37

我正在尝试针对许多不同的模式验证 XML 文件(为人为的示例道歉):

  • a.xsd
  • b.xsd
  • c.xsd

c.xsd 特别是导入 b.xsd 和 b.xsd 导入 a.xsd,使用:

<xs:include schemaLocation="b.xsd"/>

我正在尝试通过 Xerces 以下列方式执行此操作:

XMLSchemaFactory xmlSchemaFactory = new XMLSchemaFactory();
Schema schema = xmlSchemaFactory.newSchema(new StreamSource[] { new StreamSource(this.getClass().getResourceAsStream("a.xsd"), "a.xsd"),
                                                         new StreamSource(this.getClass().getResourceAsStream("b.xsd"), "b.xsd"),
                                                         new StreamSource(this.getClass().getResourceAsStream("c.xsd"), "c.xsd")});     
Validator validator = schema.newValidator();
validator.validate(new StreamSource(new StringReader(xmlContent)));

但这无法正确导入所有三个模式,导致无法将名称“blah”解析为(n)“组”组件。

我已经使用Python成功验证了这一点,但在Java 6.0Xerces 2.8.1方面存在实际问题。任何人都可以建议这里出了什么问题,或者更简单的方法来验证我的 XML 文档吗?

4

8 回答 8

18

因此,以防万一其他人在这里遇到同样的问题,我需要从单元测试中加载父模式(和隐式子模式) - 作为资源 - 以验证 XML 字符串。我使用 Xerces XMLSchemFactory 和 Java 6 验证器来执行此操作。

为了通过包含正确加载子架构,我必须编写一个自定义资源解析器。代码可以在这里找到:

https://code.google.com/p/xmlsanity/source/browse/src/com/arc90/xmlsanity/validation/ResourceResolver.java

要使用解析器,请在模式工厂中指定它:

xmlSchemaFactory.setResourceResolver(new ResourceResolver());

它将使用它通过类路径解析您的资源(在我的情况下来自 src/main/resources)。欢迎对此提出任何意见...

于 2009-07-09T19:03:52.410 回答
7

http://www.kdgregory.com/index.php?page=xml.parsing 部分“单个文档的多个模式

我基于该文档的解决方案:

URL xsdUrlA = this.getClass().getResource("a.xsd");
URL xsdUrlB = this.getClass().getResource("b.xsd");
URL xsdUrlC = this.getClass().getResource("c.xsd");

SchemaFactory schemaFactory = schemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI);
//---
String W3C_XSD_TOP_ELEMENT =
"<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"yes\"?>\n"
   + "<xs:schema xmlns:xs=\"http://www.w3.org/2001/XMLSchema\" elementFormDefault=\"qualified\">\n"
   + "<xs:include schemaLocation=\"" +xsdUrlA.getPath() +"\"/>\n"
   + "<xs:include schemaLocation=\"" +xsdUrlB.getPath() +"\"/>\n"
   + "<xs:include schemaLocation=\"" +xsdUrlC.getPath() +"\"/>\n"
   +"</xs:schema>";
Schema schema = schemaFactory.newSchema(new StreamSource(new StringReader(W3C_XSD_TOP_ELEMENT), "xsdTop"));
于 2010-09-20T11:35:40.383 回答
2

来自 xerces 文档:http: //xerces.apache.org/xerces2-j/faq-xs.html

import javax.xml.transform.Source;
import javax.xml.transform.stream.StreamSource;
import javax.xml.validation.Schema;
import javax.xml.validation.SchemaFactory;
import javax.xml.validation.Validator;

...

StreamSource[] schemaDocuments = /* created by your application */;
Source instanceDocument = /* created by your application */;

SchemaFactory sf = SchemaFactory.newInstance(
    "http://www.w3.org/XML/XMLSchema/v1.1");
Schema s = sf.newSchema(schemaDocuments);
Validator v = s.newValidator();
v.validate(instanceDocument);
于 2012-03-28T08:31:06.137 回答
2

Xerces 中的模式内容 (a) 非常非常迂腐,并且 (b) 当它不喜欢它找到的内容时,它会给出完全无用的错误消息。这是一个令人沮丧的组合。

python 中的模式内容可能更加宽容,并且允许模式中的小错误过去未报告。

现在,如您所说,如果 c.xsd 包含 b.xsd,而 b.xsd 包含 a.xsd,则无需将所有三个加载到模式工厂中。它不仅没有必要,而且可能会混淆 Xerces 并导致错误,所以这可能是您的问题。只需将 c.xsd 传递给工厂,让它自己解析 b.xsd 和 a.xsd,它应该相对于 c.xsd 执行此操作。

于 2009-07-07T21:27:41.670 回答
2

我遇到了同样的问题,经过调查发现了这个解决方案。这个对我有用。

Enum设置不同的XSDs

public enum XsdFile {
    // @formatter:off
    A("a.xsd"),
    B("b.xsd"),
    C("c.xsd");
    // @formatter:on

    private final String value;

    private XsdFile(String value) {
        this.value = value;
    }

    public String getValue() {
        return this.value;
    }
}

验证方法:

public static void validateXmlAgainstManyXsds() {
    final SchemaFactory schemaFactory = SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI);

    String xmlFile;
    xmlFile = "example.xml";

    // Use of Enum class in order to get the different XSDs
    Source[] sources = new Source[XsdFile.class.getEnumConstants().length];
    for (XsdFile xsdFile : XsdFile.class.getEnumConstants()) {
        sources[xsdFile.ordinal()] = new StreamSource(xsdFile.getValue());
    }

    try {
        final Schema schema = schemaFactory.newSchema(sources);
        final Validator validator = schema.newValidator();
        System.out.println("Validating " + xmlFile + " against XSDs " + Arrays.toString(sources));
        validator.validate(new StreamSource(new File(xmlFile)));
    } catch (Exception exception) {
        System.out.println("ERROR: Unable to validate " + xmlFile + " against XSDs " + Arrays.toString(sources)
                + " - " + exception);
    }
    System.out.println("Validation process completed.");
}
于 2015-11-02T12:19:27.433 回答
1

我最终使用了这个:

import org.apache.xerces.parsers.SAXParser;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;
import org.xml.sax.helpers.DefaultHandler;
import java.io.IOException;
 .
 .
 .
 try {
        SAXParser parser = new SAXParser();
        parser.setFeature("http://xml.org/sax/features/validation", true);
        parser.setFeature("http://apache.org/xml/features/validation/schema", true);
        parser.setFeature("http://apache.org/xml/features/validation/schema-full-checking", true);
        parser.setProperty("http://apache.org/xml/properties/schema/external-noNamespaceSchemaLocation", "http://your_url_schema_location");

        Validator handler = new Validator();
        parser.setErrorHandler(handler);
        parser.parse("file:///" + "/home/user/myfile.xml");

 } catch (SAXException e) {
    e.printStackTrace();
 } catch (IOException ex) {
    e.printStackTrace();
 }


class Validator extends DefaultHandler {
    public boolean validationError = false;
    public SAXParseException saxParseException = null;

    public void error(SAXParseException exception)
            throws SAXException {
        validationError = true;
        saxParseException = exception;
    }

    public void fatalError(SAXParseException exception)
            throws SAXException {
        validationError = true;
        saxParseException = exception;
    }

    public void warning(SAXParseException exception)
            throws SAXException {
    }
}

记得改:

1) xsd 文件位置的参数“http://your_url_schema_location”

2)指向您的 xml 文件的字符串“/home/user/myfile.xml” 。

我不必设置变量:-Djavax.xml.validation.SchemaFactory:http://www.w3.org/2001/XMLSchema=org.apache.xerces.jaxp.validation.XMLSchemaFactory

于 2012-09-21T13:41:15.410 回答
1

以防万一,仍然有人来这里寻找针对多个 XSD 验证 xml 或对象的解决方案,我在这里提到它

//Using **URL** is the most important here. With URL, the relative paths are resolved for include, import inside the xsd file. Just get the parent level xsd here (not all included xsds).

URL xsdUrl = getClass().getClassLoader().getResource("my/parent/schema.xsd");

SchemaFactory schemaFactory = SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI);
Schema schema = schemaFactory.newSchema(xsdUrl);

JAXBContext jaxbContext = JAXBContext.newInstance(MyClass.class);
Unmarshaller unmarshaller = jaxbContext.createUnmarshaller();
unmarshaller.setSchema(schema);

/* If you need to validate object against xsd, uncomment this
ObjectFactory objectFactory = new ObjectFactory();
JAXBElement<MyClass> wrappedObject = objectFactory.createMyClassObject(myClassObject); 
marshaller.marshal(wrappedShipmentMessage, new DefaultHandler());
*/

unmarshaller.unmarshal(getClass().getClassLoader().getResource("your/xml/file.xml"));
于 2020-01-09T14:35:52.420 回答
0

如果所有 XSD 都属于同一个命名空间,则创建一个新的 XSD 并将其他 XSD 导入其中。然后在 java 中使用新的 XSD 创建模式。

Schema schema = xmlSchemaFactory.newSchema(
    new StreamSource(this.getClass().getResourceAsStream("/path/to/all_in_one.xsd"));

all_in_one.xsd:

<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
 xmlns:ex="http://example.org/schema/" 
 targetNamespace="http://example.org/schema/" 
 elementFormDefault="unqualified"
 attributeFormDefault="unqualified">

    <xs:include schemaLocation="relative/path/to/a.xsd"></xs:include>
    <xs:include schemaLocation="relative/path/to/b.xsd"></xs:include>
    <xs:include schemaLocation="relative/path/to/c.xsd"></xs:include>

</xs:schema>
于 2020-06-14T15:27:06.133 回答