com.vip.vjtools.vjkit.io

Class FileUtil

java.lang.Object

com.vip.vjtools.vjkit.io.FileUtil

public class FileUtil
extends Object

关于文件的工具集. 主要是调用JDK自带的Files工具类，少量代码调用Guava Files。 固定encoding为UTF8. 1.文件读写 2.文件及目录操作

Constructor Summary

Constructors

Constructor and Description
FileUtil()

Method Summary

Methods

Modifier and Type	Method and Description
static void	append(CharSequence data, File file) 追加String到File.
static BufferedReader	asBufferedReader(Path path)
static BufferedReader	asBufferedReader(String fileName) 获取File的BufferedReader.
static BufferedWriter	asBufferedWriter(Path path) 获取File的BufferedWriter.
static BufferedWriter	asBufferedWriter(String fileName) 获取File的BufferedWriter.
static InputStream	asInputStream(File file) 打开文件为InputStream.
static InputStream	asInputStream(Path path) 打开文件为InputStream.
static InputStream	asInputStream(String fileName) 打开文件为InputStream.
static OutputStream	asOututStream(File file) 打开文件为OutputStream.
static OutputStream	asOututStream(Path path) 打开文件为OutputStream.
static OutputStream	asOututStream(String fileName) 打开文件为OutputStream.
static void	copy(File from, File to) 复制文件或目录, not following links.
static void	copy(Path from, Path to) 复制文件或目录, not following links.
static void	copyDir(File from, File to) 复制目录
static void	copyDir(Path from, Path to) 复制目录
static void	copyFile(File from, File to) 文件复制.
static void	copyFile(Path from, Path to) 文件复制.
static Path	createTempDir() 在临时目录创建临时目录，命名为${毫秒级时间戳}-${同一毫秒内的随机数}.
static Path	createTempFile() 在临时目录创建临时文件，命名为tmp-${random.nextLong()}.tmp
static Path	createTempFile(String prefix, String suffix) 在临时目录创建临时文件，命名为${prefix}${random.nextLong()}${suffix}
static void	deleteDir(File dir) 删除目录及所有子目录/文件
static void	deleteDir(Path dir) 删除目录及所有子目录/文件
static void	deleteFile(File file) 删除文件.
static void	deleteFile(Path path) 删除文件.
static String	getFileExtension(File file) 获取文件名的扩展名部分(不包含.)
static String	getFileExtension(String fullName) 获取文件名的扩展名部分(不包含.)
static String	getFileName(String fullName) 获取文件名(不包含路径)
static boolean	isDirExists(File dir) 判断目录是否存在, from Jodd
static boolean	isDirExists(Path dirPath)
static boolean	isDirExists(String dirPath) 判断目录是否存在, from Jodd
static boolean	isFileExists(File file) 判断文件是否存在, from Jodd.
static boolean	isFileExists(Path path) 判断文件是否存在, from Jodd.
static boolean	isFileExists(String fileName) 判断文件是否存在, from Jodd.
static void	makesureDirExists(File file) 确保目录存在, 如不存在则创建
static void	makesureDirExists(Path dirPath) 确保目录存在, 如不存在则创建.
static void	makesureDirExists(String dirPath) 确保目录存在, 如不存在则创建
static void	makesureParentDirExists(File file) 确保父目录及其父目录直到根目录都已经创建.
static void	moveDir(File from, File to) 目录移动/重命名
static void	moveFile(File from, File to) 文件移动/重命名.
static void	moveFile(Path from, Path to) 文件移动/重命名.
static byte[]	toByteArray(File file) 读取文件到byte[].
static List<String>	toLines(File file) 读取文件的每行内容到List.
static String	toString(File file) 读取文件到String.
static void	touch(File file) 创建文件或更新时间戳.
static void	touch(String filePath) 创建文件或更新时间戳.
static void	write(CharSequence data, File file) 简单写入String到File.

Methods inherited from class java.lang.Object

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

Constructor Detail

FileUtil

public FileUtil()

Method Detail

toByteArray

public static byte[] toByteArray(File file)
                          throws IOException

读取文件到byte[].

Throws:

IOException

See Also:

Files#readAllBytes}

toString

public static String toString(File file)
                       throws IOException

读取文件到String.

Throws:

IOException

toLines

public static List<String> toLines(File file)
                            throws IOException

读取文件的每行内容到List.

Throws:

IOException

See Also:

Files#readAllLines}

write

public static void write(CharSequence data,
         File file)
                  throws IOException

简单写入String到File.

Throws:

IOException

append

public static void append(CharSequence data,
          File file)
                   throws IOException

追加String到File.

Throws:

IOException

asInputStream

public static InputStream asInputStream(String fileName)
                                 throws IOException

打开文件为InputStream.

Throws:

IOException

See Also:

Files#newInputStream}

asInputStream

public static InputStream asInputStream(File file)
                                 throws IOException

打开文件为InputStream.

Throws:

IOException

See Also:

Files#newInputStream}

asInputStream

public static InputStream asInputStream(Path path)
                                 throws IOException

打开文件为InputStream.

Throws:

IOException

See Also:

Files#newInputStream}

asOututStream

public static OutputStream asOututStream(String fileName)
                                  throws IOException

打开文件为OutputStream.

Throws:

IOException

See Also:

Files#newOutputStream}

asOututStream

public static OutputStream asOututStream(File file)
                                  throws IOException

打开文件为OutputStream.

Throws:

IOException

See Also:

Files#newOutputStream}

asOututStream

public static OutputStream asOututStream(Path path)
                                  throws IOException

打开文件为OutputStream.

Throws:

IOException

See Also:

Files#newOutputStream}

asBufferedReader

public static BufferedReader asBufferedReader(String fileName)
                                       throws IOException

获取File的BufferedReader.

Throws:

IOException

See Also:

Files#newBufferedReader}

asBufferedReader

public static BufferedReader asBufferedReader(Path path)
                                       throws IOException

Throws:

IOException

asBufferedWriter

public static BufferedWriter asBufferedWriter(String fileName)
                                       throws IOException

获取File的BufferedWriter.

Throws:

IOException

See Also:

Files#newBufferedWriter}

asBufferedWriter

public static BufferedWriter asBufferedWriter(Path path)
                                       throws IOException

获取File的BufferedWriter.

Throws:

IOException

See Also:

Files#newBufferedWriter}

copy

public static void copy(File from,
        File to)
                 throws IOException

复制文件或目录, not following links.

Parameters:

from - 如果为null，或者是不存在的文件或目录，抛出异常.

to - 如果为null，或者from是目录而to是已存在文件，或相反

Throws:

IOException

copy

public static void copy(Path from,
        Path to)
                 throws IOException

复制文件或目录, not following links.

Parameters:

from - 如果为null，或者是不存在的文件或目录，抛出异常.

to - 如果为null，或者from是目录而to是已存在文件，或相反

Throws:

IOException

copyFile

public static void copyFile(File from,
            File to)
                     throws IOException

文件复制.

Parameters:

from - 如果为null，或文件不存在或者是目录，，抛出异常

to - 如果to为null，或文件存在但是一个目录，抛出异常

Throws:

IOException

See Also:

Files#copy}

copyFile

public static void copyFile(Path from,
            Path to)
                     throws IOException

文件复制. @see Files.copy(java.nio.file.Path, java.nio.file.Path, java.nio.file.CopyOption...)

Parameters:

from - 如果为null，或文件不存在或者是目录，，抛出异常

to - 如果to为null，或文件存在但是一个目录，抛出异常

Throws:

IOException

copyDir

public static void copyDir(File from,
           File to)
                    throws IOException

复制目录

Throws:

IOException

copyDir

public static void copyDir(Path from,
           Path to)
                    throws IOException

复制目录

Throws:

IOException

moveFile

public static void moveFile(File from,
            File to)
                     throws IOException

文件移动/重命名.

Throws:

IOException

See Also:

Files#move}

moveFile

public static void moveFile(Path from,
            Path to)
                     throws IOException

文件移动/重命名.

Throws:

IOException

See Also:

Files#move}

moveDir

public static void moveDir(File from,
           File to)
                    throws IOException

目录移动/重命名

Throws:

IOException

touch

public static void touch(String filePath)
                  throws IOException

创建文件或更新时间戳.

Throws:

IOException

See Also:

com.google.common.io.Files#touch}

touch

public static void touch(File file)
                  throws IOException

创建文件或更新时间戳.

Throws:

IOException

See Also:

com.google.common.io.Files#touch}

deleteFile

public static void deleteFile(File file)
                       throws IOException

删除文件. 如果文件不存在或者是目录，则不做修改

Throws:

IOException

deleteFile

public static void deleteFile(Path path)
                       throws IOException

删除文件. 如果文件不存在或者是目录，则不做修改

Throws:

IOException

deleteDir

public static void deleteDir(Path dir)
                      throws IOException

删除目录及所有子目录/文件

Throws:

IOException

See Also:

Files#walkFileTree}

deleteDir

public static void deleteDir(File dir)
                      throws IOException

删除目录及所有子目录/文件

Throws:

IOException

isDirExists

public static boolean isDirExists(String dirPath)

判断目录是否存在, from Jodd

isDirExists

public static boolean isDirExists(Path dirPath)

isDirExists

public static boolean isDirExists(File dir)

判断目录是否存在, from Jodd

makesureDirExists

public static void makesureDirExists(String dirPath)
                              throws IOException

确保目录存在, 如不存在则创建

Throws:

IOException

makesureDirExists

public static void makesureDirExists(File file)
                              throws IOException

确保目录存在, 如不存在则创建

Throws:

IOException

makesureDirExists

public static void makesureDirExists(Path dirPath)
                              throws IOException

确保目录存在, 如不存在则创建.

Throws:

IOException

See Also:

Files#createDirectories}

makesureParentDirExists

public static void makesureParentDirExists(File file)
                                    throws IOException

确保父目录及其父目录直到根目录都已经创建.

Throws:

IOException

isFileExists

public static boolean isFileExists(String fileName)

判断文件是否存在, from Jodd.

See Also:

Files#exists}, Files#isRegularFile}

isFileExists

public static boolean isFileExists(File file)

判断文件是否存在, from Jodd.

See Also:

Files#exists}, Files#isRegularFile}

isFileExists

public static boolean isFileExists(Path path)

判断文件是否存在, from Jodd.

See Also:

Files#exists}, Files#isRegularFile}

createTempDir

public static Path createTempDir()
                          throws IOException

在临时目录创建临时目录，命名为${毫秒级时间戳}-${同一毫秒内的随机数}.

Throws:

IOException

See Also:

Files#createTempDirectory}

createTempFile

public static Path createTempFile()
                           throws IOException

在临时目录创建临时文件，命名为tmp-${random.nextLong()}.tmp

Throws:

IOException

See Also:

Files#createTempFile}

createTempFile

public static Path createTempFile(String prefix,
                  String suffix)
                           throws IOException

在临时目录创建临时文件，命名为${prefix}${random.nextLong()}${suffix}

Throws:

IOException

See Also:

Files#createTempFile}

getFileName

public static String getFileName(String fullName)

获取文件名(不包含路径)

getFileExtension

public static String getFileExtension(File file)

获取文件名的扩展名部分(不包含.)

See Also:

com.google.common.io.Files#getFileExtension}

getFileExtension

public static String getFileExtension(String fullName)

获取文件名的扩展名部分(不包含.)

See Also:

com.google.common.io.Files#getFileExtension}