XmlJavaTypeAdapter與CXF和JAX-WS

我有一個類X，其與的Apache CXF和JAX-WS構建的Web服務的服務接口使用。這個類沒有默認的構造函數，我想避免這個默認的構造函數。我想知道我是否可以使用@XmlJavaTypeAdapter註解作爲解決方案。XmlJavaTypeAdapter與CXF和JAX-WS

從ClassXService的方法：

@WebMethod 
@XmlJavaTypeAdapter(ClassXAdapter.class) 
public void myMethod(ClassX arg0); 

@WebMethod 
@XmlJavaTypeAdapter(ClassXAdapter.class) 
public ClassX myMethod2();

適配器延伸XmlAdapter和正確地限定了編組和unmarshal方法。

但是，使用或不使用XmlJavaTypeAdapter註釋，我總是得到同樣的錯誤：

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

是沒可能使用適配器，以避免提供一個默認的無參數的構造？如果是的話，是否有人有一個想法，即使使用XmlJavaTypeAdapter註釋時，爲什麼我會得到一個異常？

來源

2011-09-17 Laurent

將其更改爲：

 

    @WebMethod 
    public void myMethod(@XmlJavaTypeAdapter(ClassXAdapter.class) ClassX arg0); 

    @WebMethod 
    @XmlJavaTypeAdapter(ClassXAdapter.class) 
    public ClassX myMethod2();

適配器需要在規定的參數，而不是方法。

來源

2011-09-17 23:40:58

謝謝，它解決了我的問題。 – Laurent

退房此鏈接： http://weblogs.java.net/blog/kohsuke/archive/2005/09/using_jaxb_20s.html

這傢伙已經幫我的JAXB問題不少。

來源

2011-09-17 17:07:49

不知道。人物。 –

他更爲人知的是爲Hudson CI服務器創建和貢獻（現在名爲Jenkins）難怪他贏得了[OReilly OpenSource獎]（http://kohsuke.org/2011/07/28/oreilly-open-source-award- 2011 /）今年 – stratwine

像這樣：

public static void main(String[] args) throws Exception { 
    JAXBContext context = JAXBContext.newInstance(Foo.class); 
    StringWriter stringWriter = new StringWriter(); 
    context.createMarshaller().marshal(new Foo(new Bar(10)), stringWriter); 
    System.out.println(stringWriter); 
    Object o = context.createUnmarshaller().unmarshal(new StringReader(stringWriter.toString())); 
    System.out.println(o); 
} 

@XmlRootElement 
static class Foo { 
    private Bar bar; 
    Foo() {} 
    Foo(Bar bar) { this.bar = bar; } 
    @XmlJavaTypeAdapter(BarAdapter.class) 
    public Bar getBar() { return bar; } 
    public void setBar(Bar bar) { this.bar = bar; } 
    public String toString() { return "Foo{bar=" + bar + '}'; } 
} 

static class Bar { 
    private int x; 
    Bar(int x) { this.x = x; } 
    public int getX() { return x; } 
    public void setX(int x) { this.x = x; } 
    public String toString() { return "Bar{x=" + x + '}'; } 
} 

static class JaxbFriendlyBar { 
    private int x; 
    JaxbFriendlyBar() {} 
    public int getX() { return x; } 
    public void setX(int x) { this.x = x; } 
} 

static class BarAdapter extends XmlAdapter<JaxbFriendlyBar, Bar> { 
    @Override 
    public JaxbFriendlyBar marshal(Bar bar) throws Exception { 
     JaxbFriendlyBar result = new JaxbFriendlyBar(); 
     result.setX(bar.getX()); 
     return result; 
    } 

    @Override 
    public Bar unmarshal(JaxbFriendlyBar jaxbFriendlyBar) throws Exception { 
     return new Bar(jaxbFriendlyBar.getX()); 
    } 
}

或者只是添加無參數的默認構造函數：

Bar() {}

來源

2011-09-17 18:51:34

XmlJavaTypeAdapter與CXF和JAX-WS

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