这个压缩包里的都是超级经典的java例子

				
				
				
				Writing a JAR File Manifest to a File (Java Developers Almanac Example)
				
				
				
				
				
				
				
				
				
				
				
				
				
				
				
				
				
				
				
				
				
				The Java Developers Almanac 1.4
				
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				         [5 examples]
				    
				
				  e383. Writing a JAR File Manifest to a File
				
				The format of a manifest file is described in:
				
				
				    http://java.sun.com/products/jdk/1.2/docs/guide/jar/manifest.html
				
				This example retrieves the manifest from a JAR file and writes the
				manifest contents to a file.
				
				
				    try {
				        // Open the JAR file
				        JarFile jarfile = new JarFile("filename.jar");
				    
				        // Get the manifest
				        Manifest manifest = jarfile.getManifest();
				    
				        // Write the manifest to a file
				        OutputStream fos = new FileOutputStream("manifest");
				        jarfile.getManifest().write(fos);
				        fos.close();
				    } catch (IOException e) {
				    }
				
				Here's 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
				
				
				
				
				             Related Examples
				
				
				
				
				e380. 
				    Listing the Entries of a JAR File Manifest
				
				
				
				e381. 
				    Listing the Main Attributes in a JAR File Manifest
				
				
				
				e382. 
				    Creating a Manifest for a JAR File
				
				
				
				e384. 
				    Creating and Signing a JAR File Using jarsigner
				
				
				
				
				
				
				
				
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