Large streams over 2GB will return a bytes copied value of -1 after the copy has completed since the correct number of bytes cannot be returned as an int. This method uses the provided buffer, so there is no need to use a BufferedInputStream.
Note that the implementation uses skip InputStream, long. This means that the method may be considerably less efficient than using the actual skip implementation, this is done to guarantee that the correct number of characters are skipped. This method uses InputStreamReader. Large streams over 2GB will return a chars copied value of -1 after the copy has completed since the correct number of chars cannot be returned as an int.
For large streams use the copyLarge Reader, Writer method. This method uses the provided buffer, so there is no need to use a BufferedReader. Parameters: input - the Reader to read from output - the Writer to write to inputOffset - : number of chars to skip from input before copying -ve values are ignored length - : number of chars to copy.
Due to the implementation of OutputStreamWriter, this method performs a flush. This method uses OutputStreamWriter. This method buffers the input internally using BufferedInputStream if they are not already buffered.
This method buffers the input internally using BufferedReader if they are not already buffered. This implementation guarantees that it will read as many bytes as possible before giving up; this may not always be the case for skip implementations in subclasses of InputStream. Note that the implementation uses InputStream. This means that the method may be considerably less efficient than using the actual skip implementation, this is done to guarantee that the correct number of bytes are skipped.
Note that the implementation uses Reader. This allows for the possibility that InputStream. This allows for the possibility that Reader. Note that the implementation uses skip Reader, long.
This implementation guarantees that it will read as many bytes as possible before giving up; this may not always be the case for subclasses of ReadableByteChannel.
Parameters: input - the byte channel to read buffer - byte buffer destination Returns: the actual length read; may be less than requested if EOF was reached Throws: IOException - if a read error occurs Since: 2. Parameters: input - where to read input from buffer - destination Throws: IOException - if there is a problem reading the file IllegalArgumentException - if length is negative EOFException - if the number of characters read was incorrect Since: 2.
Parameters: input - where to read input from buffer - destination Throws: IOException - if there is a problem reading the file IllegalArgumentException - if length is negative EOFException - if the number of bytes read was incorrect Since: 2.
This allows for the possibility that ReadableByteChannel. Parameters: input - the byte channel to read buffer - byte buffer destination Throws: IOException - if there is a problem reading the file EOFException - if the number of bytes read was incorrect Since: 2.
All rights reserved. Object org. Returns the given reader if it is already a BufferedReader , otherwise creates a BufferedReader from the given reader. Returns the given Writer if it is already a BufferedWriter , otherwise creates a BufferedWriter from the given Writer.
Compares the contents of two Readers to determine if they are equal or not, ignoring EOL characters. Copies bytes from an InputStream to an OutputStream using an internal buffer of the given size. Copies bytes from an InputStream to chars on a Writer using the specified character encoding.
Copies chars from a Reader to bytes on an OutputStream using the specified character encoding, and calling flush. Copies chars from a large over 2GB Reader to a Writer. Returns an Iterator for the lines in an InputStream , using the character encoding specified or default encoding if null.
Gets the contents of an InputStream as a list of Strings, one entry per line, using the specified character encoding. Gets the contents of a Reader as a list of Strings, one entry per line. Fetches entire contents of an InputStream and represent same data as result InputStream.
Returns the given reader if it is a BufferedReader , otherwise creates a BufferedReader from the given reader. Gets the contents of a Reader as a byte[] using the specified character encoding. Gets the contents of an InputStream as a character array using the specified character encoding. Converts the specified CharSequence to an input stream, encoded as bytes using the specified character encoding.
If we use contentEquals on a stream or reader created from this file with the stream or reader created from sample-file. This is the inverse of toString. This converts the string to an input stream, encoded as bytes using the specified character encoding.
This method closes an OutputStream unconditionally. Then we looked at skip and skipFully methods, the contentEquals methods and few others too. Refer to the other posts on Apache Commons libraries. Takes a Reader and returns a BufferedReader. Accepts an Writer and returns a BufferedWriter. Let us look at examples for these.
It may not be printed depending on your console. Tags: apache-commons , ioutils. Leave a Reply Cancel reply Comment. Enter your name or username to comment. Enter your email address to comment. Enter your website URL optional. I appreciate it. Is that the proper way? Show 4 more comments. Bozho Bozho k gold badges silver badges bronze badges. I'm looking but I don't see a way. Thanks for the reply. Sorry I'm still new to java. Thank you I hope I can get this working to display the current downloaded bytes in the label!
Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown. The Overflow Blog. Podcast Who is building clouds for the independent developer?
Exploding turkeys and how not to thaw your frozen bird: Top turkey questions Featured on Meta. Now live: A fully responsive profile. If the directory cannot be created or does not already exist then an IOException is thrown.
Parameters: directory - directory to create, must not be null Throws: NullPointerException - if the directory is null IOException - if the directory cannot be created or the file already exists but is not a directory forceMkdirParent public static void forceMkdirParent File file throws IOException Makes any necessary but nonexistent parent directories for a given File.
If the parent directory cannot be created then an IOException is thrown. Parameters: file - file with parent to create, must not be null Throws: NullPointerException - if the file is null IOException - if the parent directory cannot be created Since: 2.
If the provided File is a regular file, then the file's length is returned. If the argument is a directory, then the size of the directory is calculated recursively. If a directory or subdirectory is security restricted, its size will not be included. Note that overflow is not detected, and the return value may be negative if overflow occurs.
Parameters: file - the regular file or directory to return the size of must not be null. Returns: the length of the file, or recursive size of the directory, provided in bytes. Parameters: directory - directory to inspect, must not be null Returns: size of directory in bytes, 0 if directory is security restricted, a negative number when the real total is greater than Long.
Parameters: directory - directory to inspect, must not be null Returns: size of directory in bytes, 0 if directory is security restricted. Throws: NullPointerException - if the directory is null Since: 2. Parameters: file - the File of which the modification date must be compared, must not be null reference - the File of which the modification date is used, must not be null Returns: true if the File exists and has been modified more recently than the reference File Throws: IllegalArgumentException - if the file is null IllegalArgumentException - if the reference file is null or doesn't exist isFileNewer public static boolean isFileNewer File file, Date date Tests if the specified File is newer than the specified Date.
Parameters: file - the File of which the modification date must be compared, must not be null date - the date reference, must not be null Returns: true if the File exists and has been modified after the given Date. Parameters: file - the File of which the modification date must be compared, must not be null timeMillis - the time reference measured in milliseconds since the epoch GMT, January 1, Returns: true if the File exists and has been modified after the given time reference.
Parameters: file - the File of which the modification date must be compared, must not be null reference - the File of which the modification date is used, must not be null Returns: true if the File exists and has been modified before the reference File Throws: IllegalArgumentException - if the file is null IllegalArgumentException - if the reference file is null or doesn't exist isFileOlder public static boolean isFileOlder File file, Date date Tests if the specified File is older than the specified Date.
Parameters: file - the File of which the modification date must be compared, must not be null date - the date reference, must not be null Returns: true if the File exists and has been modified before the given Date. Parameters: file - the File of which the modification date must be compared, must not be null timeMillis - the time reference measured in milliseconds since the epoch GMT, January 1, Returns: true if the File exists and has been modified before the given time reference.
The value of the checksum is returned. Parameters: file - the file to checksum, must not be null Returns: the checksum value Throws: NullPointerException - if the file or checksum is null IllegalArgumentException - if the file is a directory IOException - if an IO error occurs reading the file Since: 1. Multiple files may be checked using one Checksum instance if desired simply by reusing the same checksum object. When the destination directory is on another file system, do a "copy and delete".
Parameters: src - the file to be moved destDir - the destination file createDestDir - If true create the destination directory, otherwise if false throw an IOException Throws: NullPointerException - if source or destination is null FileExistsException - if the directory exists in the destination directory IOException - if source or destination is invalid IOException - if an IO error occurs moving the file Since: 1. When the destination file is on another file system, do a "copy and delete".
When the destination is on another file system, do a "copy and delete". Parameters: src - the file or directory to be moved destDir - the destination directory createDestDir - If true create the destination directory, otherwise if false throw an IOException Throws: NullPointerException - if source or destination is null FileExistsException - if the directory or file exists in the destination directory IOException - if source or destination is invalid IOException - if an IO error occurs moving the file Since: 1.
Will not return true if there is a Symbolic Link anywhere in the path, only if the specific file is. When using jdk1. All rights reserved. Object org. Facilities are provided in the following areas: writing to a file reading from a file make a directory including parent directories copying files and directories deleting files and directories converting to and from a URL listing files and directories by filter and extension comparing file content file last changed date calculating a checksum Origin of code: Excalibur, Alexandria, Commons-Utils.
Returns a human-readable version of the file size, where the input represents a specific number of bytes. Converts a Collection containing java.
Copies bytes from an InputStream source to a file destination. Copies bytes from the URL source to a file destination. Determines whether the parent directory contains the child element a file or directory.
Returns a File representing the system temporary directory. Returns a File representing the user's home directory. Tests if the specified File is newer than the specified Date. Tests if the specified File is newer than the reference File. Tests if the specified File is newer than the specified time reference. Tests if the specified File is older than the specified Date. Tests if the specified File is older than the reference File.
Tests if the specified File is older than the specified time reference. Determines whether the specified file is a Symbolic Link rather than an actual file. Allows iteration over the files in given directory and optionally its subdirectories. Allows iteration over the files in a given directory and optionally its subdirectories which match an array of extensions. Returns an Iterator for the lines in a File using the default encoding for the VM.
0コメント