java 如何在使用 sax 解析器解析时针对给定的 xsd 文件验证 xml 文件？
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How to validate a xml file against a given xsd file while parsing it with a sax parser?
提问by tangens
I want to parse a xml file using a SAXParser or XMLReader and verify that the file conforms to a specific xsd file(new File( "example.xsd" )).
我想使用 SAXParser 或 XMLReader 解析 xml 文件并验证该文件是否符合特定的 xsd文件( new File( "example.xsd" ))。
It's easy to
很容易
do the validation against a xsd file in an extra step using a
Validatorlike in this SO answer.to validate while parsing by specifying the name of the xsd as
"http://apache.org/xml/properties/schema/external-noNamespaceSchemaLocation"like in this SO answer.
使用此 SO 答案中的
Validator类似方法在额外的步骤中对 xsd 文件进行验证。通过
"http://apache.org/xml/properties/schema/external-noNamespaceSchemaLocation"在此 SO answer 中指定 xsd 的名称来在解析时进行验证。
But how can I validate against a new File( "example.xsd" )while parsing?
但是我如何验证一段new File( "example.xsd" )时间解析？
回答by McDowell
Assuming Java 5 or above, set the schema on the SAXParserFactory:
假设 Java 5 或更高版本，在SAXParserFactory上设置模式：
SchemaFactory schemaFactory = SchemaFactory
.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI);
Schema schema = schemaFactory.newSchema(new File("myschema.xsd"));
SAXParserFactory saxFactory = SAXParserFactory.newInstance();
saxFactory.setSchema(schema);
SAXParser parser = saxFactory.newSAXParser();
parser.parse("data.xml", new DefaultHandler() {
// TODO: other handler methods
@Override
public void error(SAXParseException e) throws SAXException {
throw e;
}
});
You handle validation errors by overriding the error methodon your handler and acting as you see fit.
