Zip and UnZip files using Groovy

ZipUnzip.groovy

import java.util.zip.*
  
String zipFileName = "file.zip"  
String inputDir = "logs"
def outputDir = "zip"

//Zip files
  
ZipOutputStream zipFile = new ZipOutputStream(new FileOutputStream(zipFileName))  
new File(inputDir).eachFile() { file -> 
  //check if file
  if (file.isFile()){
    zipFile.putNextEntry(new ZipEntry(file.name))
    def buffer = new byte[file.size()]  
    file.withInputStream { 
      zipFile.write(buffer, 0, it.read(buffer))  
    }  
    zipFile.closeEntry()
  }
}  
zipFile.close()  


//UnZip archive

byte[] buffer = new byte[1024]
ZipInputStream zis = new ZipInputStream(new FileInputStream(zipFileName))
ZipEntry zipEntry = zis.getNextEntry()
while (zipEntry != null) {
     File newFile = new File(outputDir+ File.separator, zipEntry.name)
     if (zipEntry.isDirectory()) {
         if (!newFile.isDirectory() && !newFile.mkdirs()) {
             throw new IOException("Failed to create directory " + newFile)
         }
     } else {
         // fix for Windows-created archives
         File parent = newFile.parentFile
         if (!parent.isDirectory() && !parent.mkdirs()) {
             throw new IOException("Failed to create directory " + parent)
         }
         // write file content
         FileOutputStream fos = new FileOutputStream(newFile)
         int len = 0
         while ((len = zis.read(buffer)) > 0) {
             fos.write(buffer, 0, len)
         }
         fos.close()
     }
 zipEntry = zis.getNextEntry()
 }
zis.closeEntry()
zis.close()

The unzip process is broken, it gives only part of the file bytes, to fix this issue I used a java.nio.file.*

It should be now fixed, the standard java.util.zip can handle it, no need to use java.nio.file.*, credits to @Baeldung.