Modernize move to NIO

src/main/java/org/apache/ibatis/io/DefaultVFS.java

@@ -1,5 +1,5 @@
 /*
- *    Copyright 2009-2024 the original author or authors.
+ *    Copyright 2009-2025 the original author or authors.
  *
  *    Licensed under the Apache License, Version 2.0 (the "License");
  *    you may not use this file except in compliance with the License.
@@ -26,7 +26,9 @@
 import java.net.URLEncoder;
 import java.nio.charset.StandardCharsets;
 import java.nio.file.FileSystemException;
+import java.nio.file.Files;
 import java.nio.file.InvalidPathException;
+import java.nio.file.Path;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
@@ -78,13 +80,13 @@ public List<String> list(URL url, String path) throws IOException {
               if (log.isDebugEnabled()) {
                 log.debug("Listing " + url);
               }
-              File destinationDir = new File(path);
+              Path destinationDir = Path.of(path);
               for (JarEntry entry; (entry = jarInput.getNextJarEntry()) != null;) {
                 if (log.isDebugEnabled()) {
                   log.debug("Jar entry: " + entry.getName());
                 }
-                File entryFile = new File(destinationDir, entry.getName()).getCanonicalFile();
-                if (!entryFile.getPath().startsWith(destinationDir.getCanonicalPath())) {
+                File entryFile = destinationDir.resolve(entry.getName()).toFile().getCanonicalFile();
+                if (!entryFile.getPath().startsWith(destinationDir.toFile().getCanonicalPath())) {
                   throw new IOException("Bad zip entry: " + entry.getName());
                 }
                 children.add(entry.getName());
@@ -131,11 +133,11 @@ public List<String> list(URL url, String path) throws IOException {
             // No idea where the exception came from so rethrow it
             throw e;
           }
-          File file = new File(url.getFile());
+          File file = Path.of(url.getFile()).toFile();
           if (log.isDebugEnabled()) {
             log.debug("Listing directory " + file.getAbsolutePath());
           }
-          if (file.isDirectory()) {
+          if (Files.isDirectory(file.toPath())) {
             if (log.isDebugEnabled()) {
               log.debug("Listing " + url);
             }
@@ -273,11 +275,11 @@ protected URL findJarForResource(URL url) throws MalformedURLException {
         log.debug("Not a JAR: " + jarUrl);
       }
       jarUrl.replace(0, jarUrl.length(), testUrl.getFile());
-      File file = new File(jarUrl.toString());
+      File file = Path.of(jarUrl.toString()).toFile();
 
       // File name might be URL-encoded
       if (!file.exists()) {
-        file = new File(URLEncoder.encode(jarUrl.toString(), StandardCharsets.UTF_8));
+        file = Path.of(URLEncoder.encode(jarUrl.toString(), StandardCharsets.UTF_8)).toFile();
       }
 
       if (file.exists()) {

src/main/java/org/apache/ibatis/io/ExternalResources.java

@@ -1,5 +1,5 @@
 /*
- *    Copyright 2009-2023 the original author or authors.
+ *    Copyright 2009-2025 the original author or authors.
  *
  *    Licensed under the Apache License, Version 2.0 (the "License");
  *    you may not use this file except in compliance with the License.
@@ -16,11 +16,12 @@
 package org.apache.ibatis.io;
 
 import java.io.File;
-import java.io.FileInputStream;
 import java.io.FileNotFoundException;
-import java.io.FileOutputStream;
 import java.io.IOException;
 import java.io.InputStream;
+import java.io.OutputStream;
+import java.nio.file.Files;
+import java.nio.file.Path;
 import java.util.Properties;
 
 import org.apache.ibatis.logging.Log;
@@ -43,9 +44,9 @@ public static void copyExternalResource(File sourceFile, File destFile) throws I
       destFile.createNewFile();
     }
 
-    try (FileInputStream source = new FileInputStream(sourceFile);
-        FileOutputStream destination = new FileOutputStream(destFile)) {
-      destination.getChannel().transferFrom(source.getChannel(), 0, source.getChannel().size());
+    try (InputStream source = Files.newInputStream(sourceFile.toPath());
+        OutputStream destination = Files.newOutputStream(destFile.toPath())) {
+      source.transferTo(destination);
     }
 
   }
@@ -55,7 +56,7 @@ public static String getConfiguredTemplate(String templatePath, String templateP
     String templateName = "";
     Properties migrationProperties = new Properties();
 
-    try (InputStream is = new FileInputStream(templatePath)) {
+    try (InputStream is = Files.newInputStream(Path.of(templatePath))) {
       migrationProperties.load(is);
       templateName = migrationProperties.getProperty(templateProperty);
     } catch (FileNotFoundException e) {

src/main/java/org/apache/ibatis/io/Resources.java

@@ -1,5 +1,5 @@
 /*
- *    Copyright 2009-2023 the original author or authors.
+ *    Copyright 2009-2025 the original author or authors.
  *
  *    Licensed under the Apache License, Version 2.0 (the "License");
  *    you may not use this file except in compliance with the License.
@@ -20,9 +20,11 @@
 import java.io.InputStream;
 import java.io.InputStreamReader;
 import java.io.Reader;
+import java.net.URISyntaxException;
 import java.net.URL;
 import java.net.URLConnection;
 import java.nio.charset.Charset;
+import java.nio.file.Path;
 import java.util.Properties;
 
 /**
@@ -219,22 +221,24 @@ public static Reader getResourceAsReader(ClassLoader loader, String resource) th
   }
 
   /**
-   * Returns a resource on the classpath as a File object
+   * Returns a resource on the classpath as a File object.
    *
    * @param resource
    *          The resource to find
    *
    * @return The resource
    *
-   * @throws java.io.IOException
-   *           If the resource cannot be found or read
+   * @throws IOException
+   *           Signals that an I/O exception has occurred.
+   * @throws URISyntaxException
+   *           the URI syntax exception
    */
-  public static File getResourceAsFile(String resource) throws IOException {
-    return new File(getResourceURL(resource).getFile());
+  public static File getResourceAsFile(String resource) throws IOException, URISyntaxException {
+    return Path.of(getResourceURL(resource).toURI()).toFile();
   }
 
   /**
-   * Returns a resource on the classpath as a File object
+   * Returns a resource on the classpath as a File object.
    *
    * @param loader
    *          - the classloader used to fetch the resource
@@ -243,11 +247,13 @@ public static File getResourceAsFile(String resource) throws IOException {
    *
    * @return The resource
    *
-   * @throws java.io.IOException
-   *           If the resource cannot be found or read
+   * @throws IOException
+   *           Signals that an I/O exception has occurred.
+   * @throws URISyntaxException
+   *           the URI syntax exception
    */
-  public static File getResourceAsFile(ClassLoader loader, String resource) throws IOException {
-    return new File(getResourceURL(loader, resource).getFile());
+  public static File getResourceAsFile(ClassLoader loader, String resource) throws IOException, URISyntaxException {
+    return Path.of(getResourceURL(loader, resource).toURI()).toFile();
   }
 
   /**

src/test/java/org/apache/ibatis/io/ExternalResourcesTest.java

@@ -20,12 +20,13 @@
 import static org.junit.jupiter.api.Assertions.assertTrue;
 import static org.junit.jupiter.api.Assertions.fail;
 
+import java.io.BufferedWriter;
 import java.io.File;
-import java.io.FileNotFoundException;
-import java.io.FileWriter;
-import java.io.IOException;
 import java.nio.charset.StandardCharsets;
 import java.nio.file.Files;
+import java.nio.file.InvalidPathException;
+import java.nio.file.NoSuchFileException;
+import java.nio.file.Path;
 
 import org.junit.jupiter.api.AfterEach;
 import org.junit.jupiter.api.BeforeEach;
@@ -61,10 +62,10 @@ void testcopyExternalResource() {
   void testcopyExternalResource_fileNotFound() {
 
     try {
-      badFile = new File("/tmp/nofile.sql");
+      badFile = Path.of("/tmp/nofile.sql").toFile();
       ExternalResources.copyExternalResource(badFile, destFile);
-    } catch (IOException e) {
-      assertTrue(e instanceof FileNotFoundException);
+    } catch (Exception e) {
+      assertTrue(e instanceof NoSuchFileException);
     }
 
   }
@@ -73,10 +74,10 @@ void testcopyExternalResource_fileNotFound() {
   void testcopyExternalResource_emptyStringAsFile() {
 
     try {
-      badFile = new File(" ");
+      badFile = Path.of(" ").toFile();
       ExternalResources.copyExternalResource(badFile, destFile);
     } catch (Exception e) {
-      assertTrue(e instanceof FileNotFoundException);
+      assertTrue(e instanceof InvalidPathException || e instanceof NoSuchFileException);
     }
 
   }
@@ -85,7 +86,7 @@ void testcopyExternalResource_emptyStringAsFile() {
   void getConfiguredTemplate() {
     String templateName = "";
 
-    try (FileWriter fileWriter = new FileWriter(tempFile, StandardCharsets.UTF_8)) {
+    try (BufferedWriter fileWriter = Files.newBufferedWriter(tempFile.toPath(), StandardCharsets.UTF_8)) {
       fileWriter.append("new_command.template=templates/col_new_template_migration.sql");
       fileWriter.flush();
       templateName = ExternalResources.getConfiguredTemplate(tempFile.getAbsolutePath(), "new_command.template");