以下代码在Java 6中运行正常

String resultContent = "<OTA_AVE_RS><Response>......</Response></OTA_AVE_RS>";
                
OTARS otaRS = null;
try {
	JAXBContext context = JAXBContext.newInstance(OTARS.class);
	Unmarshaller shaller = context.createUnmarshaller();
	otaRS = (OTARS)shaller.unmarshal(new StringReader(resultContent));
}catch(Exception e) {
	e.printStackTrace();
}

现在我们升级到Java 8，在执行代码时得到下面这个异常：

org.xml.sax.SAXNotRecognizedException: Feature 'http://javax.xml.XMLConstants/feature/secure-processing' is not recognized.
	at org.apache.xerces.parsers.AbstractSAXParser.setFeature(Unknown Source)
	at org.apache.xerces.jaxp.SAXParserImpl.setFeatures(Unknown Source)
	at org.apache.xerces.jaxp.SAXParserImpl.<init>(Unknown Source)
	at org.apache.xerces.jaxp.SAXParserFactoryImpl.newSAXParserImpl(Unknown Source)
	at org.apache.xerces.jaxp.SAXParserFactoryImpl.setFeature(Unknown Source)
	at com.sun.xml.internal.bind.v2.util.XmlFactory.createParserFactory(XmlFactory.java:121)
	at com.sun.xml.internal.bind.v2.runtime.unmarshaller.UnmarshallerImpl.getXMLReader(UnmarshallerImpl.java:139)
	at javax.xml.bind.helpers.AbstractUnmarshallerImpl.unmarshal(AbstractUnmarshallerImpl.java:157)
	at javax.xml.bind.helpers.AbstractUnmarshallerImpl.unmarshal(AbstractUnmarshallerImpl.java:214)
	at com.liantuo.finance.utils.AirAvailUtils.main(AirAvailUtils.java:98)

java.lang.IllegalStateException: org.xml.sax.SAXNotRecognizedException: Feature 'http://javax.xml.XMLConstants/feature/secure-processing' is not recognized.
	at com.sun.xml.internal.bind.v2.util.XmlFactory.createParserFactory(XmlFactory.java:128)
	at com.sun.xml.internal.bind.v2.runtime.unmarshaller.UnmarshallerImpl.getXMLReader(UnmarshallerImpl.java:139)
	at javax.xml.bind.helpers.AbstractUnmarshallerImpl.unmarshal(AbstractUnmarshallerImpl.java:157)
	at javax.xml.bind.helpers.AbstractUnmarshallerImpl.unmarshal(AbstractUnmarshallerImpl.java:214)
	at com.liantuo.finance.utils.AirAvailUtils.main(AirAvailUtils.java:98)
Caused by: org.xml.sax.SAXNotRecognizedException: Feature 'http://javax.xml.XMLConstants/feature/secure-processing' is not recognized.
	at org.apache.xerces.parsers.AbstractSAXParser.setFeature(Unknown Source)
	at org.apache.xerces.jaxp.SAXParserImpl.setFeatures(Unknown Source)
	at org.apache.xerces.jaxp.SAXParserImpl.<init>(Unknown Source)
	at org.apache.xerces.jaxp.SAXParserFactoryImpl.newSAXParserImpl(Unknown Source)
	at org.apache.xerces.jaxp.SAXParserFactoryImpl.setFeature(Unknown Source)
	at com.sun.xml.internal.bind.v2.util.XmlFactory.createParserFactory(XmlFactory.java:121)
	... 4 more

旧版本的xerces与Java 8中的JAX-B不兼容，解决问题的原因是xerces版本过低，更新版本的xerces(2.11.0)中依赖关系：

<dependency>
	<groupId>xerces</groupId>
	<artifactId>xercesImpl</artifactId>
	<version>2.11.0</version>
	<scope>test</scope>
</dependency>

旧版本的xerces依赖我用的是：

<dependency>
	<groupId>xerces</groupId>
	<artifactId>xercesImpl</artifactId>
	<version>2.6.2</version>
</dependency>

Xerces是Java生态圈使用最广泛的XML解析器，基本上所有的类库和框架都会在一定程度上使用它。