＆＃39; HTTP：//javax.xml.XMLConstants/feature/secure-processing'不被承认

Question

我们将应用程序升级到Java8和Xerces 2.8版本，我们收到以下警告：

Warning: org.apache.xerces.parsers.SAXParser: Feature 'http://javax.xml.XMLConstants/feature/secure-processing' is not recognized.
Warning: org.apache.xerces.parsers.SAXParser: Property 'http://javax.xml.XMLConstants/property/accessExternalDTD' is not recognized.
Warning: org.apache.xerces.parsers.SAXParser: Property 'http://www.oracle.com/xml/jaxp/properties/entityExpansionLimit' is not recognized.

请告诉我们为什么会收到此警告？

跳过此属性/警告有什么影响？

如果出现以下警告，“entityExpansionLimit”和“accessExternalDTD”的值是多少？它是默认值还是null？

Answer 1

应用程序将运行：

"-Djava.endorsed.dirs=C:\WorkAxis\AxisTest\endorsed"

和目录C:\WorkAxis\AxisTest\endorsed包含以下文件：

xalan-2.7.2.jar;
serializer-2.7.2.jar; 
xml-apis-1.4.01.jar;
xercesImpl-2.11.0.jar;