【发布时间】：2013-10-24 12:49:41
【问题描述】：
我目前正在尝试将 Web 服务合并到我的应用程序中。我无法访问 Web 服务本身，但可以通过 jar 文件访问。下面是访问网络服务的代码：
import java.util.List;
import java.io.Serializable;
import java.lang.String;
import com.zf.fileviewing.connection.FVConnectData;
import com.zf.fileviewing.connection.FVConnector;
import java.net.URL;
public class CheckOutAxalant implements Serializable
{
private static final long serialVersionUID = 1L;
public List<String> CheckoutAxalant(String docCid)
{
List<String> fileNames;
String userId="";
FVConnectData fvData = new FVConnectData();
fvData.setWsKeyword("");
fvData.setWsUrl("");
FVConnector con = new FVConnector(fvData);
// get all filenames of document
try
{
fileNames = con.getAllFileNames(docCid, userId);
for (String value : fileNames)
{
System.out.println("filename: " + value);
}
return fileNames;
}
catch (Exception e)
{
System.out.println("ERROR: " + e.getMessage());
e.printStackTrace();
return null;
}
}
错误发生就行了：
FVConnectData fvData = new FVConnectData();
完整的堆栈跟踪如下：
java.lang.NoClassDefFoundError: com/zf/fileviewing/connection/FVConnectData
at com.zf.proceed.service.checkout.CheckOutAxalant.<init>(CheckOutAxalant.java:15)
at com.zf.proceed.gui.ConversionsCreateNewConversion.<init>(ConversionsCreateNewConversion.java:41)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
at java.lang.reflect.Constructor.newInstance(Unknown Source)
at java.lang.Class.newInstance0(Unknown Source)
at java.lang.Class.newInstance(Unknown Source)
at com.sun.faces.mgbean.BeanBuilder.newBeanInstance(BeanBuilder.java:188)
at com.sun.faces.mgbean.BeanBuilder.build(BeanBuilder.java:102)
at com.sun.faces.mgbean.BeanManager.createAndPush(BeanManager.java:409)
at com.sun.faces.mgbean.BeanManager.create(BeanManager.java:269)
at com.sun.faces.el.ManagedBeanELResolver.resolveBean(ManagedBeanELResolver.java:244)
at com.sun.faces.el.ManagedBeanELResolver.getValue(ManagedBeanELResolver.java:116)
at com.sun.faces.el.DemuxCompositeELResolver._getValue(DemuxCompositeELResolver.java:176)
at com.sun.faces.el.DemuxCompositeELResolver.getValue(DemuxCompositeELResolver.java:203)
at org.apache.el.parser.AstIdentifier.getValue(AstIdentifier.java:72)
at org.apache.el.parser.AstValue.getValue(AstValue.java:161)
at org.apache.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:185)
at com.sun.faces.facelets.el.TagValueExpression.getValue(TagValueExpression.java:109)
at javax.faces.component.ComponentStateHelper.eval(ComponentStateHelper.java:194)
at javax.faces.component.ComponentStateHelper.eval(ComponentStateHelper.java:182)
at javax.faces.component.UISelectItems.getValue(UISelectItems.java:129)
at org.primefaces.renderkit.InputRenderer.getSelectItems(InputRenderer.java:53)
at org.primefaces.component.selectonemenu.SelectOneMenuRenderer.encodeMarkup(SelectOneMenuRenderer.java:71)
at org.primefaces.component.selectonemenu.SelectOneMenuRenderer.encodeEnd(SelectOneMenuRenderer.java:65)
at javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:875)
at com.sun.faces.renderkit.html_basic.HtmlBasicRenderer.encodeRecursive(HtmlBasicRenderer.java:312)
at com.sun.faces.renderkit.html_basic.GridRenderer.renderRow(GridRenderer.java:185)
at com.sun.faces.renderkit.html_basic.GridRenderer.encodeChildren(GridRenderer.java:129)
at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:845)
at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1779)
at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1782)
at org.primefaces.component.wizard.WizardRenderer.encodeCurrentStep(WizardRenderer.java:174)
at org.primefaces.component.wizard.WizardRenderer.encodeContent(WizardRenderer.java:204)
at org.primefaces.component.wizard.WizardRenderer.encodeMarkup(WizardRenderer.java:159)
at org.primefaces.component.wizard.WizardRenderer.encodeEnd(WizardRenderer.java:62)
at javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:875)
at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1786)
at javax.faces.render.Renderer.encodeChildren(Renderer.java:168)
at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:845)
at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1779)
at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1782)
at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1782)
at com.sun.faces.application.view.FaceletViewHandlingStrategy.renderView(FaceletViewHandlingStrategy.java:424)
at com.sun.faces.application.view.MultiViewHandler.renderView(MultiViewHandler.java:124)
at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:121)
at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:139)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:594)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1023)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
由于无法访问网络服务，因此我非常坚持。
另外仅供参考，如果我运行相同的代码但将其调整为普通的 Java 应用程序，它就可以正常工作。
【问题讨论】：
-
你是部署在某个应用服务器上吗？如果您使用的是 maven，则需要在本地 repo 中安装。
-
我正在使用 maven 和 tomcat。老实说，我的公司让我使用 maven，但我没有 100% 了解它是什么，为什么需要它以及如何使用它。你能解释一下
you need to install at your local repo的意思吗 -
我相信我已经通过将 Jar 文件添加到 tomcat 的类路径以及项目类路径中解决了这个问题。我不知道为什么会发生这种情况，因为其他 jar 文件没有在 TomCat 的类路径中就可以正常工作。
-
如果你使用 maven 你有一个本地 repo，调用 .m2 你有你需要的所有 jar，所以当你导入一个 jar 时，如果你不做 mvn install，那个 jar你不需要在你的本地仓库。
标签： java web-services maven tomcat classloader