Working with Archive Files - Beginning Java 8 Language Features - page 367

import java.io.File;
import java.util.zip.Deflater;
public class ZipUtility {
public static void main(String[] args) {
// we want to create a ziptest.zip file in the current
// directory. We want to add two files to this zip file.
// Both file paths are relative to the current directory.
String zipFileName = "ziptest.zip";
String[] entries = new String[2];
entries[0] = "test1.txt";
entries[1] = "notes" + File.separator + "test2.txt";
zip(zipFileName, entries);
}
public static void zip(String zipFileName, String[] zipEntries) {
// Get the current directory for later use
String currentDirectory = System.getProperty("user.dir");
try (ZipOutputStream zos =
new ZipOutputStream(
new BufferedOutputStream(
new FileOutputStream(zipFileName)))) {
// Set the compression level to best compression
zos.setLevel(Deflater.BEST_COMPRESSION);
// Add each entry to the ZIP file
for (int i = 0; i < zipEntries.length; i++) {
// Make sure the entry file exists
File entryFile = new File(zipEntries[i]);
if (!entryFile.exists()) {
System.out.println("The entry file "
+ entryFile.getAbsolutePath()
+ " does not exist");
System.out.println(
"Aborted processing.");
return;
}
// Create a ZipEntry object
ZipEntry ze = new ZipEntry(zipEntries[i]);
// Add zip entry object to the ZIP file
zos.putNextEntry(ze);
// Add the contents of the entry to the ZIP file
addEntryContent(zos, zipEntries[i]);
// We are done with the current entry
zos.closeEntry();
}