如何使用 JAXB2.0 禁用 DTD 获取 [英] How to disable DTD fetching using JAXB2.0

问题描述

我正在尝试使用 JAXB 来解混一些我首先使用 xjc 创建的 XML.我不想对解组进行任何验证，但即使我根据 JAXB 文档使用 u.setSchema(null); 禁用了验证，但这并没有阻止 FileNotFoundException 在它尝试运行但找不到架构时被抛出.

I'm trying to use JAXB to unmashall some XML which I used xjc to create in the first place. I don't want to do any validation on the unmarshalling, but even though I have disabled the validation according to the JAXB documentation with u.setSchema(null);, but this hasn't prevented a FileNotFoundException being thrown when it tries to run and can't find the schema.

JAXBContext jc = JAXBContext.newInstance("blast");
Unmarshaller u = jc.createUnmarshaller();
u.setSchema(null);
return u.unmarshal(blast)

我看到过类似的问题，通过将 apache 属性 http://apache.org/xml/features/validation/schema 设置为 false 来禁用 SAX 解析进行验证>，但我无法让解组器使用我自己的 sax 解析器.

I've seen similar questions for disabling SAX parsing from validation by setting the apache property http://apache.org/xml/features/validation/schema to false, but I can't get the Unmarshaller to use my own sax parser.

推荐答案

以下是演示如何获取 JAXB (JSR-222) 使用 SAX 解析器的实现:

Below is sample code that demonstrates how to get a JAXB (JSR-222) implementation to use your SAX parser:

import java.io.FileReader;
import javax.xml.XMLConstants;
import javax.xml.bind.JAXBContext;
import javax.xml.bind.Unmarshaller;
import javax.xml.parsers.SAXParserFactory;
import javax.xml.transform.sax.SAXSource;

import org.xml.sax.InputSource;
import org.xml.sax.XMLReader;

public class Demo {

    public static void main(String[] args) throws Exception {
        JAXBContext jc = JAXBContext.newInstance(Foo.class);

        SAXParserFactory spf = SAXParserFactory.newInstance();
        spf.setFeature(XMLConstants.FEATURE_SECURE_PROCESSING, true);
        XMLReader xmlReader = spf.newSAXParser().getXMLReader();
        InputSource inputSource = new InputSource(new FileReader("input.xml"));
        SAXSource source = new SAXSource(xmlReader, inputSource);

        Unmarshaller unmarshaller = jc.createUnmarshaller();
        Foo foo = (Foo) unmarshaller.unmarshal(source);
        System.out.println(foo.getValue());
    }

}

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