Eclipse中tomcat启动时提示java.lang.ClassNotFoundException: XXX class

博主在工作中遇到Eclipse里Tomcat启动提示java.lang.ClassNotFoundException的问题,试过将含该类的jar包加入工程java build path无法解决。经分析,需在tomcat的JVM settings中添加该jar包到classpath,给出了具体操作步骤,还指出指定directory无效待后续研究。

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之前在工作中发现有个比较头痛的问题,搞了半天都解决不了,这个问题的状态就是Eclipse中tomcat启动时提示java.lang.ClassNotFoundException: XXX class,我试过将含有XXX类的jar包加入工程的java build path等方法,都无法解决,也因此头痛了很久。

分析了一下,这种情况是由于tomcat在启动的时候需要加载XXX类却没有在classpath中发现该类

我们所需要做的就是在tomcat的JVM settings中添加这个含有该类的jar包到classpath中去即可:

eclipse->window->preference->Tomcat->JVM settings->classpath->添加缺少的类的jar包->OK

然后tomcat即可运行

有个问题就是,添加条目的时候指定jar/zip包可以work 但是如果只是指定directory没用

这个问题等以后搞清楚再来更新吧

转载于:https://www.cnblogs.com/ericsun/archive/2012/02/14/2350626.html

"D:\Program Files\Java\bin\java.exe" "-javaagent:D:\IntelliJ IDEA 2024.1.4\lib\idea_rt.jar=54488:D:\IntelliJ IDEA 2024.1.4\bin" -Dfile.encoding=UTF-8 -Dsun.stdout.encoding=UTF-8 -Dsun.stderr.encoding=UTF-8 -classpath "D:\IntelliJ IDEA 2024.1.4\JAVA-code\studentManage\out\production\studentManage" studentManage.MainFrame java.lang.ClassNotFoundException: com.mysql.cj.jdbc.Driver at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:641) at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:188) at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:525) at java.base/java.lang.Class.forName0(Native Method) at java.base/java.lang.Class.forName(Class.java:413) at java.base/java.lang.Class.forName(Class.java:404) at studentManage.SQLHelp.<clinit>(SQLHelp.java:26) at studentManage.QueryFrame$2.actionPerformed(QueryFrame.java:132) at java.desktop/javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1972) at java.desktop/javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2314) at java.desktop/javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:407) at java.desktop/javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:262) at java.desktop/javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:279) at java.desktop/java.awt.Component.processMouseEvent(Component.java:6621) at java.desktop/javax.swing.JComponent.processMouseEvent(JComponent.java:3398) at java.desktop/java.awt.Component.processEvent(Component.java:6386) at java.desktop/java.awt.Container.processEvent(Container.java:2266) at java.desktop/java.awt.Component.dispatchEventImpl(Component.java:4996) at java.desktop/java.awt.Container.dispatchEventImpl(Container.java:2324) at java.desktop/java.awt.Component.dispatchEvent(Component.java:4828) at java.desktop/java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4948) at j
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07-02
20-Mar-2025 22:42:49.055 严重 [RMI TCP Connection(5)-127.0.0.1] org.apache.catalina.core.StandardContext.listenerStart 配置应用程序监听器[org.springframework.web.context.ContextLoaderListener]错误 java.lang.ClassNotFoundException: org.springframework.web.context.ContextLoaderListener at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1308) at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1120) at org.apache.catalina.core.DefaultInstanceManager.loadClass(DefaultInstanceManager.java:488) at org.apache.catalina.core.DefaultInstanceManager.loadClassMaybePrivileged(DefaultInstanceManager.java:470) at org.apache.catalina.core.DefaultInstanceManager.newInstance(DefaultInstanceManager.java:142) at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:3934) at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:4448) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:164) at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:599) at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:571) at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:603) at org.apache.catalina.startup.HostConfig.manageApp(HostConfig.java:1751) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.apache.tomcat.util.modeler.BaseModelMBean.invoke(BaseModelMBean.java:264) at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:819) at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:801) at org.apache.catalina.mbeans.MBeanFactory.createStandardContext(MBeanFactory.java:453) at org.apache.catalina.mbeans.MBeanFactory.createStandardContext(MBeanFactory.java:407) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.apache.tomcat.util.modeler.BaseModelMBean.invoke(BaseModelMBean.java:264) at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:819) at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:801) at com.sun.jmx.remote.security.MBeanServerAccessController.invoke(MBeanServerAccessController.java:468) at javax.management.remote.rmi.RMIConnectionImpl.doOperation(RMIConnectionImpl.java:1468)解释一下
03-21
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