Apache环境:

网站根目录 .htaccess  文件添加:

RewriteRule /文件夹名称/(.*) /文件夹名称/$1 [L]

Nginx环境:

网站域名.conf  文件添加:

location /文件夹名称/ {
    index index.html index.php;
    if (-f $request_filename/index.html){
        rewrite (.*) $1/index.html break;
    }
    if (-f $request_filename/index.php){
        rewrite (.*) $1/index.php;
    }
    if (!-f $request_filename){
        rewrite (.*) /文件夹名称/index.php;
    }
}