read zip file | read html file from zip | read zipfile in java

read zip file | read html file from zip | read zipfile in java

In java we can read .zip file without extracting zip file manually.

this tutorial help you to read html file without extracting zip file in java .
also you read text/.txt/png file without extracting zip file in java.

Note : set your full zip file path (with .zip extention)

Require Lib : FileUtils

Example :-

package ReaderTestDemo;

import java.awt.image.BufferedImage;
import java.io.BufferedReader;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.Enumeration;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;
import javax.imageio.ImageIO;
import org.apache.commons.io.FilenameUtils;

/**
 *
 * @author vishal.khokhar
 */
public class ReaderTest {

    public static void main(String[] args) throws Exception {
    String path="C:/Documents and Settings/vishal/Desktop/2017-11-23.zip";
        ZipFile zip = new ZipFile(path);

        for (Enumeration e = zip.entries(); e.hasMoreElements();) {
            ZipEntry entry = (ZipEntry) e.nextElement();
            if (!entry.isDirectory()) {
                if (FilenameUtils.getExtension(entry.getName()).equals("png")) {
                    byte[] image = getImage(zip.getInputStream(entry));
                } else if (FilenameUtils.getExtension(entry.getName()).equals("html")) {
                    StringBuilder document = getHtmlFile(zip.getInputStream(entry));
                    System.out.println(document.toString());
                } else if (FilenameUtils.getExtension(entry.getName()).equals("txt")) {
                    StringBuilder textContent = readTextFiles(zip.getInputStream(entry));
                    System.out.println(textContent.toString());
                }
            }
        }
    }

    public static StringBuilder getHtmlFile(InputStream in) {
        StringBuilder htmlData = new StringBuilder();
        BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(in));
        String line;
        try {
            while ((line = bufferedReader.readLine()) != null) {
                htmlData.append(line).append("\n");
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
        return htmlData;
    }

    public static byte[] getImage(InputStream in) {
        try {
            BufferedImage bufferedImage = ImageIO.read(in);
            ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
            ImageIO.write(bufferedImage, "png", byteArrayOutputStream);
            return byteArrayOutputStream.toByteArray();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return null;
    }
   
    private static StringBuilder readTextFiles(InputStream in) {
        StringBuilder textData = new StringBuilder();
        BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(in));
        String line;
        try {
            while ((line = bufferedReader.readLine()) != null) {
                textData.append(line);
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
        return textData;
    }
      
}