import java.io.*;

import java.util.ArrayList;

import java.util.HashMap;

import java.util.List;

import java.util.Map;

public class HtmlMerger {

public static void mergeHtmls(List<String> htmlFiles, String outputHtmlFile) throws IOException {

// Create a map to store unique HTML snippets, indexed by a simple hash.

Map<String, String> htmlCache = new HashMap<>();

try (BufferedWriter writer = new BufferedWriter(new FileWriter(outputHtmlFile))) {

for (String htmlFile : htmlFiles) {

try (BufferedReader reader = new BufferedReader(new FileReader(htmlFile))) {

String htmlContent = reader.readAllText();

// Generate a unique hash for the HTML content. Simple hash for demo.

String htmlHash = generateHash(htmlContent);

// Check if the HTML content is already in the cache.

if (htmlCache.containsKey(htmlHash)) {

// Reuse the cached HTML content.

writer.write(htmlCache.get(htmlHash));

} else {

// Add the HTML content to the cache.

htmlCache.put(htmlHash, htmlContent);

writer.write(htmlContent);

}

}

}

}

}

// Simple hash function for HTML content. Can be improved for better distribution.

private static String generateHash(String html) {

return String.valueOf(html.hashCode());

}

public static void main(String[] args) throws IOException {

// Example usage:

List<String> htmlFiles = new ArrayList<>();

htmlFiles.add("file1.html");

htmlFiles.add("file2.html");

htmlFiles.add("file3.html");

mergeHtmls(htmlFiles, "merged.html");

}

}