<dependency>
  <groupId>net.lingala.zip4j</groupId>
  <artifactId>zip4j</artifactId>
  <version>${zip4j.version}</version>
</dependency>

<dependency> <groupId>net.lingala.zip4j</groupId> <artifactId>zip4j</artifactId> <version>${zip4j.version}</version> </dependency>

File inputFile = "/var/www/html";
File compressedFile = "/opt/wwwhtml.zip";
String password="mypassword";
 
ZipParameters parameters = new ZipParameters();
 
// COMP_DEFLATE is for compression
// COMp_STORE no compression
parameters.setCompressionMethod(Zip4jConstants.COMP_DEFLATE);
 
// DEFLATE_LEVEL_ULTRA = maximum compression
// DEFLATE_LEVEL_MAXIMUM
// DEFLATE_LEVEL_NORMAL = normal compression
// DEFLATE_LEVEL_FAST
// DEFLATE_LEVEL_FASTEST = fastest compression
parameters.setCompressionLevel(Zip4jConstants.DEFLATE_LEVEL_ULTRA);
 
// set password :
if(password != null) {
  //Set the encryption flag to true
  parameters.setEncryptFiles(true);
 
  //Set the encryption method to AES Zip Encryption
  parameters.setEncryptionMethod(Zip4jConstants.ENC_METHOD_AES);
 
  //AES_STRENGTH_128 - For both encryption and decryption
  //AES_STRENGTH_192 - For decryption only
  //AES_STRENGTH_256 - For both encryption and decryption
  //Key strength 192 cannot be used for encryption. But if a zip file already has a
  //file encrypted with key strength of 192, then Zip4j can decrypt this file
  parameters.setAesKeyStrength(Zip4jConstants.AES_STRENGTH_256);
 
  //Set password
  parameters.setPassword(password);
}
 
// file compressed
zipFile.addFile(inputFile, parameters);

File inputFile = "/var/www/html"; File compressedFile = "/opt/wwwhtml.zip"; String password="mypassword"; ZipParameters parameters = new ZipParameters(); // COMP_DEFLATE is for compression // COMp_STORE no compression parameters.setCompressionMethod(Zip4jConstants.COMP_DEFLATE); // DEFLATE_LEVEL_ULTRA = maximum compression // DEFLATE_LEVEL_MAXIMUM // DEFLATE_LEVEL_NORMAL = normal compression // DEFLATE_LEVEL_FAST // DEFLATE_LEVEL_FASTEST = fastest compression parameters.setCompressionLevel(Zip4jConstants.DEFLATE_LEVEL_ULTRA); // set password : if(password != null) { //Set the encryption flag to true parameters.setEncryptFiles(true); //Set the encryption method to AES Zip Encryption parameters.setEncryptionMethod(Zip4jConstants.ENC_METHOD_AES); //AES_STRENGTH_128 - For both encryption and decryption //AES_STRENGTH_192 - For decryption only //AES_STRENGTH_256 - For both encryption and decryption //Key strength 192 cannot be used for encryption. But if a zip file already has a //file encrypted with key strength of 192, then Zip4j can decrypt this file parameters.setAesKeyStrength(Zip4jConstants.AES_STRENGTH_256); //Set password parameters.setPassword(password); } // file compressed zipFile.addFile(inputFile, parameters);

File compressedFile = "/opt/wwwhtml.zip";
String destination = "/tmp";
String password="mypassword";
 
ZipFile zipFile = new ZipFile(compressedFile);
 
// If file is encrypted, set password :
if (zipFile.isEncrypted()) {
  zipFile.setPassword(password);
}
 
// Extract zip file to destination :
zipFile.extractAll(destination);

File compressedFile = "/opt/wwwhtml.zip"; String destination = "/tmp"; String password="mypassword"; ZipFile zipFile = new ZipFile(compressedFile); // If file is encrypted, set password : if (zipFile.isEncrypted()) { zipFile.setPassword(password); } // Extract zip file to destination : zipFile.extractAll(destination);