一次系统断电维护之后，apache cxf 的 web service 接口调用一直报错：
java.lang.IllegalArgumentException: No enum constant org.apache.ws.commons.schema.XmlSchemaForm.
at java.lang.Enum.valueOf(Unknown Source) at org.apache.ws.commons.schema.EnumUtil.valueOf(EnumUtil.java:33) at org.apache.ws.commons.schema.XmlSchemaForm.schemaValueOf(XmlSchemaForm.java:32) at org.apache.ws.commons.schema.SchemaBuilder.getFormDefault(SchemaBuilder.java:181) at org.apache.ws.commons.schema.SchemaBuilder.handleSchemaElementBasics(SchemaBuilder.java:1489) at org.apache.ws.commons.schema.SchemaBuilder.handleXmlSchemaElement(SchemaBuilder.java:649) at org.apache.ws.commons.schema.XmlSchemaCollection.read(XmlSchemaCollection.java:540) at org.apache.cxf.common.xmlschema.SchemaCollection.read(SchemaCollection.java:129) at org.apache.cxf.wsdl11.SchemaUtil.extractSchema(SchemaUtil.java:140) at org.apache.cxf.wsdl11.SchemaUtil.getSchemas(SchemaUtil.java:73) at org.apache.cxf.wsdl11.SchemaUtil.getSchemas(SchemaUtil.java:65) at org.apache.cxf.wsdl11.SchemaUtil.getSchemas(SchemaUtil.java:60) at org.apache.cxf.wsdl11.WSDLServiceBuilder.getSchemas(WSDLServiceBuilder.java:372) at org.apache.cxf.wsdl11.WSDLServiceBuilder.buildServices(WSDLServiceBuilder.java:339) at org.apache.cxf.wsdl11.WSDLServiceBuilder.buildServices(WSDLServiceBuilder.java:203) at org.apache.cxf.wsdl11.WSDLServiceFactory.create(WSDLServiceFactory.java:175) at org.apache.cxf.service.factory.ReflectionServiceFactoryBean.buildServiceFromWSDL(ReflectionServiceFactoryBean.java:428) at org.apache.cxf.service.factory.ReflectionServiceFactoryBean.initializeServiceModel(ReflectionServiceFactoryBean.java:548) at org.apache.cxf.service.factory.ReflectionServiceFactoryBean.create(ReflectionServiceFactoryBean.java:265) at org.apache.cxf.jaxws.support.JaxWsServiceFactoryBean.create(JaxWsServiceFactoryBean.java:215) at org.apache.cxf.frontend.AbstractWSDLBasedEndpointFactory.createEndpoint(AbstractWSDLBasedEndpointFactory.java:102) at org.apache.cxf.frontend.ClientFactoryBean.create(ClientFactoryBean.java:91) at org.apache.cxf.frontend.ClientProxyFactoryBean.create(ClientProxyFactoryBean.java:157) at org.apache.cxf.jaxws.JaxWsProxyFactoryBean.create(JaxWsProxyFactoryBean.java:142) at org.apache.cxf.jaxws.ServiceImpl.createPort(ServiceImpl.java:478) at org.apache.cxf.jaxws.ServiceImpl.getPort(ServiceImpl.java:345) at org.apache.cxf.jaxws.ServiceImpl.getPort(ServiceImpl.java:336) at javax.xml.ws.Service.getPort(Unknown Source) at cn.com.xxxx.PTService.getPTServiceHttpSoap11Endpoint(PTService.java:72)这个错误很奇特：
java.lang.IllegalArgumentException: No enum constant org.apache.ws.commons.schema.XmlSchemaForm.
at java.lang.Enum.valueOf(Unknown Source)at org.apache.ws.commons.schema.EnumUtil.valueOf(EnumUtil.java:33)XmlSchemaForm. 这里 点 . 后面 是空的？？？？？
尼玛啥意思。。。
原因应该是传给 Enum.valueOf 方法的参数有问题（ java.lang.Enum.valueOf(Unknown Source)），导致报错了。
最后 定位到 jar包：xmlschema-core-2.1.0.jar ，查看源码：
public enum XmlSchemaForm { NONE, QUALIFIED, UNQUALIFIED; public static XmlSchemaForm schemaValueOf(String name) { return EnumUtil.valueOf(XmlSchemaForm.class, name); } @Override public String toString() { switch (this) { case QUALIFIED: return "qualified"; case UNQUALIFIED: return "unqualified"; } return "none"; }} 所以 org.apache.ws.commons.schema.XmlSchemaForm. 可能应该是 org.apache.ws.commons.schema.XmlSchemaForm.NONE
把 2.1.0 换成最新的 xmlschema-core-2.2.3.jar，测试通过。不再报错。
具体什么原因还是没有查清楚，不过问题解决了。记录一下。