【www.bbyears.com--excel】
1. 区分本地磁盘，可移动磁盘，驱动盘
代码如下package com.lvjava;
import java.io.File;
import javax.swing.filechooser.FileSystemView;
public class FileSystemTest {
private final static String localDiskName = "本地磁盘";
private final static String removableDiskName = "可移动磁盘";
private final static String enLocalDiskName = "Local Disk";
private final static String enRemovableDiskName = "Removable Disk";
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
FileSystemView fileSystemView = FileSystemView.getFileSystemView();
File[] roots = File.listRoots();
for (File file : roots) {
String diskName = fileSystemView.getSystemTypeDescription(file);
System.out.println(diskName);
if (diskName.startsWith(localDiskName)
|| diskName.startsWith(enLocalDiskName)) {// 当磁盘为本地磁盘或可移动磁盘
//Do something
} else if (diskName.startsWith(removableDiskName)
|| diskName.startsWith(enRemovableDiskName)) {
//Do something
}
}
}
}
运行代码输出如下：
本地磁盘
本地磁盘
本地磁盘
本地磁盘
CD 驱动器
CD 驱动器
可移动磁盘
2. Java代码复制文件
代码如下/**
* Moving a File to Another Directory
* @param srcFile eg: c:windowsabc.txt
* @param destPath eg: c:temp
* @return success
*/
public static boolean move(String srcFile, String destPath){
// File (or directory) to be moved
File file = new File(srcFile);
// Destination directory
File dir = new File(destPath);
// Move file to new directory and return result
return file.renameTo(new File(dir, file.getName()));
}
下面分享一个类，可以复制文件夹与文件
代码如下package com.xuanwu.mtoserver.util;
import java.io.*;
/**
* @author Toby 复制文件夹或文件夹
*/
public class FileUtil {
public static void main(String args[]) throws IOException {
// 源文件夹
String url1 = "D:/user/test/";
// 目标文件夹
String url2 = "D:/user/testcopy/";
// 创建目标文件夹
(new File(url2)).mkdirs();
// 获取源文件夹当前下的文件或目录
File[] file = (new File(url1)).listFiles();
for (int i = 0; i < file.length; i++) {
if (file[i].isFile()) {
// 复制文件
String type = file[i].getName().substring(file[i].getName().lastIndexOf(".") + 1);
if (type.equalsIgnoreCase("txt"))// 转码处理
copyFile(file[i], new File(url2 + file[i].getName()), MTOServerConstants.CODE_UTF_8, MTOServerConstants.CODE_GBK);
else
copyFile(file[i], new File(url2 + file[i].getName()));
}
if (file[i].isDirectory()) {
// 复制目录
String sourceDir = url1 + File.separator + file[i].getName();
String targetDir = url2 + File.separator + file[i].getName();
copyDirectiory(sourceDir, targetDir);
}
}
}
// 复制文件
public static void copyFile(File sourceFile, File targetFile) throws IOException {
BufferedInputStream inBuff = null;
BufferedOutputStream outBuff = null;
try {
// 新建文件输入流并对它进行缓冲
inBuff = new BufferedInputStream(new FileInputStream(sourceFile));
// 新建文件输出流并对它进行缓冲
outBuff = new BufferedOutputStream(new FileOutputStream(targetFile));
// 缓冲数组
byte[] b = new byte[1024 * 5];
int len;
while ((len = inBuff.read(b)) != -1) {
outBuff.write(b, 0, len);
}
// 刷新此缓冲的输出流
outBuff.flush();
} finally {
// 关闭流
if (inBuff != null)
inBuff.close();
if (outBuff != null)
outBuff.close();
}
}
// 复制文件夹
public static void copyDirectiory(String sourceDir, String targetDir) throws IOException {
// 新建目标目录
(new File(targetDir)).mkdirs();
// 获取源文件夹当前下的文件或目录
File[] file = (new File(sourceDir)).listFiles();
for (int i = 0; i < file.length; i++) {
if (file[i].isFile()) {
// 源文件
File sourceFile = file[i];
// 目标文件
File targetFile = new File(new File(targetDir).getAbsolutePath() + File.separator + file[i].getName());
copyFile(sourceFile, targetFile);
}
if (file[i].isDirectory()) {
// 准备复制的源文件夹
String dir1 = sourceDir + "/" + file[i].getName();
// 准备复制的目标文件夹
String dir2 = targetDir + "/" + file[i].getName();
copyDirectiory(dir1, dir2);
}
}
}
/**
*
* @param srcFileName
* @param destFileName
* @param srcCoding
* @param destCoding
* @throws IOException
*/
public static void copyFile(File srcFileName, File destFileName, String srcCoding, String destCoding) throws IOException {// 把文件转换为GBK文件
BufferedReader br = null;
BufferedWriter bw = null;
try {
br = new BufferedReader(new InputStreamReader(new FileInputStream(srcFileName), srcCoding));
bw = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(destFileName), destCoding));
char[] cbuf = new char[1024 * 5];
int len = cbuf.length;
int off = 0;
int ret = 0;
while ((ret = br.read(cbuf, off, len)) > 0) {
off += ret;
len -= ret;
}
bw.write(cbuf, 0, off);
bw.flush();
} finally {
if (br != null)
br.close();
if (bw != null)
bw.close();
}
}
/**
*
* @param filepath
* @throws IOException
*/
public static void del(String filepath) throws IOException {
File f = new File(filepath);// 定义文件路径
if (f.exists() && f.isDirectory()) {// 判断是文件还是目录
if (f.listFiles().length == 0) {// 若目录下没有文件则直接删除
f.delete();
} else {// 若有则把文件放进数组，并判断是否有下级目录
File delFile[] = f.listFiles();
int i = f.listFiles().length;
for (int j = 0; j < i; j++) {
if (delFile[j].isDirectory()) {
del(delFile[j].getAbsolutePath());// 递归调用del方法并取得子目录路径
}
delFile[j].delete();// 删除文件
}
}
}
}
}