Prepare googlesitemap.gz a Google Spidering sitemap.

To speed spidering, and ensure the most important files get
spidered frequently, Google has created a system where you
leave a compressed catalog of all your files on the website
for it to find. The program creates that file.
https://www.google.com/webmasters/sitemaps/docs/en/faq.html

For it to take effect, in this beta program, you must
register your site and the name of the file with Google.

To use the program, you must configure three files:
sitemapconfig.properties : defines where you website files
are. See the sample.

files.csv : defines files you want google to handle
specially. They have comma-separated fields

1. directory (relative to root of website, root is blank)

2. file (including .html)

3. frequency of update, e.g. weekly

4. priority.

You may not include comments. The meaning of the frequency
and priority fields are defined at
https://www.google.com/webmasters/sitemaps/docs/en/faq.html.
The program automatically generates the lastmod.

directories.csv : defines which directories you want google
to look at, and some facts about them. All files in each directory
will be treated the same way, unless there is a special
entry for it in files.csv. It has comma-separated fields:

1. directory (relative to root of website, root is blank)

2. frequency of update, e.g. weekly

3. priority.

The program looks in the current working directory for all three files.

You invoke it with:

java -jar sitemap.jar

Full source is included.