原创投稿--数据可视化库go-echarts

1$ cd your/gopath/src/github.com/chenjiandongx/go-echarts/example
2$ go build .
3$ ./example

 1package main
 2
 3import (
 4    "encoding/json"
 5    "fmt"
 6    "log"
 7    "net/http"
 8    "os"
 9    "path"
10
11    "github.com/chenjiandongx/go-echarts/charts"
12    "github.com/gobuffalo/packr"
13)
14
15var sankeyNode = []charts.SankeyNode{
16    {Name: "category1"},
17    {Name: "category2"},
18    {Name: "category3"},
19    {Name: "category4"},
20    {Name: "category5"},
21    {Name: "category6"},
22}
23
24var sankeyLink = []charts.SankeyLink{
25    {Source: "category1", Target: "category2", Value: 10},
26    {Source: "category2", Target: "category3", Value: 15},
27    {Source: "category3", Target: "category4", Value: 20},
28    {Source: "category5", Target: "category6", Value: 25},
29}
30
31func sankeyBase() *charts.Sankey {
32    sankey := charts.NewSankey()
33    sankey.SetGlobalOptions(charts.TitleOpts{Title: "Sankey-示例图"})
34    sankey.Add("sankey", sankeyNode, sankeyLink, charts.LabelTextOpts{Show: true})
35    return sankey
36}
37
38func graphEnergy() *charts.Sankey {
39    sankey := charts.NewSankey()
40    sankey.SetGlobalOptions(charts.TitleOpts{Title: "Sankey-官方示例"})
41    box := packr.NewBox(path.Join(".", "fixtures"))
42    f, err := box.Find("energy.json")
43    if err != nil {
44        log.Fatal(err)
45    }
46    type Data struct {
47        Nodes []charts.SankeyNode
48        Links []charts.SankeyLink
49    }
50
51    var data Data
52    if err := json.Unmarshal(f, &data); err != nil {
53        fmt.Println(err)
54    }
55    sankey.Add("sankey", data.Nodes, data.Links,
56        charts.LineStyleOpts{Curveness: 0.5, Color: "source"},
57        charts.LabelTextOpts{Show: true},
58    )
59    return sankey
60}
61
62func sankeyHandler(w http.ResponseWriter, _ *http.Request) {
63    page := charts.NewPage(orderRouters("sankey")...)
64    page.Add(
65        sankeyBase(),
66        graphEnergy(),
67    )
68    f, err := os.Create(getRenderPath("sankey.html"))
69    if err != nil {
70        log.Println(err)
71    }
72    page.Render(w, f)
73}