最近使用javax.xml.validation.Validator及Schema对XML Document进行校验，但是遇到了一个问题：同样的代码在Oracle JDK下运行成功，但是在IBM JDK下就报错：
org.xml.sax.SAXParseException: cvc-elt.1：找不到元素“root”的声明。
at org.apache.xerces.util.ErrorHandlerWrapper.createSAXParseException(Unknown Source)
at org.apache.xerces.util.ErrorHandlerWrapper.error(Unknown Source)
at org.apache.xerces.impl.XMLErrorReporter.reportError(Unknown Source)
at org.apache.xerces.impl.XMLErrorReporter.reportError(Unknown Source)
at org.apache.xerces.impl.xs.XMLSchemaValidator.handleStartElement(Unknown Source)
at org.apache.xerces.impl.xs.XMLSchemaValidator.startElement(Unknown Source)
at org.apache.xerces.jaxp.validation.DOMValidatorHelper.beginNode(Unknown Source)
at org.apache.xerces.jaxp.validation.DOMValidatorHelper.validate(Unknown Source)
at org.apache.xerces.jaxp.validation.DOMValidatorHelper.validate(Unknown Source)
at org.apache.xerces.jaxp.validation.ValidatorImpl.validate(Unknown Source)
at javax.xml.validation.Validator.validate(Unknown Source)
at albert.yao.xml.ValidateXMLDocument.main(ValidateXMLDocument.java:63)
应该是namespace设置的问题，折腾了几天，只能先用Oracle的JDK了，等后面有时间再研究
