使用 xml 验证和 xsd 模式的问题

Question

这是我第一次使用 xsd 来验证 java 中的 xml 文档，我似乎真的无法让它工作。

嗯，首先是我的 xml 文档结构，Employees.xml:

<?xml version="1.0"?>
<x:Employees xmlns:x="urn:Employees">
  <Employee id="1">
    <name>Some Guy</name>
    <gender>Male</gender>
    <role>Java Developer</role>
  </Employee>
  <Employee id="2">
    <name>Some lady</name>
    <gender>Female</gender>
    <role>CEO</role>
  </Employee>
</x:Employees>

这是我的 xsd 文件结构，EmployeesXmlSchema.xsd:

<xsd:schema elementFormDefault="qualified" xmlns:xsd="http://www.w3.org/2001/XMLSchema" 
xmlns:x="urn:Employees" targetNamespace="urn:Employees">

<xsd:element name="Employees" type="x:Employees"/>
<xsd:complexType name="Employees">
<xsd:sequence>
    <xsd:element name="Employee" type="x:Employee" maxOccurs="unbounded"/>
</xsd:sequence>
</xsd:complexType>
<xsd:complexType name="Employee">
    <xsd:sequence>
        <xsd:element name="name" type="xsd:string"/>
        <xsd:element name="gender" type="xsd:string"/>
        <xsd:element name="role" type="xsd:string"/>
    </xsd:sequence>
    <xsd:attribute name="id" type="xsd:string"/>
</xsd:complexType>
</xsd:schema>

这里是 java 代码，试图验证 xml 文档：

try {
            String language = XMLConstants.W3C_XML_SCHEMA_NS_URI;
            SchemaFactory factory = SchemaFactory.newInstance(language);
            schema = factory.newSchema(schemaFile);

            // Parse the XML document to DOM Document, and then validate it
            DocumentBuilderFactory builderFactory = DocumentBuilderFactory.newInstance();
            builderFactory.setNamespaceAware(true);
            DocumentBuilder builder = builderFactory.newDocumentBuilder();
            Document doc = builder.parse(xmlFile);
            DOMSource source = new DOMSource(doc);

            Validator validator = schema.newValidator();
            validator.validate(source);

            return true;

        } catch (Exception e) {
            e.printStackTrace();
            return false;

        }

我得到的错误是 SAXParseException 并说：

Invalid content was found starting with element 'Employee'. One of '{"urn:Employees":Employee}' is expected.

我真的希望有人能向我解释为什么会出错。

任何帮助将不胜感激

Answer 1

首先，您应该更正您的XML：

<Employees xmlns="urn:Employees" id="1">
    <name>Some Guy</name>
    <gender>Male</gender>
    <role>Java Developer</role>
</Employees>

或更正您的 XSD：

<xsd:schema elementFormDefault="qualified" xmlns:xsd="http://www.w3.org/2001/XMLSchema" 
xmlns:x="urn:Employees" targetNamespace="urn:Employees">

<xsd:element name="Employees" type="x:Employees"/>
<xsd:complexType name="Employees">
<xsd:sequence>
    <xsd:element name="Employee" type="x:Employee" maxOccurs="unbounded"/>
</xsd:sequence>
</xsd:complexType>
<xsd:complexType name="Employee">
    <xsd:sequence>
        <xsd:element name="name" type="xsd:string"/>
        <xsd:element name="gender" type="xsd:string"/>
        <xsd:element name="role" type="xsd:string"/>
    </xsd:sequence>
    <xsd:attribute name="id" type="xsd:string"/>
</xsd:complexType>
</xsd:schema>

其次，您应该启用对 XML 命名空间的支持：

DocumentBuilderFactory builderFactory = DocumentBuilderFactory.newInstance();
builderFactory.setNamespaceAware(true);

使用 xml 验证和 xsd 模式的问题

Problems using xml validation with xsd schema

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