通過Apache CXF框架生成Web服務時出錯

Question

我想通過使用Apache CXF框架在Eclipse中生成Web服務。 首先，我創建對應於所需Web服務的Java類，然後生成兩個動態Web項目，一個用於Web服務（wsdl文件），另一個用於客戶端。在創建Web服務後，Web服務運行良好，但過了一段時間（一天三天）後，服務器啓動時顯示圖像中顯示錯誤。

INFO: Starting service Catalina 
Dec 7, 2011 9:27:55 PM org.apache.catalina.core.StandardEngine startInternal 
INFO: Starting Servlet Engine: Apache Tomcat/7.0.4 
Dec 7, 2011 9:27:55 PM org.apache.catalina.loader.WebappClassLoader validateJarFile 
INFO: validateJarFile(C:\Documents and Settings\user\workspace\.metadata\.plugins\org.eclipse.wst.server.core\tmp0\wtpwebapps\Prosys_Doctorat_Servicii_FAS_servicii\WEB-INF\lib\geronimo-servlet_3.0_spec-1.0.jar) - jar not loaded. See Servlet Spec 2.3, section 9.7.2. Offending class: javax/servlet/Servlet.class 
Dec 7, 2011 9:27:59 PM org.apache.catalina.core.StandardContext listenerStart 
SEVERE: Error configuring application listener of class org.springframework.web.context.ContextLoaderListener 
java.lang.ClassNotFoundException: org.springframework.web.context.ContextLoaderListener 
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1672) 
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1517) 
    at org.apache.catalina.core.DefaultInstanceManager.loadClass(DefaultInstanceManager.java:415) 
    at org.apache.catalina.core.DefaultInstanceManager.loadClassMaybePrivileged(DefaultInstanceManager.java:397) 
    at org.apache.catalina.core.DefaultInstanceManager.newInstance(DefaultInstanceManager.java:118) 
    at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4287) 
    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:4816) 
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:140) 
    at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1028) 
    at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:773) 
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:140) 
    at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1028) 
    at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:278) 
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:140) 
    at org.apache.catalina.core.StandardService.startInternal(StandardService.java:429) 
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:140) 
    at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:662) 
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:140) 
    at org.apache.catalina.startup.Catalina.start(Catalina.java:592) 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) 
    at java.lang.reflect.Method.invoke(Unknown Source) 
    at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:290) 
    at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:418) 
Dec 7, 2011 9:27:59 PM org.apache.catalina.core.StandardContext listenerStart 
SEVERE: Skipped installing application listeners due to previous error(s) 
Dec 7, 2011 9:27:59 PM org.apache.catalina.core.StandardContext startInternal 

然後，當我嘗試調用從項目中，我得到以下錯誤Web服務：

Exception in thread "main" javax.xml.ws.WebServiceException: org.apache.cxf.service.factory.ServiceConstructionException: Failed to create service. 
    at org.apache.cxf.jaxws.ServiceImpl.<init>(ServiceImpl.java:149) 
    at org.apache.cxf.jaxws.spi.ProviderImpl.createServiceDelegate(ProviderImpl.java:90) 
    at javax.xml.ws.Service.<init>(Unknown Source) 
    at read_variable_value.ReadVariableNodeService1Service.<init>(ReadVariableNodeService1Service.java:50) 
    at FAS.Model2_FAS.asociere_valori(Model2_FAS.java:206) 
    at FAS.Model2_FAS.main(Model2_FAS.java:2596) 
Caused by: org.apache.cxf.service.factory.ServiceConstructionException: Failed to create service. 
    at org.apache.cxf.wsdl11.WSDLServiceFactory.<init>(WSDLServiceFactory.java:93) 
    at org.apache.cxf.jaxws.ServiceImpl.initializePorts(ServiceImpl.java:203) 
    at org.apache.cxf.jaxws.ServiceImpl.<init>(ServiceImpl.java:147) 
    ... 5 more 
Caused by: javax.wsdl.WSDLException: WSDLException: faultCode=PARSER_ERROR: Problem parsing 'http://localhost:8081/Prosys_Doctorat_Servicii_FAS_servicii/services/ReadVariableNodeService1Port?wsdl'.: java.io.FileNotFoundException: http://localhost:8081/Prosys_Doctorat_Servicii_FAS_servicii/services/ReadVariableNodeService1Port?wsdl 
    at com.ibm.wsdl.xml.WSDLReaderImpl.getDocument(Unknown Source) 
    at com.ibm.wsdl.xml.WSDLReaderImpl.readWSDL(Unknown Source) 
    at com.ibm.wsdl.xml.WSDLReaderImpl.readWSDL(Unknown Source) 
    at org.apache.cxf.wsdl11.WSDLManagerImpl.loadDefinition(WSDLManagerImpl.java:239) 
    at org.apache.cxf.wsdl11.WSDLManagerImpl.getDefinition(WSDLManagerImpl.java:186) 
    at org.apache.cxf.wsdl11.WSDLServiceFactory.<init>(WSDLServiceFactory.java:91) 
    ... 7 more 
Caused by: java.io.FileNotFoundException: http://localhost:8081/Prosys_Doctorat_Servicii_FAS_servicii/services/ReadVariableNodeService1Port?wsdl 
    at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source) 
    at com.sun.org.apache.xerces.internal.impl.XMLEntityManager.setupCurrentEntity(Unknown Source) 
    at com.sun.org.apache.xerces.internal.impl.XMLVersionDetector.determineDocVersion(Unknown Source) 
    at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source) 
    at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source) 
    at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(Unknown Source) 
    at com.sun.org.apache.xerces.internal.parsers.DOMParser.parse(Unknown Source) 
    at com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderImpl.parse(Unknown Source) 
    ... 13 more 

哪些原因會導致該錯誤只Web服務反覆使用後會出現？

http://i.stack.imgur.com/4mTNZ.jpg
http://i.stack.imgur.com/rYkQb.jpg

---

嗨，客戶端通過以下方式自動生成：

private static final QName SERVICE_NAME = new QName("http://read_variable/", "ReadVariableNodeServiceService"); 
URL wsdlURL = ReadVariableNodeServiceService.WSDL_LOCATION; 
ReadVariableNodeServiceService ss = new ReadVariableNodeServiceService(wsdlURL, SERVICE_NAME); 
SEIReadValue port = ss.getReadVariableNodeServicePort(); 
     { 
     System.out.println("Invoking getValue..."); 
     java.lang.String _getValue_arg0 = "Alina"; 
     java.lang.String _getValue_arg1 = "WorkspaceS1"; 
     try { 
      double _getValue__return = port.getValue(_getValue_arg0, _getValue_arg1); 
      System.out.println("getValue.result=" + _getValue__return); 
     ................ 

上週，我發現了一個有趣的文檔，它建議使用下列方法來調用Web服務：

ClassPathXmlApplicationContext context=new ClassPathXmlApplicationContext(new String[]{"read_variable/client3_beans.xml"}); 
    SEIReadValue port = (SEIReadValue) context.getBean("readvariableClient"); 
{ 
    System.out.println("Invoking getValue..."); 
    java.lang.String _getValue_arg0 = "Alina"; 
    java.lang.String _getValue_arg1 = "WorkspaceS1"; 
    try { 
     double _getValue__return = port.getValue(_getValue_arg0, _getValue_arg1); 
     System.out.println("getValue.result=" + _getValue__return); 
     ......... 

你覺得呢？這可能是我錯誤的原因嗎？

---

我很高興我幾乎找到了我的錯誤原因。但我是網絡服務的初學者，我並沒有完全理解你的信息。 我想指定我有一組基本/簡單的Web服務，然後基於這些Web服務創建了一個複雜的Web服務，我獲得每個簡單Web服務的上下文 以獲得其功能，並且正如你所說（按照我的理解），這不是正確的做法。

ClassPathXmlApplicationContext context=new ClassPathXmlApplicationContext(new String[]{"write_a_matrix/client2_beans.xml"}); 
SEIWriteMatrix port = (SEIWriteMatrix) context.getBean("write_a_matrix_Client"); 
........................................................... 
ClassPathXmlApplicationContext context_WV=new ClassPathXmlApplicationContext(new String[]{"write_value/client1_beans.xml"}); 
SEIWriteValue port_WV = (SEIWriteValue) context_WV.getBean("write_a_value_Client"); 
........................................................... 

我爲每個Web服務客戶端創建了一個client_beans xml文件。可以嗎？你能否給我提供一個如何調用Web服務的例子以及如何保存一個App上下文的方法？

要溝通要容易得多，因爲我已經看到了，我們被限制在一定數目的字符（對於新增評論部分）我會爲您提供我的電子郵件地址< berlindutza@yahoo.com>萬一。

非常感謝！

Answer 1

在這裏猜測：您可能重新創建CXF客戶端的每個請求，而不是創建一次，保持它作爲一個單身人士和每一個後續請求使用這一個實例。

理想情況下，您應該能夠使用webservice接口生成客戶端。如果你已經明確指定了一個wsdl，cxf將生成一個基於WSDL的代理，這正是你正在發生的事情。偶爾服務wsdl的服務失敗，並且你得到這個錯誤。

如果你正在使用Spring，你可以做一些沿着這些路線：

<bean id="clientFactory" class="org.apache.cxf.jaxws.JaxWsProxyFactoryBean"> 
    <property name="serviceClass" value="...wsInterface" /> 
    <property name="address" value="serviceURL" /> 
</bean> 

<bean id="client" class="...wsInterface" factory-bean="clientFactory" factory-method="create" />