作_操_件_文_Java

/*******************************************************************************
* Copyright(c) 2005-2009 Huawei Tech. Co., Ltd.
* All rights reserved.
*
* Author: xbliuc
* Date  : 2011-3-19
*******************************************************************************/
package com.rt.xbliuc.treeviewer;

import java.io.File;
import java.io.FilenameFilter;
import java.io.IOException;
import java.util.Date;

/**
* 文件操作
*/
public class FileTest
{
   
    /**
     * TODO 添加方法注释
     * @param args
     * @throws IOException
     */
    @SuppressWarnings("all")
    public static void main(String[] args) throws IOException
    {
        //文件
        //File file = new File("F:\\a.txt");
        //        System.out.println("文件是否存在: " + file.exists());
        //        System.out.println("文件是否可读: " + file.canRead());
        //        System.out.println("文件是否可写: " + file.canWrite());
        //        System.out.println("文件名: " + file.getName());
        //        System.out.println("获取文件或文件夹的根路径： " + file.getParent());
        //        System.out.println("文件路径: " + file.getPath());
        //        System.out.println("文件绝对路径: " + file.getAbsolutePath());
        //        System.out.println("判断是否是文件: " + file.isFile());
        //        System.out.println("判断是否是路径: " + file.isDirectory());
        //        System.out.println("文件最后一个修改的时间: " + file.lastModified());
        //        System.out.println("创建文件(如果文件存在就不创建)" + new File("F:\\b.txt"));
        //        System.out.println("获取文件或路径的正规路径:" + file.getCanonicalPath());
        //        System.out.println("删除当前文件： "+file.delete());
       
        //文件夹
        //File file2 = new File("F:\\FileTest");
        //        System.out.println("判断是否是路径:  " + file2.isDirectory());
        //        System.out.println("返回路径下的所有文件名:  " + file2.list());
        //        System.out.println("创建文件夹(父类不存在创建失败)："
        //                + new File("F:\\FileTest2").mkdir());
        //        System.out.println("创建文件夹(父类不存在,创建父目录)："
        //                + new File("F:\\b\\FileTest2").mkdirs());
        //getFileDatile("F:\\FileTest");
        //deleteFileDatile("F:\\FileTest");
        fileFilter("F:\\FileTest");

    //递归删除某个目录下的所有
    public static void operationFile(File file) throws IOException
    {
         File files = new File("F:\\abc.doc");
         if (!files.exists())//判断文件是否存在
         {
             files.createNewFile();
         }
         System.out.println(new File("F:\\aa\\bb\\cc").mkdirs());
         File[] files = file.listFiles();
         for (int i = 0; i < files.length; i++)
         {
            if (files[i].isDirectory())
            {
                operationFile(files[i]);
            }
            else
            {
                files[i].delete();//删除文件
                if (i == files.length - 1)
                {
                    file.delete();//删除文件夹
                }
            }
        }
    }

    //打印目录下的所有信息
    public static void operationFile(File file) throws IOException
    {
        System.out.println("文件夹：" + file.getName());
        File[] files = file.listFiles();
        for (int i = 0; i < files.length; i++)
        {
            if (files[i].isDirectory())
            {
                operationFile(files[i]);
            }
            else
            {
                System.out.println("文件：" + files[i].getName());
            }
        }
    }

   
    /**
     * 打印目录下的所有信息
     * @param filePath
     */
    @SuppressWarnings("nls")
    public static void getFileDatile(String filePath)
    {
        File file = new File(filePath);
        if (file.isDirectory())
        {
            System.out.println("文件夹名：" + file.getName());
            String[] list = file.list();
            for (String string : list)
            {
                File files = new File(filePath + "\\" + string);
                if (files.isDirectory())
                {
                    getFileDatile(filePath + "\\" + string);
                }
                else
                {
                    System.out.println("文件名: " + string + " | 是否可读: "
                            + files.canRead() + " | 最后修改时间: "
                            + new Date(file.lastModified()));
                }
            }
        }
    }
   
    /**
     * TODO 添加方法注释
     * @param filePath
     */
    @SuppressWarnings("all")
    public static void deleteFileDatile(String filePath)
    {
        File file = new File(filePath);
        if (file.list().length == 0)
        {
            file.delete();
        }
        if (file.isDirectory())
        {
            String[] list = file.list();
            for (String string : list)
            {
                File files = new File(filePath + "\\" + string);
                if (files.isDirectory())
                {
                    deleteFileDatile(filePath + "\\" + string);
                }
                else
                {
                    files.delete();
                }
            }
        }
    }
   
    /**
     * 文件过滤器
     * @param filePath
     */
    public static void fileFilter(String filePath)
    {
        File file = new File(filePath);
       
        FilenameFilter filter = new FilenameFilter()
        {
            @Override
            public boolean accept(File dir, String name)
            {
                File files = new File(dir, name);
                if (files.isFile() && name.indexOf(".txt") != -1) //$NON-NLS-1$
                {
                    return true;
                }
                return false;
            }
        };
       
        String[] str = file.list(filter);
        for (String string : str)
        {
            System.out.println(string);
        }
    }
}



//创建文件
    public static void createFile()
    {
        File file = new File("F:/", "lxb.txt"); //创建文件对象
        if (file.exists())
        {
            file.delete();
            System.out.println("文件已删除");
        }
        else
        {
            try
            {
                FileOutputStream out = new FileOutputStream(file);//创建FileOutputStream对象
                byte buy[] = "我有一只小猫".getBytes(); //创建byte型数组
                out.write(buy); //将数组信息写入到文件中
                out.close(); //关闭流
            }
            catch (Exception e1)
            {
                e1.printStackTrace();
            }
           
            try
            {
                FileInputStream in = new FileInputStream(file);//创建FileInputStream类对象
                byte byt[] = new byte[1024];//创建byt数组
                int len = in.read(byt);//从文件中读取数据
                System.out.println("文件中的信息是：" + new String(byt, 0, len));//打印
                in.close();//关闭流
            }
            catch (Exception e)
            {
                e.printStackTrace();
            }
           
        }
       
        //        try
        //        {
        //            file.createNewFile();
        //            String name = file.getName(); //获取文件名
        //            Long length = file.length(); //获取文件长度
        //            boolean hidden = file.isHidden(); //判断是否隐藏
        //            System.out.println("文件已创建");
        //            System.out.println("文件名称" + name);
        //            System.out.println("文件长度" + length);
        //            System.out.println("文件是否隐藏" + hidden);
        //        }
        //        catch (IOException e)
        //        {
        //            e.printStackTrace();
        //        }
        //        //}
        //    }
        //   
        //    //打印本地Ip
        //    public void aaaaa()
        //    {
        //        //System.out.println(this.username);
        //        InetAddress ip;
        //        try
        //        {
        //            ip = InetAddress.getLocalHost();
        //            String localname = ip.getHostName();
        //            String locaip = ip.getHostAddress();
        //            System.out.println(localname);
        //            System.out.println(locaip);
        //        }
        //        catch (Exception e)
        //        {
        //            e.printStackTrace();
        //        }
    }