How to use zip4j to extract an zip file with password protection

java passwords unzip
wayne_bai picture wayne_bai · Jun 24, 2012 · Viewed 27.7k times · Source

I am trying to unzip a zipfile with password protection. I know there is a java library named "zip4j" that could help me. But I am failing to open the zip4j website to see the tutorial.

I had download zip4j library with another mirror but I don't know how to use it. Is there anyone that could paste example code for using zip4j unzip password protection zip file?

zip4j website

thanks so much!

Answer

developer110 picture developer110 · Jun 24, 2012

Try the following and make sure you are using the most recent Zip4j library (1.3.1):

String source = "folder/source.zip";
String destination = "folder/source/";
String password = "password";

try {
    ZipFile zipFile = new ZipFile(source);
    if (zipFile.isEncrypted()) {
        zipFile.setPassword(password);
    }
    zipFile.extractAll(destination);
} catch (ZipException e) {
    e.printStackTrace();
}

Related questions

Java 256-bit AES Password-Based Encryption

I need to implement 256 bit AES encryption, but all the examples I have found online use a "KeyGenerator" to generate a 256 bit key, but I would like to use my own passkey. How can I create my own key? I …

Read More
Why is char[] preferred over String for passwords?

In Swing, the password field has a getPassword() (returns char[]) method instead of the usual getText() (returns String) method. Similarly, I have come across a suggestion not to use String to handle passwords. Why does String pose a threat to …

Read More
How can I hash a password in Java?

I need to hash passwords for storage in a database. How can I do this in Java? I was hoping to take the plain text password, add a random salt, then store the salt and the hashed password in the …

Read More