在java中如何将一个文件复制到另外一个地方(我想文件内容一样，名字不一样)?急啊__new_System_println_File_public_

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在java中如何将一个文件复制到另外一个地方(我想文件内容一样，名字不一样)?急啊

来源: 互联网发布时间：2015-03-14

本文导语: 各位老大，急用啊，给个代码？ | package myutils; import java.io.*; import java.util.*; /** 目录文件拷贝(jdk) @version v1.0 2001-9-27 @auther Qixy */ public class Copy { /** Null & s...

各位老大，急用啊，给个代码？

package myutils;
import java.io.*;
import java.util.*;
/**
目录文件拷贝(jdk)
@version v1.0  2001-9-27
@auther Qixy
*/

public class Copy {
      /**
        Null & simple construct .
      */
       public Copy()
      {
                              //void to construct for a class !

      }
    /**
      Application main 使用方法

usage:java Copy [-x（包含子目录）] s_dirorfile（源文件夹/文件） t_dirorfile(目标文件夹/文件)
    */

    public static void usage()
      {
        System.out.println("usage:java Copy -x [s_dirorfile] [t_dirorfile]");
         System.exit(0);
         return;
      }
    /**
      Application main entrance
      @see usage
    */
    public static void main(String[] args) throws IOException {

    /** To be corrected ... */
     boolean bx=false;
     Copy c=new Copy();
     //test ...
     File ff=new File("e:\eeeee\dfe\s.x");
     System.out.println("ff.getAbsolutePath()="+ff.getAbsolutePath());
     System.out.println("ff.getName()="+ff.getName());
          System.out.println("ff.getPath()="+ff.getPath());
          DayTime dt=new DayTime();
     for(int ii=0;ii filepointer)
  {
     filepointer = fff.getFilePointer();
     sss = fff.readLine();
     System.out.println("filepointer : "+filepointer+"  "+sss);

  }
  fff.close();
    }
    catch(FileNotFoundException dd)
    {
      System.out.println("no file");
    }
    catch(IOException s)
    {
      System.out.println("read file error");
    }

save to

RandomAccessFile fffd;
String file = "d:\aa.txt";
try
{
     fffd =new RandomAccessFile(file,"rw");
    fffd.writeChars(sss) ;
   fff.close();
    }
    catch(FileNotFoundException dd)
    {
      System.out.println("no file");
    }
    catch(IOException s)
    {
      System.out.println("read file error");
    }

import java.io.*;

public class Copy {
    public static void main(String[] args) throws IOException {
File inputFile = new File("farrago.txt");
File outputFile = new File("outagain.txt");

        FileReader in = new FileReader(inputFile);
        FileWriter out = new FileWriter(outputFile);
        int c;

        while ((c = in.read()) != -1)
           out.write(c);

        in.close();
        out.close();
    }
}

這個是 SUN's own example.

void copyFile(File destfile, File srcfile){

byte[] bytearray = new byte[512];
int len = 0;
FileInputStream input = new FileInputStream(srcfile);
FileOutputStream output = new FileOutputStream(destfile);
try {
while ((len = input.read(bytearray)) != -1) {
output.write(bytearray, 0, len);
}
} catch (FileNotFoundException exc) {
exc.printStackTrace();
} catch (SecurityException exc) {
exc.printStackTrace();
} finally {
input.close();
output.close();
}

我也来
import java.io.*;

public class jCOPY {
  public static void main(String args[]){
    try {
      jCOPY j = new jCOPY();
      j.CopyFile(new File(args[0]),new File(args[1]));
      }
    catch (Exception e) {
      e.printStackTrace();
      }
    }

  public void CopyFile(File in, File out) throws Exception {
    FileInputStream fis  = new FileInputStream(in);
    FileOutputStream fos = new FileOutputStream(out);
    byte[] buf = new byte[1024];
    int i = 0;
    while((i=fis.read(buf))!=-1) {
      fos.write(buf, 0, i);
      }
    fis.close();
    fos.close();
    }
  }