BAEL-7106-compress-and-uncompress-bytes (#15216)

core-java-modules/core-java-lang-6/src/main/java/com/baeldung/compressbytes/CompressByteArrayUtil.java

@@ -0,0 +1,58 @@
+package com.baeldung.compressbytes;
+
+import java.io.ByteArrayOutputStream;
+import java.util.zip.DataFormatException;
+import java.util.zip.Deflater;
+import java.util.zip.Inflater;
+
+public class CompressByteArrayUtil {
+
+    public static byte[] compress(byte[] input) {
+        Deflater deflater = new Deflater();
+        deflater.setInput(input);
+        deflater.finish();
+
+        ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
+        byte[] buffer = new byte[1024];
+
+        while (!deflater.finished()) {
+            int compressedSize = deflater.deflate(buffer);
+            outputStream.write(buffer, 0, compressedSize);
+        }
+
+        return outputStream.toByteArray();
+    }
+
+    public static byte[] decompress(byte[] input) throws DataFormatException {
+        Inflater inflater = new Inflater();
+        inflater.setInput(input);
+
+        ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
+        byte[] buffer = new byte[1024];
+
+        while (!inflater.finished()) {
+            int decompressedSize = inflater.inflate(buffer);
+            outputStream.write(buffer, 0, decompressedSize);
+        }
+
+        return outputStream.toByteArray();
+    }
+
+    public static void main(String[] args) throws Exception {
+        String inputString = "Baeldung helps developers explore the Java ecosystem and simply be better engineers. " +
+                "We publish to-the-point guides and courses, with a strong focus on building web applications, Spring, " +
+                "Spring Security, and RESTful APIs";
+        byte[] input = inputString.getBytes();
+
+        // Compression
+        byte[] compressedData = compress(input);
+
+        // Decompression
+        byte[] decompressedData = decompress(compressedData);
+
+        System.out.println("Original: " + input.length + " bytes");
+        System.out.println("Compressed: " + compressedData.length + " bytes");
+        System.out.println("Decompressed: " + decompressedData.length + " bytes");
+    }
+
+}