部署axis2 Web服务时出现空指针异常

Question

我目前正在开始开发 Web 服务，在本地 tomcat 7.0 服务器上使用 eclipse IDE 和轴 2。

当我尝试部署服务时，我得到：

[ERROR] The encoSendInterface service, which is not valid, caused The following error occurred during schema generation: null org.apache.axis2.deployment.DeploymentException: The following error occurred during schema generation: null
at  org.apache.axis2.deployment.ServiceBuilder.populateService(ServiceBuilder.java:432)
at org.apache.axis2.deployment.repository.util.ArchiveReader.buildServiceGroup(ArchiveReader.java:101)
at org.apache.axis2.deployment.repository.util.ArchiveReader.processServiceGroup(ArchiveReader.java:178)
at org.apache.axis2.deployment.ServiceDeployer.deploy(ServiceDeployer.java:82)
at org.apache.axis2.deployment.repository.util.DeploymentFileData.deploy(DeploymentFileData.java:136)
at org.apache.axis2.deployment.DeploymentEngine.doDeploy(DeploymentEngine.java:813)
at org.apache.axis2.deployment.repository.util.WSInfoList.update(WSInfoList.java:144)
at org.apache.axis2.deployment.RepositoryListener.update(RepositoryListener.java:377)
at org.apache.axis2.deployment.RepositoryListener.checkServices(RepositoryListener.java:254)
at org.apache.axis2.deployment.DeploymentEngine.loadServices(DeploymentEngine.java:142)
at org.apache.axis2.deployment.WarBasedAxisConfigurator.loadServices(WarBasedAxisConfigurator.java:283)
at org.apache.axis2.context.ConfigurationContextFactory.createConfigurationContext(ConfigurationContextFactory.java:95)
at org.apache.axis2.transport.http.AxisServlet.initConfigContext(AxisServlet.java:584)
at org.apache.axis2.transport.http.AxisServlet.init(AxisServlet.java:454)
at org.apache.axis2.webapp.AxisAdminServlet.init(AxisAdminServlet.java:60)
at org.apache.catalina.core.StandardWrapper.initServlet(StandardWrapper.java:1266)
at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1185)
at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:1080)
at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:5015)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5302)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1566)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1556)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
at java.util.concurrent.FutureTask.run(FutureTask.java:166)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
at java.lang.Thread.run(Thread.java:722)
 Caused by: org.apache.axis2.deployment.DeploymentException: The following error occurred during schema generation: null
at org.apache.axis2.deployment.ServiceBuilder.populateService(ServiceBuilder.java:396)
... 27 more
Caused by: java.lang.NullPointerException
at org.apache.axis2.description.java2wsdl.DefaultSchemaGenerator.generateSchema(DefaultSchemaGenerator.java:606)
at org.apache.axis2.description.java2wsdl.DefaultSchemaGenerator.generateSchemaTypeforNameCommon(DefaultSchemaGenerator.java:1092)
at org.apache.axis2.description.java2wsdl.DefaultSchemaGenerator.generateSchemaForType(DefaultSchemaGenerator.java:996)
at org.apache.axis2.description.java2wsdl.DefaultSchemaGenerator.processMethods(DefaultSchemaGenerator.java:385)
at org.apache.axis2.description.java2wsdl.DefaultSchemaGenerator.generateSchema(DefaultSchemaGenerator.java:273)
at org.apache.axis2.deployment.util.Utils.fillAxisService(Utils.java:468)
at org.apache.axis2.deployment.ServiceBuilder.populateService(ServiceBuilder.java:388)
... 27 more
[INFO] org.apache.axis2.deployment.DeploymentException: The following error occurred during schema generation: null

有什么办法可以查出，是什么原因导致了这个异常？

我的 WS 的当前版本不读取任何配置文件。在构建 Web 服务时，是否有任何我不能使用的库，这可能会导致整个节目崩溃？

问候， 路易吉

Answer 1

从 axis2 1.5.1 升级到 1.6.2 后，我遇到了相同（或非常相似）的问题。

将“@WebMethod(exclude = true)”添加到非 webmethod 公共方法为我修复了它。

Answer 2

如果这对任何人都有帮助，我通过将@WebMethod(exclude = true) 添加到我在服务类上的一些设置器（用于依赖注入）来解决这个问题。

根据JAX-WS Guide

如果没有指定@WebMethod注解，所有公共方法都是 暴露包括继承的方法，但方法除外 继承自 java.lang.Object。的排除参数 @WebMethod 注解可以用来控制哪些方法是 暴露。

Answer 3

我已经解决了这个问题。 Ws 的公共方法之一有一个参数，其名称与类属性之一完全相同。虽然这适用于常规 (javaSE) 开发，但它似乎确实会在 Web 服务中造成问题。