java create zip file

1import java.io.FileOutputStream;
2import java.io.IOException;
3import java.nio.file.*;
4import java.nio.file.attribute.BasicFileAttributes;
5import java.util.zip.ZipEntry;
6import java.util.zip.ZipOutputStream;
7
8public class ZipCompress {
9    public static void compress(String dirPath) {
10        final Path sourceDir = Paths.get(dirPath);
11        String zipFileName = dirPath.concat(".zip");
12        try {
13            final ZipOutputStream outputStream = new ZipOutputStream(new FileOutputStream(zipFileName));
14            Files.walkFileTree(sourceDir, new SimpleFileVisitor<Path>() {
15                @Override
16                public FileVisitResult visitFile(Path file, BasicFileAttributes attributes) {
17                    try {
18                        Path targetFile = sourceDir.relativize(file);
19                        outputStream.putNextEntry(new ZipEntry(targetFile.toString()));
20                        byte[] bytes = Files.readAllBytes(file);
21                        outputStream.write(bytes, 0, bytes.length);
22                        outputStream.closeEntry();
23                    } catch (IOException e) {
24                        e.printStackTrace();
25                    }
26                    return FileVisitResult.CONTINUE;
27                }
28            });
29            outputStream.close();
30        } catch (IOException e) {
31            e.printStackTrace();
32        }
33    }
34}

1import java.io.BufferedOutputStream;
2import java.io.File;
3import java.io.FileOutputStream;
4import java.nio.file.Files;
5import java.nio.file.Paths;
6import java.util.ArrayList;
7import java.util.List;
8import java.util.zip.ZipEntry;
9import java.util.zip.ZipOutputStream;
10
11public class zip {
12
13    public static void main(String[] args) {
14    	zipFolder(mapFolder("Test"));
15    	
16        System.out.println("Done");
17    }
18    
19	public static List<String> mapFolder(String path, boolean includeEmptyFolders) {
20    	List<String> map = new ArrayList<String>();
21    	List<String> unmappedDirs = new ArrayList<String>();
22    	File[] items = new File(path).listFiles();
23
24    	if (!path.substring(path.length() - 1).equals("/")) {
25    		path += "/";
26    	}
27    		
28    	if (items != null) {
29	    	for (File item : items) {
30	    		if (item.isFile()) {
31	    				map.add(path+item.getName());
32	    		} else {
33	    			unmappedDirs.add(path+item.getName());
34	    		}
35	    	}
36	    	
37	    	if (!unmappedDirs.isEmpty()) {
38	    		for (String folder : unmappedDirs) {
39	    			List<String> temp = mapFolder(folder, includeEmptyFolders);
40	    			if (!temp.isEmpty()) {
41	    				for (String item : temp)
42	    					map.add(item);
43    				} else if (includeEmptyFolders == true) {
44    					map.add(folder+"/");
45    				}
46	    		}
47	    	}
48    	}
49    	return map;
50    }
51    
52    public static void zipFolder(String zipPath, List<String> items) {
53    	try {
54            FileOutputStream f = new FileOutputStream(zipPath);
55            ZipOutputStream zip = new ZipOutputStream(new BufferedOutputStream(f));
56            
57            for (String item : items) {
58            	String contents = String.join("\n", Files.readAllLines(Paths.get(item)));
59            	zip.putNextEntry(new ZipEntry(item));
60            	
61            	byte[] data = contents.getBytes();
62            	zip.write(data, 0, data.length);
63            	zip.closeEntry();
64            }
65		    	
66            zip.close();
67            f.close();
68        } catch(Exception e) {
69            System.out.println(e.getMessage());
70        }
71    }
72}