Use current time as default in ZipParameters. Issue #6

Author: srikanth-lingala

src/main/java/net/lingala/zip4j/model/ZipParameters.java

@@ -33,7 +33,7 @@ public class ZipParameters {
   private long entryCRC;
   private String defaultFolderPath;
   private String fileNameInZip;
-  private long lastModifiedFileTime;
+  private long lastModifiedFileTime = System.currentTimeMillis();
   private long entrySize = -1;
   private boolean writeExtendedLocalFileHeader = true;
 
@@ -145,6 +145,10 @@ public long getLastModifiedFileTime() {
   }
 
   public void setLastModifiedFileTime(long lastModifiedFileTime) {
+    if (lastModifiedFileTime <= 0) {
+      return;
+    }
+
     this.lastModifiedFileTime = lastModifiedFileTime;
   }
 

src/test/java/net/lingala/zip4j/io/outputstream/ZipOutputStreamIT.java

@@ -48,6 +48,12 @@ public void testZipOutputStreamDeflateWithStandardEncryption() throws IOExceptio
     testZipOutputStream(CompressionMethod.DEFLATE, true, EncryptionMethod.ZIP_STANDARD, null);
   }
 
+  @Test
+  public void testZipOutputStreamDeflateWithStandardEncryptionWhenModifiedFileTimeNotSet()
+      throws IOException, ZipException {
+    testZipOutputStream(CompressionMethod.DEFLATE, true, EncryptionMethod.ZIP_STANDARD, null, false);
+  }
+
   @Test
   public void testZipOutputStreamDeflateWithAES128() throws IOException, ZipException {
     testZipOutputStream(CompressionMethod.DEFLATE, true, EncryptionMethod.AES, AesKeyStrength.KEY_STRENGTH_128);
@@ -61,6 +67,13 @@ public void testZipOutputStreamDeflateWithAES256() throws IOException, ZipExcept
   private void testZipOutputStream(CompressionMethod compressionMethod, boolean encrypt,
                                    EncryptionMethod encryptionMethod, AesKeyStrength aesKeyStrength)
       throws IOException, ZipException {
+    testZipOutputStream(compressionMethod, encrypt, encryptionMethod, aesKeyStrength, true);
+  }
+
+  private void testZipOutputStream(CompressionMethod compressionMethod, boolean encrypt,
+                                   EncryptionMethod encryptionMethod, AesKeyStrength aesKeyStrength,
+                                   boolean setLastModifiedTime)
+      throws IOException, ZipException {
 
     ZipParameters zipParameters = buildZipParameters(compressionMethod, encrypt, encryptionMethod, aesKeyStrength);
     byte[] buff = new byte[4096];
@@ -73,7 +86,9 @@ private void testZipOutputStream(CompressionMethod compressionMethod, boolean en
           zipParameters.setEntrySize(fileToAdd.length());
         }
 
-        zipParameters.setLastModifiedFileTime(fileToAdd.lastModified());
+        if (setLastModifiedTime) {
+          zipParameters.setLastModifiedFileTime(fileToAdd.lastModified());
+        }
         zipParameters.setFileNameInZip(fileToAdd.getName());
         zos.putNextEntry(zipParameters);