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The code snippet below shows you how to use the FileUtils.copyURLToFile(URL, File) method of the Apache Commons IO library to help you to copy the contents of a URL directly into a file. package org.kodejava.commons.io; import org.apache.commons.io.FileUtils; import java.io.File; import java.io.IOException; import java.net.URI; import java.net.URL; public class URLToFile { public static void main(String[] args) { […]
The getFreeSpaceKb(String path) method in the FileSystemUtils class can help you to calculate the free space of a drive or volume in kilobytes. Beside using commons-io solution, you can use the File.getFreeSpace() method call provided in the Java 1.6 API. You can find an example of it in the following link: How do I get […]
The code below show you how to use the Apache Commons-Lang RandomStringUtils class to generate some random string data. package org.kodejava.commons.lang; import org.apache.commons.lang3.RandomStringUtils; public class RandomStringUtilsDemo { public static void main(String[] args) { // Creates a 64-chars length random string of number. String result = RandomStringUtils.random(64, false, true); System.out.println("random = " + result); // Creates […]
The following example shows you how to read file contents into byte array. We use the IOUtils class of the Apache Commons IO library. package org.kodejava.commons.io; import org.apache.commons.io.IOUtils; import java.io.File; import java.io.FileInputStream; import java.io.IOException; import java.io.InputStream; public class FileToByteArray { public static void main(String[] args) { File file = new File("README.md"); try { InputStream is […]
We can use the code below to convert the content of an InputStream into a String. At first, we use FileInputStream create to a stream to a file that going to be read. IOUtils.toString(InputStream input, String encoding) method gets the content of the InputStream and returns a string representation of it. package org.kodejava.commons.io; import org.apache.commons.io.IOUtils; […]
This example using the Apache Commons FileUpload library to create a simple application for uploading files. The program is divided into two parts, a form using JSP and a servlet for handling the upload process. To run the sample you need to download the Commons FileUpload and Commons IO get the latest stable version. The […]
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