XML的DTD验证与Schema验证示例

Posted 2021-03-30 开发学习笔记

DTD验证

<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE books[ <!ELEMENT books (book*)> <!ELEMENT book (name,author,price)> <!ELEMENT name (#PCDATA)> <!ELEMENT author (#PCDATA)> <!ELEMENT price (#PCDATA)> <!ATTLIST book id CDATA #REQUIRED>]><books> <book id="1001"> <name>java开发</name> <author>张三</author> <price>98.5</price> </book> <book id="1002"> <name>python开发</name> <author>李四</author> <price>89.5</price> </book></books>

Schema验证

<?xml version="1.0" encoding="UTF-8"?><books xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"  xsi:noNamespaceSchemaLocation="{books.xsd}"> <book id="1001"> <name>java开发</name> <author>张三</author> <price>98.5</price> </book> <book id="1002"> <name>python开发</name> <author>李四</author> <price>89.5</price> </book></books>

<?xml version="1.0" encoding="UTF-8"?><xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"> <xs:element name="books"> <xs:complexType> <xs:sequence> <xs:element name="book" maxOccurs="unbounded"> <xs:complexType> <xs:sequence> <xs:element name="name" type="xs:string"></xs:element> <xs:element name="author" type="xs:string"></xs:element> <xs:element name="price" type="xs:double"></xs:element> </xs:sequence> <xs:attribute name="id" type="xs:positiveInteger" use="required"></xs:attribute> </xs:complexType> </xs:element> </xs:sequence> </xs:complexType> </xs:element></xs:schema>

Schema验证测试代码

package com.bxkuaie.schema;
import java.io.File;import java.io.IOException;
import javax.xml.transform.Source;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 Test { public static void main(String[] args) throws SAXException { //(1)创建SchemaFactory工厂 SchemaFactory sch=SchemaFactory.newInstance("http://www.w3.org/2001/XMLSchema"); //(2)建立验证文件对象 File schemaFile=new File("books.xsd");  //(3)利用SchemaFactory工厂对象，接收验证的文件对象，生成Schema对象 Schema schema=sch.newSchema(schemaFile); //(4)产生对此schema的验证器 Validator validator=schema.newValidator(); //(5)要验证的数据(准备数据源) Source source=new StreamSource("books.xml"); //(6)开始验证 try { validator.validate(source); System.out.println("成功"); } catch (IOException e) { System.out.println("失败"); e.printStackTrace(); } }}