我试图使用 DOM Parser 解析 XML 文档。
执行 doc = builder.parse(xmlDataFile); 时出现空指针异常；
XML 数据文件中的实体很少。在删除特定实体时，我能够成功解析文件
实体是这样的
<!ENTITY SAMPLE.TIF SYSTEM "SAMPLE.TIF" NDATA TIF>
可能是什么原因？
编辑：
这是代码：
DocumentBuilderFactory aFactory = DocumentBuilderFactory.newInstance();
aFactory.setValidating(false);
aFactory.setFeature("http://xml.org/sax/features/namespaces", false);
aFactory.setFeature("http://apache.org/xml/features/validation/schema", false);
aFactory.setIgnoringComments(true);
builder = aFactory.newDocumentBuilder();
doc = builder.parse(xmlDataFile);
这是跟踪：
at com.sun.org.apache.xerces.internal.dom.DeferredDocumentImpl.setChunkIndex(DeferredDocumentImpl.java:1944)
at com.sun.org.apache.xerces.internal.dom.DeferredDocumentImpl.appendChild(DeferredDocumentImpl.java:644)
at com.sun.org.apache.xerces.internal.parsers.AbstractDOMParser.characters(AbstractDOMParser.java:1191)
at com.sun.org.apache.xerces.internal.impl.dtd.XMLDTDValidator.characters(XMLDTDValidator.java:862)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:463)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:807)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:737)
at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:107)
at com.sun.org.apache.xerces.internal.parsers.DOMParser.parse(DOMParser.java:225)
at com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderImpl.parse(DocumentBuilderImpl.java:283)
at javax.xml.parsers.DocumentBuilder.parse(DocumentBuilder.java:180)
at XMLParser.Parse(XMLParser.java:89)
at Main.main(Main.java:116)
89 行号指向 -> doc = builder.parse(xmlDataFile);