#327 Implement Closeable interface on ZipFile

src/main/java/net/lingala/zip4j/ZipFile.java

@@ -53,6 +53,7 @@
 import net.lingala.zip4j.util.RawIO;
 import net.lingala.zip4j.util.Zip4jUtil;
 
+import java.io.Closeable;
 import java.io.File;
 import java.io.IOException;
 import java.io.InputStream;
@@ -84,7 +85,7 @@
  * </ul>
  */
 
-public class ZipFile {
+public class ZipFile implements Closeable {
 
   private File zipFile;
   private ZipModel zipModel;
@@ -1076,6 +1077,7 @@ public List<File> getSplitZipFiles() throws ZipException {
    *
    * @throws IOException when the underlying input stream throws an exception when trying to close it
    */
+  @Override
   public void close() throws IOException {
     if (zipFileClosed) {
       return;

src/test/java/net/lingala/zip4j/MiscZipFileIT.java

@@ -589,6 +589,26 @@ public void testCloseSuccessfullyClosesAllInputStreams() throws IOException {
     zipFile.close();
 
     assertThat(inputStreams).hasSize(4);
+    assertInputStreamsAreClosed(inputStreams);
+  }
+
+  @Test
+  public void testCloseZipFileByTryWithResourceSuccessfullyClosesAllOpenStreams() throws IOException {
+    ZipFile zipFile = new ZipFile(generatedZipFile);
+    zipFile.addFiles(FILES_TO_ADD);
+    List<InputStream> inputStreams = new ArrayList<>();
+
+    try(ZipFile closeableZipFile = new ZipFile(generatedZipFile)) {
+      for (FileHeader fileHeader : closeableZipFile.getFileHeaders()) {
+        inputStreams.add(closeableZipFile.getInputStream(fileHeader));
+      }
+    }
+
+    assertThat(inputStreams).hasSize(3);
+    assertInputStreamsAreClosed(inputStreams);
+  }
+
+  private void assertInputStreamsAreClosed(List<InputStream> inputStreams) {
     for (InputStream inputStream : inputStreams) {
       try {
         //noinspection ResultOfMethodCallIgnored