Per #276, Applied test case from user and removed offending item

src/main/java/com/ibatis/common/xml/NodeletParser.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2004-2024 the original author or authors.
+ * Copyright 2004-2025 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.
@@ -248,7 +248,6 @@ private Document createDocument(InputStream inputStream)
       throws ParserConfigurationException, FactoryConfigurationError, SAXException, IOException {
     DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
     factory.setFeature(XMLConstants.FEATURE_SECURE_PROCESSING, true);
-    factory.setFeature("http://apache.org/xml/features/disallow-doctype-decl", true);
     factory.setFeature("http://xml.org/sax/features/external-general-entities", false);
     factory.setFeature("http://xml.org/sax/features/external-parameter-entities", false);
     factory.setAttribute(XMLConstants.ACCESS_EXTERNAL_DTD, "");

src/test/java/com/ibatis/sqlmap/engine/builder/xml/SqlMapConfigParserTest.java

@@ -0,0 +1,54 @@
+/*
+ * Copyright 2004-2025 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.
+ * You may obtain a copy of the License at
+ *
+ *    https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.ibatis.sqlmap.engine.builder.xml;
+
+import com.ibatis.common.resources.Resources;
+
+import java.io.IOException;
+import java.io.InputStreamReader;
+
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+
+class SqlMapConfigParserTest {
+  @Test
+  void parseStream() throws IOException {
+    SqlMapConfigParser parser = new SqlMapConfigParser();
+    var stream = Resources.getResourceAsStream("com/ibatis/sqlmap/maps/SqlMapConfig.xml");
+    final var sqlMapClient = parser.parse(stream); // fails
+
+    Assertions.assertNotNull(sqlMapClient);
+  }
+
+  @Test
+  void parseStreamToReader() throws IOException {
+    SqlMapConfigParser parser = new SqlMapConfigParser();
+    var stream = Resources.getResourceAsStream("com/ibatis/sqlmap/maps/SqlMapConfig.xml");
+    var reader = new InputStreamReader(stream);
+    final var sqlMapClient = parser.parse(reader);
+
+    Assertions.assertNotNull(sqlMapClient);
+  }
+
+  @Test
+  void parseReader() throws IOException {
+    SqlMapConfigParser parser = new SqlMapConfigParser();
+    var reader = Resources.getResourceAsReader("com/ibatis/sqlmap/maps/SqlMapConfig.xml");
+    final var sqlMapClient = parser.parse(reader);
+
+    Assertions.assertNotNull(sqlMapClient);
+  }
+}