在线等：用File类copy文件的时候怎么使源文件保留？

[千山独行]

我想实现这样的功能：在某个目录下有一个文件，想把它copy到其他目录下，我写了一些代码，怎么发现是把源文件剪切到其他目录下了，怎么在copy的同时，源文件不动呢？

[shine333]

用一个FileInputStream和一个FileOutputStream配对使用

[shine333]

从FileInputStream里面读，往FileOutputStream里面写不就可以了

[tomcatjava]

import java.io.*;

public class FileCopy
{
private File src = null;
private File des = null;

public FileCopy( File src,File des ) {
this.src = src;
this.des = des;
}

public boolean copy() {
try{
BufferedReader in = new BufferedReader(
new FileReader(src) );
BufferedWriter out = new BufferedWriter(
new FileWriter(des) );
String line = null;
StringBuffer t = new StringBuffer("");
while( (line = in.readLine()) != null ) {
t.append( line + "\r\n" );
}
in.close();
out.write( t.toString() );
out.flush();
out.close();
}
catch( IOException e ) {
System.out.println( "Wrong" );
return false;
}

return true;
}

public static void main( String args[] ) {
File src = new File( ".","FileCopy.java" );
File des = new File( ".","Copy.java" );
FileCopy copy = new FileCopy( src,des );
copy.copy();
}
}