com.palmap.gl.utils

类 FileUtils

java.lang.Object

com.palmap.gl.utils.FileUtils

public class FileUtils
extends java.lang.Object

Used 获取SD卡根目录、读写文件、移动、复制、删除文件、获取文件名、后缀名操作类

字段概要

字段

限定符和类型	字段和说明
static java.lang.String	FILE_CHARSETNAME
static java.lang.String	FILE_EXTENSION_SEPARATOR
static java.lang.String	FILE_MAPSTYLE

构造器概要

构造器

构造器和说明
FileUtils()

方法概要

限定符和类型	方法和说明
static void	copyFile(android.content.Context context, int resId, java.io.File targetFile) 从raw中复制文件到sd卡中（如果存在，则先删除后添加）
static boolean	copyFile(java.lang.String sourceFilePath, java.lang.String destFilePath) copy file
static void	deleteAllFiles(java.io.File root) 删除所有文件
static void	deleteFile(java.lang.String filePath) 删除单个文件
static java.lang.String	getAppFilePath(android.content.Context context) 获取APP的文件路径
static java.lang.String	getContentFromRes(android.content.Context context, int id) 获取res目录中文件的内容
static java.lang.String	getExternalCacheDir(android.content.Context paramContext) 获取SD卡缓存目录
static java.lang.String	getFileExtension(java.lang.String filePath) get suffix of file from path getFileExtension(null) = "" getFileExtension("") = "" getFileExtension(" ") = " " getFileExtension("a.mp3") = "mp3" getFileExtension("a.b.rmvb") = "rmvb" getFileExtension("abc") = "" getFileExtension("c:\\") = "" getFileExtension("c:\\a") = "" getFileExtension("c:\\a.b") = "b" getFileExtension("c:a.txt\\a") = "" getFileExtension("/home/admin") = "" getFileExtension("/home/admin/a.txt/b") = "" getFileExtension("/home/admin/a.txt/b.mp3") = "mp3"
static java.lang.String	getFileName(java.lang.String filePath) get file name from path, include suffix【获得文件路径中的文件目录字符串】 getFileName(null) = null getFileName("") = "" getFileName(" ") = " " getFileName("a.mp3") = "a.mp3" getFileName("a.b.rmvb") = "a.b.rmvb" getFileName("abc") = "abc" getFileName("c:\\") = "" getFileName("c:\\a") = "a" getFileName("c:\\a.b") = "a.b" getFileName("c:a.txt\\a") = "a" getFileName("/home/admin") = "admin" getFileName("/home/admin/a.txt/b.mp3") = "b.mp3"
static java.lang.String	getFileNameWithoutExtension(java.lang.String filePath) get file name from path, not include suffix getFileNameWithoutExtension(null) = null getFileNameWithoutExtension("") = "" getFileNameWithoutExtension(" ") = " " getFileNameWithoutExtension("abc") = "abc" getFileNameWithoutExtension("a.mp3") = "a" getFileNameWithoutExtension("a.b.rmvb") = "a.b" getFileNameWithoutExtension("c:\\") = "" getFileNameWithoutExtension("c:\\a") = "a" getFileNameWithoutExtension("c:\\a.b") = "a" getFileNameWithoutExtension("c:a.txt\\a") = "a" getFileNameWithoutExtension("/home/admin") = "admin" getFileNameWithoutExtension("/home/admin/a.txt/b.mp3") = "b"
static long	getFileSize(java.lang.String path) get file size if path is null or empty, return -1 if path exist and it is a file, return file size, else return -1
static java.lang.String	getFolderName(java.lang.String filePath) get folder name from path【获得文件路径中的父文件夹目录字符串】 getFolderName(null) = null getFolderName("") = "" getFolderName(" ") = "" getFolderName("a.mp3") = "" getFolderName("a.b.rmvb") = "" getFolderName("abc") = "" getFolderName("c:\\") = "c:" getFolderName("c:\\a") = "c:" getFolderName("c:\\a.b") = "c:" getFolderName("c:a.txt\\a") = "c:a.txt" getFolderName("c:a\\b\\c\\d.txt") = "c:a\\b\\c" getFolderName("/home/admin") = "/home" getFolderName("/home/admin/a.txt/b.mp3") = "/home/admin/a.txt"
static java.lang.String	getMapDataPath()
static java.lang.String	getMapStyleFilePath(java.lang.String mapStyleId)
static java.lang.String	getPkgName(android.content.Context context) 获取程序的包名
static java.lang.String	getSDPath() 获取SD卡路径
static boolean	isFileExist(java.lang.String filePath) Indicates if this file represents a file on the underlying file system.
static boolean	isFolderExist(java.lang.String directoryPath) Indicates if this file represents a directory on the underlying file system.
static boolean	makeDirs(java.lang.String filePath) Creates the directory named by the trailing filename of this file, including the complete directory path required to create this directory.
static boolean	makeFolders(java.lang.String filePath) 【创建父目录文件夹】
static void	moveFile(java.io.File srcFile, java.io.File destFile) move file
static void	moveFile(java.lang.String sourceFilePath, java.lang.String destFilePath) move file
static java.lang.String	readFile(java.lang.String filePath) 读取文件内容赋值给字符串【固定字符集为utf-8】
static java.lang.StringBuilder	readFile(java.lang.String filePath, java.lang.String charsetName) read file【读取文件内容】
static java.util.List<java.lang.String>	readFileToList(java.lang.String filePath, java.lang.String charsetName) read file to string list, a element of list is a line
static boolean	writeFile(java.io.File file, java.io.InputStream stream) write file, the bytes will be written to the begin of the file
static boolean	writeFile(java.io.File file, java.io.InputStream stream, boolean append) write file
static boolean	writeFile(java.lang.String filePath, java.io.InputStream stream) write file, the bytes will be written to the begin of the file【写入文件：输入流 且 重新写入】
static boolean	writeFile(java.lang.String filePath, java.io.InputStream stream, boolean append) write file【写入文件 输入流】
static boolean	writeFile(java.lang.String filePath, java.util.List<java.lang.String> contentList) write file, the string list will be written to the begin of the file【写入文件：字符串集合 且 重新写入】
static boolean	writeFile(java.lang.String filePath, java.util.List<java.lang.String> contentList, boolean append) write file【写入文件：字符串集合】
static boolean	writeFile(java.lang.String filePath, java.lang.String content) write file, the string will be written to the begin of the file【写入文件：字符串 且重新写入】
static boolean	writeFile(java.lang.String filePath, java.lang.String content, boolean append) write file【写文件：字符串】
static boolean	writeFile2SD(java.lang.String content, java.lang.String tagePath)
static boolean	writeMapStyleFile(java.lang.String mapStyleId, java.lang.String content)

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

字段详细资料

FILE_EXTENSION_SEPARATOR

public static final java.lang.String FILE_EXTENSION_SEPARATOR

另请参阅:

常量字段值

FILE_CHARSETNAME

public static final java.lang.String FILE_CHARSETNAME

另请参阅:

常量字段值

FILE_MAPSTYLE

public static final java.lang.String FILE_MAPSTYLE

另请参阅:

常量字段值

构造器详细资料

FileUtils

public FileUtils()

方法详细资料

getSDPath

public static java.lang.String getSDPath()

获取SD卡路径

返回:

readFile

public static java.lang.StringBuilder readFile(java.lang.String filePath,
                                               java.lang.String charsetName)

read file【读取文件内容】

参数:

filePath：文件路径 -

charsetName：The - name of a supported charset指定编码集

返回:

if file not exist, return null, else return content of file

抛出:

java.lang.RuntimeException - if an error occurs while operator BufferedReader

readFile

public static java.lang.String readFile(java.lang.String filePath)

读取文件内容赋值给字符串【固定字符集为utf-8】

readFileToList

public static java.util.List<java.lang.String> readFileToList(java.lang.String filePath,
                                                              java.lang.String charsetName)

read file to string list, a element of list is a line

参数:

filePath -

charsetName - The name of a supported charset

返回:

if file not exist, return null, else return content of file

抛出:

java.lang.RuntimeException - if an error occurs while operator BufferedReader

writeFile

public static boolean writeFile(java.lang.String filePath,
                                java.lang.String content,
                                boolean append)

write file【写文件：字符串】

参数:

filePath -

content -

append - is append, if true, write to the end of file, else clear content of file and write into it

返回:

return false if content is empty, true otherwise

抛出:

java.lang.RuntimeException - if an error occurs while operator FileWriter

writeFile

public static boolean writeFile(java.lang.String filePath,
                                java.util.List<java.lang.String> contentList,
                                boolean append)

write file【写入文件：字符串集合】

参数:

filePath -

contentList -

append - is append, if true, write to the end of file, else clear content of file and write into it

返回:

return false if contentList is empty, true otherwise

抛出:

java.lang.RuntimeException - if an error occurs while operator FileWriter

writeFile

public static boolean writeFile(java.lang.String filePath,
                                java.lang.String content)

write file, the string will be written to the begin of the file【写入文件：字符串 且重新写入】

参数:

filePath -

content -

返回:

getMapStyleFilePath

public static java.lang.String getMapStyleFilePath(java.lang.String mapStyleId)

writeMapStyleFile

public static boolean writeMapStyleFile(java.lang.String mapStyleId,
                                        java.lang.String content)

writeFile

public static boolean writeFile(java.lang.String filePath,
                                java.util.List<java.lang.String> contentList)

write file, the string list will be written to the begin of the file【写入文件：字符串集合 且 重新写入】

参数:

filePath -

contentList -

返回:

writeFile

public static boolean writeFile(java.lang.String filePath,
                                java.io.InputStream stream)

write file, the bytes will be written to the begin of the file【写入文件：输入流 且 重新写入】

参数:

filePath -

stream -

返回:

另请参阅:

#writeFile(String, InputStream, boolean)}

writeFile

public static boolean writeFile(java.lang.String filePath,
                                java.io.InputStream stream,
                                boolean append)

write file【写入文件 输入流】

参数:

filePath - the file to be opened for writing.

stream - the input stream

append - if true, then bytes will be written to the end of the file rather than the beginning

返回:

return true

抛出:

java.lang.RuntimeException - if an error occurs while operator FileOutputStream

writeFile

public static boolean writeFile(java.io.File file,
                                java.io.InputStream stream)

write file, the bytes will be written to the begin of the file

参数:

file -

stream -

返回:

另请参阅:

#writeFile(File, InputStream, boolean)}

writeFile

public static boolean writeFile(java.io.File file,
                                java.io.InputStream stream,
                                boolean append)

write file

参数:

file - the file to be opened for writing.

stream - the input stream

append - if true, then bytes will be written to the end of the file rather than the beginning

返回:

return true

抛出:

java.lang.RuntimeException - if an error occurs while operator FileOutputStream

moveFile

public static void moveFile(java.lang.String sourceFilePath,
                            java.lang.String destFilePath)

move file

参数:

sourceFilePath -

destFilePath -

moveFile

public static void moveFile(java.io.File srcFile,
                            java.io.File destFile)

move file

参数:

srcFile -

destFile -

copyFile

public static boolean copyFile(java.lang.String sourceFilePath,
                               java.lang.String destFilePath)

copy file

参数:

sourceFilePath -

destFilePath -

返回:

抛出:

java.lang.RuntimeException - if an error occurs while operator FileOutputStream

copyFile

public static void copyFile(android.content.Context context,
                            int resId,
                            java.io.File targetFile)
                     throws java.io.IOException

从raw中复制文件到sd卡中（如果存在，则先删除后添加）

抛出:

java.io.IOException

getFileNameWithoutExtension

public static java.lang.String getFileNameWithoutExtension(java.lang.String filePath)

get file name from path, not include suffix

      getFileNameWithoutExtension(null)               =   null
      getFileNameWithoutExtension("")                 =   ""
      getFileNameWithoutExtension("   ")              =   "   "
      getFileNameWithoutExtension("abc")              =   "abc"
      getFileNameWithoutExtension("a.mp3")            =   "a"
      getFileNameWithoutExtension("a.b.rmvb")         =   "a.b"
      getFileNameWithoutExtension("c:\\")              =   ""
      getFileNameWithoutExtension("c:\\a")             =   "a"
      getFileNameWithoutExtension("c:\\a.b")           =   "a"
      getFileNameWithoutExtension("c:a.txt\\a")        =   "a"
      getFileNameWithoutExtension("/home/admin")      =   "admin"
      getFileNameWithoutExtension("/home/admin/a.txt/b.mp3")  =   "b"
 

参数:

filePath -

返回:

file name from path, not include suffix

getFileName

public static java.lang.String getFileName(java.lang.String filePath)

get file name from path, include suffix【获得文件路径中的文件目录字符串】

      getFileName(null)               =   null
      getFileName("")                 =   ""
      getFileName("   ")              =   "   "
      getFileName("a.mp3")            =   "a.mp3"
      getFileName("a.b.rmvb")         =   "a.b.rmvb"
      getFileName("abc")              =   "abc"
      getFileName("c:\\")              =   ""
      getFileName("c:\\a")             =   "a"
      getFileName("c:\\a.b")           =   "a.b"
      getFileName("c:a.txt\\a")        =   "a"
      getFileName("/home/admin")      =   "admin"
      getFileName("/home/admin/a.txt/b.mp3")  =   "b.mp3"
 

参数:

filePath -

返回:

file name from path, include suffix

getFolderName

public static java.lang.String getFolderName(java.lang.String filePath)

get folder name from path【获得文件路径中的父文件夹目录字符串】

      getFolderName(null)               =   null
      getFolderName("")                 =   ""
      getFolderName("   ")              =   ""
      getFolderName("a.mp3")            =   ""
      getFolderName("a.b.rmvb")         =   ""
      getFolderName("abc")              =   ""
      getFolderName("c:\\")              =   "c:"
      getFolderName("c:\\a")             =   "c:"
      getFolderName("c:\\a.b")           =   "c:"
      getFolderName("c:a.txt\\a")        =   "c:a.txt"
      getFolderName("c:a\\b\\c\\d.txt")    =   "c:a\\b\\c"
      getFolderName("/home/admin")      =   "/home"
      getFolderName("/home/admin/a.txt/b.mp3")  =   "/home/admin/a.txt"
 

参数:

filePath -

返回:

getFileExtension

public static java.lang.String getFileExtension(java.lang.String filePath)

get suffix of file from path

      getFileExtension(null)               =   ""
      getFileExtension("")                 =   ""
      getFileExtension("   ")              =   "   "
      getFileExtension("a.mp3")            =   "mp3"
      getFileExtension("a.b.rmvb")         =   "rmvb"
      getFileExtension("abc")              =   ""
      getFileExtension("c:\\")              =   ""
      getFileExtension("c:\\a")             =   ""
      getFileExtension("c:\\a.b")           =   "b"
      getFileExtension("c:a.txt\\a")        =   ""
      getFileExtension("/home/admin")      =   ""
      getFileExtension("/home/admin/a.txt/b")  =   ""
      getFileExtension("/home/admin/a.txt/b.mp3")  =   "mp3"
 

参数:

filePath -

返回:

makeDirs

public static boolean makeDirs(java.lang.String filePath)

Creates the directory named by the trailing filename of this file, including the complete directory path required to create this directory.
【创建目录】

Attentions:
• makeDirs("C:\\Users\\Trinea") can only create users folder
• makeFolder("C:\\Users\\Trinea\\") can create Trinea folder

参数:

filePath -

返回:

true if the necessary directories have been created or the target directory already exists, false one of the directories can not be created.

• if getFolderName(String) return null, return false
• if target directory already exists, return true
• return makeFolder

makeFolders

public static boolean makeFolders(java.lang.String filePath)

【创建父目录文件夹】

参数:

filePath -

返回:

另请参阅:

makeDirs(String)

isFileExist

public static boolean isFileExist(java.lang.String filePath)

Indicates if this file represents a file on the underlying file system.

参数:

filePath -

返回:

isFolderExist

public static boolean isFolderExist(java.lang.String directoryPath)

Indicates if this file represents a directory on the underlying file system.

参数:

directoryPath -

返回:

deleteAllFiles

public static void deleteAllFiles(java.io.File root)

删除所有文件

deleteFile

public static void deleteFile(java.lang.String filePath)

删除单个文件

getFileSize

public static long getFileSize(java.lang.String path)

get file size

• if path is null or empty, return -1
• if path exist and it is a file, return file size, else return -1

参数:

path -

返回:

returns the length of this file in bytes. returns -1 if the file does not exist.

getAppFilePath

public static java.lang.String getAppFilePath(android.content.Context context)

获取APP的文件路径

getExternalCacheDir

public static java.lang.String getExternalCacheDir(android.content.Context paramContext)

获取SD卡缓存目录

getPkgName

public static java.lang.String getPkgName(android.content.Context context)

获取程序的包名

getContentFromRes

public static java.lang.String getContentFromRes(android.content.Context context,
                                                 int id)
                                          throws java.io.IOException

获取res目录中文件的内容

抛出:

java.io.IOException

getMapDataPath

public static java.lang.String getMapDataPath()

writeFile2SD

public static boolean writeFile2SD(java.lang.String content,
                                   java.lang.String tagePath)