go实现多个文件上传

// UploadCodeHandler 上传代码
func UploadCodeHandler(c *gin.Context){
    userId := c.PostForm("userId")
    projectId := c.PostForm("projectId")
    fmt.Println(userId)
    //Source
    form,err:=c.MultipartForm()
    //错误处理
    if err != nil {
        c.JSON(http.StatusBadRequest, gin.H{
            "status": -1,
            "error": err,
        })
    }else {
        //var fileUploadStatus []common.FileUploadStatus
        files :=form.File["file"]
        var fileUploadStatus =make([]common.FileUploadStatus,len(files))
        fmt.Println(len(files))
        if userId !="" && len(files)!=0 {
            var uploadT = "code"
            var filePaths =make([]string,len(files))
            fmt.Println(filePaths)
            for key,f:=range files{
                fmt.Println(key)
                fmt.Println(f.Filename)
                fmt.Println("**************************")
                fmt.Println(f.Header.Get("Content-Type"))
                //c.SaveUploadedFile(f,f.Filename)
                //fmt.Println(f.Header.Values("Content-Type")[0])
                c.SaveUploadedFile(f,"./dataset/"+uploadT+"/"+f.Filename)
                filePaths[key]="./dataset/"+uploadT+"/"+f.Filename
                contentType :=f.Header.Get("Content-Type")
                //contentType:="application/pdf"
                fileIsExist :=db.CodeFileIsExist(f.Filename)
                if fileIsExist==0{
                    userIdInt, _ := strconv.Atoi(userId)
                    db.AddCodeFile(userIdInt,f.Filename,contentType,projectId)
                    fileUploadStatus[key].Filename=f.Filename
                    fileUploadStatus[key].Status="上传成功！"
                    //c.JSON(http.StatusOK, gin.H{
                    //    "status": 1,
                    //    "message":filePaths,
                    //})
                }else {
                    fileUploadStatus[key].Filename=f.Filename
                    fileUploadStatus[key].Status="文件已经存在！"
                    //c.JSON(http.StatusOK, gin.H{
                    //    "status": 2,
                    //    "message":"文件已经存在！",
                    //})
                }
            }
            c.JSON(http.StatusOK, gin.H{"status": 1, "message":fileUploadStatus})
        }else {
            c.JSON(http.StatusOK, gin.H{"status": -1, "message":"参数传递有误!"})
        }
    }
}