Example usage for java.util.jar JarOutputStream flush

Introduction

In this page you can find the example usage for java.util.jar JarOutputStream flush.

Prototype

public void flush() throws IOException

Source Link

Document

Flushes the compressed output stream.

Usage

From source file:org.wso2.esb.integration.common.utils.common.FileManager.java

public static void copyJarFile(File sourceFile, String destinationDirectory) throws IOException {
    File destinationFileDirectory = new File(destinationDirectory);
    JarFile jarFile = new JarFile(sourceFile);
    String fileName = jarFile.getName();
    String fileNameLastPart = fileName.substring(fileName.lastIndexOf(File.separator));
    File destinationFile = new File(destinationFileDirectory, fileNameLastPart);
    JarOutputStream jarOutputStream = null;
    try {/*from   w  w  w .  j  av  a  2s  . co m*/
        jarOutputStream = new JarOutputStream(new FileOutputStream(destinationFile));
        Enumeration<JarEntry> entries = jarFile.entries();

        while (entries.hasMoreElements()) {
            JarEntry jarEntry = entries.nextElement();
            InputStream inputStream = jarFile.getInputStream(jarEntry);

            //jarOutputStream.putNextEntry(jarEntry);
            //create a new jarEntry to avoid ZipException: invalid jarEntry compressed size
            jarOutputStream.putNextEntry(new JarEntry(jarEntry.getName()));
            byte[] buffer = new byte[4096];
            int bytesRead = 0;
            while ((bytesRead = inputStream.read(buffer)) != -1) {
                jarOutputStream.write(buffer, 0, bytesRead);
            }
            inputStream.close();
            jarOutputStream.flush();
            jarOutputStream.closeEntry();
        }
    } finally {
        if (jarOutputStream != null) {
            try {
                jarOutputStream.close();
            } catch (IOException e) {

            }
        }
    }

}