如何申请本地DTD文件进行验证，以XML文件中的Java？ [英] How to apply validation of local DTD file to xml file in java?

问题描述

我需要解析一串传入的XML文档，但它不包含DTD声明。目前，我解析使用SAX解析器，但没有DTD验证XML文档。现在，我想申请DTD验证。 DTD是由自己创造。我如何可以验证使用由我自己（SAX解析器）创建DTD的XML文件？我发现用变压器​​，但所有的DOM解析器一些教程。

I need to parse a bunch of incoming XML documents but it does not contain DTD declaration. Currently I am parsing xml documents using SAX Parser but without DTD validation. Now I want to apply DTD validation. DTD is created by myself. How can I validate an XML file using DTD created by myself (SAX parser) ? I found some tutorials using Transformer but all for DOM Parser.

如何使用SAX解析器，也将DTD验证解析XML文件。 任何帮助......

How to parse XML file using SAX Parser and also applying DTD validation. Any help....

推荐答案

下面是一个示例，我相信可以帮到你想要的：

Below is a sample that I believe could help to do what you want:

private void loadXML(Reader reader) throws ParserConfigurationException, SAXException {
    SAXParserFactory parserFactory = SAXParserFactory.newInstance();
    parserFactory.setValidating(true);
    SAXParser parser = parserFactory.newSAXParser();
    parser.parse(new InputSource(reader), new MyHandler());
}

private static class MyHandler
        extends DefaultHandler {

    private static final String PREFS_DTD_URI = "http://www.example.com/dtd/document.dtd";

    public InputSource resolveEntity(String publicId, String systemId) throws SAXException {
        if (systemId.equals(PREFS_DTD_URI)) {
            InputSource is = new InputSource(new StringReader(PREFS_DTD));  // PREFS_DTD is a string containing actual DTD, any other Reader could be here
            is.setSystemId(PREFS_DTD_URI);
            return is;
        }
        // else use the default behaviour
        return null;
    }
}

这篇关于如何申请本地DTD文件进行验证，以XML文件中的Java？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！