【求助】文件拷贝不覆盖源文件/目录
使用apache的commons.io包FileUtils.copyDirectory方法对目录文件进行拷贝，请问怎么样才能让拷贝不覆盖原有的同名文件或文件夹？？？求大神教育，多谢：） apache java 文件拷贝 --------------------编程问答-------------------- 这个方法我没用过，如果单单只提供了这一个方法的话，那么只能自己写方法了。
不过我感觉写jar包的人不会想不到这点，
FileUtils中肯定还有多参数的copyDirectory方法 --------------------编程问答--------------------
(⊙v⊙)嗯
看了下源代码，还有其他参数可以传，但是没看明白~
/**
* Copies a whole directory to a new location preserving the file dates.
* <p>
* This method copies the specified directory and all its child
* directories and files to the specified destination.
* The destination is the new location and name of the directory.
* <p>
* The destination directory is created if it does not exist.
* If the destination directory did exist, then this method merges
* the source with the destination, with the source taking precedence.
*
* @param srcDir an existing directory to copy, must not be <code>null</code>
* @param destDir the new directory, must not be <code>null</code>
*
* @throws NullPointerException if source or destination is <code>null</code>
* @throws IOException if source or destination is invalid
* @throws IOException if an IO error occurs during copying
* @since Commons IO 1.1
*/
public static void copyDirectory(File srcDir, File destDir) throws IOException {
copyDirectory(srcDir, destDir, true);
}
/**
* Copies a whole directory to a new location.
* <p>
* This method copies the contents of the specified source directory
* to within the specified destination directory.
* <p>
* The destination directory is created if it does not exist.
* If the destination directory did exist, then this method merges
* the source with the destination, with the source taking precedence.
*
* @param srcDir an existing directory to copy, must not be <code>null</code>
* @param destDir the new directory, must not be <code>null</code>
* @param preserveFileDate true if the file date of the copy
* should be the same as the original
*
* @throws NullPointerException if source or destination is <code>null</code>
* @throws IOException if source or destination is invalid
* @throws IOException if an IO error occurs during copying
* @since Commons IO 1.1
*/
public static void copyDirectory(File srcDir, File destDir,
boolean preserveFileDate) throws IOException {
copyDirectory(srcDir, destDir, null, preserveFileDate);
}
/**
* Copies a filtered directory to a new location preserving the file dates.
* <p>
* This method copies the contents of the specified source directory
* to within the specified destination directory.
* <p>
* The destination directory is created if it does not exist.
* If the destination directory did exist, then this method merges
* the source with the destination, with the source taking precedence.
*
* <h4>Example: Copy directories only</h4>
* <pre>
* // only copy the directory structure
* FileUtils.copyDirectory(srcDir, destDir, DirectoryFileFilter.DIRECTORY);
* </pre>
*
* <h4>Example: Copy directories and txt files</h4>
* <pre>
* // Create a filter for ".txt" files
* IOFileFilter txtSuffixFilter = FileFilterUtils.suffixFileFilter(".txt");
* IOFileFilter txtFiles = FileFilterUtils.andFileFilter(FileFileFilter.FILE, txtSuffixFilter);
*
* // Create a filter for either directories or ".txt" files
* FileFilter filter = FileFilterUtils.orFileFilter(DirectoryFileFilter.DIRECTORY, txtFiles);
*
* // Copy using the filter
* FileUtils.copyDirectory(srcDir, destDir, filter);
* </pre>
*
* @param srcDir an existing directory to copy, must not be <code>null</code>
* @param destDir the new directory, must not be <code>null</code>
* @param filter the filter to apply, null means copy all directories and files
* should be the same as the original
*
* @throws NullPointerException if source or destination is <code>null</code>
* @throws IOException if source or destination is invalid
* @throws IOException if an IO error occurs during copying
* @since Commons IO 1.4
*/
public static void copyDirectory(File srcDir, File destDir,
FileFilter filter) throws IOException {
copyDirectory(srcDir, destDir, filter, true);
}
/**
* Copies a filtered directory to a new location.
* <p>
* This method copies the contents of the specified source directory
* to within the specified destination directory.
* <p>
* The destination directory is created if it does not exist.
* If the destination directory did exist, then this method merges
* the source with the destination, with the source taking precedence.
*
* <h4>Example: Copy directories only</h4>
* <pre>
* // only copy the directory structure
* FileUtils.copyDirectory(srcDir, destDir, DirectoryFileFilter.DIRECTORY, false);
* </pre>
*
* <h4>Example: Copy directories and txt files</h4>
* <pre>
* // Create a filter for ".txt" files
* IOFileFilter txtSuffixFilter = FileFilterUtils.suffixFileFilter(".txt");
* IOFileFilter txtFiles = FileFilterUtils.andFileFilter(FileFileFilter.FILE, txtSuffixFilter);
*
* // Create a filter for either directories or ".txt" files
* FileFilter filter = FileFilterUtils.orFileFilter(DirectoryFileFilter.DIRECTORY, txtFiles);
*
* // Copy using the filter
* FileUtils.copyDirectory(srcDir, destDir, filter, false);
* </pre>
*
* @param srcDir an existing directory to copy, must not be <code>null</code>
* @param destDir the new directory, must not be <code>null</code>
* @param filter the filter to apply, null means copy all directories and files
* @param preserveFileDate true if the file date of the copy
* should be the same as the original
*
* @throws NullPointerException if source or destination is <code>null</code>
* @throws IOException if source or destination is invalid
* @throws IOException if an IO error occurs during copying
* @since Commons IO 1.4
*/
public static void copyDirectory(File srcDir, File destDir,
FileFilter filter, boolean preserveFileDate) throws IOException {
if (srcDir == null) {
throw new NullPointerException("Source must not be null");
}
if (destDir == null) {
throw new NullPointerException("Destination must not be null");
}
if (srcDir.exists() == false) {
throw new FileNotFoundException("Source '" + srcDir + "' does not exist");
}
if (srcDir.isDirectory() == false) {
throw new IOException("Source '" + srcDir + "' exists but is not a directory");
}
if (srcDir.getCanonicalPath().equals(destDir.getCanonicalPath())) {
throw new IOException("Source '" + srcDir + "' and destination '" + destDir + "' are the same");
}
// Cater for destination being directory within the source directory (see IO-141)
List exclusionList = null;
if (destDir.getCanonicalPath().startsWith(srcDir.getCanonicalPath())) {
File[] srcFiles = filter == null ? srcDir.listFiles() : srcDir.listFiles(filter);
if (srcFiles != null && srcFiles.length > 0) {
exclusionList = new ArrayList(srcFiles.length);
for (int i = 0; i < srcFiles.length; i++) {
File copiedFile = new File(destDir, srcFiles[i].getName());
exclusionList.add(copiedFile.getCanonicalPath());
}
}
}
doCopyDirectory(srcDir, destDir, filter, preserveFileDate, exclusionList);
}
/**
* Internal copy directory method.
*
* @param srcDir the validated source directory, must not be <code>null</code>
* @param destDir the validated destination directory, must not be <code>null</code>
* @param filter the filter to apply, null means copy all directories and files
* @param preserveFileDate whether to preserve the file date
* @param exclusionList List of files and directories to exclude from the copy, may be null
* @throws IOException if an error occurs
* @since Commons IO 1.1
*/
private static void doCopyDirectory(File srcDir, File destDir, FileFilter filter,
boolean preserveFileDate, List exclusionList) throws IOException {
if (destDir.exists()) {
if (destDir.isDirectory() == false) {
throw new IOException("Destination '" + destDir + "' exists but is not a directory");
}
} else {
if (destDir.mkdirs() == false) {
throw new IOException("Destination '" + destDir + "' directory cannot be created");
}
if (preserveFileDate) {
destDir.setLastModified(srcDir.lastModified());
}
}
if (destDir.canWrite() == false) {
throw new IOException("Destination '" + destDir + "' cannot be written to");
}
// recurse
File[] files = filter == null ? srcDir.listFiles() : srcDir.listFiles(filter);
if (files == null) { // null if security restricted
throw new IOException("Failed to list contents of " + srcDir);
}
for (int i = 0; i < files.length; i++) {
File copiedFile = new File(destDir, files[i].getName());
if (exclusionList == null || !exclusionList.contains(files[i].getCanonicalPath())) {
if (files[i].isDirectory()) {
doCopyDirectory(files[i], copiedFile, filter, preserveFileDate, exclusionList);
} else {
doCopyFile(files[i], copiedFile, preserveFileDate);
}
}
}
} --------------------编程问答-------------------- 不覆盖新生成的文件叫什么名啊 --------------------编程问答--------------------
什么意思？ --------------------编程问答-------------------- 拷贝的时候重新命名一下：如：拷贝时间+原文件名！
补充：Java , Java SE
