/*
将"C:\\JavaProducts\\Source"下的所有数据复制到"C:\\Target"下
*/ import java.io.*; public class JavaCopyDemo{
final static String SOURCESTRING = "C:\\JavaProducts\\Source";
final static String TARGETSTRING = "C:\\Target"; public static void main(String[] args){
if(!(new File(SOURCESTRING)).exists()){
System.out.println("源文件" + SOURCESTRING + "不存在，无法复制！");
return;
}else if((new File(TARGETSTRING)).exists()){
System.out.println("目标文件" + TARGETSTRING + "已经存在，无法复制！");
return;
}else{
if((new File(SOURCESTRING)).isFile()){
copyFile(new File(SOURCESTRING),new File(TARGETSTRING));
}else if((new File(SOURCESTRING)).isDirectory()){
copyDirectory(SOURCESTRING,TARGETSTRING);
}
}
} private static void copyFile(File sourceFile,File targetFile){
if(!sourceFile.canRead()){
System.out.println("源文件" + sourceFile.getAbsolutePath() + "不可读，无法复制！");
return;
}else{
System.out.println("开始复制文件" + sourceFile.getAbsolutePath() + "到" + targetFile.getAbsolutePath());
FileInputStream fis = null;
BufferedInputStream bis = null;
FileOutputStream fos = null;
BufferedOutputStream bos = null; try{
fis = new FileInputStream(sourceFile);
bis = new BufferedInputStream(fis);
fos = new FileOutputStream(targetFile);
bos = new BufferedOutputStream(fos);
int len = 0;
while((len = bis.read()) != -1){
bos.write(len);
}
bos.flush(); }catch(FileNotFoundException e){
e.printStackTrace();
}catch(IOException e){
e.printStackTrace();
}finally{
try{
if(fis != null){
fis.close();
}
if(bis != null){
bis.close();
}
if(fos != null){
fos.close();
}
if(bos != null){
bos.close();
}
System.out.println("文件" + sourceFile.getAbsolutePath() + "复制到" + targetFile.getAbsolutePath() + "完成");
}catch(IOException e){
e.printStackTrace();
}
}
}
} private static void copyDirectory(String sourcePathString,String targetPathString){
if(!new File(sourcePathString).canRead()){
System.out.println("源文件夹" + sourcePathString + "不可读，无法复制！");
return;
}else{
(new File(targetPathString)).mkdirs();
System.out.println("开始复制文件夹" + sourcePathString + "到" + targetPathString);
File[] files = new File(sourcePathString).listFiles();
for(int i = 0; i < files.length; i++){
if(files[i].isFile()){
copyFile(new File(sourcePathString + File.separator + files[i].getName()),new File(targetPathString + File.separator + files[i].getName()));
}else if(files[i].isDirectory()){
copyDirectory(sourcePathString + File.separator + files[i].getName(),targetPathString + File.separator + files[i].getName());
}
}
System.out.println("复制文件夹" + sourcePathString + "到" + targetPathString + "结束");
}
}
}