Golang 模板基础语法范例
2017-06-28 02:56
435 查看
匿名对象字段值
package main
import (
"html/template"
"os"
"time"
)
func main() {
stus := struct {
Name string
Birth time.Time
Age int
}{
Name: "Swallow", Birth: time.Unix(534182400, 0), Age: 30,
}
t := template.Must(template.New("testing").Parse(`{{.Birth}} *** {{.Age}}`))
t.Execute(os.Stdout, stus)
}
Map ------ 在template中key没有空格
package main
import (
"html/template"
"os"
)
func main() {
data := map[string]bool{
"Jack": true,
"Jason": false,
"Jim": false,
}
t := template.Must(template.New("testing").Parse(`Married: Jack:{{ .Jack}}; Jim:{{ .Jim}}`))
t.Execute(os.Stdout, data)
}
Map ------ 在template中key有空格，必须用index
package main
import (
"html/template"
"os"
)
func main() {
data := map[string]bool{
"Jack Chen": true,
"YangFan": false,
}
t := template.Must(template.New("testing").Parse(`Married: Jack Chen:{{index . "Jack Chen"}}; YangFan:{{ .YangFan}}`))
t.Execute(os.Stdout, data)
}
数组/切片
import (
"html/template"
"os"
)
func main() {
data := []string{"Jack Chen", "YangFan", "Tim", "Jason", "Tina"}
t := template.Must(template.New("test").Parse("Teacher List:" + "{{range .}}" + "\n{{.}};" + "{{end}}"))
t.Execute(os.Stdout, data)
}
自定义变量
package main
import (
"html/template"
"os"
)
func main() {
data := []string{"Jack Chen", "YangFan", "Tim", "Jason", "Tina"}
t := template.Must(template.New("test").Parse("Students List:" + "{{range $index, $_ := .}}" + "\n{{$index}}). {{.}}," + "{{end}}"))
t.Execute(os.Stdout, data)
}
条件查询
package main
import (
"html/template"
"os"
)
func main() {
//p := "Jack Chen"
p := "Tina"
t := template.Must(template.New("test").Parse(`{{if eq . "Jack Chen"}} Jack Chen is Man {{else if eq . "Tina"}} Tina is Woman {{end}}`))
t.Execute(os.Stdout, p)
}
转义
package main
import (
"html/template"
"os"
)
func main() {
//p := "Jack Chen"
p := "Tina"
t := template.Must(template.New("test").Parse(`<a href="/search?name={{.}}">{{.}}</a>`))
t.Execute(os.Stdout, p)
}
转义
package main
import (
"html/template"
"os"
)
func main() {
p := "Jack Chen"
//p := "Tina"
t := template.Must(template.New("test").Parse(`<a href="/search?name={{. | urlquery}}">{{. | html}}</a>`))
t.Execute(os.Stdout, p)
}
转义
package main
import (
"html/template"
"os"
)
func main() {
js := "<script>"
t := template.Must(template.New("test").Parse("{{. | urlquery}} and {{. | html}}"))
t.Execute(os.Stdout, js)
}
模板重构 ------ [b]自定义方法
[/b]
package main
import (
"html/template"
"os"
)
func IsBoolean(b bool) bool {
return b
}
func main() {
funcs := template.FuncMap{
"status": func(b bool) bool { return b },
}
t := template.New("test").Funcs(funcs)
template.Must(t.Parse("{{if status .}} Go Code is running! {{ else }} Go Code is running appear panic! {{end}}"))
t.Execute(os.Stdout, false)
}
模板重构 ------ 嵌套模板
package main
import (
"html/template"
"os"
)
type Student struct {
Name string
Age int
}
func main() {
s := &Student{Name: "Jack Chen", Age: 30}
t := template.New("test")
// parent template
template.Must(t.Parse(`Name: {{.Name}} is from parent; {{template "age" .Age}} is from child`))
// child template
template.Must(t.Parse(`{{define "age"}}Age: {{.}}{{end}}`))
t.Execute(os.Stdout, s)
}
Session接口对象如何输出到 Golang的Template中：
/root/code/go/src/contoso.org/hello/main.go
package main
import (
"crypto/md5"
"encoding/json"
"fmt"
"html/template"
"io"
"log"
"net/http"
"time"
"github.com/astaxie/beego/session"
)
var globalSessions *session.Manager
func init() {
config := `{"cookieName":"gosessionid","gclifetime":3600,"enableSetCookie":true}`
conf := new(session.ManagerConfig)
if err := json.Unmarshal([]byte(config), conf); err != nil {
log.Fatal("json decode error", err)
}
globalSessions, _ = session.NewManager("memory", conf)
go globalSessions.GC()
}
func main() {
http.HandleFunc("/count", count) //设置访问的路由
err := http.ListenAndServe(":9090", nil) //设置监听的端口
if err != nil {
log.Fatal("ListenAndServe: ", err)
}
}
//网站访问计数器
func count(w http.ResponseWriter, r *http.Request) {
fmt.Println("Requesting Addr 2: ", r.URL.Path)
//忽略此路由地址请求：http://127.0.0.1:9090/favicon.ico
if r.URL.Path != "/favicon.ico" {
sess, _ := globalSessions.SessionStart(w, r)
ct := sess.Get("countnum")
if ct == nil {
sess.Set("countnum", 1)
fmt.Println("Count SessionID = ", sess.SessionID())
} else {
sess.Set("countnum", (ct.(int) + 1))
fmt.Println("Count SessionID = ", sess.SessionID())
}
t, _ := template.ParseFiles("count.gtpl")
w.Header().Set("Content-Type", "text/html")
fmt.Println("\n ****** Request Header: ******")
for k, v := range r.Header {
fmt.Println(k, " = ", v) //v是[]string,输出值带有中括号
}
fmt.Println("\n ****** Response Header: ******")
for k, v := range w.Header() {
fmt.Println(k, " = ", v) //v是[]string,输出值带有中括号
}
fmt.Println(" ======================================================================= ")
h := md5.New()
salt := "lengrubing%^7&8888"
io.WriteString(h, salt+time.Now().String())
token := fmt.Sprintf("%x", h.Sum(nil))
if r.Form.Get("token") != token {
//提示登录
}
sess.Set("token", token)
//自定义一个匿名对象data，sess.Get返回的是个接口，必须指明该返回值的类型，
//注意匿名对象初始化时，每行必须，是必须要有一个逗号
data := struct {
Token string
Count int
}{
sess.Get("token").(string),
sess.Get("countnum").(int),
}
t.Execute(w, data)
}
}
/root/code/go/src/contoso.org/hello/count.gtpl
<!DOCTYPE html>
<html>
<head>
<title>计数器 - 以及Session接口对象如何输出到模板内对应的标签中</title>
<meta http-equiv="Content-Type" content="text/html" charset="utf-8">
<meta name="keywords" content="关键词1,关键词2">
<meta name="description" content="">
</head>
<body>
<div>
Token:<input type="text" name="token" value={{.Token}}><br>
Count:<input type="text" name="count" value={{.Count}}><br>
自定义匿名对象：{{.}}
</dev>
</body>
</html>
更多范例正在更新中 。。。。。。
package main
import (
"html/template"
"os"
"time"
)
func main() {
stus := struct {
Name string
Birth time.Time
Age int
}{
Name: "Swallow", Birth: time.Unix(534182400, 0), Age: 30,
}
t := template.Must(template.New("testing").Parse(`{{.Birth}} *** {{.Age}}`))
t.Execute(os.Stdout, stus)
}
Map ------ 在template中key没有空格
package main
import (
"html/template"
"os"
)
func main() {
data := map[string]bool{
"Jack": true,
"Jason": false,
"Jim": false,
}
t := template.Must(template.New("testing").Parse(`Married: Jack:{{ .Jack}}; Jim:{{ .Jim}}`))
t.Execute(os.Stdout, data)
}
Map ------ 在template中key有空格，必须用index
package main
import (
"html/template"
"os"
)
func main() {
data := map[string]bool{
"Jack Chen": true,
"YangFan": false,
}
t := template.Must(template.New("testing").Parse(`Married: Jack Chen:{{index . "Jack Chen"}}; YangFan:{{ .YangFan}}`))
t.Execute(os.Stdout, data)
}
数组/切片
import (
"html/template"
"os"
)
func main() {
data := []string{"Jack Chen", "YangFan", "Tim", "Jason", "Tina"}
t := template.Must(template.New("test").Parse("Teacher List:" + "{{range .}}" + "\n{{.}};" + "{{end}}"))
t.Execute(os.Stdout, data)
}
自定义变量
package main
import (
"html/template"
"os"
)
func main() {
data := []string{"Jack Chen", "YangFan", "Tim", "Jason", "Tina"}
t := template.Must(template.New("test").Parse("Students List:" + "{{range $index, $_ := .}}" + "\n{{$index}}). {{.}}," + "{{end}}"))
t.Execute(os.Stdout, data)
}
条件查询
package main
import (
"html/template"
"os"
)
func main() {
//p := "Jack Chen"
p := "Tina"
t := template.Must(template.New("test").Parse(`{{if eq . "Jack Chen"}} Jack Chen is Man {{else if eq . "Tina"}} Tina is Woman {{end}}`))
t.Execute(os.Stdout, p)
}
转义
package main
import (
"html/template"
"os"
)
func main() {
//p := "Jack Chen"
p := "Tina"
t := template.Must(template.New("test").Parse(`<a href="/search?name={{.}}">{{.}}</a>`))
t.Execute(os.Stdout, p)
}
转义
package main
import (
"html/template"
"os"
)
func main() {
p := "Jack Chen"
//p := "Tina"
t := template.Must(template.New("test").Parse(`<a href="/search?name={{. | urlquery}}">{{. | html}}</a>`))
t.Execute(os.Stdout, p)
}
转义
package main
import (
"html/template"
"os"
)
func main() {
js := "<script>"
t := template.Must(template.New("test").Parse("{{. | urlquery}} and {{. | html}}"))
t.Execute(os.Stdout, js)
}
模板重构 ------ [b]自定义方法
[/b]
package main
import (
"html/template"
"os"
)
func IsBoolean(b bool) bool {
return b
}
func main() {
funcs := template.FuncMap{
"status": func(b bool) bool { return b },
}
t := template.New("test").Funcs(funcs)
template.Must(t.Parse("{{if status .}} Go Code is running! {{ else }} Go Code is running appear panic! {{end}}"))
t.Execute(os.Stdout, false)
}
模板重构 ------ 嵌套模板
package main
import (
"html/template"
"os"
)
type Student struct {
Name string
Age int
}
func main() {
s := &Student{Name: "Jack Chen", Age: 30}
t := template.New("test")
// parent template
template.Must(t.Parse(`Name: {{.Name}} is from parent; {{template "age" .Age}} is from child`))
// child template
template.Must(t.Parse(`{{define "age"}}Age: {{.}}{{end}}`))
t.Execute(os.Stdout, s)
}
Session接口对象如何输出到 Golang的Template中：
/root/code/go/src/contoso.org/hello/main.go
package main
import (
"crypto/md5"
"encoding/json"
"fmt"
"html/template"
"io"
"log"
"net/http"
"time"
"github.com/astaxie/beego/session"
)
var globalSessions *session.Manager
func init() {
config := `{"cookieName":"gosessionid","gclifetime":3600,"enableSetCookie":true}`
conf := new(session.ManagerConfig)
if err := json.Unmarshal([]byte(config), conf); err != nil {
log.Fatal("json decode error", err)
}
globalSessions, _ = session.NewManager("memory", conf)
go globalSessions.GC()
}
func main() {
http.HandleFunc("/count", count) //设置访问的路由
err := http.ListenAndServe(":9090", nil) //设置监听的端口
if err != nil {
log.Fatal("ListenAndServe: ", err)
}
}
//网站访问计数器
func count(w http.ResponseWriter, r *http.Request) {
fmt.Println("Requesting Addr 2: ", r.URL.Path)
//忽略此路由地址请求：http://127.0.0.1:9090/favicon.ico
if r.URL.Path != "/favicon.ico" {
sess, _ := globalSessions.SessionStart(w, r)
ct := sess.Get("countnum")
if ct == nil {
sess.Set("countnum", 1)
fmt.Println("Count SessionID = ", sess.SessionID())
} else {
sess.Set("countnum", (ct.(int) + 1))
fmt.Println("Count SessionID = ", sess.SessionID())
}
t, _ := template.ParseFiles("count.gtpl")
w.Header().Set("Content-Type", "text/html")
fmt.Println("\n ****** Request Header: ******")
for k, v := range r.Header {
fmt.Println(k, " = ", v) //v是[]string,输出值带有中括号
}
fmt.Println("\n ****** Response Header: ******")
for k, v := range w.Header() {
fmt.Println(k, " = ", v) //v是[]string,输出值带有中括号
}
fmt.Println(" ======================================================================= ")
h := md5.New()
salt := "lengrubing%^7&8888"
io.WriteString(h, salt+time.Now().String())
token := fmt.Sprintf("%x", h.Sum(nil))
if r.Form.Get("token") != token {
//提示登录
}
sess.Set("token", token)
//自定义一个匿名对象data，sess.Get返回的是个接口，必须指明该返回值的类型，
//注意匿名对象初始化时，每行必须，是必须要有一个逗号
data := struct {
Token string
Count int
}{
sess.Get("token").(string),
sess.Get("countnum").(int),
}
t.Execute(w, data)
}
}
/root/code/go/src/contoso.org/hello/count.gtpl
<!DOCTYPE html>
<html>
<head>
<title>计数器 - 以及Session接口对象如何输出到模板内对应的标签中</title>
<meta http-equiv="Content-Type" content="text/html" charset="utf-8">
<meta name="keywords" content="关键词1,关键词2">
<meta name="description" content="">
</head>
<body>
<div>
Token:<input type="text" name="token" value={{.Token}}><br>
Count:<input type="text" name="count" value={{.Count}}><br>
自定义匿名对象：{{.}}
</dev>
</body>
</html>
更多范例正在更新中 。。。。。。
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