A simple method to cache web requests.

WebCache.java

import java.io.*;
import java.net.URL;
import java.net.URLEncoder;

/**
 * @author Patrick Lorio
 */
public class WebCache {
    public static InputStream GetWeb(String url) throws IOException {
        File file = new File("cache/" + URLEncoder.encode(url, "UTF-8"));
        if (file.exists()) {
            return new FileInputStream(file);
        }

        OutputStream cacheStream = new FileOutputStream(file);
        InputStream webStream = new URL(url).openStream();

        return new InputStream() {
            @Override
            public int read() throws IOException {
                int value = webStream.read();
                cacheStream.write(value);
                return value;
            }

            @Override
            public void close() throws IOException {
                super.close();
                cacheStream.close();
                webStream.close();
            }
        };
    }
}