go-echarts
chart 包是一个简单的本地图表库，支持时间序列和连续折线。是数据可视化第三方库。
安装
$ go get -u github.com/go-echarts/go-echarts/... # 因为 gomod 的特殊的版本管理方式，使用 go get 方式并不能直接使用 v2 go-echarts 🐶 # 不过可以通过以下方法使用新版本... $ cd $go-echarts-project $ mkdir v2 && mv charts components datasets opts render templates types v2
go.mod
require github.com/go-echarts/go-echarts/v2
echart 特性
- 简洁的 API 设计，使用如丝滑般流畅
- 囊括了 25+ 种常见图表，应有尽有
- 高度灵活的配置项，可轻松搭配出精美的图表
- 详细的文档和示例，帮助开发者更快地上手项目
- 多达 400+ 地图，为地理数据可视化提供强有力的支持
直方图：
package go_chart import ( "math/rand" "os" "testing" "github.com/go-echarts/go-echarts/v2/charts" "github.com/go-echarts/go-echarts/v2/opts" ) //generate random data for bar chart func generateBarItems() []opts.BarData { items := make([]opts.BarData, 0) for i := 0; i < 7; i++ { items = append(items, opts.BarData{Value: rand.Intn(300)}) } return items } func TestBar(t *testing.T) { // create a new bar instance bar := charts.NewBar() // set some global options like Title/Legend/ToolTip or anything else bar.SetGlobalOptions(charts.WithTitleOpts(opts.Title{ Title: "My first bar chart generated by go-echarts", Subtitle: "It's extremely easy to use, right?", })) // Put data into instance bar.SetXAxis([]string{"Mon", "Tue", "Wed", "Thu", "Fri", "Sat", "Sun"}). AddSeries("Category A", generateBarItems()). AddSeries("Category B", generateBarItems()) // Where the magic happens f, _ := os.Create("bar.html") bar.Render(f) }
运行结果：
饼图
package go_chart import ( "math/rand" "os" "testing" "github.com/go-echarts/go-echarts/v2/charts" "github.com/go-echarts/go-echarts/v2/opts" ) var ( itemCntPie = 4 seasons = []string{"Spring", "Summer", "Autumn ", "Winter"} ) func generatePieItems() []opts.PieData { items := make([]opts.PieData, 0) for i := 0; i < itemCntPie; i++ { items = append(items, opts.PieData{Name: seasons[i], Value: rand.Intn(100)}) } return items } func pieBase() *charts.Pie { pie := charts.NewPie() pie.SetGlobalOptions( charts.WithTitleOpts(opts.Title{Title: "basic pie example"}), ) pie.AddSeries("pie", generatePieItems()) return pie } func pieShowLabel() *charts.Pie { pie := charts.NewPie() pie.SetGlobalOptions( charts.WithTitleOpts(opts.Title{Title: "label options"}), ) pie.AddSeries("pie", generatePieItems()). SetSeriesOptions(charts.WithLabelOpts( opts.Label{ Show: true, Formatter: "{b}: {c}", }), ) return pie } func pieRadius() *charts.Pie { pie := charts.NewPie() pie.SetGlobalOptions( charts.WithTitleOpts(opts.Title{Title: "Radius style"}), ) pie.AddSeries("pie", generatePieItems()). SetSeriesOptions( charts.WithLabelOpts(opts.Label{ Show: true, Formatter: "{b}: {c}", }), charts.WithPieChartOpts(opts.PieChart{ Radius: []string{"40%", "75%"}, }), ) return pie } func pieRoseArea() *charts.Pie { pie := charts.NewPie() pie.SetGlobalOptions( charts.WithTitleOpts(opts.Title{ Title: "Rose(Area)", }), ) pie.AddSeries("pie", generatePieItems()). SetSeriesOptions( charts.WithLabelOpts(opts.Label{ Show: true, Formatter: "{b}: {c}", }), charts.WithPieChartOpts(opts.PieChart{ Radius: []string{"40%", "75%"}, RoseType: "area", }), ) return pie } func pieRoseRadius() *charts.Pie { pie := charts.NewPie() pie.SetGlobalOptions( charts.WithTitleOpts(opts.Title{ Title: "Rose(Radius)", }), ) pie.AddSeries("pie", generatePieItems()). SetSeriesOptions( charts.WithLabelOpts(opts.Label{ Show: true, Formatter: "{b}: {c}", }), charts.WithPieChartOpts(opts.PieChart{ Radius: []string{"30%", "75%"}, RoseType: "radius", }), ) return pie } func pieRoseAreaRadius() *charts.Pie { pie := charts.NewPie() pie.SetGlobalOptions( charts.WithTitleOpts(opts.Title{ Title: "Rose(Area/Radius)", }), ) pie.AddSeries("area", generatePieItems()). SetSeriesOptions( charts.WithPieChartOpts(opts.PieChart{ Radius: []string{"30%", "75%"}, RoseType: "area", Center: []string{"25%", "50%"}, }), ) pie.AddSeries("pie", generatePieItems()). SetSeriesOptions( charts.WithLabelOpts(opts.Label{ Show: true, Formatter: "{b}: {c}", }), charts.WithPieChartOpts(opts.PieChart{ Radius: []string{"30%", "75%"}, RoseType: "radius", Center: []string{"75%", "50%"}, }), ) return pie } func pieInPie() *charts.Pie { pie := charts.NewPie() pie.SetGlobalOptions( charts.WithTitleOpts(opts.Title{ Title: "pie in pie", }), ) pie.AddSeries("area", generatePieItems(), charts.WithLabelOpts(opts.Label{ Show: true, Formatter: "{b}: {c}", }), charts.WithPieChartOpts(opts.PieChart{ Radius: []string{"50%", "55%"}, RoseType: "area", }), ) pie.AddSeries("radius", generatePieItems(), charts.WithPieChartOpts(opts.PieChart{ Radius: []string{"0%", "45%"}, RoseType: "radius", }), ) return pie } type PieExamples struct{} //func TestPie(t *testing.T) { // //(PieExamples) // page := components.NewPage() // page.AddCharts( // pieBase(), // pieShowLabel(), // pieRadius(), // pieRoseArea(), // pieRoseRadius(), // pieRoseAreaRadius(), // pieInPie(), // ) // f, err := os.Create("examples/html/pie.html") // if err != nil { // panic(err) // } // page.Render(io.MultiWriter(f)) //} func TestPie(t *testing.T) { // create a new bar instance pie := pieBase() // Where the magic happens f, _ := os.Create("pie.html") pie.Render(f) }
