你好@CrawlScript，请问我将自动探测URL的代码复制下来不能运行，报No default constructor found的错误，应该怎么解决？

发布于 2022-01-04 21:44:56 字数 8890 浏览 890 评论 1

@CrawlScript 你好，想跟你请教个问题：

我将自动探测URL的代码复制下来不能运行，报No default constructor found的错误

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'autoNewsCrawler' defined in file [D:sourcehuangkeyuan-kygltargetclassescomhkykyglAutoNewsCrawler.class]: Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.hky.kygl.AutoNewsCrawler]: No default constructor found; nested exception is java.lang.NoSuchMethodException: com.hky.kygl.AutoNewsCrawler.<init>()
   at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:1093)
   at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1038)
   at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:504)
   at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:476)
   at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:302)
   at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
   at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:298)
   at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193)
   at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:762)
   at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:757)
   at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:480)
   at org.springframework.web.servlet.FrameworkServlet.configureAndRefreshWebApplicationContext(FrameworkServlet.java:663)
   at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:629)
   at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:677)
   at org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:548)
   at org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:489)
   at org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:136)
   at javax.servlet.GenericServlet.init(GenericServlet.java:241)
   at org.mortbay.jetty.servlet.ServletHolder.initServlet(ServletHolder.java:440)
   at org.mortbay.jetty.servlet.ServletHolder.doStart(ServletHolder.java:263)
   at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
   at org.mortbay.jetty.servlet.ServletHandler.initialize(ServletHandler.java:685)
   at org.mortbay.jetty.servlet.Context.startContext(Context.java:140)
   at org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1250)
   at org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java:517)
   at org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:467)
   at org.mortbay.jetty.plugin.Jetty6PluginWebAppContext.doStart(Jetty6PluginWebAppContext.java:115)
   at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
   at org.mortbay.jetty.handler.HandlerCollection.doStart(HandlerCollection.java:152)
   at org.mortbay.jetty.handler.ContextHandlerCollection.doStart(ContextHandlerCollection.java:156)
   at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
   at org.mortbay.jetty.handler.HandlerCollection.doStart(HandlerCollection.java:152)
   at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
   at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130)
   at org.mortbay.jetty.Server.doStart(Server.java:224)
   at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
   at org.mortbay.jetty.plugin.Jetty6PluginServer.start(Jetty6PluginServer.java:132)
   at org.mortbay.jetty.plugin.AbstractJettyMojo.startJetty(AbstractJettyMojo.java:441)
   at org.mortbay.jetty.plugin.AbstractJettyMojo.execute(AbstractJettyMojo.java:383)
   at org.mortbay.jetty.plugin.AbstractJettyRunMojo.execute(AbstractJettyRunMojo.java:210)
   at org.mortbay.jetty.plugin.Jetty6RunMojo.execute(Jetty6RunMojo.java:184)
   at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:134)
   at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:207)
   at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)
   at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)
   at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:116)
   at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:80)
   at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build(SingleThreadedBuilder.java:51)
   at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:128)
   at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:307)
   at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:193)
   at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:106)
   at org.apache.maven.cli.MavenCli.execute(MavenCli.java:863)
   at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:288)
   at org.apache.maven.cli.MavenCli.main(MavenCli.java:199)
   at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
   at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
   at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
   at java.lang.reflect.Method.invoke(Method.java:606)
   at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:289)
   at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:229)
   at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:415)
   at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:356)
   at org.codehaus.classworlds.Launcher.main(Launcher.java:47)
Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.hky.kygl.AutoNewsCrawler]: No default constructor found; nested exception is java.lang.NoSuchMethodException: com.hky.kygl.AutoNewsCrawler.<init>()
   at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:85)
   at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:1086)
   ... 63 more
Caused by: java.lang.NoSuchMethodException: com.hky.kygl.AutoNewsCrawler.<init>()
   at java.lang.Class.getConstructor0(Class.java:2892)
   at java.lang.Class.getDeclaredConstructor(Class.java:2058)
   at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:80)
   ... 64 more