写文件的简单问题-->高手请进

Question

整个文件夹都可以import java.io.*;
import java.util.*;public class fileCopy
{
        public static void main(String[] args)
        {
                fileCopy test = new fileCopy();
                test.copyTo(new StringBuffer("F:/AppServer/Tomcat 5.0/conf"),
                            new StringBuffer("f:/DOCCOPY"));
        }        public void copyTo (StringBuffer s_path, StringBuffer t_path)
        {
                File s_file = new File(s_path.toString());
                File t_file = new File(t_path.toString());
                if (!t_file.exists())
                        t_file.mkdir();
                File[] files = s_file.listFiles();
                for (int i = 0; i < files.length; i++)
                {
                        System.out.println(files[i].getName());
                        if (files[i].isDirectory())
                        {
                StringBuffer s_subPath = new StringBuffer(s_path.toString());
                StringBuffer t_subPath = new StringBuffer(t_path.toString());
                                t_subPath.append("/");
                                s_subPath.append("/");
                                t_subPath.append(files[i].getName());
                                s_subPath.append(files[i].getName());
                                File subDir = new File(t_subPath.toString());
                                if (subDir.mkdir())
                                        copyTo(s_subPath, t_subPath);
                        }
                        else if (files[i].isFile())
                        {
        File t_subFile = new File(t_path.toString() + "/" + files[i].getName());
        File s_subFile = new File(s_path.toString() + "/" + files[i].getName());
                                try
                                {
                FileInputStream fin = new FileInputStream(files[i]);
                FileOutputStream fout = new FileOutputStream(t_subFile);
                                        int length;
                                        while ((length = fin.read()) != -1)
                                        {
                                        byte[] buffer = new byte[1024];
                                        fin.read(buffer, 0, length);
                                        fout.write(buffer, 0, length);
                                        }
                                }
                                catch (IOException ioe)
                                {
                                }
                                catch (Exception e)
                                {
                                }                        }
                }
        }
}

Answer 1

一个是FileInputStream("E:\aaa.txt")
一个时FileOutputStream("E:\bbb.txt")
这样就OK拉。

Answer 2

to: kengking(kengking) 
你能说得详细一点吗??????真的很急......谢谢各位.......
小弟在线等..................

Answer 3

import java.io.*;public class StreamOper
{
private FileWriter fw;
private BufferedWriter bw;
         String filename;
StreamOper()
{
}

public void streamWrite(String filename)
{
                  this.filename=filename;
try
{
fw=new FileWriter(filenametrue);
bw=new BufferedWriter(fw);
bw.newLine();
}
catch(IOException ex)
{
ex.printStackTrace();
System.err.println("Stream wrong:"+ex.getMessage());
} }

public void streamClose()
{
try
{
fw.close();
bw.close();
}
        catch(IOException exp)
        {
        exp.printStackTrace();
        System.err.println("Stream wrong:"+exp.getMessage());
        }
}
}

Answer 4

能提供一个能用的源码吗????
类似这样运行的.......java CreatFile E:\aaa.txt E:\bbb.txt这个应该不是很难,只缘我很菜..............

Answer 5

import java.io.*;
public class CreatFile
{
public static void main(String args[])
{
 try{
 FileInputStream filein=new FileInputStream(args[0]);
 FileOutputStream fileout= new FileOutputStream(args[1]);
 while(filein.available()>0)
 {  fileout.write(filein.read());
 }
     }catch(Exception e)
     {System.out.println(e.toString());}}
}
编译可以通过
运行时要注意不是： java CreatFile E:\aaa.txt E:\bbb.txt
            而是： java CreatFile E:\\aaa.txt E:\\bbb.txt
在字符串中两个‘\’才算一个‘\’
由于是例子没有注意性能.txt文件应该没问题，要是大文件就要缓冲区了。
我不是高手，高手不回答这样的问题。另外给我点分，我快三个库头了，:).   

Answer 6

可实现文件拷贝,文件夹自己实现吧.import java.io.*;
import java.util.*;public class Copyfile
{
public static void main(String[] args)
{
if(args.length==2)
{
String sourceName=args[0];
String targetName=args[1];
File sfile=new File(sourceName);

if(sfile.isFile())
{
try{
FileInputStream in=new FileInputStream(sfile);
FileOutputStream out=new FileOutputStream(targetName);
int length;

while((length=in.read())!=-1)
{
byte[] buf=new byte[1024];
in.read(buf,0,length);
out.write(buf,0,length);
}
}catch(IOException e)
{
System.out.println(e.toString());
}
}
else
{
System.out.println("Source file doesn't exist!");
}
}
else
{
System.out.println("命格式不对:java Copyfile sfiledir tfiledir");
}
}
}