From 66fb7ea8771057499dd84413f439630894b341f8 Mon Sep 17 00:00:00 2001
From: Harry9656 <singharpal9656@gmail.com>
Date: Tue, 22 Nov 2022 08:44:18 +0100
Subject: [PATCH] JAVA-5735: Appending a new File to a ZIP file (#13044)

---
 .../java/com/baeldung/zip/ZipAppendFile.java  | 29 +++++++++++++++++++
 .../com/baeldung/zip/ZipMultipleFiles.java    |  8 +++--
 .../src/main/resources/zipTest/file3.txt      |  1 +
 3 files changed, 36 insertions(+), 2 deletions(-)
 create mode 100644 core-java-modules/core-java-io/src/main/java/com/baeldung/zip/ZipAppendFile.java
 create mode 100644 core-java-modules/core-java-io/src/main/resources/zipTest/file3.txt

diff --git a/core-java-modules/core-java-io/src/main/java/com/baeldung/zip/ZipAppendFile.java b/core-java-modules/core-java-io/src/main/java/com/baeldung/zip/ZipAppendFile.java
new file mode 100644
index 0000000000..3ac9beb542
--- /dev/null
+++ b/core-java-modules/core-java-io/src/main/java/com/baeldung/zip/ZipAppendFile.java
@@ -0,0 +1,29 @@
+package com.baeldung.zip;
+
+import java.io.*;
+import java.net.URI;
+import java.net.URL;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.*;
+import java.util.*;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+import java.util.zip.ZipEntry;
+import java.util.zip.ZipOutputStream;
+
+import static java.util.stream.Collectors.toList;
+
+public class ZipAppendFile {
+    public static void main(final String[] args) throws IOException {
+        ZipMultipleFiles.main(args);
+        String file3 = ZipAppendFile.class.getClassLoader().getResource("zipTest/file3.txt").getPath();
+        Map<String, String> env = new HashMap<>();
+        env.put("create", "true");
+        Path path = Paths.get(Paths.get(file3).getParent() + "/compressed.zip");
+        URI uri = URI.create("jar:" + path.toUri());
+        try (FileSystem fs = FileSystems.newFileSystem(uri, env)) {
+            Path nf = fs.getPath("newFile3.txt");
+            Files.write(nf, Files.readAllBytes(Paths.get(file3)), StandardOpenOption.CREATE);
+        }
+    }
+}
\ No newline at end of file
diff --git a/core-java-modules/core-java-io/src/main/java/com/baeldung/zip/ZipMultipleFiles.java b/core-java-modules/core-java-io/src/main/java/com/baeldung/zip/ZipMultipleFiles.java
index fc86147e43..cae7cd97d4 100644
--- a/core-java-modules/core-java-io/src/main/java/com/baeldung/zip/ZipMultipleFiles.java
+++ b/core-java-modules/core-java-io/src/main/java/com/baeldung/zip/ZipMultipleFiles.java
@@ -4,6 +4,7 @@ import java.io.File;
 import java.io.FileInputStream;
 import java.io.FileOutputStream;
 import java.io.IOException;
+import java.nio.file.Paths;
 import java.util.Arrays;
 import java.util.List;
 import java.util.zip.ZipEntry;
@@ -11,8 +12,11 @@ import java.util.zip.ZipOutputStream;
 
 public class ZipMultipleFiles {
     public static void main(final String[] args) throws IOException {
-        final List<String> srcFiles = Arrays.asList("src/main/resources/zipTest/test1.txt", "src/main/resources/zipTest/test2.txt");
-        final FileOutputStream fos = new FileOutputStream("src/main/resources/multiCompressed.zip");
+        String file1 = ZipAppendFile.class.getClassLoader().getResource("zipTest/test1.txt").getPath();
+        String file2 = ZipAppendFile.class.getClassLoader().getResource("zipTest/test2.txt").getPath();
+        final List<String> srcFiles = Arrays.asList(file1, file2);
+        final FileOutputStream fos =
+                new FileOutputStream(Paths.get(file1).getParent().toAbsolutePath() + "/compressed.zip");
         final ZipOutputStream zipOut = new ZipOutputStream(fos);
         for (final String srcFile : srcFiles) {
             final File fileToZip = new File(srcFile);
diff --git a/core-java-modules/core-java-io/src/main/resources/zipTest/file3.txt b/core-java-modules/core-java-io/src/main/resources/zipTest/file3.txt
new file mode 100644
index 0000000000..5328e69047
--- /dev/null
+++ b/core-java-modules/core-java-io/src/main/resources/zipTest/file3.txt
@@ -0,0 +1 @@
+Test3.txt
\ No newline at end of file