XSD验证XML的步骤

发布时间：2023-12-26 21:09:33 所属栏目：教程来源：DaWei

导读： 我们将使用基于Java的XSD验证器来针对students.xsd验证文件：students.xml。

文件：students.xml -

<?xml version = 1.0?>
<class>
<student rollno = 1010>
<firstnam

我们将使用基于Java的XSD验证器来针对students.xsd验证文件：students.xml。

文件：students.xml -

<?xml version = 1.0?>
<class>
<student rollno = 1010>
<firstname>Dinkar</firstname>
<lastname>King</lastname>
<nickname>Dinkar</nickname>
<marks>85</marks>
</student>
<student rollno = 1020>
<firstname>Vaneet</firstname>
<lastname>Su</lastname>
<nickname>Vaneet</nickname>
<marks>95</marks>
</student>
<student rollno = 1030>
<firstname>Jasvir</firstname>
<lastname>Lee</lastname>
<nickname>Jasvir</nickname>
<marks>90</marks>
</student>
</class>

文件：students.xsd -

<?xml version = 1.0?>
<xs:schema xmlns:xs = http://www.w3.org/2001/XMLSchema>
<xs:element name = 'class'>
<xs:complexType>
<xs:sequence>
<xs:element name = 'student' type = 'StudentType' minOccurs = '0'
maxOccurs = 'unbounded' />
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:complexType name = StudentType>
<xs:sequence>
<xs:element name = firstname type = xs:string/>
<xs:element name = lastname type = xs:string/>
<xs:element name = nickname type = xs:string/>
<xs:element name = marks type = xs:positiveInteger/>
</xs:sequence>
<xs:attribute name = 'rollno' type = 'xs:positiveInteger'/>
</xs:complexType>
</xs:schema>

文件：XSDValidator.java -

import java.io.File;
import java.io.IOException;
import javax.xml.XMLConstants;
import javax.xml.transform.stream.StreamSource;
import javax.xml.validation.Schema;
import javax.xml.validation.SchemaFactory;
import javax.xml.validation.Validator;
import org.xml.sax.SAXException;
public class XSDValidator {
public static void main(String[] args) {
if(args.length !=2){
System.out.println(Usage : XSDValidator <file-name.xsd> <file-name.xml> );
} else {
boolean isValid = validateXMLSchema(args[0],args[1]);
if(isValid){
System.out.println(args[1] + is valid against + args[0]);
} else {
System.out.println(args[1] + is not valid against + args[0]);
}
}
}
public static boolean validateXMLSchema(String xsdpath, String xmlPath){
try {
SchemaFactory factory =
SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI);
Schema schema = factory.newSchema(new File(xsdpath));
Validator validator = schema.newValidator();
validator.validate(new StreamSource(new File(xmlPath)));
} catch (IOException e){
System.out.println(Exception: +e.getMessage());
return false;
}catch(SAXException e1){
System.out.println(SAX Exception: +e1.getMessage());
return false;
}
return true;
}
}
针对XSD验证XML的步骤

将XSDValidator.java文件复制到一个工作目录位置，例如：D:\worksp\xsd，将students.xml 和students.xsd 这两个文件复制到相同的工作目录位置(D:\worksp\xsd)。
打开命令行控制台编译XSDValidator.java，确保在计算机上安装了JDK 1.5以及类路径。有关如何使用JAVA的详细信息，请参阅JAVA教程。

D:\worksp\xsd>javac XSDValidator.java
执行XSDValidator，并将students.xsd和students.xml这两个文件名称作为参数传递。输出结果如下所示：

D:\worksp\xsd>java XSDValidator students.xsd students.xml
students.xml is valid against students.xsd

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