Java文件操作类封装(二)
r pw = new PrintWriter(fw);
String strContent = content;
pw.println(strContent);
pw.flush();
pw.close();
fw.close();
}
/**
* 删除文件夹
*
* @param folderPath
* 文件夹路径
*/
public static void delFolder(String folderPath) {
// 删除文件夹里面所有内容
delAllFile(folderPath);
String filePath = folderPath;
java.io.File myFilePath = new java.io.File(filePath);
// 删除空文件夹
myFilePath.delete();
}
/**
* 删除文件夹里面的所有文件
*
* @param path
* 文件夹路径
*/
public static void delAllFile(String path) {
File file = new File(path);
if (!file.exists()) {
return;
}
if (!file.isDirectory()) {
return;
}
String[] childFiles = file.list();
File temp = null;
for (int i = 0; i < childFiles.length; i++) {
// File.separator与系统有关的默认名称分隔符
// 在UNIX系统上，此字段的值为'/'；在Microsoft Windows系统上，它为 '\'。
if (path.endsWith(File.separator)) {
temp = new File(path + childFiles[i]);
} else {
temp = new File(path + File.separator + childFiles[i]);
}
if (temp.isFile()) {
temp.delete();
}
if (temp.isDirectory()) {
delAllFile(path + File.separatorChar + childFiles[i]);// 先删除文件夹里面的文件
delFolder(path + File.separatorChar + childFiles[i]);// 再删除空文件夹
}
}
}
/**
* 复制单个文件，传统方式
*
* @param srcFile
* 包含路径的源文件 如：E:/phsftp/src/abc.txt
* @param dirDest
* 目标文件目录；若文件目录不存在则自动创建 如：E:/phsftp/dest
* @throws IOException
*/
public static void copyFile(String srcFile, String dirDest)
throws IOException {
FileInputStream in = new FileInputStream(srcFile);
mkdir(dirDest);
FileOutputStream out = new FileOutputStream(dirDest + "/" + new File(srcFile).getName());
int len;
byte buffer[] = new byte[1024];
while ((len = in.read(buffer)) != -1) {
out.write(buffer, 0, len);
}
out.flush();
out.close();
in.close();
}
/**
* 复制文件夹
*
* @param oldPath
* String 源文件夹路径 如：E:/phsftp/src
* @param newPath
* String 目标文件夹路径 如：E:/phsftp/dest
* @return boolean
*/
public static void copyFolder(String oldPath, String newPath)
throws IOException {
// 如果文件夹不存在 则新建文件夹
mkdir(newPath);
File file = new File(oldPath);
String[] files = file.list();
File temp = null;
for (int i = 0; i < files.length; i++) {
if (oldPath.endsWith(File.separator)) {
temp = new File(oldPath + files[i]);
} else {
temp = new File(oldPath + File.separator + files[i]);
}
if (temp.isFile()) {
FileInputStream input = new FileInputStream(temp);
FileOutputStream output = new FileOutputStream(newPath + "/"
+ (temp.getName()).toString());
byte[] buffer = new byte[1024 * 2];
int len;
while ((len = input.read(buffer)) != -1) {
output.write(buffer, 0, len);
}
output.flush();
output.close();
input.close();
}
if (temp.isDirectory()) {// 如果是子文件夹
copyFolder(oldPath + "/" + files[i], newPath + "/" + files[i]);
}
}
}
/**
* 移动文件到指定目录
*
* @param oldPath
* 包含路径的文件名 如：E:/phsftp/src/ljq.txt
* @param newPath
* 目标文件目录 如：E:/phsftp/dest
*/
public static void moveFile(String oldPath, String newPath)
throws IOException {
copyFile(oldPath, newPath);
deleteFile(oldPath);
}
/**
* 移动文件到指定目录，不会删除文件夹
*
* @param oldPath
* 源文件目录 如：E:/phsftp/src
* @param newPath
* 目标文件目录 如：E:/phsftp/dest
*/
public static void moveFiles(String oldPath, String newPath)
throws IOException {
copyFolder(oldPath, newPath);
delAllFile(oldPath);
}
/**
* 移动文件到指定目录，会删除文件夹
*
* @param oldPath
* 源文件目录 如：E:/phsftp/src
* @param newPath
* 目标文件目录 如：E:/phsftp/dest
*/
public static void moveFolder(String oldPath, String newPath)
throws IOException {
copyFolder(oldPath, newPath);
delFolder(oldPath);
}
/**
* 解压zip文件
* 说明:本程序通过ZipOutputStream和ZipInputStream实现了zip压缩和解压功能.
* 问题:由于java.util.zip包并不支持汉字,当zip文件中有名字为中文的文件时,
* 就会出现异常:"Exception in thread "main " java.lang.IllegalArgumentException
* at java.util.zip.ZipInputStream.getUTF8String(ZipInputStream.java:285)
* @param srcDir
* 解压前存放的目录
* @param destDir
* 解压后存放的目录
* @throws Exception
*/
public static void unZip(String srcDir, String destDir)
throws IOException {
int leng = 0;
byte[] b = new byte[1024 * 2];
/** 获取zip格式的文件 **/
File[] zipFiles = new ExtensionFileFilter("zip").getFiles(srcDir);
if (zipFiles != null && !"".equals(zipFiles)) {
for (int i = 0; i < zipFiles.length; i++) {
File file = zipFiles[i];
/** 解压的输入流 * */
ZipInputStream zis = new ZipInputStream(new FileInputStream(file));
ZipEntry entry = null;
while ((entry = zis.getNextEntry()) != null) {
File destFile = null;
if (destDir.endsWith(File.separator)) {
destFile = new File(destDir + entry.getName());
} else {
destFile = new File(destDir + File.separator + entry.getName());
}
/** 把解压包中的文件拷贝到目标目录 * */
FileOutputStream fos = new FileOutputStream(destFile);
while ((leng = zis.read(b)) != -1) {
fos.write(b, 0, leng);
}
fos.close();
}
zis.close();
}
}
}
/**
* 压缩文件
* 说明:本程序通过ZipOutputStream和ZipInputStream实现了zip压缩和解压功能.
* 问题:由于java.util.zip包并不支持汉字,当zip文件中有名字为中文的文件时,
* 就会出现异常:"Exception in thread "main " java.lang.IllegalArgumentException
* at java.util.zip.ZipInputStream.getUTF8String(ZipInputStream.java:285)
* @param srcDir
* 压缩前存放的目录
* @param destDir
* 压缩后存放的目录
* @throws Exception
*/
public static void zip(String srcDir, String destDir)
throws IOException {
String tempFileName = null;
byte[] buf = new byte[1024 * 2];
int len;
// 获取要压缩的文件
File[] files = new File(srcDir).listFiles();
if (files != null) {
for (File file : files) {
if (file.isFile()) {
FileInputStream fis = new FileInputStream(file);
BufferedInputStream bis = new BufferedInputStream(fis);
if (destDir.endsWith(File.separator)) {
tempFileName = destDir + file.getName() + ".zip";
} else {
tempFileName = destDir + File.separator + file.getName() + ".zip";
}
FileOutputStream fos = new FileOutputStream(tempFileName);
BufferedOutputStream bos = new BufferedOutputStream(fos);
ZipOutputStream zos = new ZipOutputStream(bos);// 压缩包
ZipEntry ze = new ZipEntry(file.getName());// 压缩包文件名
zos.putNextEntry(ze);// 写入新的ZIP文件条目并将流定位到条目数据的开始处
while ((len = bis.read(buf)) != -1) {
zos.write(buf, 0, len);
zos.flush();
}
bis.close();
zos.close();
}
}
}
}
/**
* 读取数据
*
* @param inSream
* @param charsetName
* @return
* @throws Exception
*/
public static String readData(InputStream inSream, String charsetName)
throws IOException {
ByteArrayOutputStream outStream = new ByteArrayOutputStream();
byte[] buffer = new byte[1024];
int len = -1;
while ((len = inSream.read(buffer)) != -1) {
outStream.write(buffer, 0, len);
}
byte[] data = outStream.toByteArray();
outStream.close();
inSream.close();
return new String(data, charsetName);
}
/**
* 一行一行读取文件，适合字符读取，若读取中文字符时会出现乱码
*
* @param path
* @return
* @throws Exception
*/
public static Set
readFileLine(String path)
throws IOException {
Set datas = new HashSet();
FileReader fr = new FileReader(path);
BufferedReader br = new BufferedReader(fr);
String line = null;
while ((line = br.readLine()) != null) {
datas.add(line);
}
br.close();
fr.close();
return datas;
}
public static void main(String[] args) {
try {
unZip("c:/test", "c:/test");
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
class ExtensionFileFilter
implements FileFilter {
private String extension;
public ExtensionFileFilter(String extension) {
this.extension = extension;
}
public File[] getFiles(String srcDir) throws IOException {
return (File[]) FileUtils.listFiles(srcDir).toArray();
}
public boolean accept(File file) {
if (file.isDirectory()) {
return false;
}
String name = file.getName();
// find the last
int idx = name.lastIndexOf(".");
if (idx == -1) {
return false;
} else if (idx == name.length() - 1) {
return false;
} else {
return this.extension.equals(name.substring(idx + 1));
}
}
}