目录文件的操作
移动文件,相当于linux 中mv命令,但与平台无关:
/**
* This class moves an input file to output file
*
* @param String input file to move from
* @param String output file
*
*/
public static void move (String input, String output){
File inputFile = new File(input);
File outputFile = new File(output);
inputFile.renameTo(outputFile);
}
拷贝文件,相当于linux中cp命令,但与平台无关,可以拷贝文本 或二进制文件:
/**
* This class copies an input file to output file
*
* @param String input file to copy from
* @param String output file
*/
public static boolean copy(String input, String output) throws Exception{
int BUFSIZE = 65536;
try{
FileInputStream fis = new FileInputStream(input);
FileOutputStream fos = new FileOutputStream(output);
int s;
byte[] buf = new byte[BUFSIZE];
while ((s = fis.read(buf)) > -1 ){
fos.write(buf, 0, s);
}
}catch (Exception ex) {
throw new Exception("makehome"+ex.getMessage());
}
return true;
}
拷贝目录,下例只可以拷贝目录中的文件:
/**
* This class copies an input files of a directory to another directory not include subdir
*
* @param String sourcedir the directory to copy from such as:/home/bqlr/images
* @param String destdir the target directory
*/
public static void CopyDir(String sourcedir,String destdir) throws Exception
{
File dest = new File(destdir);
File source = new File(sourcedir);
String [] files= source.list();
try
{
destdir.mkdirs();
}catch (Exception ex) {
throw new Exception("CopyDir:"+ex.getMessage());
}
for (int i = 0; i < files.length; i++)
{
String sourcefile = source+File.separator+files[i];
String destfile = dest+File.separator+files[i];
File temp = new File(sourcefile);
if (temp.isFile()){
try{
copy(sourcefile,destfile);
}catch (Exception ex) {
throw new Exception("CopyDir:"+ex.getMessage());
}
}
}
}
删除目录.包括目录下所有文件和目录:
/**
* This class del a directory recursively,that means delete all files and directorys.
*
* @param File directory the directory that will be deleted.
*/
public static void recursiveRemoveDir(File directory) throws Exception
{
if (!directory.exists())
throw new IOException(directory.toString()+" do not exist!");
String[] filelist = directory.list();
File tmpFile = null;
for (int i = 0; i < filelist.length; i++) {
tmpFile = new File(directory.getAbsolutePath(),filelist[i]);
if (tmpFile.isDirectory()) {
recursiveRemoveDir(tmpFile);
} else if (tmpFile.isFile()) {
tmpFile.delete();
}
}
directory.delete();
}