HTTPS by default for a single website on Apache - apache

Question

I have a WAMP server with a few sites on it. I would like to enable SSL for default for only one of the sites.
While the https://www.example.com is accessible, there is no auto redirect happening for http://www.example.com.
Also httpd -t shows Syntax Ok
Please help.
This is my httpd-vhosts.conf file
<VirtualHost *:80>
ServerName example.com
ServerAlias www.example.com
RewriteEngine On
RewriteRule ^(.*)$ https://%{HTTP_HOST}$1 [R=301,L]
</VirtualHost>
<VirtualHost *:80>
ServerAdmin hi#santo.sh
DocumentRoot "C:/wamp/www/example"
ServerName http://manage.example.com/
ServerAlias http://manage.example.com/
</VirtualHost>
<VirtualHost *:443>
ServerAdmin hi#santo.sh
DocumentRoot "c:/wamp/www/example/public"
ServerName example.com
ServerAlias www.example.com
SSLEngine on
SSLCertificateFile "C:/wamp/OpenSSL/cert/sslcert.cert"
SSLCertificateKeyFile "C:/wamp/OpenSSL/certs/mydomain.key"
</VirtualHost>

Answer 1

This questions was answered well on ServerFault
This part is wrong.
RewriteEngine On
RewriteRule ^(.*)$ https://%{HTTP_HOST}$1 [R=301,L]
While there are many choices available: here's the best one:
<VirtualHost *:80>
ServerName example.com
ServerAlias www.example.com
# [ Http to Https ]
Redirect 301 / https://www.example.com/
</VirtualHost>