const fs = require('fs');

    /**
     * 生成目录
     * @author Hiki
     * 
     * @param dir 目录
     * 
     * @return Boolean
     */
    async mkdir(dir){
        if( !fs.existsSync(dir) )
            {
                try{
                    fs.mkdirSync(dir);
                    return true;
                }catch(e){
                    console.log(e);
                    return false;
                }
        }
        return true;
    }

        let dir = `app/public/upload/${number}/pics`
        //将地址分割成迭代的数组
        let dirArr = dir.split("/");
        let length = dirArr.length;
        for( let i = 1; i < length; i++){
            dirArr[i] = dirArr[i-1] + '/' + dirArr[i];
        }
        
        for( let n in dirArr){
            await this.mkdir(dirArr[n]);
        }