java.io.FileFilter Java Examples

@Override
public List<File> findFiles(final File directoryToSearch, final List<String> filenamePatterns, final int depth, boolean findInsideMatchingDirectories) {
    List<File> found = new ArrayList<>();
    for (int i = 0; i <= depth; i++) {
        if (files.containsKey(i)) {
            List<File> possibles = files.get(i);
            for (String pattern : filenamePatterns) {
                FileFilter fileFilter = new WildcardFileFilter(pattern);
                for (File possible : possibles) {
                    if (fileFilter.accept(possible)) {
                        found.add(possible);
                    }
                }

            }
        }
    }
    return found;
}
 

/**
 * 获取CPU个数
 */
public static int getCoreNum() {
    class CpuFilter implements FileFilter {
        @Override
        public boolean accept(File pathname) {
            // Check if filename is "cpu", followed by a single digit number
            if (Pattern.matches("cpu[0-9]", pathname.getName())) {
                return true;
            }
            return false;
        }
    }

    try {
        // Get directory containing CPU info
        File dir = new File("/sys/devices/system/cpu/");
        // Filter to only list the devices we care about
        File[] files = dir.listFiles(new CpuFilter());
        // Return the number of cores (virtual CPU devices)
        return files.length;
    } catch (Exception e) {
        Log.e(TAG, "getCoreNum", e);
        // Default to return 1 core
        return 1;
    }
}
 

private void copyImagesAndCertificates(String origConfigFile, TestContext context) {
	File sourceDir = new File(origConfigFile).getParentFile();
	if(!sourceDir.exists()) {
		sourceDir = new File(ImportTestAction.class.getResource(origConfigFile).getFile()).getParentFile();
		if(!sourceDir.exists()) { 
			return;
		}
	}
	FileFilter filter = new WildcardFileFilter(new String[] {"*.crt", "*.jpg", "*.png", "*.pem"});
	try {
		LOG.info("Copy certificates and images from source: "+sourceDir+" into test-dir: '"+testDir+"'");
		FileUtils.copyDirectory(sourceDir, testDir, filter);
	} catch (IOException e) {

	}
}
 

/**
 * 删除目录下所有过滤的文件
 * @param dir    目录
 * @param filter 过滤器
 * @return {@code true} 删除成功, {@code false} 删除失败
 */
public static boolean deleteFilesInDirWithFilter(final File dir, final FileFilter filter) {
    if (filter == null) return false;
    // dir is null then return false
    if (dir == null) return false;
    // dir doesn't exist then return true
    if (!dir.exists()) return true;
    // dir isn't a directory then return false
    if (!dir.isDirectory()) return false;
    File[] files = dir.listFiles();
    if (files != null && files.length != 0) {
        for (File file : files) {
            if (filter.accept(file)) {
                if (file.isFile()) {
                    if (!file.delete()) return false;
                } else if (file.isDirectory()) {
                    if (!deleteDir(file)) return false;
                }
            }
        }
    }
    return true;
}
 

public BreadthFirstDirectoryVisitor(Iterable<File> startingDirectories,
        final FileFilter directoryFilter, FileFilter filter,
        boolean compareCase) {
    this.directoryFilter = directoryFilter == null ? DIRECTORIES
            : new FileFilter() {
                public boolean accept(File pathname) {
                    return pathname.isDirectory()
                            && directoryFilter.accept(pathname);
                }
            };
    this.filter = filter;
    comparator = compareCase ? CASE_SENSITIVE : CASE_INSENSITIVE;
    for (File directory : startingDirectories) {
        if (!directory.isDirectory()) {
            throw new RuntimeException(directory + " is not a directory");
        }
        directoryQueue.addLast(directory);
    }
}
 

/**
 * Finds files within a given directory (and optionally its
 * subdirectories). All files found are filtered by an IOFileFilter.
 *
 * @param files the collection of files found.
 * @param directory the directory to search in.
 * @param filter the filter to apply to files and directories.
 * @param includeSubDirectories indicates if will include the subdirectories themselves
 */
private static void innerListFiles(Collection<File> files, File directory,
        IOFileFilter filter, boolean includeSubDirectories) {
    File[] found = directory.listFiles((FileFilter) filter);
    
    if (found != null) {
        for (File file : found) {
            if (file.isDirectory()) {
                if (includeSubDirectories) {
                    files.add(file);
                }
                innerListFiles(files, file, filter, includeSubDirectories);
            } else {
                files.add(file);
            }
        }
    }
}
 

private boolean isProtosAvailable(String fileLocation) {
    File file = new File(fileLocation);
    if (!file.exists()) {
        return false;
    }
    FilenameFilter protoFilter = (f, name) -> (name.endsWith(".proto"));
    String[] fileNames = file.list(protoFilter);
    if (fileNames != null && fileNames.length > 0) {
        return true;
    }
    //allow the users to have proto definitions inside a directory if required
    FileFilter dirFilter = (f) -> f.isDirectory();
    File[] subDirectories = file.listFiles(dirFilter);
    for (File dir : subDirectories) {
        return isProtosAvailable(dir.getAbsolutePath());
    }
    return false;
}
 

private Map<File, List<File>> recoverIndexDirectories() {
    final Map<File, List<File>> indexDirectoryMap = new HashMap<>();

    for (final File storageDirectory : repoConfig.getStorageDirectories().values()) {
        final List<File> indexDirectories = new ArrayList<>();
        final File[] matching = storageDirectory.listFiles(new FileFilter() {
            @Override
            public boolean accept(final File pathname) {
                return pathname.isDirectory() && indexNamePattern.matcher(pathname.getName()).matches();
            }
        });

        if (matching != null) {
            for (final File matchingFile : matching) {
                indexDirectories.add(matchingFile);
            }
        }

        indexDirectoryMap.put(storageDirectory, indexDirectories);
    }

    return indexDirectoryMap;
}
 

public LoadLevelWindow(SideScroller a, GameplayScene scene) {

		super(a);
		collidableObjects = new ArrayList<CollidableObject>();
		backgroundObjects = new ArrayList<BackgroundObject>();
		picked = "";
		this.scene = scene;
		f = new File(path);
		f.mkdirs();
		File[] files = f.listFiles(new FileFilter() {
			@Override
			public boolean accept(File pathname) {
				String name = pathname.getName().toLowerCase();
				return name.endsWith(".dat") && pathname.isFile();
			}
		});

		list = new List(a, Arrays.stream(files).map(File::getName).toArray(String[]::new), 30);
		list.setSizeH(200);
		list.setPosition(applet.width / 2 + 400, 325);
		list.setConfirmButton("Confirm", applet.width / 2 + 400, 500);
		list.setCancelButton("Cancel", applet.width / 2 + 400, 550);
	}
 

/**
 * 获取目录下所有过滤的文件
 * @param dir         目录
 * @param filter      过滤器
 * @param isRecursive 是否递归进子目录
 * @return 文件链表
 */
public static List<FileList> listFilesInDirWithFilterBean(final File dir, final FileFilter filter, final boolean isRecursive) {
    if (!isDirectory(dir) || filter == null) return null;
    List<FileList> list = new ArrayList<>();
    File[] files = dir.listFiles();
    if (files != null && files.length != 0) {
        for (File file : files) {
            if (filter.accept(file)) {
                FileList fileList;
                if (isRecursive && file.isDirectory()) {
                    List<FileList> subs = listFilesInDirWithFilterBean(file, filter, true);
                    fileList = new FileList(file, subs);
                } else {
                    fileList = new FileList(file);
                }
                list.add(fileList);
            }
        }
    }
    return list;
}
 

/**
 * 删除遗留的低版本的apk
 */
private static void deleteOldApks(File rootDir, final String packageName) {
    List<File> apkFiles = new ArrayList<>();
    FileFilter fileFilter = new FileFilter() {
        @Override
        public boolean accept(File pathname) {
            String name = pathname.getName();
            return name.startsWith(packageName) && name.endsWith(APK_SUFFIX);
        }
    };
    File[] files = rootDir.listFiles(fileFilter);
    if (files != null) {
        for (File file : files) {
            apkFiles.add(file);
        }
    }
    // 删除相关apk文件
    for (File apkFile : apkFiles) {
        if (apkFile.delete()) {
            PluginDebugLog.installFormatLog(TAG, "deleteOldApks %s,  dex %s success!", packageName, apkFile.getAbsolutePath());
        } else {
            PluginDebugLog.installFormatLog(TAG, "deleteOldApks %s, dex %s fail!", packageName, apkFile.getAbsolutePath());
        }
    }
}
 

/**
 * <p>Determine whether a file is to be accepted or not, based on the
 * contained filters. The file is accepted if any one of the contained
 * filters accepts it. This method stops looping over the contained
 * filters as soon as it encounters one whose <tt>accept()</tt> method
 * returns <tt>false</tt> (implementing a "short-circuited AND"
 * operation.)</p>
 *
 * <p>If the set of contained filters is empty, then this method
 * returns <tt>true</tt>.</p>
 *
 * @param file  The file to check for acceptance
 *
 * @return <tt>true</tt> if the file matches, <tt>false</tt> if it doesn't
 */
public boolean accept (File file)
{
    boolean accepted = false;

    if (filters.size() == 0)
        accepted = true;

    else
    {
        for (FileFilter filter : filters)
        {
            accepted = filter.accept (file);
            if (accepted)
                break;
        }
    }

    return accepted;
}
 

/**
 * Gets the number of cores available in this device, across all processors.
 * Requires: Ability to peruse the filesystem at "/sys/devices/system/cpu"
 * @return The number of cores, or 1 if failed to get result
 */
private int getNumCoresOldPhones() {
    class CpuFilter implements FileFilter {
        @Override
        public boolean accept(File pathname) {
            return Pattern.matches("cpu[0-9]+", pathname.getName());
        }
    }
    try {
        File dir = new File("/sys/devices/system/cpu/");
        File[] files = dir.listFiles(new CpuFilter());
        return files.length;
    } catch(Exception e) {
        return 1;
    }
}
 

/**
 * Delete all files that satisfy the filter in directory.
 *
 * @param dir The directory.
 * @param filter The filter.
 * @return {@code true}: success<br>{@code false}: fail
 */
public static boolean deleteFilesInDirWithFilter(final File dir, final FileFilter filter) {
    if (dir == null) return false;
    // dir doesn't exist then return true
    if (!dir.exists()) return true;
    // dir isn't a directory then return false
    if (!dir.isDirectory()) return false;
    File[] files = dir.listFiles();
    if (files != null && files.length != 0) {
        for (File file : files) {
            if (filter.accept(file)) {
                if (file.isFile()) {
                    if (!file.delete()) return false;
                } else if (file.isDirectory()) {
                    if (!deleteDir(file)) return false;
                }
            }
        }
    }
    return true;
}
 

/**
 * Return the files that satisfy the filter in directory.
 *
 * @param dir The directory.
 * @param filter The filter.
 * @param isRecursive True to traverse subdirectories, false otherwise.
 * @return the files that satisfy the filter in directory
 */
public static List<File> listFilesInDirWithFilter(final File dir, final FileFilter filter,
                                                  final boolean isRecursive) {
    if (!isDir(dir)) return null;
    List<File> list = new ArrayList<>();
    File[] files = dir.listFiles();
    if (files != null && files.length != 0) {
        for (File file : files) {
            if (filter.accept(file)) {
                list.add(file);
            }
            if (isRecursive && file.isDirectory()) {
                //noinspection ConstantConditions
                list.addAll(listFilesInDirWithFilter(file, filter, true));
            }
        }
    }
    return list;
}
 

private Map<String, File[]> getCachedTableSnapshotsFolders(File dbBaseFolder) {
    Map<String, File[]> result = Maps.newHashMap();
    File[] tableFolders = dbBaseFolder.listFiles(new FileFilter() {
        @Override
        public boolean accept(File file) {
            return file.isDirectory();
        }
    });
    if (tableFolders == null) {
        return result;
    }

    for (File tableFolder : tableFolders) {
        String tableName = tableFolder.getName();
        File[] snapshotFolders = tableFolder.listFiles(new FileFilter() {
            @Override
            public boolean accept(File snapshotFile) {
                return snapshotFile.isDirectory();
            }
        });
        result.put(tableName, snapshotFolders);
    }
    return result;
}
 

/**
 * 查找该目录下的所有的jar文件
 *
 * @param jarPath
 * @throws Exception
 */
private String getJarFiles(String jarPath) throws Exception {
    File sourceFile = new File(jarPath);
    // String jars="";
    if (sourceFile.exists()) {// 文件或者目录必须存在
        if (sourceFile.isDirectory()) {// 若file对象为目录
            // 得到该目录下以.java结尾的文件或者目录
            File[] childrenFiles = sourceFile.listFiles(new FileFilter() {
                public boolean accept(File pathname) {
                    if (pathname.isDirectory()) {
                        return true;
                    } else {
                        String name = pathname.getName();
                        if (name.endsWith(".jar") ? true : false) {
                            jars = jars + pathname.getPath() + File.separatorChar;
                            return true;
                        }
                        return false;
                    }
                }
            });
        }
    }
    return jars;
}
 

/**
 * 递归遍历所有文件
 */
public static List<File> listAllFiles(File dir, FileFilter filter) {
    List<File> result = new ArrayList<>();
    LinkedList<File> dirs = new LinkedList<>();
    dirs.add( dir );
    while(!dirs.isEmpty()) {
        File file = dirs.poll();
        if ( file.isDirectory() ) {
            File[] files = file.listFiles();
            if (files!=null) {
                dirs.addAll(Arrays.asList(files));
            }
            continue;
        }
        if ( filter==null || filter.accept(file) ) {
            result.add(file);
        }
    }
    return result;
}
 

@NonNull
public static List<File> listFiles(@NonNull File directory, @Nullable FileFilter fileFilter) {
    List<File> fileList = new LinkedList<>();
    File[] found = directory.listFiles(fileFilter);
    if (found != null) {
        Collections.addAll(fileList, found);
    }
    return fileList;
}
 

static FileFilter createFilter(final String extension) {
    return new FileFilter() {
        @Override
        public boolean accept(File pathname) {
            String name = pathname.getName();
            if (name.endsWith(extension)) {
                return true;
            }
            return false;
        }
    };
}
 

/**
 * List the files contained in the directory given, that match the given regex
 */
public static File[] listFilesMatchingRegex(String baseDirectory, String regex) {
    return (new File(baseDirectory)).listFiles(new FileFilter() {
        @Override
        public boolean accept(File pathname) {
            return pathname.isFile() && pathname.getName().matches(regex);
        }
    });
}
 

/**
 * 删除目录下所有东西
 * @param dir 目录
 * @return {@code true} 删除成功, {@code false} 删除失败
 */
public static boolean deleteAllInDir(final File dir) {
    return deleteFilesInDirWithFilter(dir, new FileFilter() {
        @Override
        public boolean accept(File pathname) {
            return true;
        }
    });
}
 

/**
 * Return the files in directory.
 *
 * @param dir The directory.
 * @param isRecursive True to traverse subdirectories, false otherwise.
 * @return the files in directory
 */
public static List<File> listFilesInDir(final File dir, final boolean isRecursive) {
    return listFilesInDirWithFilter(dir, new FileFilter() {
        @Override
        public boolean accept(File pathname) {
            return true;
        }
    }, isRecursive);
}
 

public void openProjectAction(final IProject projectType) {
	String defaultLocation = TalosMain.Instance().ProjectController().getLastDir("Open", projectType);
	if(defaultLocation.equals("")) {
		TalosMain.Instance().ProjectController().getLastDir("Save", projectType);
	}
	fileChooser.setDirectory(defaultLocation);

	fileChooser.setMode(FileChooser.Mode.OPEN);
	fileChooser.setMultiSelectionEnabled(false);

	fileChooser.setFileFilter(new FileFilter() {
		@Override
		public boolean accept(File pathname) {
			return pathname.isDirectory() || pathname.getAbsolutePath().endsWith(projectType.getExtension());
		}
	});
	fileChooser.setSelectionMode(FileChooser.SelectionMode.FILES);

	fileChooser.setListener(new FileChooserAdapter() {
		@Override
		public void selected (Array<FileHandle> file) {
			String path = file.first().file().getAbsolutePath();
			TalosMain.Instance().ProjectController().setProject(projectType);
			TalosMain.Instance().ProjectController().loadProject(Gdx.files.absolute(path));
		}
	});

	stage.addActor(fileChooser.fadeIn());
}
 

public static void main(String[] args) {
	File[] files = new File("D:\\8000").listFiles();
	System.out.println(files.length);

	files = new File("D:\\8000").listFiles(new FileFilter() {
		@Override
		public boolean accept(File file) {
			return file.isHidden();
		}
	});
	System.out.println(files.length);

	files = new File("D:\\8000").listFiles(File::isHidden);
	System.out.println(files.length);
}
 

static FileFilter createFilter(final String extension) {
    return new FileFilter() {
        @Override
        public boolean accept(File pathname) {
            String name = pathname.getName();
            if (name.endsWith(extension)) {
                return true;
            }
            return false;
        }
    };
}
 

private static File[] filterClassFiles(String pkgPath) {
    if (pkgPath == null) {
        return null;
    }
    // 接收 .class 文件 或 类文件夹  
    return new File(pkgPath).listFiles(new FileFilter() {
        @Override
        public boolean accept(File file) {
            return (file.isFile() && file.getName().endsWith(".class")) || file.isDirectory();
        }
    });
}
 

public void saveAsProjectAction() {
	IProject projectType = TalosMain.Instance().ProjectController().getProject();
	String defaultLocation = TalosMain.Instance().ProjectController().getLastDir("Save", projectType);
	fileChooser.setDirectory(defaultLocation);

	final String ext = projectType.getExtension();
	fileChooser.setMode(FileChooser.Mode.SAVE);
	fileChooser.setMultiSelectionEnabled(false);
	fileChooser.setFileFilter(new FileFilter() {
		@Override
		public boolean accept(File pathname) {
			return pathname.isDirectory() || pathname.getAbsolutePath().endsWith(ext);
		}
	});
	fileChooser.setSelectionMode(FileChooser.SelectionMode.FILES);

	fileChooser.setListener(new FileChooserAdapter() {
		@Override
		public void selected(Array<FileHandle> file) {
			String path = file.first().file().getAbsolutePath();
			if(!path.endsWith(ext)) {
				if(path.indexOf(".") > 0) {
					path = path.substring(0, path.indexOf("."));
				}
				path += ext;
			}
			FileHandle handle = Gdx.files.absolute(path);
			TalosMain.Instance().ProjectController().saveProject(handle);
		}
	});

	fileChooser.setDefaultFileName(TalosMain.Instance().ProjectController().currentTab.fileName);

	stage.addActor(fileChooser.fadeIn());
}
 

/**
 * List the files contained in the directory given
 */
public static File[] listFiles(String baseDirectory) {
    return (new File(baseDirectory)).listFiles(new FileFilter() {
        @Override
        public boolean accept(File pathname) {
            return pathname.isFile();
        }
    });
}
 

/**
 * Get the list of xml files in the bookmark export folder.
 * @return The list of xml files in the bookmark export folder.
 */
public static List<String> getExportedBookmarksFileList() {
	List<String> result = new ArrayList<String>();
	
	File folder = getBookmarksExportFolder();		
	
	if (folder != null) {
		
		FileFilter filter = new FileFilter() {
			
			@Override
			public boolean accept(File pathname) {
                   return (pathname.isFile()) &&
                           (pathname.getPath().endsWith(".xml"));
               }
		};
		
		File[] files = folder.listFiles(filter);
		
		for (File file : files) {
			result.add(file.getName());
		}			
	}
	
	Collections.sort(result, new Comparator<String>() {

		@Override
		public int compare(String arg0, String arg1) {				
			return arg1.compareTo(arg0);
		}    		
   	});
	
	return result;
}