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。@H_301_3@
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) {}
模式工厂常量是http://www.w3.org/2001/XMLSchema定义XSD 的字符串。上面的代码针对URL验证了WAR部署描述符，http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd但你同样可以针对本地文件进行验证。@H_301_3@
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。@H_301_3@
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