我尝试对args()使用AspectJ pointcut,但在springboot和tomcat一起运行时,它会产生NullPointException。
2018-11-26 11:07:22.952 ERROR 12620 --- [ main] o.a.c.c.C.[Tomcat].[localhost].[/] : Exception starting filter [requestContextFilter]
java.lang.NullPointerException: null
at org.springframework.web.filter.GenericFilterBean.init(GenericFilterBean.java:240) ~[spring-web-5.1.2.RELEASE.jar:5.1.2.RELEASE]
at org.apache.catalina.core.ApplicationFilterConfig.initFilter(ApplicationFilterConfig.java:270) ~[tomcat-embed-core-9.0.12.jar:9.0.12]
at org.apache.catalina.core.ApplicationFilterConfig.<init>(ApplicationFilterConfig.java:106) ~[tomcat-embed-core-9.0.12.jar:9.0.12]
at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:4491) [tomcat-embed-core-9.0.12.jar:9.0.12]
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5135) [tomcat-embed-core-9.0.12.jar:9.0.12]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183) [tomcat-embed-core-9.0.12.jar:9.0.12]
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1429) [tomcat-embed-core-9.0.12.jar:9.0.12]
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1419) [tomcat-embed-core-9.0.12.jar:9.0.12]
at java.util.concurrent.FutureTask.run(FutureTask.java:266) [na:1.8.0_121]
at org.apache.tomcat.util.threads.InlineExecutorService.execute(InlineExecutorService.java:75) [tomcat-embed-core-9.0.12.jar:9.0.12]
at java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:134) [na:1.8.0_121]
at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:944) [tomcat-embed-core-9.0.12.jar:9.0.12]
at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:839) [tomcat-embed-core-9.0.12.jar:9.0.12]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183) [tomcat-embed-core-9.0.12.jar:9.0.12]
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1429) [tomcat-embed-core-9.0.12.jar:9.0.12]
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1419) [tomcat-embed-core-9.0.12.jar:9.0.12]
at java.util.concurrent.FutureTask.run(FutureTask.java:266) [na:1.8.0_121]
at org.apache.tomcat.util.threads.InlineExecutorService.execute(InlineExecutorService.java:75) [tomcat-embed-core-9.0.12.jar:9.0.12]
at java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:134) [na:1.8.0_121]
at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:944) [tomcat-embed-core-9.0.12.jar:9.0.12]
at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:261) [tomcat-embed-core-9.0.12.jar:9.0.12]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183) [tomcat-embed-core-9.0.12.jar:9.0.12]
at org.apache.catalina.core.StandardService.startInternal(StandardService.java:422) [tomcat-embed-core-9.0.12.jar:9.0.12]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183) [tomcat-embed-core-9.0.12.jar:9.0.12]
at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:770) [tomcat-embed-core-9.0.12.jar:9.0.12]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183) [tomcat-embed-core-9.0.12.jar:9.0.12]
at org.apache.catalina.startup.Tomcat.start(Tomcat.java:370) [tomcat-embed-core-9.0.12.jar:9.0.12]
at org.springframework.boot.web.embedded.tomcat.TomcatWebServer.initialize(TomcatWebServer.java:106) [spring-boot-2.1.0.RELEASE.jar:2.1.0.RELEASE]
at org.springframework.boot.web.embedded.tomcat.TomcatWebServer.<init>(TomcatWebServer.java:86) [spring-boot-2.1.0.RELEASE.jar:2.1.0.RELEASE]
at org.springframework.boot.web.embedded.tomcat.TomcatServletWebServerFactory.getTomcatWebServer(TomcatServletWebServerFactory.java:414) [spring-boot-2.1.0.RELEASE.jar:2.1.0.RELEASE]
at org.springframework.boot.web.embedded.tomcat.TomcatServletWebServerFactory.getWebServer(TomcatServletWebServerFactory.java:174) [spring-boot-2.1.0.RELEASE.jar:2.1.0.RELEASE]
at org.springframework.boot.web.embedded.tomcat.TomcatServletWebServerFactory$$FastClassBySpringCGLIB$$9c83fa9f.invoke(<generated>) [spring-boot-2.1.0.RELEASE.jar:2.1.0.RELEASE]
at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:218) [spring-core-5.1.2.RELEASE.jar:5.1.2.RELEASE]
at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:746) [spring-aop-5.1.2.RELEASE.jar:5.1.2.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163) [spring-aop-5.1.2.RELEASE.jar:5.1.2.RELEASE]
at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:93) [spring-aop-5.1.2.RELEASE.jar:5.1.2.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) [spring-aop-5.1.2.RELEASE.jar:5.1.2.RELEASE]
at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:688) [spring-aop-5.1.2.RELEASE.jar:5.1.2.RELEASE]
at org.springframework.boot.web.embedded.tomcat.TomcatServletWebServerFactory$$EnhancerBySpringCGLIB$$ccaf20b3.getWebServer(<generated>) [spring-boot-2.1.0.RELEASE.jar:2.1.0.RELEASE]
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.createWebServer(ServletWebServerApplicationContext.java:179) [spring-boot-2.1.0.RELEASE.jar:2.1.0.RELEASE]
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.onRefresh(ServletWebServerApplicationContext.java:152) [spring-boot-2.1.0.RELEASE.jar:2.1.0.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:540) [spring-context-5.1.2.RELEASE.jar:5.1.2.RELEASE]
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:140) [spring-boot-2.1.0.RELEASE.jar:2.1.0.RELEASE]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:775) [spring-boot-2.1.0.RELEASE.jar:2.1.0.RELEASE]
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397) [spring-boot-2.1.0.RELEASE.jar:2.1.0.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:316) [spring-boot-2.1.0.RELEASE.jar:2.1.0.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1260) [spring-boot-2.1.0.RELEASE.jar:2.1.0.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1248) [spring-boot-2.1.0.RELEASE.jar:2.1.0.RELEASE]
at cn.piumnl.demo.DemoApplication.main(DemoApplication.java:10) [classes/:na]
2018-11-26 11:07:22.953 ERROR 12620 --- [ main] o.a.c.c.C.[Tomcat].[localhost].[/] : Exception starting filter [hiddenHttpMethodFilter]
// Omitting part of the error message, it like above log
2018-11-26 11:07:22.954 ERROR 12620 --- [ main] o.a.c.c.C.[Tomcat].[localhost].[/] : Exception starting filter [characterEncodingFilter]
// Omitting part of the error message, it like above log
2018-11-26 11:07:22.954 ERROR 12620 --- [ main] o.a.c.c.C.[Tomcat].[localhost].[/] : Exception starting filter [formContentFilter]
java.lang.NullPointerException: null
at org.springframework.web.filter.GenericFilterBean.init(GenericFilterBean.java:240) ~[spring-web-5.1.2.RELEASE.jar:5.1.2.RELEASE]
at org.apache.catalina.core.ApplicationFilterConfig.initFilter(ApplicationFilterConfig.java:270) ~[tomcat-embed-core-9.0.12.jar:9.0.12]
at org.apache.catalina.core.ApplicationFilterConfig.<init>(ApplicationFilterConfig.java:106) ~[tomcat-embed-core-9.0.12.jar:9.0.12]
at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:4491) [tomcat-embed-core-9.0.12.jar:9.0.12]
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5135) [tomcat-embed-core-9.0.12.jar:9.0.12]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183) [tomcat-embed-core-9.0.12.jar:9.0.12]
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1429) [tomcat-embed-core-9.0.12.jar:9.0.12]
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1419) [tomcat-embed-core-9.0.12.jar:9.0.12]
at java.util.concurrent.FutureTask.run(FutureTask.java:266) [na:1.8.0_121]
at org.apache.tomcat.util.threads.InlineExecutorService.execute(InlineExecutorService.java:75) [tomcat-embed-core-9.0.12.jar:9.0.12]
at java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:134) [na:1.8.0_121]
at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:944) [tomcat-embed-core-9.0.12.jar:9.0.12]
at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:839) [tomcat-embed-core-9.0.12.jar:9.0.12]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183) [tomcat-embed-core-9.0.12.jar:9.0.12]
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1429) [tomcat-embed-core-9.0.12.jar:9.0.12]
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1419) [tomcat-embed-core-9.0.12.jar:9.0.12]
at java.util.concurrent.FutureTask.run(FutureTask.java:266) [na:1.8.0_121]
at org.apache.tomcat.util.threads.InlineExecutorService.execute(InlineExecutorService.java:75) [tomcat-embed-core-9.0.12.jar:9.0.12]
at java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:134) [na:1.8.0_121]
at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:944) [tomcat-embed-core-9.0.12.jar:9.0.12]
at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:261) [tomcat-embed-core-9.0.12.jar:9.0.12]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183) [tomcat-embed-core-9.0.12.jar:9.0.12]
at org.apache.catalina.core.StandardService.startInternal(StandardService.java:422) [tomcat-embed-core-9.0.12.jar:9.0.12]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183) [tomcat-embed-core-9.0.12.jar:9.0.12]
at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:770) [tomcat-embed-core-9.0.12.jar:9.0.12]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183) [tomcat-embed-core-9.0.12.jar:9.0.12]
at org.apache.catalina.startup.Tomcat.start(Tomcat.java:370) [tomcat-embed-core-9.0.12.jar:9.0.12]
at org.springframework.boot.web.embedded.tomcat.TomcatWebServer.initialize(TomcatWebServer.java:106) [spring-boot-2.1.0.RELEASE.jar:2.1.0.RELEASE]
at org.springframework.boot.web.embedded.tomcat.TomcatWebServer.<init>(TomcatWebServer.java:86) [spring-boot-2.1.0.RELEASE.jar:2.1.0.RELEASE]
at org.springframework.boot.web.embedded.tomcat.TomcatServletWebServerFactory.getTomcatWebServer(TomcatServletWebServerFactory.java:414) [spring-boot-2.1.0.RELEASE.jar:2.1.0.RELEASE]
at org.springframework.boot.web.embedded.tomcat.TomcatServletWebServerFactory.getWebServer(TomcatServletWebServerFactory.java:174) [spring-boot-2.1.0.RELEASE.jar:2.1.0.RELEASE]
at org.springframework.boot.web.embedded.tomcat.TomcatServletWebServerFactory$$FastClassBySpringCGLIB$$9c83fa9f.invoke(<generated>) [spring-boot-2.1.0.RELEASE.jar:2.1.0.RELEASE]
at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:218) [spring-core-5.1.2.RELEASE.jar:5.1.2.RELEASE]
at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:746) [spring-aop-5.1.2.RELEASE.jar:5.1.2.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163) [spring-aop-5.1.2.RELEASE.jar:5.1.2.RELEASE]
at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:93) [spring-aop-5.1.2.RELEASE.jar:5.1.2.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) [spring-aop-5.1.2.RELEASE.jar:5.1.2.RELEASE]
at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:688) [spring-aop-5.1.2.RELEASE.jar:5.1.2.RELEASE]
at org.springframework.boot.web.embedded.tomcat.TomcatServletWebServerFactory$$EnhancerBySpringCGLIB$$ccaf20b3.getWebServer(<generated>) [spring-boot-2.1.0.RELEASE.jar:2.1.0.RELEASE]
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.createWebServer(ServletWebServerApplicationContext.java:179) [spring-boot-2.1.0.RELEASE.jar:2.1.0.RELEASE]
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.onRefresh(ServletWebServerApplicationContext.java:152) [spring-boot-2.1.0.RELEASE.jar:2.1.0.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:540) [spring-context-5.1.2.RELEASE.jar:5.1.2.RELEASE]
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:140) [spring-boot-2.1.0.RELEASE.jar:2.1.0.RELEASE]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:775) [spring-boot-2.1.0.RELEASE.jar:2.1.0.RELEASE]
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397) [spring-boot-2.1.0.RELEASE.jar:2.1.0.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:316) [spring-boot-2.1.0.RELEASE.jar:2.1.0.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1260) [spring-boot-2.1.0.RELEASE.jar:2.1.0.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1248) [spring-boot-2.1.0.RELEASE.jar:2.1.0.RELEASE]
at cn.piumnl.demo.DemoApplication.main(DemoApplication.java:10) [classes/:na]
2018-11-26 11:07:22.955 ERROR 12620 --- [ main] o.apache.catalina.core.StandardContext : One or more Filters failed to start. Full details will be found in the appropriate container log file
2018-11-26 11:07:22.955 ERROR 12620 --- [ main] o.apache.catalina.core.StandardContext : Context [] startup failed due to previous errors
2018-11-26 11:07:23.056 INFO 12620 --- [ main] o.apache.catalina.core.StandardService : Stopping service [Tomcat]
2018-11-26 11:07:23.060 WARN 12620 --- [ main] ConfigServletWebServerApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.context.ApplicationContextException: Unable to start web server; nested exception is org.springframework.boot.web.server.WebServerException: Unable to start embedded Tomcat
2018-11-26 11:07:23.071 INFO 12620 --- [ main] ConditionEvaluationReportLoggingListener :
Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2018-11-26 11:07:23.078 ERROR 12620 --- [ main] o.s.boot.SpringApplication : Application run failed
org.springframework.context.ApplicationContextException: Unable to start web server; nested exception is org.springframework.boot.web.server.WebServerException: Unable to start embedded Tomcat
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.onRefresh(ServletWebServerApplicationContext.java:155) ~[spring-boot-2.1.0.RELEASE.jar:2.1.0.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:540) ~[spring-context-5.1.2.RELEASE.jar:5.1.2.RELEASE]
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:140) ~[spring-boot-2.1.0.RELEASE.jar:2.1.0.RELEASE]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:775) [spring-boot-2.1.0.RELEASE.jar:2.1.0.RELEASE]
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397) [spring-boot-2.1.0.RELEASE.jar:2.1.0.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:316) [spring-boot-2.1.0.RELEASE.jar:2.1.0.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1260) [spring-boot-2.1.0.RELEASE.jar:2.1.0.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1248) [spring-boot-2.1.0.RELEASE.jar:2.1.0.RELEASE]
at cn.piumnl.demo.DemoApplication.main(DemoApplication.java:10) [classes/:na]
Caused by: org.springframework.boot.web.server.WebServerException: Unable to start embedded Tomcat
at org.springframework.boot.web.embedded.tomcat.TomcatWebServer.initialize(TomcatWebServer.java:125) ~[spring-boot-2.1.0.RELEASE.jar:2.1.0.RELEASE]
at org.springframework.boot.web.embedded.tomcat.TomcatWebServer.<init>(TomcatWebServer.java:86) ~[spring-boot-2.1.0.RELEASE.jar:2.1.0.RELEASE]
at org.springframework.boot.web.embedded.tomcat.TomcatServletWebServerFactory.getTomcatWebServer(TomcatServletWebServerFactory.java:414) ~[spring-boot-2.1.0.RELEASE.jar:2.1.0.RELEASE]
at org.springframework.boot.web.embedded.tomcat.TomcatServletWebServerFactory.getWebServer(TomcatServletWebServerFactory.java:174) ~[spring-boot-2.1.0.RELEASE.jar:2.1.0.RELEASE]
at org.springframework.boot.web.embedded.tomcat.TomcatServletWebServerFactory$$FastClassBySpringCGLIB$$9c83fa9f.invoke(<generated>) ~[spring-boot-2.1.0.RELEASE.jar:2.1.0.RELEASE]
at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:218) ~[spring-core-5.1.2.RELEASE.jar:5.1.2.RELEASE]
at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:746) ~[spring-aop-5.1.2.RELEASE.jar:5.1.2.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163) ~[spring-aop-5.1.2.RELEASE.jar:5.1.2.RELEASE]
at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:93) ~[spring-aop-5.1.2.RELEASE.jar:5.1.2.RELEASE]
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) ~[spring-aop-5.1.2.RELEASE.jar:5.1.2.RELEASE]
at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:688) ~[spring-aop-5.1.2.RELEASE.jar:5.1.2.RELEASE]
at org.springframework.boot.web.embedded.tomcat.TomcatServletWebServerFactory$$EnhancerBySpringCGLIB$$ccaf20b3.getWebServer(<generated>) ~[spring-boot-2.1.0.RELEASE.jar:2.1.0.RELEASE]
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.createWebServer(ServletWebServerApplicationContext.java:179) ~[spring-boot-2.1.0.RELEASE.jar:2.1.0.RELEASE]
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.onRefresh(ServletWebServerApplicationContext.java:152) ~[spring-boot-2.1.0.RELEASE.jar:2.1.0.RELEASE]
... 8 common frames omitted
Caused by: java.lang.IllegalStateException: StandardEngine[Tomcat].StandardHost[localhost].TomcatEmbeddedContext[] failed to start
at org.springframework.boot.web.embedded.tomcat.TomcatWebServer.rethrowDeferredStartupExceptions(TomcatWebServer.java:171) ~[spring-boot-2.1.0.RELEASE.jar:2.1.0.RELEASE]
at org.springframework.boot.web.embedded.tomcat.TomcatWebServer.initialize(TomcatWebServer.java:109) ~[spring-boot-2.1.0.RELEASE.jar:2.1.0.RELEASE]
... 21 common frames omitted
package cn.piumnl.demo;
import org.aspectj.lang.annotation.After;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Pointcut;
import org.springframework.stereotype.Component;
@Aspect
@Component
public class ArgsAop {
@Pointcut("args(entity)")
public void pointcut(ArgsEntity entity) {
}
@After(value = "pointcut(entity)", argNames = "entity")
public void test(ArgsEntity entity) {
System.out.println("args(entity)");
}
}
package cn.piumnl.demo;
public class ArgsEntity {}
package cn.piumnl.demo;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class DemoApplication {
public static void main(String[] args) {
SpringApplication.run(DemoApplication.class, args);
}
}
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>cn.piumnl</groupId>
<artifactId>demo</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>demo</name>
<description>Demo project for Spring Boot</description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.1.0.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-aop</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<!--<dependency>-->
<!--<groupId>org.springframework.boot</groupId>-->
<!--<artifactId>spring-boot-devtools</artifactId>-->
<!--<scope>runtime</scope>-->
<!--</dependency>-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
您的切入点可能针对整个世界,甚至Spring框架组件。如果您将错误消息的范围限制在您实际想要拦截的范围内,则错误消息将消失。
@Pointcut("within(cn.piumnl.demo..*) && args(entity)")
另一种选择是显式地排除导致切入点出现问题的包,但我仍然更喜欢白名单选项,而不是下面的选项:
@Pointcut("!within(org.springframework..*) && !within(com.sun..*) && args(entity)")
当使用Mockito截尾时,我们通常为一个方法指定一个具体的参数。之后,我们可以用相同的参数调用Stubed方法。例如,在下面的代码中,get()用参数0进行了stubed。所以,当调用get()时,get()的参数也是0。因此,get()将返回一个整数,即3。 如果调用语句被修改为: 即参数更改为1,然后Mockito抛出“NullPointerException”,而不是“AssertionE
我有一个想要减少的枚举值流。如果流为空或包含不同的值,我希望。如果它只包含一个值(的多个实例),我想要那个值。 我试着用减音来做: 不幸的是,这不起作用,因为当结果为时,这个reduce方法抛出一个。有人知道为什么会这样吗?为什么不是有效的结果? 现在,我是这样解决的: 在这起作用的同时,我并不满足于这种“弯路”。我喜欢减少,因为它似乎是合适的,把所有的东西都放进一个流。 有没有人能想出一个替代r
问题内容: 在我的应用程序中,有时会引发以下异常: 很难找到错误,因为在stacktrace中没有列出我的方法。那么,有人知道何时抛出此异常吗?感谢您的任何提示。 问题答案: 您可以在stacktrace中看到错误: 适配器的内容已更改,但ListView没有收到通知。确保不从后台线程修改适配器的内容,而仅从UI线程修改。 您应该调查一个线程,并使其与UI线程同步。 在Android中执行此操作的
问题内容: final Multimap terms = getTerms(bq); for (Term t : terms.keySet()) { Collection C = new HashSet(terms.get(t)); if (!C.isEmpty()) { for (Iterator it = C.iterator(); it.hasNext();) { BooleanClause
问题内容: 我试图将两个’Employee’对象添加到TreeSet中: 但是它抛出一个ClassCastException: 但是,如果我仅将一个对象添加到TreeSet中: 或者,如果我改用HashSet: 那就成功了。为什么会发生异常,我该如何解决? 问题答案: 要么必须实现,或者你需要提供一个比较创建时。 在文档中对此进行了详细说明: 插入排序集中的所有元素都必须实现接口(或被指定的比较器
问题内容: 将字符串解析为字节时出现异常 问题答案: 这是因为默认的parse方法要求使用十进制格式的数字来解析十六进制数字,请使用以下parse: 其中16是解析的基础。 至于您的评论,您是对的。字节的最大值为0x7F。因此,您可以将其解析为并执行二进制与操作以获得LSB,即您的字节: