, email: value.email}, function(response) {
if (response === '操作成功') {
layer.msg('添加成功');
layer.close(index);
table.reload('userTable'); // 刷新表格
} else {
layer.msg('添加失败');
}
});
});
});
});
</script>
</body>
</html>
现在,你可以在浏览器中打开index.html
文件,尝试使用Layui简化MySQL的增删改查操作。请注意,这个示例仅用于演示目的,实际项目中你可能需要考虑更多的安全性和错误处理。