使用了这个方法https://www.jfinal.com/share/1357
但每次修改用Ctrl+S保存后都会报错停止，请问是什么问题？
Loading changes ......
五月 10, 2021 2:15:12 下午 io.undertow.Undertow stop
INFO: stopping server: Undertow - 2.0.28.Final
Disconnected from the target VM, address: '127.0.0.1:58895', transport: 'socket'
Exception in thread "HotSwapWatcher" java.lang.RuntimeException: java.lang.NoClassDefFoundError: com/demo/controller/HelloController
at com.jfinal.server.undertow.hotswap.HotSwapWatcher.run(HotSwapWatcher.java:93)
Caused by: java.lang.NoClassDefFoundError: com/demo/controller/HelloController
at com.demo.config.DemoConfig.configRoute(DemoConfig.java:16)
at com.jfinal.core.Config.configJFinal(Config.java:57)
at com.jfinal.core.JFinal.init(JFinal.java:61)
at com.jfinal.core.JFinalFilter.init(JFinalFilter.java:64)
at io.undertow.servlet.core.LifecyleInterceptorInvocation.proceed(LifecyleInterceptorInvocation.java:111)
at io.undertow.servlet.core.ManagedFilter.createFilter(ManagedFilter.java:80)
at io.undertow.servlet.core.DeploymentManagerImpl$2.call(DeploymentManagerImpl.java:591)
at io.undertow.servlet.core.DeploymentManagerImpl$2.call(DeploymentManagerImpl.java:556)
at io.undertow.servlet.core.ServletRequestContextThreadSetupAction$1.call(ServletRequestContextThreadSetupAction.java:42)
at io.undertow.servlet.core.ContextClassLoaderSetupAction$1.call(ContextClassLoaderSetupAction.java:43)
at io.undertow.servlet.core.DeploymentManagerImpl.start(DeploymentManagerImpl.java:598)
at com.jfinal.server.undertow.UndertowServer.configHttp(UndertowServer.java:284)
at com.jfinal.server.undertow.UndertowServer.doStart(UndertowServer.java:262)
at com.jfinal.server.undertow.UndertowServer.restart(UndertowServer.java:425)
at com.jfinal.server.undertow.hotswap.HotSwapWatcher.doRun(HotSwapWatcher.java:133)
at com.jfinal.server.undertow.hotswap.HotSwapWatcher.run(HotSwapWatcher.java:91)
Caused by: java.lang.ClassNotFoundException: com.demo.controller.HelloController
at java.net.URLClassLoader$1.run(URLClassLoader.java:372)
at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:360)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at com.jfinal.server.undertow.hotswap.HotSwapClassLoader.loadClass(HotSwapClassLoader.java:106)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 16 more
Process finished with exit code 0
