This is an example of how to get the ZipEntry Compression method. The compression method of a ZipEntry can be either STORED for uncompressed entries, or DEFLATED for compressed (deflated) entries. Getting the compression method of the ZipEntry implies that you should:
- Create a new ZipFile to read a zip file with the given name.
- Get the Enumeration of the ZipEntry objects of the ZipFile, with
entries()API method of ZipFile and iterate through each one of them. - For each one of the ZipEntry objects get its Compression method, with
getMethod()API method of ZipEntry. The method returns either the compression method or -1 if no compression method is specified.
Let’s take a look at the code snippet that follows:
package com.javacodegeeks.snippets.core;
import java.io.IOException;
import java.util.Enumeration;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;
public class GetZipEntryCompressionMethod {
public static void main(String[] args) {
ZipFile zipFile = null;
try {
// open a zip file for reading
zipFile = new ZipFile("c:/archive.zip");
// get an enumeration of the ZIP file entries
Enumeration<? extends ZipEntry> e = zipFile.entries();
while (e.hasMoreElements()) {
ZipEntry entry = e.nextElement();
// get the compression method of the entry, or -1 if not specified
int method = entry.getMethod();
if (method == ZipEntry.DEFLATED) {
System.out.println(entry.getName() + " is Deflated");
}
else if (method == ZipEntry.STORED) {
System.out.println(entry.getName() + "is Stored");
}
else if (method == -1) {
System.out.println(entry.getName() + " is Not Specified");
}
}
}
catch (IOException ioe) {
System.out.println("Error opening zip file" + ioe);
}
finally {
try {
if (zipFile!=null) {
zipFile.close();
}
}
catch (IOException ioe) {
System.out.println("Error while closing zip file" + ioe);
}
}
}
}
This was an example of how to get the Compression method of a ZipEntry in Java.
