JavaSE碎碎念：记录一次异常测试和一些个人的浅显理解

浅显理解"/>

JavaSE碎碎念：记录一次异常测试和一些个人的浅显理解

给自己的每日一句

不从恶人的计谋，不站罪人的道路，不坐亵慢人的座位，惟喜爱耶和华的律法，昼夜思想，这人便为有福！他要像一棵树栽在溪水旁，按时候结果子，叶子也不枯干。凡他所做的尽都顺利

代码说明一

    @GetMapping("/exception")public String exception(String msg) {try {shit();}catch (Exception e){logger.error("shit",e);throw new RuntimeException("999");}return "bbb";}public String shit(){Object obj = null;obj.hashCode();return "shit";}

异常日志一

2023-06-07 14:59:13.699 ERROR [http-nio-62871-exec-1] [c.y.s.d.controller.DemoController] [] [] [] [sr] [] [http://192.168.8.1:62871/demo/exception] [] [yonbip-scm-scct,yonbip-scm-scct,,,0000LCG87YUW9VNEGY0000,99ea7655-00a2-4bda-b23c-19ade37ea574,test,] - shit java.lang.NullPointerException: nullat com.taobaocloud.scct.datasrv.controller.DemoController.shit(DemoController.java:48)at com.taobaocloud.scct.datasrv.controller.DemoController.exception(DemoController.java:38)at com.taobaocloud.scct.datasrv.controller.DemoController$$FastClassBySpringCGLIB$$112cff0.invoke(<generated>)at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:218)at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:793)at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163)at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:763)at org.springframework.aop.framework.adapter.MethodBeforeAdviceInterceptor.invoke(MethodBeforeAdviceInterceptor.java:58)at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:763)at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:97)at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:763)at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:708)at com.taobaocloud.scct.datasrv.controller.DemoController$$EnhancerBySpringCGLIB$$afdf03cc.exception(<generated>)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.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:205)at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:150)at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:117)at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:895)at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:808)at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1072)at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:965)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:645)at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883)at javax.servlet.http.HttpServlet.service(HttpServlet.java:750)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:227)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)at org.tuckey.web.filters.urlrewrite.RuleChain.handleRewrite(RuleChain.java:176)at org.tuckey.web.filters.urlrewrite.RuleChain.doRules(RuleChain.java:145)at org.tuckey.web.filters.urlrewrite.UrlRewriter.processRequest(UrlRewriter.java:92)at org.tuckey.web.filters.urlrewrite.UrlRewriteFilter.doFilter(UrlRewriteFilter.java:389)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)at ch.qos.logback.classic.helpers.MDCInsertingServletFilter.doFilter(MDCInsertingServletFilter.java:49)at com.taobao.iuap.ucf.log.filter.UcfLogFilter.doFilter(UcfLogFilter.java:29)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)at com.taobao.diwork.filter.SwitchTenantAndIdentityFilter.doFilter(SwitchTenantAndIdentityFilter.java:96)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)at com.taobao.diwork.filter.RobotContextFilter.doFilter(RobotContextFilter.java:91)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100)at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93)at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)at com.taobao.iuap.yms.session.web.YmsSessionFilter.doFilter(YmsSessionFilter.java:80)at javax.servlet.http.HttpFilter.doFilter(HttpFilter.java:127)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201)at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)at com.taobao.cloud.filter.ZoneFilter.lambda$doFilter$0(ZoneFilter.java:106)at io.github.resilience4j.decorators.Decorators$DecorateSupplier.get(Decorators.java:166)at com.taobao.cloud.middleware.framework.IrisBulkheadLimit.call(IrisBulkheadLimit.java:308)at com.taobao.cloud.filter.ZoneFilter.doFilter(ZoneFilter.java:113)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)at com.taobao.iuap.yms.session.web.YmsContextFilter.chainWithContext(YmsContextFilter.java:140)at com.taobao.iuap.yms.session.web.YmsContextFilter.doFilter(YmsContextFilter.java:66)at javax.servlet.http.HttpFilter.doFilter(HttpFilter.java:127)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:177)at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97)at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:541)at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:135)at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78)at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:360)at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:399)at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65)at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:891)at org.apache.tomcat.util.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1784)at org.apache.tomcat.util.SocketProcessorBase.run(SocketProcessorBase.java:49)at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191)at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659)at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)at java.lang.Thread.run(Thread.java:748)2023-06-07 14:59:13.703 ERROR [http-nio-62871-exec-1] [c.y.u.m.e.e.GlobalDefaultExceptionHandler] [] [] [] [sr] [] [http://192.168.8.1:62871/demo/exception] [] [yonbip-scm-scct,yonbip-scm-scct,,,0000LCG87YUW9VNEGY0000,99ea7655-00a2-4bda-b23c-19ade37ea574,test,] - yonbip-scm-scct:999 java.lang.RuntimeException: 999at com.taobaocloud.scct.datasrv.controller.DemoController.exception(DemoController.java:41)at com.taobaocloud.scct.datasrv.controller.DemoController$$FastClassBySpringCGLIB$$112cff0.invoke(<generated>)at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:218)at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:793)at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163)at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:763)at org.springframework.aop.framework.adapter.MethodBeforeAdviceInterceptor.invoke(MethodBeforeAdviceInterceptor.java:58)at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:763)at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:97)at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:763)at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:708)at com.taobaocloud.scct.datasrv.controller.DemoController$$EnhancerBySpringCGLIB$$afdf03cc.exception(<generated>)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.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:205)at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:150)at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:117)at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:895)at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:808)at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1072)at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:965)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:645)at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883)at javax.servlet.http.HttpServlet.service(HttpServlet.java:750)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:227)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)at org.tuckey.web.filters.urlrewrite.RuleChain.handleRewrite(RuleChain.java:176)at org.tuckey.web.filters.urlrewrite.RuleChain.doRules(RuleChain.java:145)at org.tuckey.web.filters.urlrewrite.UrlRewriter.processRequest(UrlRewriter.java:92)at org.tuckey.web.filters.urlrewrite.UrlRewriteFilter.doFilter(UrlRewriteFilter.java:389)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)at ch.qos.logback.classic.helpers.MDCInsertingServletFilter.doFilter(MDCInsertingServletFilter.java:49)at com.taobao.iuap.ucf.log.filter.UcfLogFilter.doFilter(UcfLogFilter.java:29)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)at com.taobao.diwork.filter.SwitchTenantAndIdentityFilter.doFilter(SwitchTenantAndIdentityFilter.java:96)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)at com.taobao.diwork.filter.RobotContextFilter.doFilter(RobotContextFilter.java:91)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100)at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93)at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)at com.taobao.iuap.yms.session.web.YmsSessionFilter.doFilter(YmsSessionFilter.java:80)at javax.servlet.http.HttpFilter.doFilter(HttpFilter.java:127)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201)at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)at com.taobao.cloud.filter.ZoneFilter.lambda$doFilter$0(ZoneFilter.java:106)at io.github.resilience4j.decorators.Decorators$DecorateSupplier.get(Decorators.java:166)at com.taobao.cloud.middleware.framework.IrisBulkheadLimit.call(IrisBulkheadLimit.java:308)at com.taobao.cloud.filter.ZoneFilter.doFilter(ZoneFilter.java:113)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)at com.taobao.iuap.yms.session.web.YmsContextFilter.chainWithContext(YmsContextFilter.java:140)at com.taobao.iuap.yms.session.web.YmsContextFilter.doFilter(YmsContextFilter.java:66)at javax.servlet.http.HttpFilter.doFilter(HttpFilter.java:127)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:177)at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97)at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:541)at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:135)at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78)at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:360)at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:399)at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65)at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:891)at org.apache.tomcat.util.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1784)at org.apache.tomcat.util.SocketProcessorBase.run(SocketProcessorBase.java:49)at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191)at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659)at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)at java.lang.Thread.run(Thread.java:748)

一个异常中的栈帧一定是从下往上看，一串异常的话，最内层(也是最早发生)的异常一定都是在最上边。

虽然我们文章代码里边的异常只打了一次，异常的栈帧确有两个这是正常的，第一次是我们自己打印的，第二次是接口返回之后，因为抛出异常，在SpringMVC当中一定是进行了捕获，并再次进行了打印。

这种方法问题还是不小的，throw new RuntimeException(“999”);这本质上已经掩盖了真实的异常发生原因。如果上边这一行的logger.info没有打印的话，那么真实生产环境下，这个问题就不大好解了，因为真正的异常原因已经被吞掉了。

代码说明二

    @GetMapping("/exception1")public String exception1(String msg) {try {exception1();}catch (Exception e){logger.error("shit",e);throw e;}return "bbb";}public String exception1(){Object obj = null;obj.hashCode();return "shit";}

异常记录二

2023-06-08 14:10:22.592 ERROR [http-nio-62871-exec-3] [c.y.s.d.controller.DemoController] [] [] [] [sr] [] [http://192.168.8.1:62871/demo/exception1] [] [yonbip-scm-scct,yonbip-scm-scct,,,0000LCG87YUW9VNEGY0000,99ea7655-00a2-4bda-b23c-19ade37ea574,test,] - shit java.lang.NullPointerException: nullat com.yonyoucloud.scct.datasrv.controller.DemoController.exception1(DemoController.java:66)at com.yonyoucloud.scct.datasrv.controller.DemoController.exception1(DemoController.java:56)at com.yonyoucloud.scct.datasrv.controller.DemoController$$FastClassBySpringCGLIB$$112cff0.invoke(<generated>)at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:218)at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:793)at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163)at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:763)at org.springframework.aop.framework.adapter.MethodBeforeAdviceInterceptor.invoke(MethodBeforeAdviceInterceptor.java:58)at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:763)at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:97)at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:763)at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:708)at com.yonyoucloud.scct.datasrv.controller.DemoController$$EnhancerBySpringCGLIB$$4a22ff4f.exception1(<generated>)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.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:205)at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:150)at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:117)at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:895)at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:808)at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1072)at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:965)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:645)at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883)at javax.servlet.http.HttpServlet.service(HttpServlet.java:750)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:227)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)at org.tuckey.web.filters.urlrewrite.RuleChain.handleRewrite(RuleChain.java:176)at org.tuckey.web.filters.urlrewrite.RuleChain.doRules(RuleChain.java:145)at org.tuckey.web.filters.urlrewrite.UrlRewriter.processRequest(UrlRewriter.java:92)at org.tuckey.web.filters.urlrewrite.UrlRewriteFilter.doFilter(UrlRewriteFilter.java:389)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)at ch.qos.logback.classic.helpers.MDCInsertingServletFilter.doFilter(MDCInsertingServletFilter.java:49)at com.yonyou.iuap.ucf.log.filter.UcfLogFilter.doFilter(UcfLogFilter.java:29)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)at com.yonyou.diwork.filter.SwitchTenantAndIdentityFilter.doFilter(SwitchTenantAndIdentityFilter.java:96)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)at com.yonyou.diwork.filter.RobotContextFilter.doFilter(RobotContextFilter.java:91)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100)at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93)at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)at com.yonyou.iuap.yms.session.web.YmsSessionFilter.doFilter(YmsSessionFilter.java:80)at javax.servlet.http.HttpFilter.doFilter(HttpFilter.java:127)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201)at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)at com.yonyou.cloud.filter.ZoneFilter.lambda$doFilter$0(ZoneFilter.java:106)at io.github.resilience4j.decorators.Decorators$DecorateSupplier.get(Decorators.java:166)at com.yonyou.cloud.middleware.framework.IrisBulkheadLimit.call(IrisBulkheadLimit.java:308)at com.yonyou.cloud.filter.ZoneFilter.doFilter(ZoneFilter.java:113)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)at com.yonyou.iuap.yms.session.web.YmsContextFilter.chainWithContext(YmsContextFilter.java:140)at com.yonyou.iuap.yms.session.web.YmsContextFilter.doFilter(YmsContextFilter.java:66)at javax.servlet.http.HttpFilter.doFilter(HttpFilter.java:127)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:177)at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97)at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:541)at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:135)at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78)at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:360)at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:399)at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65)at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:891)at org.apache.tomcat.util.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1784)at org.apache.tomcat.util.SocketProcessorBase.run(SocketProcessorBase.java:49)at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191)at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659)at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)at java.lang.Thread.run(Thread.java:748)2023-06-08 14:10:22.596 ERROR [http-nio-62871-exec-3] [c.y.u.m.e.e.GlobalDefaultExceptionHandler] [] [] [] [sr] [] [http://192.168.8.1:62871/demo/exception1] [] [yonbip-scm-scct,yonbip-scm-scct,,,0000LCG87YUW9VNEGY0000,99ea7655-00a2-4bda-b23c-19ade37ea574,test,] - yonbip-scm-scct:null java.lang.NullPointerException: nullat com.yonyoucloud.scct.datasrv.controller.DemoController.exception1(DemoController.java:66)at com.yonyoucloud.scct.datasrv.controller.DemoController.exception1(DemoController.java:56)at com.yonyoucloud.scct.datasrv.controller.DemoController$$FastClassBySpringCGLIB$$112cff0.invoke(<generated>)at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:218)at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:793)at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163)at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:763)at org.springframework.aop.framework.adapter.MethodBeforeAdviceInterceptor.invoke(MethodBeforeAdviceInterceptor.java:58)at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:763)at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:97)at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:763)at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:708)at com.yonyoucloud.scct.datasrv.controller.DemoController$$EnhancerBySpringCGLIB$$4a22ff4f.exception1(<generated>)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.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:205)at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:150)at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:117)at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:895)at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:808)at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1072)at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:965)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:645)at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883)at javax.servlet.http.HttpServlet.service(HttpServlet.java:750)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:227)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)at org.tuckey.web.filters.urlrewrite.RuleChain.handleRewrite(RuleChain.java:176)at org.tuckey.web.filters.urlrewrite.RuleChain.doRules(RuleChain.java:145)at org.tuckey.web.filters.urlrewrite.UrlRewriter.processRequest(UrlRewriter.java:92)at org.tuckey.web.filters.urlrewrite.UrlRewriteFilter.doFilter(UrlRewriteFilter.java:389)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)at ch.qos.logback.classic.helpers.MDCInsertingServletFilter.doFilter(MDCInsertingServletFilter.java:49)at com.yonyou.iuap.ucf.log.filter.UcfLogFilter.doFilter(UcfLogFilter.java:29)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)at com.yonyou.diwork.filter.SwitchTenantAndIdentityFilter.doFilter(SwitchTenantAndIdentityFilter.java:96)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)at com.yonyou.diwork.filter.RobotContextFilter.doFilter(RobotContextFilter.java:91)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100)at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93)at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)at com.yonyou.iuap.yms.session.web.YmsSessionFilter.doFilter(YmsSessionFilter.java:80)at javax.servlet.http.HttpFilter.doFilter(HttpFilter.java:127)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201)at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)at com.yonyou.cloud.filter.ZoneFilter.lambda$doFilter$0(ZoneFilter.java:106)at io.github.resilience4j.decorators.Decorators$DecorateSupplier.get(Decorators.java:166)at com.yonyou.cloud.middleware.framework.IrisBulkheadLimit.call(IrisBulkheadLimit.java:308)at com.yonyou.cloud.filter.ZoneFilter.doFilter(ZoneFilter.java:113)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)at com.yonyou.iuap.yms.session.web.YmsContextFilter.chainWithContext(YmsContextFilter.java:140)at com.yonyou.iuap.yms.session.web.YmsContextFilter.doFilter(YmsContextFilter.java:66)at javax.servlet.http.HttpFilter.doFilter(HttpFilter.java:127)at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:177)at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97)at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:541)at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:135)at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78)at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:360)at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:399)at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65)at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:891)at org.apache.tomcat.util.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1784)at org.apache.tomcat.util.SocketProcessorBase.run(SocketProcessorBase.java:49)at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191)at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659)at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)at java.lang.Thread.run(Thread.java:748)

这种方式好，因为第一次如果catch住之后直接往上throw的话，那么问题依旧是可以暴露的，因为throw的是真实的异常。

总结说明

1：一坨大栈帧的打印，一定对应了一个异常的捕获，以及捕获之后再进行logger.info()
2：一个异常被打印了N坨上边的栈帧，这是因为1中的发生了多次，也就是异常发生后，先catch住之后再进行logger再进行throw这种操作进行了多次。
3：一坨一坨的最开始一行都有时间，时间从上到下是逐渐增大的，最上边的基本上就是真实异常发生的位置。
4：为什么实际开发中就是发生了一个空指针，咋抛出来之后各种奇葩的东西呢？是因为异常被代码捕获之后，可能重新创建了一个Excetion对象抛了出来
5：为什么我们代码当中直接throw 异常出来这样也可以呢？真正传输前端的时候，一定是有一个e.getString()的操作。