java – 编写一个jar文件实用程序
我正在编写一个实用程序jar文件,以便共享到多个项目中.基本上它处理建立数据库连接并进行计算,然后返回值.其他项目将导入我的jar文件并调用我的函数.
现在我有问题当我试图调用jar文件中的一个函数.在eclipse中没有编译错误但是因为我在app服务器测试它我收到此错误 22:16:35,177 DEBUG ExecutionContext:187 - Transitioning to lifecycle stage RequestComplete 22:16:35,178 WARN DefaultExceptionHandler:94 - Unhandled exception caught by the Stripes default exception handler. net.sourceforge.stripes.exception.StripesServletException: ActionBean execution threw an exception. at net.sourceforge.stripes.controller.DispatcherServlet.service(DispatcherServlet.java:183) at javax.servlet.http.HttpServlet.service(HttpServlet.java:722) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:304) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) at net.sourceforge.stripes.controller.StripesFilter.doFilter(StripesFilter.java:247) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:224) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:185) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:151) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100) at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:929) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:405) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:269) at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:515) at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:302) at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) at java.lang.Thread.run(Unknown Source) Caused by: java.lang.NoClassDefFoundError: com/my/rnd/test/utils/SimplePing at com.app.action.JbpmProcessInstanceActionBean.testTrigger(JbpmProcessInstanceActionBean.java:83) at com.app.action.JbpmProcessInstanceActionBean.loadProcInstanceList(JbpmProcessInstanceActionBean.java:72) 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) 我使用eclipse导出jar文件,这是SimplePing的示例函数 public class SimplePing { /** * @param args */ public void testSimplePing() { // TODO Auto-generated method stub System.out.println("This is a simple ping ."); } } 似乎appserver无法找到我的类,即使它存在于jar文件中.欢迎任何帮助 解决方法
如果仔细查看错误堆栈,可以看到以下内容:
引起:java.lang.NoClassDefFoundError:com / my / rnd / test / utils / SimplePing 当您具有以下某个条件时,这是一个常见错误: >你的lib中缺少一个jar … 最终所有连接到同一个问题:一个丢失的jar(JDK或第三方相关的jar)您还可以使用maven插件进行eclipse,它将管理您当前项目的可靠性以及项目所需的可玩项,如果您喜欢Maven的话. (编辑:李大同) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |