我有一个类X，该类X用 Apache CXF 和 JAX-WS 构建的Web服务的服务接口中使用。此类X没有默认构造函数，我想避免使用此默认构造函数。我想知道是否可以使用@XmlJavaTypeAdapter注释作为解决方案。
来自ClassXService的方法:
@WebMethod
@XmlJavaTypeAdapter(ClassXAdapter.class)
public void myMethod(ClassX arg0);
@WebMethod
@XmlJavaTypeAdapter(ClassXAdapter.class)
public ClassX myMethod2();
适配器扩展了XmlAdapter并正确定义了marshal和unmarshal方法。
但是，无论是否使用XmlJavaTypeAdapter批注，我总是会遇到相同的错误:
Exception in thread "main" org.apache.cxf.service.factory.ServiceConstructionException
at org.apache.cxf.jaxb.JAXBDataBinding.initialize(JAXBDataBinding.java:292)
at org.apache.cxf.service.factory.AbstractServiceFactoryBean.initializeDataBindings(AbstractServiceFactoryBean.java:86)
at org.apache.cxf.service.factory.ReflectionServiceFactoryBean.buildServiceFromClass(ReflectionServiceFactoryBean.java:438)
at org.apache.cxf.jaxws.support.JaxWsServiceFactoryBean.buildServiceFromClass(JaxWsServiceFactoryBean.java:682)
at org.apache.cxf.service.factory.ReflectionServiceFactoryBean.initializeServiceModel(ReflectionServiceFactoryBean.java:501)
at org.apache.cxf.service.factory.ReflectionServiceFactoryBean.create(ReflectionServiceFactoryBean.java:241)
at org.apache.cxf.jaxws.support.JaxWsServiceFactoryBean.create(JaxWsServiceFactoryBean.java:202)
at org.apache.cxf.frontend.AbstractWSDLBasedEndpointFactory.createEndpoint(AbstractWSDLBasedEndpointFactory.java:101)
at org.apache.cxf.frontend.ServerFactoryBean.create(ServerFactoryBean.java:157)
at org.apache.cxf.jaxws.JaxWsServerFactoryBean.create(JaxWsServerFactoryBean.java:202)
at my.package.Main.main(Main.java:35)
Caused by: com.sun.xml.bind.v2.runtime.IllegalAnnotationsException: 1 counts of IllegalAnnotationExceptions
my.package.ClassX does not have a no-arg default constructor.
this problem is related to the following location:
at my.package.ClassX
at private my.package.ClassX my.package.jaxws_asm.MyMethod.arg0
at my.package.jaxws_asm.MyMethod2
at com.sun.xml.bind.v2.runtime.IllegalAnnotationsException$Builder.check(IllegalAnnotationsException.java:102)
at com.sun.xml.bind.v2.runtime.JAXBContextImpl.getTypeInfoSet(JAXBContextImpl.java:472)
at com.sun.xml.bind.v2.runtime.JAXBContextImpl.<init>(JAXBContextImpl.java:302)
at com.sun.xml.bind.v2.runtime.JAXBContextImpl$JAXBContextBuilder.build(JAXBContextImpl.java:1140)
at com.sun.xml.bind.v2.ContextFactory.createContext(ContextFactory.java:154)
at com.sun.xml.bind.v2.ContextFactory.createContext(ContextFactory.java:121)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:616)
at javax.xml.bind.ContextFinder.newInstance(ContextFinder.java:222)
at javax.xml.bind.ContextFinder.find(ContextFinder.java:383)
at javax.xml.bind.JAXBContext.newInstance(JAXBContext.java:594)
at org.apache.cxf.jaxb.JAXBContextCache.createContext(JAXBContextCache.java:258)
at org.apache.cxf.jaxb.JAXBContextCache.getCachedContextAndSchemas(JAXBContextCache.java:167)
at org.apache.cxf.jaxb.JAXBDataBinding.createJAXBContextAndSchemas(JAXBDataBinding.java:418)
at org.apache.cxf.jaxb.JAXBDataBinding.initialize(JAXBDataBinding.java:290)
... 10 more
是否可以使用适配器避免提供默认的无参数构造函数？如果是，是否有人知道即使使用XmlJavaTypeAdapter注释也为什么会出现异常？
最佳答案
更改为: @WebMethod public void myMethod(@XmlJavaTypeAdapter(ClassXAdapter.class) ClassX arg0); @WebMethod @XmlJavaTypeAdapter(ClassXAdapter.class) public ClassX myMethod2();
适配器需要在参数而不是方法上定义。