FileUtil (util 0.0.3 API)

java.lang.Object
- appcoo.util.file.FileUtil

public abstract class FileUtil
extends java.lang.Object

字段概要

字段
限定符和类型字段和说明

static java.lang.String[] AUDIO_EXTENSIONS

static java.lang.String[] VIDEO_EXTENSIONS

字段
限定符和类型	字段和说明
`static java.lang.String[]`	`AUDIO_EXTENSIONS`
`static java.lang.String[]`	`VIDEO_EXTENSIONS`

方法概要

方法
限定符和类型	方法和说明
`static boolean`	`copyFile(java.lang.String sourceFilePath, java.lang.String destFilePath)` copy file
`static boolean`	`deleteFile(java.lang.String path)` delete file or directory if path is null or empty, return true if path not exist, return true if path exist, delete recursion. return true
`static java.lang.String`	`formatFileSize(long size)` 转换文件大小单位(b/kb/mb/gb) **
`static long`	`getDirectoryFileCount(java.io.File f)` 获取文件个数 **
`static long`	`getDirectorySize(java.io.File f)` 获取文件夹大小 **
`static java.lang.String`	`getFileExtension(java.io.File f)` 获取文件后缀
`static java.lang.String`	`getFileNameNoExtension(java.lang.String filename)`
`static long`	`getFileSize(java.io.File f)` 获取文件大小 **
`static java.lang.String`	`getFolderName(java.lang.String filePath)` get folder name from path 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 boolean`	`hasSDCard()`
`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`	`isVideoOrAudio(java.io.File f)` 是否是音频或者视频
`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)`
`static java.lang.StringBuilder`	`readFile(java.lang.String filePath, java.lang.String charsetName)` read file
`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
`static boolean`	`writeFile(java.lang.String filePath, java.io.InputStream stream, boolean append)` write file
`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
`static boolean`	`writeFile(java.lang.String filePath, java.util.List<java.lang.String> contentList, boolean append)` write file
`static boolean`	`writeFile(java.lang.String filePath, java.lang.String content)` write file, the string will be written to the begin of the file
`static boolean`	`writeFile(java.lang.String filePath, java.lang.String content, boolean append)` write file

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
  - VIDEO_EXTENSIONS
```
public static final java.lang.String[] VIDEO_EXTENSIONS
```
  - AUDIO_EXTENSIONS
```
public static final java.lang.String[] AUDIO_EXTENSIONS
```
- 方法详细资料
  - isVideoOrAudio
```
public static boolean isVideoOrAudio(java.io.File f)
```
    是否是音频或者视频
  - copyFile
```
public static boolean copyFile(java.lang.String sourceFilePath,
               java.lang.String destFilePath)
```
    copy file
  - 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
  - readFile
```
public static java.lang.StringBuilder readFile(java.lang.String filePath,
                               java.lang.String charsetName)
```
    read file
    
    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
    
    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
    
    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.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
  - 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
    
    参数:
    filePath -
    content -
    
    返回:
  - 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
    
    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
    
    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
    
    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
  - 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)}
  - 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.
    - 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 FileUtils#getFolderName(String) return null, return false
    
    if target directory already exists, return true
    
    return java.io.File#makeFolder
  - getFolderName
```
public static java.lang.String getFolderName(java.lang.String filePath)
```
    get folder name from path
```
      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:
  - makeFolders
```
public static boolean makeFolders(java.lang.String filePath)
```
    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:
  - getFileExtension
```
public static java.lang.String getFileExtension(java.io.File f)
```
    获取文件后缀
  - getFileNameNoExtension
```
public static java.lang.String getFileNameNoExtension(java.lang.String filename)
```
  - getFileSize
```
public static long getFileSize(java.io.File f)
                        throws java.lang.Exception
```
    获取文件大小 **
    
    抛出:
    
    java.lang.Exception
  - getDirectorySize
```
public static long getDirectorySize(java.io.File f)
                             throws java.lang.Exception
```
    获取文件夹大小 **
    
    抛出:
    
    java.lang.Exception
  - formatFileSize
```
public static java.lang.String formatFileSize(long size)
```
    转换文件大小单位(b/kb/mb/gb) **
  - getDirectoryFileCount
```
public static long getDirectoryFileCount(java.io.File f)
```
    获取文件个数 **
  - deleteFile
```
public static boolean deleteFile(java.lang.String path)
```
    delete file or directory
    - if path is null or empty, return true
    - if path not exist, return true
    - if path exist, delete recursion. return true
  - hasSDCard
```
public static boolean hasSDCard()
```

类 FileUtil

字段概要

方法概要

从类继承的方法 java.lang.Object

字段详细资料

VIDEO_EXTENSIONS

AUDIO_EXTENSIONS

方法详细资料

isVideoOrAudio

copyFile

readFileToList

readFile

writeFile

writeFile

writeFile

writeFile

writeFile

writeFile

writeFile

writeFile

makeDirs

getFolderName

makeFolders

isFileExist

isFolderExist

getFileExtension

getFileNameNoExtension

getFileSize

getDirectorySize

formatFileSize

getDirectoryFileCount

deleteFile

hasSDCard