xml 校验

package sax.parsing;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;

import javax.xml.XMLConstants;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import javax.xml.validation.Schema;
import javax.xml.validation.SchemaFactory;

import org.dom4j.DocumentException;
import org.dom4j.io.SAXReader;
import org.dom4j.io.SAXValidator;
import org.testng.annotations.Test;
import org.w3c.dom.Document;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;
import org.xml.sax.XMLReader;
import org.xml.sax.helpers.DefaultHandler;
import org.xml.sax.helpers.XMLReaderFactory;

public class ErrorProcessor extends DefaultHandler {

    @Override
    public void warning(SAXParseException exception) throws SAXException {
        System.out.println("触发警告：");
        System.err.println("warning： " + getLocationString(exception) + ": " + exception.getMessage());
    }

    @Override
    public void error(SAXParseException exception) throws SAXException {
        System.out.println("触发错误：");
        System.err.println("error： " + getLocationString(exception) + ": " + exception.getMessage());
    }

    @Override
    public void fatalError(SAXParseException exception) throws SAXException {
        System.out.println("触发致命错误：");
        System.err.println("fatal error： " + getLocationString(exception) + ": " + exception.getMessage());
    }

    private String getLocationString(SAXParseException ex) {
        StringBuffer buffer = new StringBuffer();

        String publicId = ex.getPublicId();
        if (publicId != null) {
            buffer.append(publicId);
            buffer.append("  ");
        }

        String systemId = ex.getSystemId();
        if (systemId != null) {
            buffer.append(systemId);
            buffer.append(':');
        }

        buffer.append(ex.getLineNumber());
        buffer.append(':');
        buffer.append(ex.getColumnNumber());

        return buffer.toString();
    }

    @Override
    public void endElement(String uri, String localName, String qName) throws SAXException {
        System.out.println("</" + qName + ">");
    }

    /**
     *  在DOM文件构建工厂中设置校验Schema文件
     * @throws IOException
     * @throws SAXException
     * @throws ParserConfigurationException
     */
    @Test
    public void parseWithSchema() throws SAXException, IOException, ParserConfigurationException {
        System.out.println("========== parseWithSchema() start ===============");

        SchemaFactory schemaFactory = SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI);
        Schema schema = schemaFactory.newSchema(new File("src/students.xsd"));
        DocumentBuilderFactory builderFactory = DocumentBuilderFactory.newInstance();
        builderFactory.setSchema(schema);
        DocumentBuilder builder = builderFactory.newDocumentBuilder();
        builder.setErrorHandler(new ErrorProcessor());
        Document doc = builder.parse("src/students.xml");

        System.out.println("========== parseWithSchema() end ===============");
    }

    @Test
    public void read() throws FileNotFoundException, IOException, SAXException {

        System.out.println("========== read() start (仅语法校验) ===============");
        XMLReader xmlReader = XMLReaderFactory.createXMLReader();
        xmlReader.setFeature("http://xml.org/sax/features/validation", true);
        xmlReader.setFeature("http://xml.org/sax/features/namespaces", true);
        xmlReader.setErrorHandler(new ErrorProcessor());
        xmlReader.parse(new InputSource(new FileInputStream("src/students.xml")));
        System.out.println("========== read() end ===============");
    }

    @Test
    public void saxValidate() throws ParserConfigurationException, SAXException, DocumentException, FileNotFoundException, IOException {
        System.out.println("========== saxValidate() start ===============");

        SAXParserFactory parserFactory = SAXParserFactory.newInstance();
        parserFactory.setValidating(true); // 等价于 xmlReader.setFeature("http://xml.org/sax/features/validation", true);
        parserFactory.setNamespaceAware(true); // 等价于  reader.setFeature("http://xml.org/sax/features/namespaces",true);

        SAXParser parser = parserFactory.newSAXParser();
        parser.setProperty("http://java.sun.com/xml/jaxp/properties/schemaLanguage", "http://www.w3.org/2001/XMLSchema");
        parser.setProperty("http://java.sun.com/xml/jaxp/properties/schemaSource", "file:/D:/eclipse-luna-jee/workspace/xsl_trans/src/students.xsd");

        XMLReader xmlReader = parser.getXMLReader();
        xmlReader.setErrorHandler(new ErrorProcessor()); // 错误时触发
        //xmlReader.setContentHandler(new ErrorProcessor()); // 标签开始、结束等事件时触发
        xmlReader.parse(new InputSource(new FileInputStream("src/students.xml")));

        System.out.println("========== saxValidate() end ===============");
    }

    @Test
    public void dom4jValidate() throws ParserConfigurationException, SAXException, DocumentException, FileNotFoundException, IOException {
        System.out.println("========== dom4jValidate() start ===============");

        SAXParserFactory parserFactory = SAXParserFactory.newInstance();
        parserFactory.setValidating(true); // 等价于 xmlReader.setFeature("http://xml.org/sax/features/validation", true);
        parserFactory.setNamespaceAware(true); // 等价于  reader.setFeature("http://xml.org/sax/features/namespaces",true);

        SAXParser parser = parserFactory.newSAXParser();
        parser.setProperty("http://java.sun.com/xml/jaxp/properties/schemaLanguage", "http://www.w3.org/2001/XMLSchema");
        parser.setProperty("http://java.sun.com/xml/jaxp/properties/schemaSource", "file:/D:/eclipse-luna-jee/workspace/xsl_trans/src/students.xsd");

        XMLReader xmlReader = parser.getXMLReader();

        /*
         * dom4j的校验处理过程
         *         org.dom4j.io.SAXReader
         *         org.dom4j.Document
         *         org.dom4j.io.SAXValidator
         */
        SAXReader reader = new SAXReader();
        org.dom4j.Document doc = reader.read(new File("src/students.xml"));

        SAXValidator validator = new SAXValidator(xmlReader);
        validator.setErrorHandler(new ErrorProcessor());
        validator.validate(doc);
        System.out.println("========== dom4jValidate() end ===============");
    }
}

输出：

========== parseWithSchema() start ===============
error： file:///D:/eclipse-luna-jee/workspace/xsl_trans/src/students.xml:4:41: cvc-complex-type.3.2.2: Attribute 'attr_test' is not allowed to appear in element 'student'.触发错误：

触发错误：
error： file:///D:/eclipse-luna-jee/workspace/xsl_trans/src/students.xml:10:40: cvc-complex-type.2.4.a: Invalid content was found starting with element 'elem_test1'. One of '{student}' is expected.
========== parseWithSchema() end ===============

========== read() start (仅语法校验) ===============
触发错误：
error： 3:10: Document is invalid: no grammar found.
触发错误：
error： 3:10: Document root element "students", must match DOCTYPE root "null".
========== read() end ===============

========== saxValidate() start ===============
触发错误：
error： 4:41: cvc-complex-type.3.2.2: Attribute 'attr_test' is not allowed to appear in element 'student'.
触发错误：
error： 10:40: cvc-complex-type.2.4.a: Invalid content was found starting with element 'elem_test1'. One of '{student}' is expected.
========== saxValidate() end ===============

========== dom4jValidate() start ===============
触发错误：
error： file:///D:/eclipse-luna-jee/workspace/xsl_trans/src/students.xml:3:41: cvc-complex-type.3.2.2: Attribute 'attr_test' is not allowed to appear in element 'student'.
触发错误：
error： file:///D:/eclipse-luna-jee/workspace/xsl_trans/src/students.xml:9:39: cvc-complex-type.2.4.a: Invalid content was found starting with element 'elem_test1'. One of '{student}' is expected.
========== dom4jValidate() end ===============

students.xml

<?xml version="1.0" encoding="utf-8" ?>

<students>
    <student sn="01" attr_test="errorAttr"><!-- 在student与name父子元素节点之间的是一个文本节点（'\n\t\t'） -->
        <name>张三</name>
        <age>18</age>
        <score>100</score>
    </student>

    <elem_test1 attr_test1="errorAttr1" />

    <student sn="02">
        <name>lisi</name>
        <age>20</age>
        <score>100</score>
    </student>

    <elem_test2 attr_test1="errorAttr2" />
</students>

students.xsd

<?xml version="1.0" encoding="utf-8" ?>

<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
    <xs:element name="students">
        <xs:complexType>
            <xs:sequence>
                <xs:element name="student" type="studentType" maxOccurs="unbounded" />
            </xs:sequence>
        </xs:complexType>
    </xs:element>

    <xs:complexType name="studentType">
        <xs:sequence>
            <xs:element name="name" type="xs:token" />
            <xs:element name="age" type="xs:positiveInteger" />
            <xs:element name="score" type="xs:float" />
        </xs:sequence>
        <xs:attribute name="sn" type="xs:token" />
    </xs:complexType>
</xs:schema>