GZIPInputStream reading line by line in java

GZIPInputStream reading line by line in java

To read lines from a GZIP-compressed file using GZIPInputStream in Java, you can wrap the GZIPInputStream with a BufferedReader to read the lines one by one. Here's an example:

import java.io.BufferedReader; import java.io.FileInputStream; import java.io.IOException; import java.io.InputStream; import java.io.InputStreamReader; import java.util.zip.GZIPInputStream; public class GZIPLineReaderExample { public static void main(String[] args) { String gzipFilePath = "path/to/your/compressed/file.gz"; try { InputStream fileInputStream = new FileInputStream(gzipFilePath); InputStream gzipInputStream = new GZIPInputStream(fileInputStream); InputStreamReader reader = new InputStreamReader(gzipInputStream); BufferedReader bufferedReader = new BufferedReader(reader); String line; while ((line = bufferedReader.readLine()) != null) { // Process each line here System.out.println(line); } bufferedReader.close(); gzipInputStream.close(); fileInputStream.close(); } catch (IOException e) { e.printStackTrace(); } } }

In this example:

  1. We open a FileInputStream for your GZIP-compressed file.
  2. We wrap the FileInputStream with a GZIPInputStream to decompress the content.
  3. We wrap the GZIPInputStream with an InputStreamReader to handle character encoding.
  4. We wrap the InputStreamReader with a BufferedReader to read lines from the decompressed stream.
  5. We read lines using bufferedReader.readLine() in a loop until null is returned, indicating the end of the file.

Remember to replace "path/to/your/compressed/file.gz" with the actual path to your GZIP-compressed file. Also, handle exceptions and close the streams properly in your production code to ensure resource cleanup and error handling.

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