/*
 * JBoss, Home of Professional Open Source.
 * Copyright 2014 Red Hat, Inc., and individual contributors
 * as indicated by the @author tags.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */

package io.undertow.util;

import java.io.BufferedInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.nio.charset.StandardCharsets;
import java.nio.file.FileVisitResult;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.SimpleFileVisitor;
import java.nio.file.attribute.BasicFileAttributes;

Author:Stuart Douglas
/** * @author Stuart Douglas */
public class FileUtils { private FileUtils() { } public static String readFile(Class<?> testClass, String fileName) { final URL res = testClass.getResource(fileName); return readFile(res); } public static String readFile(URL url) { try { return readFile(url.openStream()); } catch (IOException e) { throw new RuntimeException(e); } }
Reads the file and converting it to using UTF-8 encoding.
/** * Reads the {@link InputStream file} and converting it to {@link String using UTF-8 encoding. */
public static String readFile(InputStream file) { try (BufferedInputStream stream = new BufferedInputStream(file)) { byte[] buff = new byte[1024]; StringBuilder builder = new StringBuilder(); int read; while ((read = stream.read(buff)) != -1) { builder.append(new String(buff, 0, read, StandardCharsets.UTF_8)); } return builder.toString(); } catch (IOException e) { throw new RuntimeException(e); } } public static void deleteRecursive(final Path directory) throws IOException { if(!Files.isDirectory(directory)) { return; } Files.walkFileTree(directory, new SimpleFileVisitor<Path>() { @Override public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) throws IOException { try { Files.delete(file); } catch (IOException e) { // ignored } return FileVisitResult.CONTINUE; } @Override public FileVisitResult postVisitDirectory(Path dir, IOException exc) throws IOException { try { Files.delete(dir); } catch (IOException e) { // ignored } return FileVisitResult.CONTINUE; } }); } }