go 学习

package main

import (
    "fmt"
    "io/ioutil"
    "log"
    "net/http"

    "github.com/gin-gonic/gin"
)

// Phone asd
type Phone interface {
    call()
}

// MiPhone asd
type MiPhone struct {
}

func (miPhone MiPhone) call() {
    fmt.Println("i im xiaomi phone")
}

func main() {
    fmt.Println("start---->")
    copyFile()
    fmt.Println("end---->")
}

func copyFile() {
    read, err := ioutil.ReadFile("name.txt")
    if err != nil {
        fmt.Println("错误", err)
    }
    fmt.Println(string(read))
    ioutil.WriteFile("copy.txt", read, 0644)
}

func face() {

    var ph Phone
    ph = new(MiPhone)
    ph.call()

}

// map 类型
func runMap() {
    var object = make(map[string]string)

    object["首都"] = "北京"
    object["城市"] = "上海"
    object["京城"] = "南京"
    object["国度"] = "中国"

    for key, val := range object {
        fmt.Printf("key is %s val； is %s", key, val)
        fmt.Println("")
    }

    delete(object, "首都")
    delete(object, "国度")

    fmt.Println("----")
    fmt.Println("已删除")
    fmt.Println("----")

    for key, val := range object {
        fmt.Printf("key is %s val； is %s", key, val)
        fmt.Println("")
    }
}

// foreach range 循环
func foreach() {
    var list = []int{1, 2, 3, 4, 5, 6, 7, 8, 9}

    for index, item := range list {
        fmt.Println("index->", index, "item", item)
    }
}

// arr 切片
func arr() {
    s := []int{1, 2, 3, 4, 5, 6}

    fmt.Println("ss", s[2:4])

}

// run gin接口
func run() {

    r := gin.Default()

    r.GET("/test", func(c *gin.Context) {
        c.JSON(200, gin.H{
            "data": "success",
        })
    })
    r.GET("/query", func(c *gin.Context) {
        name := c.DefaultQuery("name", "taoqun")
        age := c.Query("age")

        c.JSON(200, gin.H{
            "name": name,
            "age":  age,
        })
    })
    r.GET("/params/:name", func(c *gin.Context) {
        name := c.Param("name")
        lastname := c.Request.URL.Query().Get("lastname")
        message := "name is " + name + " last name is " + lastname
        c.String(200, message)
    })
    // form-data 格式 PostForm
    r.POST("/form", func(c *gin.Context) {
        name := c.PostForm("name")
        age := c.DefaultPostForm("age", "18")
        message := "name is " + name + " age is " + age
        fmt.Println(message)
        c.String(http.StatusOK, message)
    })

    r.POST("/json", func(c *gin.Context) {
        name := c.Request.FormValue("name")
        message := "name is " + name
        c.String(http.StatusOK, message)
    })

    r.POST("/upload", func(c *gin.Context) {
        file, _ := c.FormFile("file")
        c.SaveUploadedFile(file, "upload/"+file.Filename)
        fmt.Println(file.Filename)
        c.JSON(http.StatusOK, gin.H{
            "file": "/upload/" + file.Filename,
        })
    })

    r.POST("/uploadMulti", func(c *gin.Context) {
        form, _ := c.MultipartForm()
        files := form.File["upload[]"]

        var list []string

        for _, file := range files {
            log.Println(file.Filename)
            list = append(list, "upload/"+file.Filename)
            c.SaveUploadedFile(file, "upload/"+file.Filename)
        }
        c.JSON(http.StatusOK, gin.H{
            "status": 1,
            "data":   list,
            "len":    len(list),
        })
    })

    fmt.Println("http://localhost:8080")
    r.Run(":3000")
}