Servlet.init() for servlet [Global] threw exception
出现以下的异常我们下异常的原因
Type 异常报告
消息 Servlet.init() for servlet [Global] threw exception
描述 服务器遇到一个意外的情况，阻止它完成请求。
Exception
javax.servlet.ServletException: Servlet.init() for servlet [Global] threw exception
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:526)
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:678)
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)
org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:367)
org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65)
org.apache.coyote.AbstractProtocolConnectionHandler.process(AbstractProtocol.java:860)org.apache.tomcat.util.net.NioEndpointConnectionHandler.process(AbstractProtocol.java:860) org.apache.tomcat.util.net.NioEndpointConnectionHandler.process(AbstractProtocol.java:860)org.apache.tomcat.util.net.NioEndpointSocketProcessor.doRun(NioEndpoint.java:1591)
org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
java.base/java.util.concurrent.ThreadPoolExecutorWorker.run(ThreadPoolExecutor.java:628)org.apache.tomcat.util.threads.TaskThreadWorker.run(ThreadPoolExecutor.java:628) org.apache.tomcat.util.threads.TaskThreadWorker.run(ThreadPoolExecutor.java:628)org.apache.tomcat.util.threads.TaskThreadWrappingRunnable.run(TaskThread.java:61)
java.base/java.lang.Thread.run(Thread.java:834)
Root Cause
org.springframework.beans.factory.BeanCreationException: Error creating bean with name ‘dataSource’ defined in class path resource [spring.xml]: Error setting property values; nested exception is org.springframework.beans.PropertyBatchUpdateException; nested PropertyAccessExceptions (1) are:
PropertyAccessException 1: org.springframework.beans.MethodInvocationException: Property ‘driverClassName’ threw exception; nested exception is java.lang.IllegalStateException: Could not load JDBC driver class [com.mysql.cj.jdbc.Driver]
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:1493)
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1197)
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:537)
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:475)
org.springframework.beans.factory.support.AbstractBeanFactory1.getObject(AbstractBeanFactory.java:304)org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228)org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:300)org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:195)org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:700)org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:760)org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:482)org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:139)org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:83)com.imooc.sm.global.DispatchServlet.init(DispatchServlet.java:25)javax.servlet.GenericServlet.init(GenericServlet.java:158)org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:526)org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:678)org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:367)org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65)org.apache.coyote.AbstractProtocol1.getObject(AbstractBeanFactory.java:304) org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228) org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:300) org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:195) org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:700) org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:760) org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:482) org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:139) org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:83) com.imooc.sm.global.DispatchServlet.init(DispatchServlet.java:25) javax.servlet.GenericServlet.init(GenericServlet.java:158) org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:526) org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:678) org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343) org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:367) org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65) org.apache.coyote.AbstractProtocol1.getObject(AbstractBeanFactory.java:304)org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228)org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:300)org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:195)org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:700)org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:760)org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:482)org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:139)org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:83)com.imooc.sm.global.DispatchServlet.init(DispatchServlet.java:25)javax.servlet.GenericServlet.init(GenericServlet.java:158)org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:526)org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:678)org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:367)org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65)org.apache.coyote.AbstractProtocolConnectionHandler.process(AbstractProtocol.java:860)
org.apache.tomcat.util.net.NioEndpointSocketProcessor.doRun(NioEndpoint.java:1591)org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)java.base/java.util.concurrent.ThreadPoolExecutorSocketProcessor.doRun(NioEndpoint.java:1591) org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) java.base/java.util.concurrent.ThreadPoolExecutorSocketProcessor.doRun(NioEndpoint.java:1591)org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)java.base/java.util.concurrent.ThreadPoolExecutorWorker.run(ThreadPoolExecutor.java:628)
org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
java.base/java.lang.Thread.run(Thread.java:834)
Root Cause
org.springframework.beans.PropertyBatchUpdateException; nested PropertyAccessExceptions (1) are:
PropertyAccessException 1: org.springframework.beans.MethodInvocationException: Property ‘driverClassName’ threw exception; nested exception is java.lang.IllegalStateException: Could not load JDBC driver class [com.mysql.cj.jdbc.Driver]
org.springframework.beans.AbstractPropertyAccessor.setPropertyValues(AbstractPropertyAccessor.java:108)
org.springframework.beans.AbstractPropertyAccessor.setPropertyValues(AbstractPropertyAccessor.java:62)
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:1489)
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1197)
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:537)
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:475)
org.springframework.beans.factory.support.AbstractBeanFactory1.getObject(AbstractBeanFactory.java:304)org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228)org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:300)org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:195)org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:700)org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:760)org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:482)org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:139)org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:83)com.imooc.sm.global.DispatchServlet.init(DispatchServlet.java:25)javax.servlet.GenericServlet.init(GenericServlet.java:158)org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:526)org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:678)org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:367)org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65)org.apache.coyote.AbstractProtocol1.getObject(AbstractBeanFactory.java:304) org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228) org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:300) org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:195) org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:700) org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:760) org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:482) org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:139) org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:83) com.imooc.sm.global.DispatchServlet.init(DispatchServlet.java:25) javax.servlet.GenericServlet.init(GenericServlet.java:158) org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:526) org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:678) org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343) org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:367) org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65) org.apache.coyote.AbstractProtocol1.getObject(AbstractBeanFactory.java:304)org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228)org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:300)org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:195)org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:700)org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:760)org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:482)org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:139)org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:83)com.imooc.sm.global.DispatchServlet.init(DispatchServlet.java:25)javax.servlet.GenericServlet.init(GenericServlet.java:158)org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:526)org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:678)org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:367)org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65)org.apache.coyote.AbstractProtocolConnectionHandler.process(AbstractProtocol.java:860)
org.apache.tomcat.util.net.NioEndpointSocketProcessor.doRun(NioEndpoint.java:1591)org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)java.base/java.util.concurrent.ThreadPoolExecutorSocketProcessor.doRun(NioEndpoint.java:1591) org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) java.base/java.util.concurrent.ThreadPoolExecutorSocketProcessor.doRun(NioEndpoint.java:1591)org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)java.base/java.util.concurrent.ThreadPoolExecutorWorker.run(ThreadPoolExecutor.java:628)
org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
java.base/java.lang.Thread.run(Thread.java:834)
):注意 主要问题的全部 stack 信息可以在 server logs 里查看
排除原因，下图出现异常
java.lang.IllegalStateException：无法加载JDBC驱动程序类[com.mysql.cj.jdbc.Driver]
出现这种异常的原因是因为Mysql版本的问题：
主要因为MySQL5用的驱动url是com.mysql.jdbc.Driver，MySQL6以后用的是com.mysql.cj.jdbc.Driver。版本不匹配便会报驱动类已过时的错误。
在代码中我们是用的是com.mysql.cj.jdbc.Driver,下面图片可以看到我的代码中导入的jar是Mysql5的驱动，所以应该使用的是com.mysql.jdbc.Driver，而不是com.mysql.cj.jdbc.Driver
解决方法：
ONE：替换Mysql驱动版本，改成Mysql6以上的版本，这里我改成的是Mysql8.0.17，因为我比较常用这个版本，需要注意的是，使用com.mysql.cj.jdbc.Driver， 需要指定时区serverTimezone，否则会报如下错误
TWO：替换数据库的语句com.mysql.cj.jdbc.Driver改成com.mysql.jdbc.Driver
上述两种方法都可以解决
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