硅谷课堂项目BUG记录【01】

一、错误描述：

使用EasyExcel，在执行写操作时报错，并未将查询到的数据写到excel中。

二、控制台报错信息

com.alibaba.excel.exception.ExcelGenerateException: java.lang.ExceptionInInitializerErrorat com.alibaba.excel.write.ExcelBuilderImpl.addContent(ExcelBuilderImpl.java:64)at com.alibaba.excel.ExcelWriter.write(ExcelWriter.java:161)at com.alibaba.excel.ExcelWriter.write(ExcelWriter.java:146)at com.alibaba.excel.write.builder.ExcelWriterSheetBuilder.doWrite(ExcelWriterSheetBuilder.java:179)at cn.cc.ggkt.vod.service.impl.SubjectServiceImpl.exportData(SubjectServiceImpl.java:74)at cn.cc.ggkt.vod.service.impl.SubjectServiceImpl$$FastClassBySpringCGLIB$$7317bea1.invoke(<generated>)at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:218)at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:685)at cn.cc.ggkt.vod.service.impl.SubjectServiceImpl$$EnhancerBySpringCGLIB$$c6b66a85.exportData(<generated>)at cn.cc.ggkt.vod.controller.SubjectController.exportData(SubjectController.java:44)at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:78)at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)at java.base/java.lang.reflect.Method.invoke(Method.java:567)at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:190)at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:138)at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:106)at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:888)at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:793)at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1040)at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:943)at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006)at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:898)at javax.servlet.http.HttpServlet.service(HttpServlet.java:634)at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883)at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100)at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93)at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201)at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202)at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:526)at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139)at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408)at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:861)at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1579)at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1130)at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630)at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)at java.base/java.lang.Thread.run(Thread.java:831)
Caused by: java.lang.ExceptionInInitializerErrorat net.sf.cglib.core.KeyFactory$Generator.generateClass(KeyFactory.java:166)at net.sf.cglib.core.DefaultGeneratorStrategy.generate(DefaultGeneratorStrategy.java:25)at net.sf.cglib.core.AbstractClassGenerator.create(AbstractClassGenerator.java:216)at net.sf.cglib.core.KeyFactory$Generator.create(KeyFactory.java:144)at net.sf.cglib.core.KeyFactory.create(KeyFactory.java:116)at net.sf.cglib.core.KeyFactory.create(KeyFactory.java:108)at net.sf.cglib.beans.BeanMap$Generator.<clinit>(BeanMap.java:64)at net.sf.cglib.beans.BeanMap.create(BeanMap.java:56)at com.alibaba.excel.write.executor.ExcelWriteAddExecutor.addJavaObjectToExcel(ExcelWriteAddExecutor.java:114)at com.alibaba.excel.write.executor.ExcelWriteAddExecutor.addOneRowOfDataToExcel(ExcelWriteAddExecutor.java:65)at com.alibaba.excel.write.executor.ExcelWriteAddExecutor.add(ExcelWriteAddExecutor.java:51)at com.alibaba.excel.write.ExcelBuilderImpl.addContent(ExcelBuilderImpl.java:58)... 59 more
Caused by: java.lang.reflect.InaccessibleObjectException: Unable to make protected final java.lang.Class java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int,java.security.ProtectionDomain) throws java.lang.ClassFormatError accessible: module java.base does not "opens java.lang" to unnamed module @1c93084cat java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:357)at java.base/java.lang.reflect.AccessibleObject.checkCanSetAccessible(AccessibleObject.java:297)at java.base/java.lang.reflect.Method.checkCanSetAccessible(Method.java:199)at java.base/java.lang.reflect.Method.setAccessible(Method.java:193)at net.sf.cglib.core.ReflectUtils$2.run(ReflectUtils.java:56)at java.base/java.security.AccessController.doPrivileged(AccessController.java:312)at net.sf.cglib.core.ReflectUtils.<clinit>(ReflectUtils.java:46)... 71 more

三、改错

核心在于Cause by后面的信息，经排查是由于高版本的JDK对反射进行了一些功能上的限制，从而引发问题，这里可以降低JDK的版本或者采用一个更简单的方案，对JVM加上下面的参数设置就好：

--add-opens java.base/java.lang=ALL-UNNAMED

我使用的IDEA版本为2021.2，操作步骤如下：

重启项目后，功能正常使用。

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EasyExcel报错com.alibaba.excel.exception.ExcelGenerateException: java.lang.ExceptionInInitializerError

硅谷课堂项目BUG记录【01】

一、错误描述：

二、控制台报错信息

三、改错

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