java 文件操作 FileUtils

修改文件的最后修改时间

     //修改文件最后的修改日期
    public static void setLastModified(String address, Date date){
        try {
            File f = new File(address);

            //boolean
            //当且仅当不存在具有此抽象路径名指定名称的文件时，不可分地创建一个新的空文件
            f.createNewFile();

            //lastModified 获取指定文件的最后修改日期
            Date d = new Date(f.lastModified());
            System.out.println("原始修改日期为："+d.toString());

            //修改
            boolean falg =  f.setLastModified(date.getTime());//需要long类型
            System.out.println("修改："+falg);

            d = new Date(f.lastModified());
            System.out.println("修改后日期："+d.toString());

        } catch (IOException e) {
            e.printStackTrace();
        }

FileUtils.java

package com.xl.game.tool;
import java.io.*;
import java.util.*;

public class FileUtils
{
    /*
     * 列出目录下所有文件
     */
    public static Collection<File> listFiles(File file,String[] miniType,boolean ischeck)
    {
        ArrayList<File> filelist = new ArrayList();
        File[] files = file.listFiles();
        if(files==null){
            return filelist;
        }
        for(int i=0;i<files.length;i++)
        {
            if(files[i].isFile())
            {
            for(String type:miniType)
            if(files[i].getPath().endsWith(type))
            {
            filelist.add(files[i]);
            break;
            }
            }
            else 
            {
                Collection<File> filelist2 = listFiles(files[i],miniType,ischeck);
                for(File f:filelist2)
                filelist.add(f);
            }
        }
        return filelist;
    }

    public static Collection<File> listFiles(File file,boolean ischeck)
    {
        ArrayList<File> filelist = new ArrayList();
        File[] files = file.listFiles();
        for(int i=0;i<files.length;i++)
        {
            if(files[i].isFile())
            {
            filelist.add(files[i]);
            }
            else 
            {
                Collection<File> filelist2 = listFiles(files[i],ischeck);
                for(File f:filelist2)
                filelist.add(f);
            }
        }
        return filelist;
    }

    //批量删除目录下指定格式文件
    public static void removeFiles(File path,String[] name)
    {
        Collection<File> files = listFiles(path,name,true);
        for(File file:files)
        {
            file.delete();
        }
    }

    public static void writeText(String filename,String info,String coding) {
        System.out.println("writeText "+filename+" ");
        File file = new File(filename);

        try
        {
            if (file.isFile()){
                System.out.println("删除文件");
                file.delete();
            }
        }
        catch (Exception e)
        {
            e.printStackTrace();
        }
        try
        {
            FileOutputStream fileOutputStream = new FileOutputStream(file);
            fileOutputStream.write(info.getBytes(coding));
            fileOutputStream.close();
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }

    }

    public static String read(File file,String encoding) throws IOException
    {
        String content = "";
        //  File file = new File(path);

        if(file.isFile())
        {
            FileInputStream input= new FileInputStream(file);

            byte [] buf=new byte[input.available()];
            input.read(buf);
            content = new String(buf,encoding);
        }
        return content;
    }

    /**  
          *  复制单个文件  
          *  @param  oldPath  String  原文件路径  如：c:/fqf.txt  
          *  @param  newPath  String  复制后路径  如：f:/fqf.txt  
          *  @return  boolean  
          */
    public static void copyFile(String oldPath,String newPath)
    {
        try
        {
//           int  bytesum  =  0;  
            int byteread = 0;
            File oldfile = new File(oldPath); 
            if(oldfile.isFile())
            {//文件存在时  
                InputStream inStream=new FileInputStream(oldPath);//读入原文件 
                FileOutputStream out = new FileOutputStream(newPath);
                byte[] buffer = new byte[1444];
//               int  length;  
                while((byteread=inStream.read(buffer))!=-1)
                {
//                   bytesum  +=  byteread;  //字节数  文件大小  
//                   System.out.println(bytesum);  
                    out.write(buffer, 0, byteread); 
                }
                inStream.close();

                out.flush();
                    out.close();
            }
        }
        catch(Exception e)
        {
            System.out.println("复制单个文件操作出错"); 
            e.printStackTrace();

        }

    }

    /**  
          *  复制整个文件夹内容  
          *  @param  oldPath  String  原文件路径  如：c:/fqf  
          *  @param  newPath  String  复制后路径  如：f:/fqf/ff  
          *  @return  boolean  
          */
    public static void copyFolder(String oldPath,String newPath)
    {

        try
        {

            //Log.e("copyFolder", ""+oldPath+" "+newPath);
            new File(newPath).mkdirs();//如果文件夹不存在  则建立新文件夹  
            File a=new File(oldPath);
            String[] file=a.list();
            File temp=null;
            for(int i = 0; i<file.length; i++)
            {
                if(oldPath.endsWith(File.separator))
                {
                    temp=new File(oldPath+file[i]);
                }
                else
                {
                    temp=new File(oldPath+File.separator+file[i]);
                }

                if(temp.isFile())
                {
                    FileInputStream input= new FileInputStream(temp); 
                    FileOutputStream output=new FileOutputStream(newPath+"/"+
                    (temp.getName()).toString());
                    byte[] b = new byte[1024*5];
                    int len;
                    while((len=input.read(b))!=-1)
                    {
                        output.write(b, 0, len);
                    }
                    output.flush();
                    output.close();
                    input.close();
                }
                if(temp.isDirectory())
                {//如果是子文件夹  

                    copyFolder(oldPath+"/"+file[i], newPath+"/"+file[i]); 
                }
            }
        }
        catch(Exception e)
        {
            System.out.println("复制整个文件夹内容操作出错"); 
            e.printStackTrace();

        }

    }

    public static void copyFile(File file, String newPath) {
        // TODO Auto-generated method stub
        copyFile(file.getPath(), newPath);
    }

}

CopyFile.java