Golang实现图片上传与展示教程

  
  上传图片

func uploadHandler(w http.ResponseWriter, r *http.Request) {
    if r.Method != "POST" {
        http.Error(w, "只支持 POST 请求", http.StatusMethodNotAllowed)
        return
    }

    // 解析 multipart 表单，最大内存 10MB
    r.ParseMultipartForm(10 

os.MkdirAll("uploads", os.ModePerm)

// 将 /images/ 路由指向 uploads 目录
http.Handle("/images/", http.StripPrefix("/images/", http.FileServer(http.Dir("uploads/"))))

// 示例访问：http://localhost:8080/images/filename.jpg

func listImages(w http.ResponseWriter, r *http.Request) {
    files, _ := filepath.Glob("uploads/*")
    var imageLinks string
    for _, f := range files {
        filename := filepath.Base(f)
        imageLinks += fmt.Sprintf("", filename)
    }
    fmt.Fprintf(w, "
已上传图片
%s", imageLinks)
}

package main

import (
    "fmt"
    "io"
    "net/http"
    "os"
    "path/filepath"
)

func main() {
    os.MkdirAll("uploads", os.ModePerm)

    http.HandleFunc("/upload", uploadHandler)
    http.HandleFunc("/images", listImages)
    http.Handle("/images/", http.StripPrefix("/images/", http.FileServer(http.Dir("uploads/"))))

    fmt.Println("服务器启动在 :8080")
    http.ListenAndServe(":8080", nil)
}