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How to generate a manifest for a JAR file |
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This Java tip illustrates a method of generating a manifest for a JAR file. An input
stream is used for generating the manifest. Manifest may be generated from a file
and from a constructed string. An example format of a manifest may be found at the
following location:
http://java.sun.com/products/jdk/1.2/docs/guide/jar/manifest.html
try {
// Generating a manifest from a file
InputStream input = new FileInputStream("filename");
Manifest manifest = new Manifest(input);
// Generating a string version of a manifest
StringBuffer sbuf = new StringBuffer();
sbuf.append("Manifest-Version: 1.0\n");
sbuf.append("\n");
sbuf.append("Name: javax/swing/JScrollPane.class\n");
sbuf.append("Java-Bean: True\n");
// string is converted to an input stream
InputStream is = new ByteArrayInputStream(sbuf.toString().getBytes("UTF-8"));
// Generating the manifest for the input stream
manifest = new Manifest(is);
} catch (IOException e) {
}
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Here is an example of a manifest file:
Manifest-Version: 1.0
Specification-Title: Java Platform API Specification
Specification-Version: 1.4
Implementation-Title: Java Runtime Environment
Implementation-Version: 1.4.0-rc
Created-By: 1.4.0-rc (Sun Microsystems Inc.)
Implementation-Vendor: Sun Microsystems, Inc.
Specification-Vendor: Sun Microsystems, Inc.
Name: javax/swing/JScrollPane.class
Java-Bean: True
Name: javax/swing/JCheckBoxMenuItem.class
Java-Bean: True
Name: javax/swing/JTabbedPane.class
Java-Bean: True
Name: javax/swing/JMenuItem.class
Java-Bean: True
Name: javax/swing/JTable.class
Java-Bean: True
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