mobi.cangol.mobile.utils.FileUtils Maven / Gradle / Ivy
/**
* Copyright (c) 2013 Cangol
*
* Licensed under the Apache License, Version 2.0 (the "License")
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package mobi.cangol.mobile.utils;
/**
* @author Cangol
*/
import android.annotation.SuppressLint;
import android.text.TextUtils;
import android.webkit.MimeTypeMap;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.math.BigDecimal;
import java.util.ArrayList;
import java.util.List;
import mobi.cangol.mobile.logging.Log;
public class FileUtils {
public static final String TAG = "FileUtils";
public static final String UTF_8 = "UTF-8";
private FileUtils() {
}
/**
* 删除文件，可以是单个文件或文件夹
*
* @param fileName 待删除的文件名
* @return 文件删除成功返回true, 否则返回false
*/
public static boolean delete(String fileName) {
final File file = new File(fileName);
if (!file.exists()) {
Log.d(TAG, "delete File fail! " + fileName + " not exist");
return false;
} else {
if (file.isFile()) {
return deleteFile(fileName);
} else {
return deleteDirectory(fileName);
}
}
}
/**
* 删除单个文件
*
* @param fileName 被删除文件的文件名
* @return 单个文件删除成功返回true, 否则返回false
*/
public static boolean deleteFile(String fileName) {
final File file = new File(fileName);
if (file.isFile() && file.exists()) {
if (file.delete())
Log.d(TAG, "delete single file success!" + fileName);
return true;
} else {
Log.d(TAG, "delete single file fail!" + fileName);
return false;
}
}
/**
* 删除目录（文件夹）以及目录下的文件
*
* @param dir 被删除目录的文件路径
* @return 目录删除成功返回true, 否则返回false
*/
public static boolean deleteDirectory(String dir) {
// 如果dir不以文件分隔符结尾，自动添加文件分隔符
if (!dir.endsWith(File.separator)) {
dir = dir + File.separator;
}
final File dirFile = new File(dir);
// 如果dir对应的文件不存在，或者不是一个目录，则退出
if (!dirFile.exists() || !dirFile.isDirectory()) {
Log.d(TAG, "delete directory fail " + dir + " not exist");
return false;
}
boolean flag = true;
// 删除文件夹下的所有文件(包括子目录)
final File[] files = dirFile.listFiles();
for (int i = 0; i < files.length; i++) {
// 删除子文件
if (files[i].isFile()) {
flag = deleteFile(files[i].getAbsolutePath());
if (!flag) {
break;
}
}
// 删除子目录
else {
flag = deleteDirectory(files[i].getAbsolutePath());
if (!flag) {
break;
}
}
}
if (!flag) {
Log.d(TAG, "delete directory fail");
return false;
}
// 删除当前目录dirFile.delete()
if (dirFile.delete()) {
Log.d(TAG, "delete directory " + dir + " success!");
return true;
} else {
Log.d(TAG, "delete directory " + dir + " fail!");
return false;
}
}
/**
* 拷贝文件oldPath到newPath
*
* @param oldPath
* @param newPath
*/
public static void copyFile(String oldPath, String newPath) {
InputStream is = null;
FileOutputStream fos = null;
try {
int byteRead = 0;
is = new FileInputStream(oldPath); // 读入原文件
fos = new FileOutputStream(newPath);
final byte[] buffer = new byte[4094];
while ((byteRead = is.read(buffer)) != -1) {
fos.write(buffer, 0, byteRead);
}
} catch (Exception e) {
Log.d("copy file error!" + e.getMessage());
} finally {
if (is != null) {
try {
is.close();
} catch (IOException e) {
Log.e(e.getMessage());
}
}
if (fos != null) {
try {
fos.close();
} catch (IOException e) {
Log.e(e.getMessage());
}
}
}
}
/**
* 新建目录
*
* @param folderPath String 如 c:/fqf
*/
public static void newFolder(String folderPath) {
try {
final File myFilePath = new File(folderPath);
if (!myFilePath.exists()) {
myFilePath.mkdirs();
}
} catch (Exception e) {
Log.d(e.getMessage());
}
}
/**
* 新建文件
*
* @param filePath String 文件路径及名称
* @param fileContent String 文件内容
*/
public static void newFile(String filePath, String fileContent) {
OutputStreamWriter outWrite = null;
PrintWriter myFile = null;
try {
final File myFilePath = new File(filePath);
if (!myFilePath.exists()&&!myFilePath.createNewFile()) {
Log.d(TAG, "newFile createNewFile fail" + filePath);
}
outWrite = new OutputStreamWriter(new FileOutputStream(myFilePath), UTF_8);
myFile = new PrintWriter(outWrite);
myFile.println(fileContent);
} catch (Exception e) {
Log.d(e.getMessage());
} finally {
if (outWrite != null) {
try {
outWrite.close();
} catch (IOException e) {
Log.e(e.getMessage());
}
}
if (myFile != null) {
myFile.close();
}
}
}
/**
* 删除文件
*
* @param filePath String 文件路径及名称
*/
public static void delFile(String filePath) {
try {
final File file = new File(filePath);
if (file.delete()) {
Log.d(TAG, "delete file" + filePath + " success!");
}
} catch (Exception e) {
Log.d(e.getMessage());
}
}
/**
* 删除文件夹
*
* @param folderPath String 文件夹路径及名称 如c:/fqf
*/
public static void delFolder(String folderPath) {
try {
delAllFile(folderPath); // 删除完里面所有内容
final File file = new File(folderPath);
file.delete();
} catch (Exception e) {
Log.d(e.getMessage());
}
}
/**
* 删除文件夹里面的所有文件
*
* @param path String 文件夹路径 如 c:/fqf
*/
public static void delAllFile(String path) {
final File file = new File(path);
if (!file.exists()) {
return;
}
if (!file.isDirectory()) {
return;
}
final String[] tempList = file.list();
File temp = null;
for (int i = 0; i < tempList.length; i++) {
if (path.endsWith(File.separator)) {
temp = new File(path + tempList[i]);
} else {
temp = new File(path + File.separator + tempList[i]);
}
if (temp.isFile()&&!temp.delete()) {
//do nothings
}
if (temp.isDirectory()) {
delAllFile(path + "/ " + tempList[i]);// 先删除文件夹里面的文件
delFolder(path + "/ " + tempList[i]);// 再删除空文件夹
}
}
}
/**
* 复制整个文件夹内容
*
* @param oldPath String 原文件路径 如：c:/fqf
* @param newPath String 复制后路径 如：f:/fqf/ff
*/
public static void copyFolder(String oldPath, String newPath) {
FileInputStream input = null;
FileOutputStream output = null;
try {
(new File(newPath)).mkdirs(); // 如果文件夹不存在 则建立新文件夹
final File a = new File(oldPath);
final String[] file = a.list();
File temp = null;
for (int i = 0; i < file.length; i++) {
if (oldPath.endsWith(File.separator)) {
temp = new File(oldPath + file[i]);
} else {
temp = new File(oldPath + File.separator + file[i]);
}
if (temp.isFile()) {
input = new FileInputStream(temp);
output = new FileOutputStream(newPath + "/ " + (temp.getName()));
final byte[] b = new byte[1024 * 5];
int len;
while ((len = input.read(b)) != -1) {
output.write(b, 0, len);
}
output.flush();
}
if (temp.isDirectory()) {// 如果是子文件夹
copyFolder(oldPath + "/ " + file[i], newPath + "/ "
+ file[i]);
}
}
} catch (Exception e) {
Log.d(e.getMessage());
} finally {
if (input != null) {
try {
input.close();
} catch (IOException e) {
Log.e(e.getMessage());
}
}
if (output != null) {
try {
output.close();
} catch (IOException e) {
Log.e(e.getMessage());
}
}
}
}
/**
* 移动文件到指定目录
*
* @param oldPath String 如：c:/fqf.txt
* @param newPath String 如：d:/fqf.txt
*/
public static void moveFile(String oldPath, String newPath) {
copyFile(oldPath, newPath);
delFile(oldPath);
}
/**
* 移动文件到指定目录
*
* @param oldPath String 如：c:/fqf.txt
* @param newPath String 如：d:/fqf.txt
*/
public static void moveFolder(String oldPath, String newPath) {
copyFolder(oldPath, newPath);
delFolder(oldPath);
}
/**
* 按后缀遍历目录
*
* @param f
* @param fileList
* @param suffix
* @return
*/
public static List searchBySuffix(File f, List fileList,
String... suffix) {
if (null == fileList) {
fileList = new ArrayList<>();
}
if (f.isDirectory()) {
final File[] childs = f.listFiles();
if (childs != null) {
for (int i = 0; i < childs.length; i++) {
if (childs[i].isDirectory()) {
searchBySuffix(childs[i], fileList, suffix);
} else {
for (int j = 0; j < suffix.length; j++) {
if (childs[i].getName().endsWith(suffix[j])) {
fileList.add(childs[i]);
}
}
}
}
}
}
return fileList;
}
/**
* 将字符串写入文件
*
* @param file
* @param content
*/
public static void writeString(File file, String content) {
FileOutputStream os = null;
try {
os = new FileOutputStream(file);
os.write(content.getBytes(UTF_8));
os.flush();
} catch (IOException e) {
Log.d(e.getMessage());
} finally {
if (os != null) {
try {
os.close();
} catch (IOException e) {
Log.e(e.getMessage());
}
}
}
}
/**
* 将object写入文件
*
* @param obj
* @param objPath
*/
public static void writeObject(Object obj, String objPath) {
FileOutputStream fos = null;
ObjectOutputStream oos = null;
try {
fos = new FileOutputStream(new File(objPath));
oos = new ObjectOutputStream(fos);
oos.writeObject(obj);
} catch (Exception e) {
Log.d(e.getMessage());
} finally {
try {
if (oos != null) {
oos.close();
}
} catch (IOException e) {
Log.d(e.getMessage());
}
try {
if (fos != null) {
fos.close();
}
} catch (IOException e) {
Log.d(e.getMessage());
}
}
}
/**
* 从文件读取object
*
* @param file
* @return
*/
public static Object readObject(File file) {
if (!file.exists() || file.length() == 0) {
return null;
}
Object object = null;
FileInputStream fos = null;
ObjectInputStream ois = null;
try {
fos = new FileInputStream(file);
ois = new ObjectInputStream(fos);
object = ois.readObject();
} catch (Exception e) {
Log.d(e.getMessage());
} finally {
try {
if (ois != null) {
ois.close();
}
} catch (IOException e) {
Log.d(e.getMessage());
}
try {
if (fos != null) {
fos.close();
}
} catch (IOException e) {
Log.d(e.getMessage());
}
}
return object;
}
/**
* 输入流转string
*
* @param is
* @return
*/
public static String convertString(InputStream is) {
final StringBuilder sb = new StringBuilder();
String readline = "";
try {
final BufferedReader br = new BufferedReader(new InputStreamReader(is, UTF_8));
while (br.ready()) {
readline = br.readLine();
sb.append(readline);
}
br.close();
} catch (IOException ie) {
Log.d(TAG, "converts failed.");
}
return sb.toString();
}
/**
* 获取格式化的文件大小
*
* @param length
* @return
*/
public static String formatSize(long length) {
final float sizeBt = 1024L;
final float sizeKb = sizeBt * 1024.0f;
final float sizeMb = sizeKb * 1024.0f;
final float sizeGb = sizeMb * 1024.0f;
final int scale = 2;
if (length >= 0 && length < sizeBt) {
return Math.round(length * 10.0f) / 10.0 + "B";
} else if (length >= sizeBt && length < sizeKb) {
return Math.round((length / sizeBt) * 10.0f) / 10.0f + "KB";
} else if (length >= sizeKb && length < sizeMb) {
return Math.round((length / sizeKb) * 10.0f) / 10.0f + "MB";
} else if (length >= sizeMb && length < sizeGb) {
final BigDecimal longs = new BigDecimal(Double.valueOf(length + "")
.toString());
final BigDecimal sizeMB = new BigDecimal(Double.valueOf(sizeMb + "")
.toString());
final String result = longs.divide(sizeMB, scale,
BigDecimal.ROUND_HALF_UP).toString();
return result + "GB";
} else {
final BigDecimal longs = new BigDecimal(Double.valueOf(length + "")
.toString());
final BigDecimal sizeMB = new BigDecimal(Double.valueOf(sizeMb + "")
.toString());
final String result = longs.divide(sizeMB, scale,
BigDecimal.ROUND_HALF_UP).toString();
return result + "TB";
}
}
@SuppressLint("DefaultLocale")
/**
* 将格式化的文件大小转换为long
* @param sizeStr
* @return
*/
public static long formatSize(String sizeStr) {
if (sizeStr != null && !"".equals(sizeStr.trim())) {
final String unit = sizeStr
.replaceAll("([1-9]+[0-9]*|0)(\\.[\\d]+)?", "");
final String size = sizeStr.substring(0, sizeStr.indexOf(unit));
if (TextUtils.isEmpty(size)) {
return -1;
}
final float s = Float.parseFloat(size);
if ("B".equalsIgnoreCase(unit)) {
return (long) s;
} else if ("KB".equalsIgnoreCase(unit)
|| "K".equalsIgnoreCase(unit)) {
return (long) (s * 1024);
} else if ("MB".equalsIgnoreCase(unit)
|| "M".equalsIgnoreCase(unit)) {
return (long) (s * 1024 * 1024);
} else if ("GB".equalsIgnoreCase(unit)
|| "G".equalsIgnoreCase(unit)) {
return (long) (s * 1024 * 1024 * 1024);
} else if ("TB".equalsIgnoreCase(unit)
|| "T".equalsIgnoreCase(unit)) {
return (long) (s * 1024 * 1024 * 1024 * 1024);
}
}
return -1;
}
/**
* 获取文件类型或后缀
*
* @param filePath
* @return
*/
public static String getFileSuffix(String filePath) {
final String[] arrays = filePath.split("\\.");
if (arrays.length >= 2) {
return arrays[arrays.length - 1];
} else {
return "UNKNOWN";
}
}
/**
* 获取mimeType
*
* @param file
* @return
*/
public static String getMIMEType(File file) {
final String suffix = file.getName().substring(file.getName().lastIndexOf('.') + 1, file.getName().length()).toLowerCase();
return MimeTypeMap.getSingleton().getMimeTypeFromExtension(suffix);
}
/**
* 获取文件名
*
* @param filePath
* @return
*/
public static String getFileName(String filePath) {
final String fileName = new File(filePath).getName();
final String[] arrays = filePath.split("\\_");
if (arrays.length >= 2) {
return arrays[arrays.length - 1];
} else {
return fileName;
}
}
/**
* 获取文件夹中总文件大小
*
* @param file
* @return 文件大小 单位字节
*/
public static long getFolderSize(File file) {
long size = 0;
try {
final File[] fileList = file.listFiles();
for (int i = 0; i < fileList.length; i++) {
if (fileList[i].isDirectory()) {
size = size + getFolderSize(fileList[i]);
} else {
size = size + fileList[i].length();
}
}
} catch (Exception e) {
Log.d(e.getMessage());
}
return size;
}
}