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

问题描述

当我用这种方法解析我的 xml 文件(变量 f)时，我得到一个错误

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

C:Documents and SettingsjoeDesktopaicpcudevOnlineModulemap.dtd(系统找不到指定的路径)

C:Documents and SettingsjoeDesktopaicpcudevOnlineModulemap.dtd (The system cannot find the path specified)

我知道我没有 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?

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;
}

推荐答案

与 @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;
            }
        }
    });

我发现简单地返回一个空的 InputSource 也能正常工作?

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

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