Added method U.jsonFolderToXml(jsonFolder, xmlFolder, identStep)

src/main/java/com/github/underscore/U.java

@@ -34,9 +34,12 @@
 import java.nio.channels.Channels;
 import java.nio.channels.ReadableByteChannel;
 import java.nio.charset.StandardCharsets;
+import java.nio.file.FileVisitResult;
 import java.nio.file.Files;
 import java.nio.file.Path;
 import java.nio.file.Paths;
+import java.nio.file.SimpleFileVisitor;
+import java.nio.file.attribute.BasicFileAttributes;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collection;
@@ -2851,6 +2854,39 @@ public static void fileJsonToXml(String jsonFileName, String xmlFileName) throws
         fileJsonToXml(jsonFileName, xmlFileName, Xml.XmlStringBuilder.Step.TWO_SPACES);
     }
 
+    public static void jsonFolderToXml(
+            String jsonFolder, String xmlFolder, Xml.XmlStringBuilder.Step identStep)
+            throws IOException {
+        Path sourceRoot = Paths.get(jsonFolder);
+        Path targetRoot = Paths.get(xmlFolder);
+        Files.walkFileTree(sourceRoot, new SimpleFileVisitor<>() {
+            @Override
+            public FileVisitResult visitFile(Path path, BasicFileAttributes attrs) throws IOException {
+                covertJsonToXml(path, sourceRoot, targetRoot, identStep);
+                return FileVisitResult.CONTINUE;
+            }
+        });
+    }
+
+    public static void jsonFolderToXml(String jsonFolder, String xmlFolder) throws IOException {
+        jsonFolderToXml(jsonFolder, xmlFolder, Xml.XmlStringBuilder.Step.TWO_SPACES);
+    }
+
+    public static void covertJsonToXml(Path path, Path sourceRoot, Path targetRoot,
+                                       Xml.XmlStringBuilder.Step identStep) throws IOException {
+        Path relativePath = sourceRoot.relativize(path);
+        String fileName = relativePath.getFileName().toString();
+        String xmlFileName;
+        if (fileName.endsWith(".json")) {
+            xmlFileName = fileName.substring(0, fileName.length() - 5) + ".xml";
+        } else {
+            return;
+        }
+        Path targetPath = targetRoot.resolve(relativePath).getParent().resolve(xmlFileName);
+        Files.createDirectories(targetPath.getParent());
+        fileJsonToXml(path.toAbsolutePath().toString(), targetPath.toString(), identStep);
+    }
+
     public static void streamJsonToXml(
             InputStream jsonInputStream,
             OutputStream xmlOutputStream,

src/test/java/com/github/underscore/UnderscoreTest.java

@@ -1199,6 +1199,28 @@ void testMapWithoutEncodingKey(@TempDir Path tempDir) throws IOException {
                 "Should write XML using UTF-8 when #encoding key not present");
     }
 
+    @Test
+    void testJsonFolderToXml(@TempDir Path tempDir) throws IOException {
+        // Arrange
+        Path jsonFile = tempDir.resolve("in.json");
+        Path xmlFile = tempDir.resolve("in.xml");
+        String jsonText = "{}";
+        Files.write(jsonFile, jsonText.getBytes(StandardCharsets.UTF_8));
+        Files.write(xmlFile, jsonText.getBytes(StandardCharsets.UTF_8));
+        // Act
+        U.jsonFolderToXml(
+                jsonFile.getParent().toString(), xmlFile.getParent().toString());
+        // Assert
+        byte[] xmlBytes = Files.readAllBytes(xmlFile);
+        String xmlStr = new String(xmlBytes, StandardCharsets.UTF_8);
+        assertEquals(
+                "<?xml version=\"1.0\" encoding=\"UTF-8\"?>"
+                        + System.lineSeparator()
+                        + "<root></root>",
+                xmlStr,
+                "Should write XML using UTF-8 when #encoding key not present");
+    }
+
     @Test
     void testListResult(@TempDir Path tempDir) throws IOException {
         // Arrange