Golang模板渲染实战技巧

package main

import (
    "os"
    "text/template"
)

type User struct {
    Name  string
    Email string
}

func main() {
    t := template.New("user")
    t, _ = t.Parse("Hello, {{.Name}}! Your email is {{.Email}}.\n")
    
    user := User{Name: "Alice", Email: "alice@example.com"}
    t.Execute(os.Stdout, user)
}

tpl := `
{{range .}}
  {{if .Active}}
    Active user: {{.Name}}
  {{else}}
    Inactive user: {{.Name}}
  {{end}}
{{end}}
`

type Person struct {
    Name   string
    Active bool
}

users := []Person{
    {Name: "Bob", Active: true},
    {Name: "Charlie", Active: false},
}

t := template.Must(template.New("status").Parse(tpl))
t.Execute(os.Stdout, users)

const master = `
{{define "T1"}}Hello, {{.}}{{end}}
{{define "T2"}}Goodbye, {{.}}{{end}}

{{template "T1" "Alice"}}
{{template "T2" "Bob"}}
`

template.Must(template.New("main").Parse(master)).Execute(os.Stdout, nil)

funcMap := template.FuncMap{
    "len": func(s string) int {
        return len(s)
    },
}

t := template.New("demo").Funcs(funcMap)
t, _ = t.Parse("Length of '{{.}}' is {{len .}}")
t.Execute(os.Stdout, "hello")