Exercises Java with Examples-
Practice Exercises Java 4,5 5 302940

Sitemap creator - Practice Exercises Java


Lesson 12:

Additional libraries


Exercise 12.5:

Sitemap creator


Objetive:

A "sitemap" is a file that webmasters can use in order to tell Google the webpages that their site consists on, and get a better positioning in the search engine.

Its basic appearance is:

<?xml version="1.0" encoding="utf-8" ?>
<urlset xmlns="https://www.sitemaps.org/schemas/sitemap/0.9">
    <url>
        <loc>https://miweb.com/</loc>
        <lastmod>2013-03-18</lastmod>
        <changefreq>daily</changefreq>
    </url>
    <url>
        <loc>https://miweb.com/apartado1</loc>
        <lastmod>2013-03-18</lastmod>
        <changefreq>daily</changefreq>
    </url>
</urlset>


Yo must create a program to show on screen the contents of a preliminary "sitemap", taken from the list of ".html" files in the current directory, with "weekly" frequence and the current date as "last modification" date.


Source Code:


import java.util.*;
public class Main
{
	static void main(String[] args)
	{
		ArrayList ListHtml = GetHtml();

		CreateSiteMap(ListHtml, "weekly", java.time.LocalDateTime.now());
	}

	private static void CreateSiteMap(ArrayList listHtml, String frecuency, java.time.LocalDateTime lastUpdated)
	{
		try
		{
			java.io.FileWriter writer = new java.io.OutputStreamWriter(File.Create("sitemap.xml"));

			writer.write("" + System.lineSeparator());
			writer.write("" + System.lineSeparator());

			for (String html : listHtml)
			{
				writer.write("" + System.lineSeparator());
				writer.write("" + html + "" + System.lineSeparator());
				writer.write("" + lastUpdated.ToShortDateString() + "" + System.lineSeparator());
				writer.write("" + frecuency + "" + System.lineSeparator());
				writer.write("" + System.lineSeparator());
			}

			writer.write("" + System.lineSeparator());

			writer.close();
		}
		catch (java.lang.Exception e)
		{
			System.out.println("Error writing sitemap.");
		}
	}

	private static ArrayList GetHtml()
	{
		ArrayList ListHtml = new List();

		String[] files = (new java.io.File(".")).list(java.io.File::isFile);

		for (String file : files)
		{
			String extension = Path.GetExtension(file);

			switch (extension)
			{
				case ".html":
				case ".htm":
					ListHtml.add(file.substring(2));
					break;
			}
		}

		return ListHtml;
	}
}
Exercisey 12.5

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