1.header.tmpl
1 {{define "header"}}
2 <html>
3 <head>
4 <title>演示信息</title>
5 </head>
6 <body>
7 {{end}}
2. content.tmpl
1 {{define "content"}}
2 {{template "header"}}
3 <h1>演示嵌套</h1>
4 <ul>
5 <li>嵌套使用 define 定义子模板</li>
6 <li>调用使用 template</li>
7 </ul>
8 {{template "footer"}}
9 {{end}}
3. footer.tmpl
1 {{define "footer"}}
2 </body>
3 </html>
4 {{end}}
4. main.go
1 package main
2
3 import (
4 "fmt"
5 "html/template"
6 "os"
7 "strings"
8 )
9
10 type Person struct {
11 UserName string
12 Emails []string
13 Friends []*Friend
14 }
15
16 type Friend struct {
17 Fname string
18 }
19
20 func EmailDealWith(args ...interface{}) string {
21 ok := false
22 var s string
23 if len(args) == 1 {
24 s, ok = args[0].(string)
25 }
26 if !ok {
27 s = fmt.Sprint(args)
28 }
29 substrs := strings.Split(s, "@")
30 if len(substrs) != 2 {
31 return s
32 }
33 return (substrs[0] + " at" + substrs[1])
34 }
35
36 func main() {
37 demo1()
38 demo2()
39 demo3()
40 demo4()
41 }
42
43 func demo1() {
44 t := template.New("fieldname example")
45 t, _ = t.Parse("hello {{.UserName}}!")
46 p := Person{UserName: "zhangsan"}
47 t.Execute(os.Stdout, p)
48 }
49
50 func demo2() {
51 f1 := Friend{Fname: "minux.ma"}
52 f2 := Friend{Fname: "xushiwei"}
53 t := template.New("fieldname example")
54 t = t.Funcs(template.FuncMap{"emailDeal": EmailDealWith}) // 模版函数的使用方式
55 t, _ = t.Parse(`
56 hello {{.UserName}}!
57 {{range .Emails}}
58 an email {{.|emailDeal}}
59 {{end}}
60 {{with .Friends}}
61 {{range .}}
62 my friend name is {{.Fname}}
63 {{end}}
64 {{end}} `)
65 p := Person{UserName: "Astaxie",
66 Emails: []string{"[email protected]", "[email protected]"},
67 Friends: []*Friend{&f1, &f2}}
68 t.Execute(os.Stdout, p)
69 }
70
71 func demo3() {
72 tEmpty := template.New("template test")
73 // Must 它的作用是检测模板是否正确，例如大括号是否匹配，注释是否正确的关闭，变量是否正确的书写
74 tEmpty = template.Must(tEmpty.Parse("空 pipeline if demo:{{if ``}}不回输出.{{end}}\n"))
75 tEmpty.Execute(os.Stdout, nil)
76
77 tWithValue := template.New("template test")
78 tWithValue = template.Must(tWithValue.Parse("不为空的 pipeline if demo: {{if `anything`}} 我有内容，我会输出. {{end}}\n"))
79 tWithValue.Execute(os.Stdout, nil)
80
81 tIfElse := template.New("template test")
82 tIfElse = template.Must(tIfElse.Parse("if-else demo:{{if `anything`}} if 部分 {{else}} else 部分.{{end}}\n"))
83 tIfElse.Execute(os.Stdout, nil)
84 }
85
86 func demo4() {
87 s1, _ := template.ParseFiles("header.tmpl", "content.tmpl", "footer.tmpl")
88 s1.ExecuteTemplate(os.Stdout, "header", nil)
89 fmt.Println()
90 s1.ExecuteTemplate(os.Stdout, "content", nil)
91 fmt.Println()
92 s1.ExecuteTemplate(os.Stdout, "footer", nil)
93 fmt.Println()
94 s1.Execute(os.Stdout, nil)
95 }
时间： 2024-10-21 00:08:11