java.lang.IllegalArgumentException : No SchemaFactory that implements the schema language specified 异常

Question

我收到以下异常:

java.lang.IllegalArgumentException: No SchemaFactory that implements the schema language specified by: http://www.w3.org/2001/XMLSchema-instance could be loaded at javax.xml.validation.SchemaFactory.newInstance(SchemaFactory.java:204) at MAIN.SchemaImport3.validateXMLSchema(SchemaImport3.java:74) at MAIN.SchemaImport3.main(SchemaImport3.java:62)

这是我的代码:

URL source;
source = new URL(schemaList.getDocumentBaseURI());
SchemaFactory factory = SchemaFactory.newInstance(
                         XMLConstants.W3C_XML_SCHEMA_INSTANCE_NS_URI);

Answer 1

使用 XMLConstants.W3C_XML_SCHEMA_NS_URI:

SchemaFactory factory = SchemaFactory.newInstance( 
    XMLConstants.W3C_XML_SCHEMA_NS_URI 
);

URI“http://www.w3.org/2001/XMLSchema-instance”(XMLConstants.W3C_XML_SCHEMA_INSTANCE_NS_URI 的值)本身不是一种 XML 模式语言，而是XML 架构。

W3C XML Schema 的正确名称是“http://www.w3.org/2001/XMLSchema”(XMLConstants.W3C_XML_SCHEMA_NS_URI 的值)。