Java example source code file (Demo.java)
The Demo.java Java example source code
/*
* Copyright (c) 2010 Oracle and/or its affiliates. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of Oracle nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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/*
* This source code is provided to illustrate the usage of a given feature
* or technique and has been deliberately simplified. Additional steps
* required for a production-quality application, such as security checks,
* input validation and proper error handling, might not be present in
* this sample code.
*/
import java.io.*;
import java.nio.*;
import java.nio.channels.*;
import java.nio.file.*;
import java.nio.file.spi.*;
import java.nio.file.attribute.*;
import java.net.*;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.*;
import static java.nio.file.StandardOpenOption.*;
import static java.nio.file.StandardCopyOption.*;
/*
* ZipFileSystem usage demo
*
* java Demo action ZipfileName [...]
*
* @author Xueming Shen
*/
public class Demo {
static enum Action {
rename, // <java Demo rename zipfile src dst>
// rename entry src to dst inside zipfile
movein, // <java Demo movein zipfile src dst>
// move an external src file into zipfile
// as entry dst
moveout, // <java Demo moveout zipfile src dst>
// move a zipfile entry src out to dst
copy, // <java Demo copy zipfile src dst>
// copy entry src to dst inside zipfile
copyin, // <java Demo copyin zipfile src dst>
// copy an external src file into zipfile
// as entry dst
copyin_attrs, // <java Demo copyin_attrs zipfile src dst>
// copy an external src file into zipfile
// as entry dst, with attributes (timestamp)
copyout, // <java Demo copyout zipfile src dst>
// copy zipfile entry src" out to file dst
copyout_attrs, // <java Demo copyout_attrs zipfile src dst>
zzmove, // <java Demo zzmove zfsrc zfdst path>
// move entry path/dir from zfsrc to zfdst
zzcopy, // <java Demo zzcopy zfsrc zfdst path>
// copy path from zipfile zfsrc to zipfile
// zfdst
attrs, // <java Demo attrs zipfile path>
// printout the attributes of entry path
attrsspace, // <java Demo attrsspace zipfile path>
// printout the storespace attrs of entry path
setmtime, // <java Demo setmtime zipfile "MM/dd/yy-HH:mm:ss" path...>
// set the lastModifiedTime of entry path
setatime, // <java Demo setatime zipfile "MM/dd/yy-HH:mm:ss" path...>
setctime, // <java Demo setctime zipfile "MM/dd/yy-HH:mm:ss" path...>
lsdir, // <java Demo lsdir zipfile dir>
// list dir's direct child files/dirs
mkdir, // <java Demo mkdir zipfile dir>
mkdirs, // <java Demo mkdirs zipfile dir>
rmdirs, // <java Demo rmdirs zipfile dir>
list, // <java Demo list zipfile [dir]>
// recursively list all entries of dir
// via DirectoryStream
tlist, // <java Demo tlist zipfile [dir]>
// list with buildDirTree=true
vlist, // <java Demo vlist zipfile [dir]>
// recursively verbose list all entries of
// dir via DirectoryStream
walk, // <java Demo walk zipfile [dir]>
// recursively walk all entries of dir
// via Files.walkFileTree
twalk, // <java Demo twalk zipfile [dir]>
// walk with buildDirTree=true
extract, // <java Demo extract zipfile file [...]>
update, // <java Demo extract zipfile file [...]>
delete, // <java Demo delete zipfile file [...]>
add, // <java Demo add zipfile file [...]>
create, // <java Demo create zipfile file [...]>
// create a new zipfile if it doesn't exit
// and then add the file(s) into it.
attrs2, // <java Demo attrs2 zipfile file [...]>
// test different ways to print attrs
prof,
}
public static void main(String[] args) throws Throwable {
FileSystemProvider provider = getZipFSProvider();
if (provider == null) {
System.err.println("ZIP filesystem provider is not installed");
System.exit(1);
}
Action action = Action.valueOf(args[0]);
Map<String, Object> env = env = new HashMap<>();
if (action == Action.create)
env.put("create", "true");
try (FileSystem fs = provider.newFileSystem(Paths.get(args[1]), env)) {
Path path, src, dst;
switch (action) {
case rename:
src = fs.getPath(args[2]);
dst = fs.getPath(args[3]);
Files.move(src, dst);
break;
case moveout:
src = fs.getPath(args[2]);
dst = Paths.get(args[3]);
Files.move(src, dst);
break;
case movein:
src = Paths.get(args[2]);
dst = fs.getPath(args[3]);
Files.move(src, dst);
break;
case copy:
src = fs.getPath(args[2]);
dst = fs.getPath(args[3]);
Files.copy(src, dst);
break;
case copyout:
src = fs.getPath(args[2]);
dst = Paths.get(args[3]);
Files.copy(src, dst);
break;
case copyin:
src = Paths.get(args[2]);
dst = fs.getPath(args[3]);
Files.copy(src, dst);
break;
case copyin_attrs:
src = Paths.get(args[2]);
dst = fs.getPath(args[3]);
Files.copy(src, dst, COPY_ATTRIBUTES);
break;
case copyout_attrs:
src = fs.getPath(args[2]);
dst = Paths.get(args[3]);
Files.copy(src, dst, COPY_ATTRIBUTES);
break;
case zzmove:
try (FileSystem fs2 = provider.newFileSystem(Paths.get(args[2]), env)) {
z2zmove(fs, fs2, args[3]);
}
break;
case zzcopy:
try (FileSystem fs2 = provider.newFileSystem(Paths.get(args[2]), env)) {
z2zcopy(fs, fs2, args[3]);
}
break;
case attrs:
for (int i = 2; i < args.length; i++) {
path = fs.getPath(args[i]);
System.out.println(path);
System.out.println(
Files.readAttributes(path, BasicFileAttributes.class).toString());
}
break;
case setmtime:
DateFormat df = new SimpleDateFormat("MM/dd/yyyy-HH:mm:ss");
Date newDatetime = df.parse(args[2]);
for (int i = 3; i < args.length; i++) {
path = fs.getPath(args[i]);
Files.setAttribute(path, "lastModifiedTime",
FileTime.fromMillis(newDatetime.getTime()));
System.out.println(
Files.readAttributes(path, BasicFileAttributes.class).toString());
}
break;
case setctime:
df = new SimpleDateFormat("MM/dd/yyyy-HH:mm:ss");
newDatetime = df.parse(args[2]);
for (int i = 3; i < args.length; i++) {
path = fs.getPath(args[i]);
Files.setAttribute(path, "creationTime",
FileTime.fromMillis(newDatetime.getTime()));
System.out.println(
Files.readAttributes(path, BasicFileAttributes.class).toString());
}
break;
case setatime:
df = new SimpleDateFormat("MM/dd/yyyy-HH:mm:ss");
newDatetime = df.parse(args[2]);
for (int i = 3; i < args.length; i++) {
path = fs.getPath(args[i]);
Files.setAttribute(path, "lastAccessTime",
FileTime.fromMillis(newDatetime.getTime()));
System.out.println(
Files.readAttributes(path, BasicFileAttributes.class).toString());
}
break;
case attrsspace:
path = fs.getPath("/");
FileStore fstore = Files.getFileStore(path);
System.out.printf("filestore[%s]%n", fstore.name());
System.out.printf(" totalSpace: %d%n",
(Long)fstore.getAttribute("totalSpace"));
System.out.printf(" usableSpace: %d%n",
(Long)fstore.getAttribute("usableSpace"));
System.out.printf(" unallocSpace: %d%n",
(Long)fstore.getAttribute("unallocatedSpace"));
break;
case list:
case tlist:
if (args.length < 3)
list(fs.getPath("/"), false);
else
list(fs.getPath(args[2]), false);
break;
case vlist:
if (args.length < 3)
list(fs.getPath("/"), true);
else
list(fs.getPath(args[2]), true);
break;
case twalk:
case walk:
walk(fs.getPath((args.length > 2)? args[2] : "/"));
break;
case extract:
if (args.length == 2) {
extract(fs, "/");
} else {
for (int i = 2; i < args.length; i++) {
extract(fs, args[i]);
}
}
break;
case delete:
for (int i = 2; i < args.length; i++)
Files.delete(fs.getPath(args[i]));
break;
case create:
case add:
case update:
for (int i = 2; i < args.length; i++) {
update(fs, args[i]);
}
break;
case lsdir:
path = fs.getPath(args[2]);
final String fStr = (args.length > 3)?args[3]:"";
try (DirectoryStream<Path> ds = Files.newDirectoryStream(path,
new DirectoryStream.Filter<Path>() {
@Override
public boolean accept(Path path) {
return path.toString().contains(fStr);
}
}))
{
for (Path p : ds)
System.out.println(p);
}
break;
case mkdir:
Files.createDirectory(fs.getPath(args[2]));
break;
case mkdirs:
mkdirs(fs.getPath(args[2]));
break;
case attrs2:
for (int i = 2; i < args.length; i++) {
path = fs.getPath(args[i]);
System.out.printf("%n%s%n", path);
System.out.println("-------(1)---------");
System.out.println(
Files.readAttributes(path, BasicFileAttributes.class).toString());
System.out.println("-------(2)---------");
Map<String, Object> map = Files.readAttributes(path, "zip:*");
for (Map.Entry<String, Object> e : map.entrySet()) {
System.out.printf(" %s : %s%n", e.getKey(), e.getValue());
}
System.out.println("-------(3)---------");
map = Files.readAttributes(path, "size,lastModifiedTime,isDirectory");
for (Map.Entry<String, ?> e : map.entrySet()) {
System.out.printf(" %s : %s%n", e.getKey(), e.getValue());
}
}
break;
case prof:
list(fs.getPath("/"), false);
while (true) {
Thread.sleep(10000);
//list(fs.getPath("/"), true);
System.out.println("sleeping...");
}
}
} catch (Exception x) {
x.printStackTrace();
}
}
private static FileSystemProvider getZipFSProvider() {
for (FileSystemProvider provider : FileSystemProvider.installedProviders()) {
if ("jar".equals(provider.getScheme()))
return provider;
}
return null;
}
@SuppressWarnings("unused")
/**
* Not used in demo, but included for demonstrational purposes.
*/
private static byte[] getBytes(String name) {
return name.getBytes();
}
@SuppressWarnings("unused")
/**
* Not used in demo, but included for demonstrational purposes.
*/
private static String getString(byte[] name) {
return new String(name);
}
private static void walk(Path path) throws IOException
{
Files.walkFileTree(
path,
new SimpleFileVisitor<Path>() {
private int indent = 0;
private void indent() {
int n = 0;
while (n++ < indent)
System.out.printf(" ");
}
@Override
public FileVisitResult visitFile(Path file,
BasicFileAttributes attrs)
{
indent();
System.out.printf("%s%n", file.getFileName().toString());
return FileVisitResult.CONTINUE;
}
@Override
public FileVisitResult preVisitDirectory(Path dir,
BasicFileAttributes attrs)
{
indent();
System.out.printf("[%s]%n", dir.toString());
indent += 2;
return FileVisitResult.CONTINUE;
}
@Override
public FileVisitResult postVisitDirectory(Path dir,
IOException ioe)
{
indent -= 2;
return FileVisitResult.CONTINUE;
}
});
}
private static void update(FileSystem fs, String path) throws Throwable{
Path src = FileSystems.getDefault().getPath(path);
if (Files.isDirectory(src)) {
try (DirectoryStream<Path> ds = Files.newDirectoryStream(src)) {
for (Path child : ds)
update(fs, child.toString());
}
} else {
Path dst = fs.getPath(path);
Path parent = dst.getParent();
if (parent != null && Files.notExists(parent))
mkdirs(parent);
Files.copy(src, dst, REPLACE_EXISTING);
}
}
private static void extract(FileSystem fs, String path) throws Throwable{
Path src = fs.getPath(path);
if (Files.isDirectory(src)) {
try (DirectoryStream<Path> ds = Files.newDirectoryStream(src)) {
for (Path child : ds)
extract(fs, child.toString());
}
} else {
if (path.startsWith("/"))
path = path.substring(1);
Path dst = FileSystems.getDefault().getPath(path);
Path parent = dst.getParent();
if (Files.notExists(parent))
mkdirs(parent);
Files.copy(src, dst, REPLACE_EXISTING);
}
}
// use DirectoryStream
private static void z2zcopy(FileSystem src, FileSystem dst, String path)
throws IOException
{
Path srcPath = src.getPath(path);
Path dstPath = dst.getPath(path);
if (Files.isDirectory(srcPath)) {
if (!Files.exists(dstPath)) {
try {
mkdirs(dstPath);
} catch (FileAlreadyExistsException x) {}
}
try (DirectoryStream<Path> ds = Files.newDirectoryStream(srcPath)) {
for (Path child : ds) {
z2zcopy(src, dst,
path + (path.endsWith("/")?"":"/") + child.getFileName());
}
}
} else {
//System.out.println("copying..." + path);
Files.copy(srcPath, dstPath);
}
}
// use TreeWalk to move
private static void z2zmove(FileSystem src, FileSystem dst, String path)
throws IOException
{
final Path srcPath = src.getPath(path).toAbsolutePath();
final Path dstPath = dst.getPath(path).toAbsolutePath();
Files.walkFileTree(srcPath, new SimpleFileVisitor<Path>() {
@Override
public FileVisitResult visitFile(Path file,
BasicFileAttributes attrs)
{
Path dst = srcPath.relativize(file);
dst = dstPath.resolve(dst);
try {
Path parent = dstPath.getParent();
if (parent != null && Files.notExists(parent))
mkdirs(parent);
Files.move(file, dst);
} catch (IOException x) {
x.printStackTrace();
}
return FileVisitResult.CONTINUE;
}
@Override
public FileVisitResult preVisitDirectory(Path dir,
BasicFileAttributes attrs)
{
Path dst = srcPath.relativize(dir);
dst = dstPath.resolve(dst);
try {
if (Files.notExists(dst))
mkdirs(dst);
} catch (IOException x) {
x.printStackTrace();
}
return FileVisitResult.CONTINUE;
}
@Override
public FileVisitResult postVisitDirectory(Path dir,
IOException ioe)
throws IOException
{
try {
Files.delete(dir);
} catch (IOException x) {
//x.printStackTrace();
}
return FileVisitResult.CONTINUE;
}
});
}
private static void mkdirs(Path path) throws IOException {
path = path.toAbsolutePath();
Path parent = path.getParent();
if (parent != null) {
if (Files.notExists(parent))
mkdirs(parent);
}
Files.createDirectory(path);
}
@SuppressWarnings("unused")
/**
* Not used in demo, but included for demonstrational purposes.
*/
private static void rmdirs(Path path) throws IOException {
while (path != null && path.getNameCount() != 0) {
Files.delete(path);
path = path.getParent();
}
}
private static void list(Path path, boolean verbose ) throws IOException {
if (!"/".equals(path.toString())) {
System.out.printf(" %s%n", path.toString());
if (verbose)
System.out.println(Files.readAttributes(path, BasicFileAttributes.class).toString());
}
if (Files.notExists(path))
return;
if (Files.isDirectory(path)) {
try (DirectoryStream<Path> ds = Files.newDirectoryStream(path)) {
for (Path child : ds)
list(child, verbose);
}
}
}
@SuppressWarnings("unused")
/**
* Checks that the content of two paths are equal.
* Not used in demo, but included for demonstrational purposes.
*/
private static void checkEqual(Path src, Path dst) throws IOException
{
//System.out.printf("checking <%s> vs <%s>...%n",
// src.toString(), dst.toString());
//streams
byte[] bufSrc = new byte[8192];
byte[] bufDst = new byte[8192];
try (InputStream isSrc = Files.newInputStream(src);
InputStream isDst = Files.newInputStream(dst))
{
int nSrc = 0;
while ((nSrc = isSrc.read(bufSrc)) != -1) {
int nDst = 0;
while (nDst < nSrc) {
int n = isDst.read(bufDst, nDst, nSrc - nDst);
if (n == -1) {
System.out.printf("checking <%s> vs <%s>...%n",
src.toString(), dst.toString());
throw new RuntimeException("CHECK FAILED!");
}
nDst += n;
}
while (--nSrc >= 0) {
if (bufSrc[nSrc] != bufDst[nSrc]) {
System.out.printf("checking <%s> vs <%s>...%n",
src.toString(), dst.toString());
throw new RuntimeException("CHECK FAILED!");
}
nSrc--;
}
}
}
// channels
try (SeekableByteChannel chSrc = Files.newByteChannel(src);
SeekableByteChannel chDst = Files.newByteChannel(dst))
{
if (chSrc.size() != chDst.size()) {
System.out.printf("src[%s].size=%d, dst[%s].size=%d%n",
chSrc.toString(), chSrc.size(),
chDst.toString(), chDst.size());
throw new RuntimeException("CHECK FAILED!");
}
ByteBuffer bbSrc = ByteBuffer.allocate(8192);
ByteBuffer bbDst = ByteBuffer.allocate(8192);
int nSrc = 0;
while ((nSrc = chSrc.read(bbSrc)) != -1) {
int nDst = chDst.read(bbDst);
if (nSrc != nDst) {
System.out.printf("checking <%s> vs <%s>...%n",
src.toString(), dst.toString());
throw new RuntimeException("CHECK FAILED!");
}
while (--nSrc >= 0) {
if (bbSrc.get(nSrc) != bbDst.get(nSrc)) {
System.out.printf("checking <%s> vs <%s>...%n",
src.toString(), dst.toString());
throw new RuntimeException("CHECK FAILED!");
}
nSrc--;
}
bbSrc.flip();
bbDst.flip();
}
} catch (IOException x) {
x.printStackTrace();
}
}
private static void fchCopy(Path src, Path dst) throws IOException
{
Set<OpenOption> read = new HashSet<>();
read.add(READ);
Set<OpenOption> openwrite = new HashSet<>();
openwrite.add(CREATE_NEW);
openwrite.add(WRITE);
try (FileChannel srcFc = src.getFileSystem().provider().newFileChannel(src, read);
FileChannel dstFc = dst.getFileSystem().provider().newFileChannel(dst, openwrite))
{
ByteBuffer bb = ByteBuffer.allocate(8192);
while (srcFc.read(bb) >= 0) {
bb.flip();
dstFc.write(bb);
bb.clear();
}
}
}
private static void chCopy(Path src, Path dst) throws IOException
{
Set<OpenOption> read = new HashSet<>();
read.add(READ);
Set<OpenOption> openwrite = new HashSet<>();
openwrite.add(CREATE_NEW);
openwrite.add(WRITE);
try (SeekableByteChannel srcCh = Files.newByteChannel(src, read);
SeekableByteChannel dstCh = Files.newByteChannel(dst, openwrite))
{
ByteBuffer bb = ByteBuffer.allocate(8192);
while (srcCh.read(bb) >= 0) {
bb.flip();
dstCh.write(bb);
bb.clear();
}
}
}
private static void streamCopy(Path src, Path dst) throws IOException
{
byte[] buf = new byte[8192];
try (InputStream isSrc = Files.newInputStream(src);
OutputStream osDst = Files.newOutputStream(dst))
{
int n = 0;
while ((n = isSrc.read(buf)) != -1) {
osDst.write(buf, 0, n);
}
}
}
}
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