package ren.solid.library.utils;
import android.content.Context;
import android.os.Environment;
import android.text.TextUtils;
import android.util.Log;
import java.io.BufferedReader;
import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
/**
* Created by _SOLID
* Date:2016/4/20
* Time:15:01
*/
public class FileUtils {
private static String TAG = "FileUtils";
private static String FILE_WRITING_ENCODING = "UTF-8";
private static String FILE_READING_ENCODING = "UTF-8";
public static String readFile(String _sFileName, String _sEncoding) throws Exception {
StringBuffer buffContent = null;
String sLine;
FileInputStream fis = null;
BufferedReader buffReader = null;
if (_sEncoding == null || "".equals(_sEncoding)) {
_sEncoding = FILE_READING_ENCODING;
}
try {
fis = new FileInputStream(_sFileName);
buffReader = new BufferedReader(new InputStreamReader(fis,
_sEncoding));
boolean zFirstLine = "UTF-8".equalsIgnoreCase(_sEncoding);
while ((sLine = buffReader.readLine()) != null) {
if (buffContent == null) {
buffContent = new StringBuffer();
} else {
buffContent.append("\n");
}
if (zFirstLine) {
sLine = removeBomHeaderIfExists(sLine);
zFirstLine = false;
}
buffContent.append(sLine);
}// end while
return (buffContent == null ? "" : buffContent.toString());
} catch (FileNotFoundException ex) {
throw new Exception("要读取的文件没有找到!", ex);
} catch (IOException ex) {
throw new Exception("读取文件时错误!", ex);
} finally {
// 增加异常时资源的释放
try {
if (buffReader != null)
buffReader.close();
if (fis != null)
fis.close();
} catch (Exception ex) {
ex.printStackTrace();
}
}
}
public static File writeFile(String path, String content, String encoding, boolean isOverride) throws Exception {
if (TextUtils.isEmpty(encoding)) {
encoding = FILE_WRITING_ENCODING;
}
InputStream is = new ByteArrayInputStream(content.getBytes(encoding));
return writeFile(is, path, isOverride);
}
public static File writeFile(InputStream is, String path, boolean isOverride) throws Exception {
String sPath = extractFilePath(path);
if (!pathExists(sPath)) {
makeDir(sPath, true);
}
if (!isOverride && fileExists(path)) {
if (path.contains(".")) {
String suffix = path.substring(path.lastIndexOf("."));
String pre = path.substring(0, path.lastIndexOf("."));
path = pre + "_" + System.currentTimeMillis() + suffix;
} else {
path = path + "_" + System.currentTimeMillis();
}
}
FileOutputStream os = null;
File file = null;
try {
file = new File(path);
os = new FileOutputStream(file);
int byteCount = 0;
byte[] bytes = new byte[1024];
while ((byteCount = is.read(bytes)) != -1) {
os.write(bytes, 0, byteCount);
}
os.flush();
return file;
} catch (Exception e) {
e.printStackTrace();
throw new Exception("写文件错误", e);
} finally {
try {
if (os != null)
os.close();
if (is != null)
is.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}
/**
* 移除字符串中的BOM前缀
*
* @param _sLine 需要处理的字符串
* @return 移除BOM后的字符串.
*/
private static String removeBomHeaderIfExists(String _sLine) {
if (_sLine == null) {
return null;
}
String line = _sLine;
if (line.length() > 0) {
char ch = line.charAt(0);
// 使用while是因为用一些工具看到过某些文件前几个字节都是0xfffe.
// 0xfeff,0xfffe是字节序的不同处理.JVM中,一般是0xfeff
while ((ch == 0xfeff || ch == 0xfffe)) {
line = line.substring(1);
if (line.length() == 0) {
break;
}
ch = line.charAt(0);
}
}
return line;
}
/**
* 从文件的完整路径名（路径+文件名）中提取 路径（包括：Drive+Directroy )
*
* @param _sFilePathName
* @return
*/
public static String extractFilePath(String _sFilePathName) {
int nPos = _sFilePathName.lastIndexOf('/');
if (nPos < 0) {
nPos = _sFilePathName.lastIndexOf('\\');
}
return (nPos >= 0 ? _sFilePathName.substring(0, nPos + 1) : "");
}
/**
* 检查指定文件的路径是否存在
*
* @param _sPathFileName 文件名称(含路径）
* @return 若存在，则返回true；否则，返回false
*/
public static boolean pathExists(String _sPathFileName) {
String sPath = extractFilePath(_sPathFileName);
return fileExists(sPath);
}
public static boolean fileExists(String _sPathFileName) {
File file = new File(_sPathFileName);
return file.exists();
}
/**
* 创建目录
*
* @param _sDir 目录名称
* @param _bCreateParentDir 如果父目录不存在，是否创建父目录
* @return
*/
public static boolean makeDir(String _sDir, boolean _bCreateParentDir) {
boolean zResult = false;
File file = new File(_sDir);
if (_bCreateParentDir)
zResult = file.mkdirs(); // 如果父目录不存在，则创建所有必需的父目录
else
zResult = file.mkdir(); // 如果父目录不存在，不做处理
if (!zResult)
zResult = file.exists();
return zResult;
}
public static void moveRawToDir(Context context, String rawName, String dir) {
try {
writeFile(context.getAssets().open(rawName), dir, true);
} catch (Exception e) {
e.printStackTrace();
Log.e(TAG, e.getMessage());
}
}
/**
* 得到手机的缓存目录
*
* @param context
* @return
*/
public static File getCacheDir(Context context) {
Log.i("getCacheDir", "cache sdcard state: " + Environment.getExternalStorageState());
if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
File cacheDir = context.getExternalCacheDir();
if (cacheDir != null && (cacheDir.exists() || cacheDir.mkdirs())) {
Log.i("getCacheDir", "cache dir: " + cacheDir.getAbsolutePath());
return cacheDir;
}
}
File cacheDir = context.getCacheDir();
Log.i("getCacheDir", "cache dir: " + cacheDir.getAbsolutePath());
return cacheDir;
}
/**
* 得到皮肤目录
*
* @param context
* @return
*/
public static File getSkinDir(Context context) {
File skinDir = new File(getCacheDir(context), "skin");
if (skinDir.exists()) {
skinDir.mkdirs();
}
return skinDir;
}
public static String getSkinDirPath(Context context) {
return getSkinDir(context).getAbsolutePath();
}
public static String getSaveImagePath(Context context) {
String path = getCacheDir(context).getAbsolutePath();
if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
path = Environment.getExternalStorageDirectory().getAbsolutePath()
+ File.separator + Environment.DIRECTORY_DCIM;
} else {
path = path + File.separator + "Pictures";
}
File file = new File(path);
if (!file.exists()) {
file.mkdir();
}
return path;
}
public static String generateFileNameByTime() {
return System.currentTimeMillis() + "";
}
public static String getFileName(String path) {
int index = path.lastIndexOf('/');
return path.substring(index + 1);
}
}