zip and unzip

core-java-8/src/main/java/com/baeldung/unzip/UnzipFile.java

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+package com.baeldung.unzip;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileNotFoundException;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.util.zip.ZipEntry;
+import java.util.zip.ZipInputStream;
+
+public class UnzipFile {
+    public static void main(String[] args) throws FileNotFoundException, IOException {
+        String fileZip = "/opt/zipped/cities.zip";
+        byte[] buffer = new byte[1024];
+        ZipInputStream zis = new ZipInputStream(new FileInputStream(fileZip));
+        ZipEntry zipEntry = zis.getNextEntry();
+        while(zipEntry != null){
+            String fileName = zipEntry.getName();
+            File newFile = new File("/opt/unzipped/" + fileName);
+            FileOutputStream fos = new FileOutputStream(newFile);             
+            int len;
+            while ((len = zis.read(buffer)) > 0) {
+                fos.write(buffer, 0, len);
+            }
+            fos.close();   
+            zipEntry = zis.getNextEntry();
+        }
+        zis.closeEntry();
+        zis.close();
+    }
+}

core-java-8/src/main/java/com/baeldung/zip/ZipFile.java

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+package com.baeldung.zip;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileNotFoundException;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.util.zip.ZipEntry;
+import java.util.zip.ZipOutputStream;
+
+public class ZipFile {
+    public static void main(String[] args) throws FileNotFoundException, IOException {
+        String sourceFile = "/opt/photos/photo.png";
+        FileOutputStream fos = new FileOutputStream("/opt/zipped/cities.zip");		
+        ZipOutputStream zipOut = new ZipOutputStream(fos);
+        File fileToZip = new File(sourceFile);
+        FileInputStream fis = new FileInputStream(fileToZip);
+        ZipEntry zipEntry = new ZipEntry(fileToZip.getName());
+        zipOut.putNextEntry(zipEntry);
+        byte[] bytes = new byte[1024];
+        int length;
+        while((length = fis.read(bytes)) >= 0) {
+            zipOut.write(bytes, 0, length);
+        }
+        zipOut.close();
+        fis.close();
+        fos.close();
+    }
+}