How to Download and Use Commons IO 2.11.0 Jar
Commons IO is a library of utilities that assist with developing IO functionality in Java. It provides utility classes, stream implementations, file filters, file comparators, endian transformation classes, and much more. It can save a lot of time and effort for developers who need to work with files, streams, readers, writers, and other IO-related tasks.
Commons IO 2.11.0 jar is the latest release of the library as of July 2021. It requires a minimum of Java 8 and has several bug fixes and improvements over the previous versions. Some of the new features include:
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A new CircularBufferInputStream class that allows reading from a circular buffer.
A new PeekableInputStream class that allows peeking at the next byte or bytes in an input stream.
A new FileContentComparator class that compares the content of two files.
A new FileAgeFilter class that filters files based on their age.
A new FilePredicate interface that allows using Java 8 predicates for file filtering.
Several enhancements and optimizations for existing classes and methods.
In this article, we will show you how to download and use commons io 2.11.0 jar in your Java projects.
How to Download Commons IO 2.11.0 Jar
There are different ways to download commons io 2.11.0 jar depending on your preference and convenience. Here are some of the options:
Using a Mirror Site from Apache Commons IO
You can download commons io 2.11.0 jar directly from one of the mirror sites provided by Apache Commons IO project. You can choose a mirror site that is closest to your location for faster download speed. You can also verify the integrity of the downloaded files using signatures or checksums provided by the project.
To download commons io 2.11.0 jar from a mirror site, follow these steps:
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Go to
Select a mirror site from the list or let the site choose one for you.
Click on the link for commons-io-2.11.0-bin.zip or commons-io-2.11.0-bin.tar.gz depending on your preferred format.
Save the file to your desired location on your computer.
Extract the zip or tar file to get the commons-io-2.11.0.jar file along with other files such as javadoc, sources, tests, etc.
Using Maven Central Repository
You can also download commons io 2.11.0 jar from Maven Central Repository, which is a public repository of Java libraries and dependencies. You can use a web browser or a command-line tool such as wget or curl to download the jar file from Maven Central Repository.
To download commons io 2.11.0 jar from Maven Central Repository, follow these steps:
Go to
Click on the Download button or copy the direct link to the jar file.
Save the file to your desired location on your computer.
Using Maven Dependency
If you are using Maven as your build tool for your Java projects, you can easily add commons io 2.11.0 jar as a dependency in your pom.xml file. Maven will automatically download and manage the jar file and its transitive dependencies for you.
To add commons io 2.11.0 jar as a Maven dependency, follow these steps:
Open your pom.xml file in your project directory.
Add the following dependency element inside the element:
<dependency> <groupId>commons-io</groupId> <artifactId>commons-io</artifactId> <version>2.11.0</version> </dependency>
Save and close the pom.xml file.
Run the mvn install command to install the dependency and its transitive dependencies.
How to Use Commons IO 2.11.0 Jar in Java
Once you have downloaded and added commons io 2.11.0 jar to your Java project, you can start using it in your Java code. Commons IO provides a variety of utility classes and methods that can simplify and enhance your IO operations in Java.
In this section, we will show you some examples of how to use commons io 2.11.0 jar in Java. We will cover some of the utility classes and methods, some of the input and output classes and methods, and some of the file filters and comparators.
Importing the Library in Java Code
To use commons io 2.11.0 jar in your Java code, you need to import the relevant classes from the org.apache.commons.io package. For example, if you want to use the FileUtils class, you need to import it as follows:
import org.apache.commons.io.FileUtils;
You can also use a wildcard import to import all the classes from the package as follows:
import org.apache.commons.io.*;
However, it is generally recommended to import only the classes that you need to avoid name conflicts and improve readability.
Using Some of the Utility Classes and Methods
Commons IO provides several utility classes that contain static methods for common IO tasks. Some of these classes are:
IOUtils: This class contains methods for working with streams, readers, writers, byte arrays, char arrays, strings, etc. For example, you can use the IOUtils.copy() method to copy data from one stream to another, or use the IOUtils.toString() method to convert a stream or a reader to a string.
FileUtils: This class contains methods for working with files and directories. For example, you can use the FileUtils.copyFile() method to copy a file from one location to another, or use the FileUtils.deleteDirectory() method to delete a directory and all its contents.
FilenameUtils: This class contains methods for working with filenames and paths. For example, you can use the FilenameUtils.getExtension() method to get the extension of a filename, or use the FilenameUtils.normalize() method to normalize a path by removing redundant separators and dots.
EndianUtils: This class contains methods for working with endianess (the order of bytes in a multi-byte value). For example, you can use the EndianUtils.swapShort() method to swap the bytes of a short value, or use the EndianUtils.readSwappedLong() method to read a long value from an input stream with a different endianess than the current platform.
Example: Using FileUtils to Copy Files
The following code snippet shows how to use FileUtils.copyFile() method to copy a file from one location to another:
// Import FileUtils class import org.apache.commons.io.FileUtils; // Create File objects for source and destination files File sourceFile = new File("C:\\Users\\user\\Documents\\source.txt"); File destFile = new File("C:\\Users\\user\\Documents\\destination.txt"); // Copy source file to destination file FileUtils.copyFile(sourceFile, destFile);
Example: Using IOUtils to Convert a Stream to a String
The following code snippet shows how to use IOUtils.toString() method to convert an input stream to a string:
// Import IOUtils class import org.apache.commons.io.IOUtils; // Create an InputStream object for a file InputStream inputStream = new FileInputStream("C:\\Users\\user\\Documents\\source.txt"); // Convert the InputStream to a String using UTF-8 encoding String content = IOUtils.toString(inputStream, "UTF-8"); // Close the InputStream inputStream.close();
Using Some of the Input and Output Classes and Methods
Commons IO also provides several input and output classes that implement or extend the standard Java IO classes. Some of these classes are:
TeeInputStream and TeeOutputStream: These classes allow you to split an input or output stream into two streams, one of which can be used for further processing and the other can be used for logging or debugging.
CountingInputStream and CountingOutputStream: These classes allow you to count the number of bytes read or written by an input or output stream.
CloseShieldInputStream and CloseShieldOutputStream: These classes prevent the underlying input or output stream from being closed when the wrapper stream is closed.
ChunkedInputStream and ChunkedOutputStream: These classes handle chunked encoding for input or output streams, which is a technique for transferring data in smaller chunks with a header indicating the size of each chunk.
HexDumpInputStream and HexDumpOutputStream: These classes allow you to dump the hexadecimal representation of an input or output stream to a writer or a logger.
Example: Using TeeOutputStream to Log Data
The following code snippet shows how to use TeeOutputStream to log the data written to an output stream to a file:
// Import TeeOutputStream class import org.apache.commons.io.output.TeeOutputStream; // Create an OutputStream object for a file OutputStream outputStream = new FileOutputStream("C:\\Users\\user\\Documents\\destination.txt"); // Create a Logger object for logging Logger logger = Logger.getLogger("MyLogger"); // Create a TeeOutputStream object that wraps the original output stream and a logging output stream TeeOutputStream teeOutputStream = new TeeOutputStream(outputStream, new LoggingOutputStream(logger, Level.INFO)); // Write some data to the TeeOutputStream teeOutputStream.write("Hello world!".getBytes()); // Close the TeeOutputStream teeOutputStream.close();
Example: Using CountingInputStream to Count Bytes
The following code snippet shows how to use CountingInputStream to count the number of bytes read from an input stream:
// Import CountingInputStream class import org.apache.commons.io.input.CountingInputStream; // Create an InputStream object for a file InputStream inputStream = new FileInputStream("C:\\Users\\user\\Documents\\source.txt"); // Create a CountingInputStream object that wraps the original input stream CountingInputStream countingInputStream = new CountingInputStream(inputStream); // Read some data from the CountingInputStream byte[] buffer = new byte[1024]; int bytesRead = countingInputStream.read(buffer); // Get the number of bytes read so far long byteCount = countingInputStream.getByteCount(); // Close the CountingInputStream countingInputStream.close();
Using Some of the File Filters and Comparators
Commons IO also provides several file filters and comparators that can be used to filter or sort files based on various criteria. Some of these classes are:
NameFileFilter and PrefixFileFilter: These classes filter files based on their names or prefixes.
SizeFileFilter and AgeFileFilter: These classes filter files based on their sizes or ages.
AndFileFilter and OrFileFilter: These classes combine multiple file filters using logical AND or OR operations.
FileContentComparator and LastModifiedFileComparator: These classes compare files based on their content or last modified date.
CompositeFileComparator and ReverseFileComparator: These classes combine multiple file comparators or reverse the order of a file comparator.
Example: Using SizeFileFilter to Filter Files
The following code snippet shows how to use SizeFileFilter to filter files that are larger than 1 MB in a directory:
// Import SizeFileFilter class import org.apache.commons.io.filefilter.SizeFileFilter; // Create a File object for a directory File directory = new File("C:\\Users\\user\\Documents"); // Create a SizeFileFilter object that filters files larger than 1 MB (1024 * 1024 bytes) SizeFileFilter sizeFileFilter = new SizeFileFilter(1024 * 1024, true); // Get an array of files in the directory that match the filter File[] files = directory.listFiles(sizeFileFilter);
Example: Using FileContent Comparator to Compare Files
The following code snippet shows how to use FileContentComparator to compare the content of two files:
// Import FileContentComparator class import org.apache.commons.io.comparator.FileContentComparator; // Create File objects for two files File file1 = new File("C:\\Users\\user\\Documents\\source.txt"); File file2 = new File("C:\\Users\\user\\Documents\\destination.txt"); // Create a FileContentComparator object FileContentComparator fileContentComparator = new FileContentComparator(); // Compare the content of the two files int result = fileContentComparator.compare(file1, file2); // Interpret the result if (result == 0) System.out.println("The files have the same content."); else if (result
Conclusion
In this article, we have shown you how to download and use commons io 2.11.0 jar in your Java projects. We have covered some of the benefits and features of commons io library, some of the ways to download commons io 2.11.0 jar, and some of the examples of how to use commons io 2.11.0 jar in Java.
Commons IO is a useful and versatile library that can help you with various IO tasks in Java. It can save you time and effort by providing ready-made solutions for common problems and scenarios. It can also enhance your IO performance and functionality by offering additional features and options.
If you want to learn more about commons io library and commons io 2.11.0 jar, you can visit the following links:
: The official website of Apache Commons IO project.
: The javadoc API documentation of commons io 2.11.0 jar.
: The examples page of commons io project.
: The GitHub repository of commons io project.
: The Stack Overflow questions tagged with commons-io.
FAQs
Here are some frequently asked questions about commons io 2.11.0 jar:
What are the requirements for using commons io 2.11.0 jar?
The minimum requirement for using commons io 2.11.0 jar is Java 8 or higher. You also need to add the jar file to your classpath or as a dependency in your build tool.
How to upgrade from previous versions of commons io?
To upgrade from previous versions of commons io, you need to replace the old jar file with the new one in your classpath or dependency management tool. You also need to check the release notes and changelog for any breaking changes or deprecated features that may affect your code.
How to report bugs or request features for commons io?
To report bugs or request features for commons io, you can use the issue tracker on GitHub or Jira. You can also join the mailing list or the chat room to discuss with other users and developers.
How to contribute to commons io project?
To contribute to commons io project, you can fork the GitHub repository and submit pull requests with your code changes or improvements. You can also help with documentation, testing, translation, or other tasks.
How to get support for commons io?
To get support for commons io, you can use the mailing list or the chat room to ask questions or seek help from other users and developers. You can also browse the javadoc, the examples, and the Stack Overflow questions for more information and guidance. 44f88ac181
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