使DocumentBuilder.parse忽略DTD引用 [英] Make DocumentBuilder.parse ignore DTD references

问题描述

当我在此方法中解析我的xml文件（变量f）时，我收到错误

C：\Documents and Settings \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\知道我没有dtd，也不需要它。如何在忽略DTD引用错误的同时将此File对象解析为Document对象？

  private static Document getDoc（File f，String docId）抛出异常{
 DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance（）; 
 DocumentBuilder db = dbf.newDocumentBuilder（）; 
文件doc = db.parse（f）; 
 
 
返回doc; 
} 
  

解决方案

类似于建议由 @anjanb

  builder.setEntityResolver（new EntityResolver（）{
 @Override 
 public InputSource resolveEntity（String publicId，String systemId）
抛出SAXException，IOException { 
 if（systemId.contains（foo.dtd））{
返回新的InputSource（new StringReader（））; 
} else {
返回null; 
} 
} 
}）; 
  

我发现只返回一个空的InputSource也能正常工作？

When I parse my xml file (variable f) in this method, I get an error

C:\Documents and Settings\joe\Desktop\aicpcudev\OnlineModule\map.dtd (The system cannot find the path specified)

I know I do not have the dtd, nor do I need it. How can I parse this File object into a Document object while ignoring DTD reference errors?

private static Document getDoc(File f, String docId) throws Exception{
    DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
    DocumentBuilder db = dbf.newDocumentBuilder();
    Document doc = db.parse(f);


    return doc;
}

解决方案

A similar approach to the one suggested by @anjanb

    builder.setEntityResolver(new EntityResolver() {
        @Override
        public InputSource resolveEntity(String publicId, String systemId)
                throws SAXException, IOException {
            if (systemId.contains("foo.dtd")) {
                return new InputSource(new StringReader(""));
            } else {
                return null;
            }
        }
    });

I found that simply returning an empty InputSource worked just as well?

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