删除文件，永不引发异常。
/* * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. * The ASF licenses this file to You 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 com.nowjava; /**来 自 n o w j a v a . c o m - 时代Java**/ import java.io.File; import java.io.FileNotFoundException; import java.io.IOException; public class Main { public static void main(String[] argv) throws Exception { File file = new File("Main.java"); System.out.println(deleteQuietly(file));/** 来 自 N o w J a v a . c o m**/ } /** * Deletes a file, never throwing an exception. If file is a directory, delete it and all sub-directories. * <p> * The difference between File.delete() and this method are: * <ul> * <li>A directory to be deleted does not have to be empty.</li> * <li>No exceptions are thrown when a file or directory cannot be deleted.</li> * </ul> * * @param file file or directory to delete, can be <code>null</code> * @return <code>true</code> if the file or directory was deleted, otherwise * <code>false</code> * * @since Commons IO 1.4 */ public static boolean deleteQuietly(File file) { if (file == null) { return false; } try { if (file.isDirectory()) { cleanDirectory(file); } } catch (Exception ignored) { } try { return file.delete(); } catch (Exception ignored) { return false; } } /** * Cleans a directory without deleting it. * * @param directory directory to clean * @throws IOException in case cleaning is unsuccessful */ private static void cleanDirectory(File directory) throws IOException { if (!directory.exists()) { String message = directory + " does not exist"; throw new IllegalArgumentException(message); } if (!directory.isDirectory()) { String message = directory + " is not a directory"; throw new IllegalArgumentException(message); } File[] files = directory.listFiles(); if (files == null) { // null if security restricted throw new IOException("Failed to list contents of " + directory); } IOException exception = null; for (File file : files) { try { forceDelete(file); } catch (IOException ioe) { exception = ioe; } } if (null != exception) { throw exception; } } /** * Deletes a file. If file is a directory, delete it and all sub-directories. * <p> * The difference between File.delete() and this method are: * <ul> * <li>A directory to be deleted does not have to be empty.</li> * <li>You get exceptions when a file or directory cannot be deleted. * (java.io.File methods returns a boolean)</li> * </ul> * * @param file file or directory to delete, must not be <code>null</code> * @throws NullPointerException if the directory is <code>null</code> * @throws FileNotFoundException if the file was not found * @throws IOException in case deletion is unsuccessful */ public static void forceDelete(File file) throws IOException { if (file.isDirectory()) { deleteDirectory(file); } else { boolean filePresent = file.exists(); if (!file.delete()) { if (!filePresent) { throw new FileNotFoundException("File does not exist: " + fil