摘要: 访问AIX系统中部署在OC4J中的web模块的页面时遇到这个错误：
javax.xml.parsers.FactoryConfigurationError: Provider null could not be instantiated:
java.lang.NullPointerException
at javax.xml.parsers.SAXParserFactory.newInstance(Unknown Source)
at org.apache.commons.digester.Digester.getFactory(Digester.java:478)
at org.apache.commons.digester.Digester.getParser(Digester.java:683)
at org.apache.commons.digester.Digester.getXMLReader(Digester.java:891)
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