java 设置文件的属性_设置文件时间 文件属性 -Java实例教程集册 - 时代Java，与您同行！...

/*-

* Copyright (C) 2014 Erik Larsson

*

* This program is free software: you can redistribute it and/or modify

* it under the terms of the GNU General Public License as published by

* the Free Software Foundation, either version 3 of the License, or

* (at your option) any later version.

*

* This program is distributed in the hope that it will be useful,

* but WITHOUT ANY WARRANTY; without even the implied warranty of

* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

* GNU General Public License for more details.

*

* You should have received a copy of the GNU General Public License

* along with this program. If not, see .

*//* 来 自 n o w j a v a . c o m - 时 代 Java*/

//package com.nowjava;

import java.lang.reflect.Array;

import java.lang.reflect.Field;

import java.lang.reflect.InvocationTargetException;

import java.lang.reflect.Method;

import java.util.Date;

public class Main {

public static void setFileTimes(String path, Date creationTime,

Date lastAccessTime, Date lastModifiedTime)

throws ClassNotFoundException, NoSuchMethodException,

IllegalAccessException, IllegalArgumentException,

InvocationTargetException, NoSuchFieldException {

Class> pathClass = Class.forName("java.nio.file.Path");

Class> fileSystemsClass = Class

.forName("java.nio.file.FileSystems");/*nowjava - 时 代 Java 提 供*/

Class> fileSystemClass = Class

.forName("java.nio.file.FileSystem");

Class> basicFileAttributeViewClass = Class

.forName("java.nio.file.attribute.BasicFileAttributeView");

Class> filesClass = Class.forName("java.nio.file.Files");

Class> linkOptionClass = Class

.forName("java.nio.file.LinkOption");

Class> fileTimeClass = Class

.forName("java.nio.file.attribute.FileTime");

/* FileSystem defaultFileSystem = FileSystems.getDefault(); */

Method fileSystemsGetDefaultMethod = fileSystemsClass

.getMethod("getDefault");

Object defaultFileSystemObject = fileSystemsGetDefaultMethod

.invoke(null);

/* Path p = defaultFileSystem.getPath(path); */

Method fileSystemGetPathMethod = fileSystemClass.getMethod(

"getPath", String.class, String[].class);

Object pObject = fileSystemGetPathMethod.invoke(

defaultFileSystemObject, path, new String[0]);

/* BasicFileAttributeView attrView =

* Files.getFileAttributeView(p, BasicFileAttributeView.class,

* LinkOption.NOFOLLOW_LINKS); */

Field noFollowLinksField = linkOptionClass

.getField("NOFOLLOW_LINKS");

Object noFollowLinksObject = noFollowLinksField.get(null);

Object linkOptionsArray = Array.newInstance(linkOptionClass, 1);

Array.set(linkOptionsArray, 0, noFollowLinksObject);

Method getFileAttributeViewMethod = filesClass.getMethod(

"getFileAttributeView", pathClass, Class.class,

linkOptionsArray.getClass());

Object attrViewObject = getFileAttributeViewMethod.invoke(null,

pObject, basicFileAttributeViewClass, linkOptionsArray);

/*

* FileTime creationFileTime;

* if(creationTime != null) {

* creationFileTime = FileTime.fromMillis(creationTime.getTime());

* }

* else {

* creationFileTime = null;

* }

*/

Object creationFileTimeObject;

if (creationTime != null) {

Method fileTimefromMillisMethod = fileTimeClass.getMethod(

"fromMillis", long.class);

creationFileTimeObject = fileTimefromMillisMethod.invoke(null,

Long.valueOf(creationTime.getTime()));

} else {

creationFileTimeObject = null;

}

/*

* FileTime lastAccessFileTime;

* if(lastAccessTime != null) {

* lastAccessFileTime =

* FileTime.fromMillis(lastAccessTime.getTime());

* }

* else {

* lastAccessFileTime = null;

* }

*/

Object lastAccessFileTimeObject;

if (lastAccessTime != null) {

Method fileTimefromMillisMethod = fileTimeClass.getMethod(

"fromMillis", long.class);

lastAccessFileTimeObject = fileTimefromMillisMethod.invoke(

null, Long.valueOf(lastAccessTime.getTime()));

} else {

lastAccessFileTimeObject = null;

}

/*

* FileTime lastModifiedFileTime;

* if(lastModifiedTime != null) {

* lastModifiedFileTime =

* FileTime.fromMillis(lastModifiedTime.getTime());

* }

* else {

* lastModifiedFileTime = null;

* }

*/

Object lastModifiedFileTimeObject;

if (lastModifiedTime != null) {

Method fileTimefromMillisMethod = fileTimeClass.getMethod(

"fromMillis", long.class);

lastModifiedFileTimeObject = fileTimefromMillisMethod.invoke(

null, Long.valueOf(lastModifiedTime.getTime()));

} else {

lastModifiedFileTimeObject = null;

}

/* attrView.setTimes(lastModifiedFileTime, lastAccessFileTime,

* creationFileTime); */

Method basicFileAttributeViewSetTimesMethod = basicFileAttributeViewClass

.getMethod("setTimes", fileTimeClass, fileTimeClass,

fileTimeClass);

try {

basicFileAttributeViewSetTimesMethod.invoke(attrViewObject,

lastModifiedFileTimeObject, lastAccessFileTimeObject,

creationFileTimeObject);

} catch (InvocationTargetException ex) {

final Throwable cause = ex.getCause();

if (cause instanceof ClassNotFoundException) {

throw (ClassNotFoundException) cause;

} else if (cause