Backend Development
Golang
Learn to use ECharts and golang to create unique statistical charts tutorial
Learn to use ECharts and golang to create unique statistical charts tutorial
Learn to use ECharts and golang to create unique statistical charts tutorial, you need specific code examples
Introduction
With the rise of big data and data visualization, statistical charts It has become an important tool for data display and analysis. In actual projects, how to use code to generate various unique statistical charts has become the focus of developers. This article will introduce how to use ECharts and golang to create unique statistical charts, and provide specific code examples.
1. Introduction to ECharts
ECharts is an open source project of Baidu. It is a data visualization chart library written in pure JavaScript. ECharts provides a wealth of chart types and interaction methods, is powerful and easy to use. It supports responsive design and can be displayed well on different devices. ECharts also provides a rich extension mechanism to easily customize and expand your own needs.
2. Introduction to golang
Golang is an open source programming language that focuses on simplicity, efficiency and concurrency performance. Golang is suitable for building high-performance network applications and distributed systems. In this tutorial, we will use golang as the backend language responsible for generating the data required by ECharts.
3. Preparation work
First, we need to install the development environment of ECharts and golang. The official website of ECharts (https://echarts.apache.org/) provides detailed installation documentation, and we can install it according to the documentation. Golang's official website (https://golang.org/) also provides corresponding installation guides, and we can install them as needed.
4. Integration of ECharts and golang
- Create a basic ECharts page
First, we create a basic ECharts page to display charts. Create a new file named index.html, and then write the following code:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>ECharts图表</title>
<script src="https://echarts.apache.org/dist/echarts.min.js"></script>
</head>
<body>
<div id="chart" style="width: 600px; height: 400px;"></div>
<script>
var chart = echarts.init(document.getElementById('chart'));
// 在这里编写图表的配置和数据
chart.setOption({
// 在这里设置图表的配置和数据
});
</script>
</body>
</html>- Use golang to generate statistical data
Next, we use golang to generate statistical data for display . Create a file named main.go, and then write the following code:
package main
import (
"encoding/json"
"fmt"
"io/ioutil"
"net/http"
)
func main() {
http.HandleFunc("/data", handler)
http.ListenAndServe(":8080", nil)
}
func handler(w http.ResponseWriter, r *http.Request) {
data := map[string]interface{}{
"categories": []string{"类别1", "类别2", "类别3", "类别4", "类别5"},
"series": []map[string]interface{}{
{
"name": "系列1",
"type": "bar",
"data": []float64{100, 200, 300, 400, 500},
},
{
"name": "系列2",
"type": "bar",
"data": []float64{200, 300, 400, 500, 600},
},
},
}
bytes, err := json.Marshal(data)
if err != nil {
fmt.Println("错误:", err)
return
}
w.Header().Set("Content-Type", "application/json")
w.Write(bytes)
}- Send data to ECharts page
In index.html, we need to use ajax technology from the golang server Get the data and pass the data to ECharts chart. Add the following code in the script tag:
<script>
var chart = echarts.init(document.getElementById('chart'));
// 发送ajax请求
var xhr = new XMLHttpRequest();
xhr.open('GET', '/data');
xhr.onload = function() {
if (xhr.status === 200) {
var data = JSON.parse(xhr.responseText);
chart.setOption({
xAxis: {
type: 'category',
data: data.categories,
},
yAxis: {
type: 'value',
},
series: data.series,
});
}
};
xhr.send();
</script>5. Running and debugging
- Start the golang server
In the command line, enter where main.go is located directory, and then run the following command to start the golang server:
go run main.go
- Open the ECharts page in the browser
Open the index.html page in the browser (for example http://localhost: 8080/index.html), you can see the generated statistical chart.
Conclusion
This tutorial introduces how to use ECharts and golang to create unique statistical charts, and provides specific code examples. By studying this tutorial, I believe you can use ECharts and golang more flexibly to create various exquisite statistical charts. Hope this tutorial is helpful to everyone.
The above is the detailed content of Learn to use ECharts and golang to create unique statistical charts tutorial. For more information, please follow other related articles on the PHP Chinese website!
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
1386
52
How to safely read and write files using Golang?
Jun 06, 2024 pm 05:14 PM
Reading and writing files safely in Go is crucial. Guidelines include: Checking file permissions Closing files using defer Validating file paths Using context timeouts Following these guidelines ensures the security of your data and the robustness of your application.
How to configure connection pool for Golang database connection?
Jun 06, 2024 am 11:21 AM
How to configure connection pooling for Go database connections? Use the DB type in the database/sql package to create a database connection; set MaxOpenConns to control the maximum number of concurrent connections; set MaxIdleConns to set the maximum number of idle connections; set ConnMaxLifetime to control the maximum life cycle of the connection.
How to save JSON data to database in Golang?
Jun 06, 2024 am 11:24 AM
JSON data can be saved into a MySQL database by using the gjson library or the json.Unmarshal function. The gjson library provides convenience methods to parse JSON fields, and the json.Unmarshal function requires a target type pointer to unmarshal JSON data. Both methods require preparing SQL statements and performing insert operations to persist the data into the database.
Golang framework vs. Go framework: Comparison of internal architecture and external features
Jun 06, 2024 pm 12:37 PM
The difference between the GoLang framework and the Go framework is reflected in the internal architecture and external features. The GoLang framework is based on the Go standard library and extends its functionality, while the Go framework consists of independent libraries to achieve specific purposes. The GoLang framework is more flexible and the Go framework is easier to use. The GoLang framework has a slight advantage in performance, and the Go framework is more scalable. Case: gin-gonic (Go framework) is used to build REST API, while Echo (GoLang framework) is used to build web applications.
How to find the first substring matched by a Golang regular expression?
Jun 06, 2024 am 10:51 AM
The FindStringSubmatch function finds the first substring matched by a regular expression: the function returns a slice containing the matching substring, with the first element being the entire matched string and subsequent elements being individual substrings. Code example: regexp.FindStringSubmatch(text,pattern) returns a slice of matching substrings. Practical case: It can be used to match the domain name in the email address, for example: email:="user@example.com", pattern:=@([^\s]+)$ to get the domain name match[1].
Transforming from front-end to back-end development, is it more promising to learn Java or Golang?
Apr 02, 2025 am 09:12 AM
Backend learning path: The exploration journey from front-end to back-end As a back-end beginner who transforms from front-end development, you already have the foundation of nodejs,...
How to use predefined time zone with Golang?
Jun 06, 2024 pm 01:02 PM
Using predefined time zones in Go includes the following steps: Import the "time" package. Load a specific time zone through the LoadLocation function. Use the loaded time zone in operations such as creating Time objects, parsing time strings, and performing date and time conversions. Compare dates using different time zones to illustrate the application of the predefined time zone feature.
Golang framework development practical tutorial: FAQs
Jun 06, 2024 am 11:02 AM
Go framework development FAQ: Framework selection: Depends on application requirements and developer preferences, such as Gin (API), Echo (extensible), Beego (ORM), Iris (performance). Installation and use: Use the gomod command to install, import the framework and use it. Database interaction: Use ORM libraries, such as gorm, to establish database connections and operations. Authentication and authorization: Use session management and authentication middleware such as gin-contrib/sessions. Practical case: Use the Gin framework to build a simple blog API that provides POST, GET and other functions.
