CreateZIP.java

import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;

public class CreateZip {

	static byte[] buf = new byte[1024];

	/**
	 * Create ZIP
	 * 
	 * @param inputPath
	 *            ZIP compression target path
	 * @param outputZip
	 *            Create ZIP File path
	 * @throws IOException
	 */
	public static void createZip(String inputPath, String outputZip) throws IOException {
		// Specify the compression target with a relative path
		File[] inputFiles = { new File(inputPath) };

		// Create ZIP File name
		File outputFile = new File(outputZip);

		// Output stream filter for writing files in the ZIP file format.
		ZipOutputStream zos = new ZipOutputStream(new FileOutputStream(outputFile));

		// Compression target root path
		Path root = Paths.get(inputFiles[0].getParent());

		try {
			// ZIP compression
			encode(inputFiles, zos, root);
		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			zos.close();
		}
	}

	/**
	 * @param inputFiles
	 *            ZIP target files
	 * @param zos
	 *            Output stream (ZIP)
	 * @param root
	 *            Compression target root path
	 * @throws Exception
	 */
	static void encode(File[] inputFiles, ZipOutputStream zos, Path root) throws Exception {
		for (File f : inputFiles) {
			if (f.isDirectory()) {
				// To recursively processing
				encode(f.listFiles(), zos, root);
			} else {
				Path p = Paths.get(f.getAbsolutePath());

				// In the case of Windows, to replace
				ZipEntry entry = new ZipEntry(
						(p.subpath(root.getNameCount(), p.getNameCount())).toString().replace('\\', '/'));

				zos.putNextEntry(entry);
				try (InputStream is = new BufferedInputStream(new FileInputStream(f))) {
					for (;;) {
						int len = is.read(buf);
						if (len < 0)
							break;
						zos.write(buf, 0, len);
					}
				}
			}
		}
	}
}