怎样在网页中添加地图留言板功能,包括用户注册、留言、修改、删除、查询、统计图表等功能的完整代码
时间: 2023-07-10 11:33:28 浏览: 72
很抱歉,由于地图API服务提供商、后端编程语言、前端框架等因素的不同,完整的代码实现会有很大的差异,无法一一列举。下面是一个简单的实现地图留言板功能的示例代码,供您参考:
HTML代码:
```
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>地图留言板</title>
<style>
#map {
width: 800px;
height: 600px;
}
</style>
</head>
<body>
<div id="map"></div>
<div id="form">
<h2>留言板</h2>
<form>
<label for="username">用户名:</label>
<input type="text" id="username" name="username"><br>
<label for="content">留言内容:</label>
<textarea id="content" name="content"></textarea><br>
<label for="lng">经度:</label>
<input type="text" id="lng" name="lng"><br>
<label for="lat">纬度:</label>
<input type="text" id="lat" name="lat"><br>
<button type="submit">提交</button>
</form>
</div>
<div id="table">
<h2>留言列表</h2>
<table>
<thead>
<tr>
<th>用户名</th>
<th>留言内容</th>
<th>经度</th>
<th>纬度</th>
<th>操作</th>
</tr>
</thead>
<tbody id="message-list"></tbody>
</table>
</div>
<div id="chart">
<h2>统计图表</h2>
<div id="chart-container"></div>
</div>
<script src="https://maps.googleapis.com/maps/api/js?key=YOUR_API_KEY"></script>
<script src="https://code.jquery.com/jquery-3.5.1.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/axios/dist/axios.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/echarts/dist/echarts.min.js"></script>
<script>
var map;
var markers = [];
function initMap() {
map = new google.maps.Map(document.getElementById('map'), {
center: {lat: 39.9042, lng: 116.4074},
zoom: 8
});
map.addListener('click', function(event) {
addMarker(event.latLng);
});
}
function addMarker(location) {
var marker = new google.maps.Marker({
position: location,
map: map
});
markers.push(marker);
$('#lng').val(location.lng());
$('#lat').val(location.lat());
}
function clearMarkers() {
for (var i = 0; i < markers.length; i++) {
markers[i].setMap(null);
}
markers = [];
}
function showMessageList() {
axios.get('/api/message')
.then(function(response) {
var messages = response.data;
var html = '';
for (var i = 0; i < messages.length; i++) {
var message = messages[i];
html += '<tr><td>' + message.username + '</td><td>' + message.content + '</td><td>' + message.lng + '</td><td>' + message.lat + '</td><td><button onclick="deleteMessage(' + message.id + ')">删除</button></td></tr>';
}
$('#message-list').html(html);
})
.catch(function(error) {
console.log(error);
});
}
function addMessage() {
var username = $('#username').val();
var content = $('#content').val();
var lng = $('#lng').val();
var lat = $('#lat').val();
axios.post('/api/message', {
username: username,
content: content,
lng: lng,
lat: lat
})
.then(function(response) {
console.log(response);
showMessageList();
})
.catch(function(error) {
console.log(error);
});
}
function deleteMessage(id) {
axios.delete('/api/message/' + id)
.then(function(response) {
console.log(response);
showMessageList();
})
.catch(function(error) {
console.log(error);
});
}
function showChart() {
axios.get('/api/stats')
.then(function(response) {
var stats = response.data;
var chartData = [];
for (var i = 0; i < stats.length; i++) {
var stat = stats[i];
chartData.push({
name: stat.username,
value: stat.count
});
}
var chart = echarts.init(document.getElementById('chart-container'));
chart.setOption({
title: {
text: '留言用户统计'
},
tooltip: {},
xAxis: {
data: stats.map(function(stat) {
return stat.username;
})
},
yAxis: {},
series: [{
name: '留言数量',
type: 'bar',
data: chartData
}]
});
})
.catch(function(error) {
console.log(error);
});
}
$(document).ready(function() {
initMap();
showMessageList();
showChart();
$('form').submit(function(event) {
event.preventDefault();
addMessage();
});
});
</script>
</body>
</html>
```
JavaScript代码:
```
var express = require('express');
var bodyParser = require('body-parser');
var mysql = require('mysql');
var app = express();
var conn = mysql.createConnection({
host: 'localhost',
user: 'root',
password: 'password',
database: 'map_message'
});
app.use(bodyParser.urlencoded({extended: false}));
app.use(bodyParser.json());
app.use(express.static(__dirname + '/public'));
app.get('/api/message', function(req, res) {
conn.query('SELECT * FROM message', function(error, results, fields) {
if (error) {
console.log(error);
res.json([]);
} else {
res.json(results);
}
});
});
app.post('/api/message', function(req, res) {
var username = req.body.username;
var content = req.body.content;
var lng = req.body.lng;
var lat = req.body.lat;
conn.query('INSERT INTO message(username, content, lng, lat) VALUES(?, ?, ?, ?)', [username, content, lng, lat], function(error, results, fields) {
if (error) {
console.log(error);
res.json({success: false});
} else {
res.json({success: true});
}
});
});
app.delete('/api/message/:id', function(req, res) {
var id = req.params.id;
conn.query('DELETE FROM message WHERE id = ?', [id], function(error, results, fields) {
if (error) {
console.log(error);
res.json({success: false});
} else {
res.json({success: true});
}
});
});
app.get('/api/stats', function(req, res) {
conn.query('SELECT username, COUNT(*) AS count FROM message GROUP BY username', function(error, results, fields) {
if (error) {
console.log(error);
res.json([]);
} else {
res.json(results);
}
});
});
app.listen(3000, function() {
console.log('Server is running on port 3000');
});
```
上面是一个简单的地图留言板功能的示例代码,其中使用了Google Maps API作为地图服务,使用了jQuery、axios和ECharts等库来简化代码编写。需要注意的是,这个示例代码仅供参考,实际开发中还需要考虑很多其他问题,如安全性、性能优化等。
相关推荐
![pdf](https://img-home.csdnimg.cn/images/20210720083512.png)
![zip](https://img-home.csdnimg.cn/images/20210720083736.png)
![-](https://csdnimg.cn/download_wenku/file_type_column_c1.png)
![-](https://csdnimg.cn/download_wenku/file_type_column_c1.png)
![-](https://csdnimg.cn/download_wenku/file_type_column_c1.png)
![-](https://csdnimg.cn/download_wenku/file_type_column_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)