Commons_IO_FileUtils的使用

commos_io.jar包下载地址：http://commons.apache.org/proper/commons-io/download_io.cgi

官方文档地址：http://commons.apache.org/proper/commons-io/javadocs/api-release/index.html

//文件、目录遍历 

1 package commosIO;

 import java.io.File;

 import java.util.Collection;

 import org.apache.commons.io.FileUtils;

 import org.apache.commons.io.filefilter.DirectoryFileFilter;

 import org.apache.commons.io.filefilter.EmptyFileFilter;

 import org.apache.commons.io.filefilter.FileFilterUtils;

 import org.apache.commons.io.filefilter.SuffixFileFilter;

 public class CommosIOTest1 {

     public static void main(String[] args) {

         //文件或目录的大小

         long len = FileUtils.sizeOf(new File("src/commosIO/CommosIOTest1.java"));

         long len2 = FileUtils.sizeOf(new File("F:/EclipseWorkspace/Java300"));

         System.out.println(len);

         System.out.println(len2);

         System.out.println("-----------------------------");

         //列出目录下的文件  具体查看api文档

         Collection<File> c = FileUtils.listFiles(new File("F:/EclipseWorkspace/Java300"),

                 EmptyFileFilter.NOT_EMPTY,DirectoryFileFilter.INSTANCE);

         for(File temp:c) {

             System.out.println(temp.getAbsolutePath());

         }

         //只列出后缀为java的文件  文件过滤

         System.out.println("-----------------------------");

         Collection<File> c2 = FileUtils.listFiles(new File("F:/EclipseWorkspace/Java300"),

                 new SuffixFileFilter(".java"),DirectoryFileFilter.INSTANCE);

         for(File temp:c2) {

             System.out.println(temp.getAbsolutePath());

         }

         System.out.println("-----------------------------");

         Collection<File> c3 = FileUtils.listFiles(new File("F:/EclipseWorkspace/Java300"),

                 FileFilterUtils.or(new SuffixFileFilter(".java"),new SuffixFileFilter(".txt")),

                     DirectoryFileFilter.INSTANCE);

         for(File temp:c3) {

             System.out.println(temp.getAbsolutePath());

         }

     }

 }

输出：

1659

6089568

-----------------------------

F:\EclipseWorkspace\Java300\.classpath

F:\EclipseWorkspace\Java300\.project

F:\EclipseWorkspace\Java300\.settings\org.eclipse.jdt.core.prefs

F:\EclipseWorkspace\Java300\a-coyp.jpg

F:\EclipseWorkspace\Java300\a.jpg

F:\EclipseWorkspace\Java300\b.jpg

F:\EclipseWorkspace\Java300\bin\commosIO\CommosIOTest1.class

F:\EclipseWorkspace\Java300\bin\commosIO\CommosIOTest2.class

F:\EclipseWorkspace\Java300\bin\commosIO\CommosIOTest3.class

F:\EclipseWorkspace\Java300\bin\ioStudy\Coffee.class

F:\EclipseWorkspace\Java300\bin\ioStudy\Copy.class

F:\EclipseWorkspace\Java300\bin\ioStudy\Decorate.class

F:\EclipseWorkspace\Java300\bin\ioStudy\DecorateStudy1.class

F:\EclipseWorkspace\Java300\bin\ioStudy\DirStudy.class

F:\EclipseWorkspace\Java300\bin\ioStudy\Drink.class

F:\EclipseWorkspace\Java300\bin\ioStudy\IOstudy1.class

F:\EclipseWorkspace\Java300\bin\ioStudy\IOstudy2.class

F:\EclipseWorkspace\Java300\bin\ioStudy\IOstudy3.class

F:\EclipseWorkspace\Java300\bin\ioStudy\IOstudy4.class

F:\EclipseWorkspace\Java300\bin\ioStudy\IOstudy5.class

F:\EclipseWorkspace\Java300\bin\ioStudy\IOstudy6.class

F:\EclipseWorkspace\Java300\bin\ioStudy\IOstudy7.class

F:\EclipseWorkspace\Java300\bin\ioStudy\Milk.class

F:\EclipseWorkspace\Java300\bin\ioStudy\Sugar.class

F:\EclipseWorkspace\Java300\bin\test\stringTest\ArrayCopy1.class

F:\EclipseWorkspace\Java300\bin\test\stringTest\MyArrayList.class

F:\EclipseWorkspace\Java300\bin\test\stringTest\MyHashMap.class

F:\EclipseWorkspace\Java300\bin\test\stringTest\Node.class

F:\EclipseWorkspace\Java300\bin\test\stringTest\TestBubbleSort.class

F:\EclipseWorkspace\Java300\bin\test\stringTest\TestCollection.class

F:\EclipseWorkspace\Java300\bin\test\stringTest\TestString.class

F:\EclipseWorkspace\Java300\commons-io-2.6-sources.jar

F:\EclipseWorkspace\Java300\commons-io-2.6.jar

F:\EclipseWorkspace\Java300\order.txt

F:\EclipseWorkspace\Java300\output.txt

F:\EclipseWorkspace\Java300\src\commosIO\CommosIOTest1.java

F:\EclipseWorkspace\Java300\src\commosIO\CommosIOTest2.java

F:\EclipseWorkspace\Java300\src\commosIO\CommosIOTest3.java

F:\EclipseWorkspace\Java300\src\ioStudy\Copy.java

F:\EclipseWorkspace\Java300\src\ioStudy\DecorateStudy1.java

F:\EclipseWorkspace\Java300\src\ioStudy\DirStudy.java

F:\EclipseWorkspace\Java300\src\ioStudy\IOstudy1.java

F:\EclipseWorkspace\Java300\src\ioStudy\IOstudy2.java

F:\EclipseWorkspace\Java300\src\ioStudy\IOstudy3.java

F:\EclipseWorkspace\Java300\src\ioStudy\IOstudy4.java

F:\EclipseWorkspace\Java300\src\ioStudy\IOstudy5.java

F:\EclipseWorkspace\Java300\src\ioStudy\IOstudy6.java

F:\EclipseWorkspace\Java300\src\ioStudy\IOstudy7.java

F:\EclipseWorkspace\Java300\src\test\stringTest\ArrayCopy1.java

F:\EclipseWorkspace\Java300\src\test\stringTest\MyArrayList.java

F:\EclipseWorkspace\Java300\src\test\stringTest\MyHashMap.java

F:\EclipseWorkspace\Java300\src\test\stringTest\TestBubbleSort.java

F:\EclipseWorkspace\Java300\src\test\stringTest\TestCollection.java

F:\EclipseWorkspace\Java300\src\test\stringTest\TestString.java

F:\EclipseWorkspace\Java300\temp\a.jpg

F:\EclipseWorkspace\Java300\test.txt

F:\EclipseWorkspace\Java300\testcopy.txt

-----------------------------

F:\EclipseWorkspace\Java300\src\commosIO\CommosIOTest1.java

F:\EclipseWorkspace\Java300\src\commosIO\CommosIOTest2.java

F:\EclipseWorkspace\Java300\src\commosIO\CommosIOTest3.java

F:\EclipseWorkspace\Java300\src\ioStudy\Copy.java

F:\EclipseWorkspace\Java300\src\ioStudy\DecorateStudy1.java

F:\EclipseWorkspace\Java300\src\ioStudy\DirStudy.java

F:\EclipseWorkspace\Java300\src\ioStudy\IOstudy1.java

F:\EclipseWorkspace\Java300\src\ioStudy\IOstudy2.java

F:\EclipseWorkspace\Java300\src\ioStudy\IOstudy3.java

F:\EclipseWorkspace\Java300\src\ioStudy\IOstudy4.java

F:\EclipseWorkspace\Java300\src\ioStudy\IOstudy5.java

F:\EclipseWorkspace\Java300\src\ioStudy\IOstudy6.java

F:\EclipseWorkspace\Java300\src\ioStudy\IOstudy7.java

F:\EclipseWorkspace\Java300\src\test\stringTest\ArrayCopy1.java

F:\EclipseWorkspace\Java300\src\test\stringTest\MyArrayList.java

F:\EclipseWorkspace\Java300\src\test\stringTest\MyHashMap.java

F:\EclipseWorkspace\Java300\src\test\stringTest\TestBubbleSort.java

F:\EclipseWorkspace\Java300\src\test\stringTest\TestCollection.java

F:\EclipseWorkspace\Java300\src\test\stringTest\TestString.java

-----------------------------

F:\EclipseWorkspace\Java300\order.txt

F:\EclipseWorkspace\Java300\output.txt

F:\EclipseWorkspace\Java300\src\commosIO\CommosIOTest1.java

F:\EclipseWorkspace\Java300\src\commosIO\CommosIOTest2.java

F:\EclipseWorkspace\Java300\src\commosIO\CommosIOTest3.java

F:\EclipseWorkspace\Java300\src\ioStudy\Copy.java

F:\EclipseWorkspace\Java300\src\ioStudy\DecorateStudy1.java

F:\EclipseWorkspace\Java300\src\ioStudy\DirStudy.java

F:\EclipseWorkspace\Java300\src\ioStudy\IOstudy1.java

F:\EclipseWorkspace\Java300\src\ioStudy\IOstudy2.java

F:\EclipseWorkspace\Java300\src\ioStudy\IOstudy3.java

F:\EclipseWorkspace\Java300\src\ioStudy\IOstudy4.java

F:\EclipseWorkspace\Java300\src\ioStudy\IOstudy5.java

F:\EclipseWorkspace\Java300\src\ioStudy\IOstudy6.java

F:\EclipseWorkspace\Java300\src\ioStudy\IOstudy7.java

F:\EclipseWorkspace\Java300\src\test\stringTest\ArrayCopy1.java

F:\EclipseWorkspace\Java300\src\test\stringTest\MyArrayList.java

F:\EclipseWorkspace\Java300\src\test\stringTest\MyHashMap.java

F:\EclipseWorkspace\Java300\src\test\stringTest\TestBubbleSort.java

F:\EclipseWorkspace\Java300\src\test\stringTest\TestCollection.java

F:\EclipseWorkspace\Java300\src\test\stringTest\TestString.java

F:\EclipseWorkspace\Java300\test.txt

F:\EclipseWorkspace\Java300\testcopy.txt

文件读写

 1 package commosIO;

 import java.io.File;

 import java.io.IOException;

 import java.util.List;

 import org.apache.commons.io.FileUtils;

 public class CommosIOTest2 {

     public static void main(String[] args) throws IOException {

         //读取文件

         String s = FileUtils.readFileToString(new File("output.txt") , "GBK");

         System.out.println(s);

         System.out.println("-----------------");

         byte[] datas = FileUtils.readFileToByteArray(new File("output.txt"));

         System.out.println(datas.length);

         System.out.println("-----------------");

         //逐行读取

         List<String> list = FileUtils.readLines(new File("output.txt"),"GBK");

         for(String temp:list) {

             System.out.println(temp);

         }

         System.out.println("-----------------");

         //写文件  追加

         FileUtils.write(new File("output.txt"), "锄禾日当午\r\n","GBK");

         FileUtils.write(new File("output.txt"), "汗滴禾下土","GBK",true);

     }

 }

输出：

锄禾日当午

汗滴禾下土

-----------------

22

-----------------

锄禾日当午

汗滴禾下土

-----------------

文件拷贝

 1 package commosIO;

 import java.io.File;

 import java.io.IOException;

 import java.net.URL;

 import org.apache.commons.io.FileUtils;

 import org.apache.commons.io.IOUtils;

 public class CommosIOTest3 {

     public static void main(String[] args) throws IOException {

         //复制文件

         FileUtils.copyFile(new File("a.jpg"), new File("a-coyp.jpg"));

         //复制文件到目录

         FileUtils.copyFileToDirectory(new File("a.jpg"), new File("temp"));

         //复制目录到目录

         //复制目录等  查看文档  大同小异

         //拷贝url内容

         FileUtils.copyURLToFile(new URL("http://www.baidu.com"), new File("order.txt"));

         String datas = IOUtils.toString(new URL("http://www.baidu.com"),"UTF-8");

         System.out.println(datas);

     }

 }

Commons_IO_FileUtils的使用的更多相关文章

随机推荐

EEPlat的控制器概念
控制器是EEPlat平台界面层部分的核心概念.平台中界面展示都是通过平台的各种控制器综合控制输出的. EEPlat平台的界面层模型採用了HMVC模式.HMVC模式的採用使得EEPlat平台界面层可以实 ...
关注PHPthinking官网微信公众号——红包来袭
欢迎大家扫描关注PHPthinking官方微信订阅号,我们将给您定期发送质量博文.新闻趣事.站点公告等等,同一时候还有PHPthinking准备的每日微信红包(金额不等,已发出百元红包)等着你! 官网 ...
Android学习笔记-获取手机内存，SD卡存储空间。
前面介绍到如何保存数据到手机内存或者SD卡,但是问题是,在保存以前,我们还需要对他们的空间(可用空间),进行判断,才可以进行后续操作,所以,本节我们就介绍如何获取手机内存以及Sd卡的空间. //这时获 ...
加载jQuery库
使用google <head> <script type="text/javascript" src="http://ajax.googleapis.c ...
presentModalViewController和dismissModalViewControllerAnimated的使用总结
在实际开发中,如果要弹出视图: 我们常用到presentModalViewController方法和dismissModalViewControllerAnimated方法. presentModal ...
[翻译]NUnit---Action Attributes(八)
Attributes NUnit 1.0使用传统的基于继承和命名约定来识别测试.从2.0开始NUnit使用自定义特性来实现. 因为NUnit的test fixtures不是从框架类库继承,所以开发人员 ...
[Codeforces Education Round 6E] New Year Tree
[题目链接] https://codeforces.com/contest/620/problem/E [算法] 显然 , 一棵子树的DFS序必然为连续的一段用线段树维护颜色数即可 [代码] #in ...
【单独编译使用WebRTC的音频处理模块 - android】
更新 [2015年2月15日] Bill 这段时间没有再关注 WebRTC 以及音频处理的相关信息,且我个人早已不再推荐单独编译 WebRTC 中的各个模块出来使用.实际上本文的参考价值已经很小了,甚 ...
Tool：Adobe Photoshop
ylbtech-Tool-Adobe:Adobe Photoshop 1.返回顶部 1. Adobe Photoshop,简称“PS”,是由Adobe Systems开发和发行的图像处理软件. Pho ...
【168】ENVI入门系列
参考:ENVI-IDL中国的博客 [ENVI入门系列]01.ENVI产品简介与入门 [ENVI入门系列]02.自定义坐标系(北京54.西安80.2000坐标系) [ENVI入门系列]03.基于自带定位 ...

Commons_IO_FileUtils的使用

Commons_IO_FileUtils的使用的更多相关文章

随机推荐

热门专题