小编典典

Java运行时库支持验证。上次我检查的是幕后的Apache Xerces解析器。你可能应该使用javax.xml.validation.Validator。

import javax.xml.XMLConstants;

import javax.xml.transform.Source;

import javax.xml.transform.stream.StreamSource;

import javax.xml.validation.*;

import java.net.URL;

import org.xml.sax.SAXException;

//import java.io.File; // if you use File

import java.io.IOException;

...

URL schemaFile = new URL("http://host:port/filename.xsd");

// webapp example xsd:

// URL schemaFile = new URL("http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd");

// local file example:

// File schemaFile = new File("/location/to/localfile.xsd"); // etc.

Source xmlFile = new StreamSource(new File("web.xml"));

SchemaFactory schemaFactory = SchemaFactory

.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI);

try {

Schema schema = schemaFactory.newSchema(schemaFile);

Validator validator = schema.newValidator();

validator.validate(xmlFile);

System.out.println(xmlFile.getSystemId() + " is valid");

} catch (SAXException e) {

System.out.println(xmlFile.getSystemId() + " is NOT valid reason:" + e);

} catch (IOException e) {}

你不应使用DOMParser来验证文档(除非你的目标仍然是创建文档对象模型)。这将在解析文档时开始创建DOM对象-如果你不打算使用它们，那将很浪费。

2020-03-01