Java: 使用Spring Tools 4 Eclipse在EasyBuggy Boot上进行开发和调试

2 年 ago

科, 雅

5 minutes

EasyBuggy Boot是什么意思？

这是一个充满了错误和漏洞操作的Web应用程序，例如内存泄漏、死锁、JVM崩溃、SQL注入等，旨在理解错误和漏洞的工作原理。该应用程序以Apache 2.0许可证进行公开发布。

直到能够进行开发和调试为止。

作者在EASYBUGGY BOOT的说明书中整理了一些信息。
然而，在我目前的环境下，直接运行并不能成功。
因此，在本文中，我将总结出使其能够重新开发和调试的步骤。

本文介绍了我正在使用的Spring Tools 4 for Eclipse（Windows 64位版本）。

前提 tí) – condition, prerequisite

确保已安装Java（JDK）8和Maven。
如果未安装，请参考以下文章。

Eclipse 的 Spring Tools 4 的下载

从下面的页面中选择Spring Tools 4 for Eclipse，并下载spring-tool-suite-4-4.9.0.RELEASE-e4.18.0-win32.win32.x86_64.self-extracting.jar（截至2021年3月10日）。

文件解压缩

运行Spring Tools 4

选择工作空间目录

确认Spring Tools 4主屏幕

如果没有特别的问题，就会显示这样的屏幕。
从左上方的Package Explorer中的选项中选择Import projects…。

导入项目

Maven 项目的构建

启动（失败）

Exception in thread "main" java.lang.ClassCastException: class jdk.internal.loader.ClassLoaders$AppClassLoader cannot be cast to class java.net.URLClassLoader (jdk.internal.loader.ClassLoaders$AppClassLoader and java.net.URLClassLoader are in module java.base of loader 'bootstrap')
    at org.springframework.boot.devtools.restart.DefaultRestartInitializer.getUrls(DefaultRestartInitializer.java:93)
    at org.springframework.boot.devtools.restart.DefaultRestartInitializer.getInitialUrls(DefaultRestartInitializer.java:56)
    at org.springframework.boot.devtools.restart.Restarter.<init>(Restarter.java:140)
    at org.springframework.boot.devtools.restart.Restarter.initialize(Restarter.java:546)
    at org.springframework.boot.devtools.restart.RestartApplicationListener.onApplicationStartingEvent(RestartApplicationListener.java:67)
    at org.springframework.boot.devtools.restart.RestartApplicationListener.onApplicationEvent(RestartApplicationListener.java:45)
    at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:167)
    at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:139)
    at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:122)
    at org.springframework.boot.context.event.EventPublishingRunListener.starting(EventPublishingRunListener.java:69)
    at org.springframework.boot.SpringApplicationRunListeners.starting(SpringApplicationRunListeners.java:48)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:292)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1118)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1107)
    at org.t246osslab.easybuggy4sb.Easybuggy4sbApplication.main(Easybuggy4sbApplication.java:15)

删除DevTools

由于没有办法，所以采取了回避措施。
右键单击Package Explorer中的easybuggy4sb项目，选择Spring > 删除DevTools。

删除DevTools后，再次尝试启动。

然而，这一次却出现了另一个错误。

Error starting ApplicationContext. To display the auto-configuration report re-run your application with 'debug' enabled.
2021-03-10 23:56:56.503 ERROR 27856 --- [           main] o.s.boot.SpringApplication               : Application startup failed

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'halMessageConverterSupportedMediaTypeCustomizer': Invocation of init method failed; nested exception is java.lang.NoClassDefFoundError: org/springframework/hateoas/mvc/TypeConstrainedMappingJackson2HttpMessageConverter
    at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.postProcessBeforeInitialization(InitDestroyAnnotationBeanPostProcessor.java:137) ~[spring-beans-4.3.11.RELEASE.jar:4.3.11.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyBeanPostProcessorsBeforeInitialization(AbstractAutowireCapableBeanFactory.java:409) ~[spring-beans-4.3.11.RELEASE.jar:4.3.11.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1620) ~[spring-beans-4.3.11.RELEASE.jar:4.3.11.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:555) ~[spring-beans-4.3.11.RELEASE.jar:4.3.11.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:483) ~[spring-beans-4.3.11.RELEASE.jar:4.3.11.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306) ~[spring-beans-4.3.11.RELEASE.jar:4.3.11.RELEASE]
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) ~[spring-beans-4.3.11.RELEASE.jar:4.3.11.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302) ~[spring-beans-4.3.11.RELEASE.jar:4.3.11.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197) ~[spring-beans-4.3.11.RELEASE.jar:4.3.11.RELEASE]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:761) ~[spring-beans-4.3.11.RELEASE.jar:4.3.11.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:867) ~[spring-context-4.3.11.RELEASE.jar:4.3.11.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:543) ~[spring-context-4.3.11.RELEASE.jar:4.3.11.RELEASE]
    at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:122) ~[spring-boot-1.5.7.RELEASE.jar:1.5.7.RELEASE]
    at org.springframework.boot.actuate.autoconfigure.EndpointWebMvcAutoConfiguration.createChildManagementContext(EndpointWebMvcAutoConfiguration.java:193) ~[spring-boot-actuator-1.5.7.RELEASE.jar:1.5.7.RELEASE]
    at org.springframework.boot.actuate.autoconfigure.EndpointWebMvcAutoConfiguration.afterSingletonsInstantiated(EndpointWebMvcAutoConfiguration.java:156) ~[spring-boot-actuator-1.5.7.RELEASE.jar:1.5.7.RELEASE]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:781) ~[spring-beans-4.3.11.RELEASE.jar:4.3.11.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:867) ~[spring-context-4.3.11.RELEASE.jar:4.3.11.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:543) ~[spring-context-4.3.11.RELEASE.jar:4.3.11.RELEASE]
    at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:122) ~[spring-boot-1.5.7.RELEASE.jar:1.5.7.RELEASE]
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:693) ~[spring-boot-1.5.7.RELEASE.jar:1.5.7.RELEASE]
    at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:360) ~[spring-boot-1.5.7.RELEASE.jar:1.5.7.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:303) ~[spring-boot-1.5.7.RELEASE.jar:1.5.7.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1118) ~[spring-boot-1.5.7.RELEASE.jar:1.5.7.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1107) ~[spring-boot-1.5.7.RELEASE.jar:1.5.7.RELEASE]
    at org.t246osslab.easybuggy4sb.Easybuggy4sbApplication.main(Easybuggy4sbApplication.java:15) ~[classes/:na]
Caused by: java.lang.NoClassDefFoundError: org/springframework/hateoas/mvc/TypeConstrainedMappingJackson2HttpMessageConverter
    at org.springframework.boot.autoconfigure.hateoas.HypermediaHttpMessageConverterConfiguration$HalMessageConverterSupportedMediaTypesCustomizer.configureHttpMessageConverter(HypermediaHttpMessageConverterConfiguration.java:83) ~[spring-boot-autoconfigure-1.5.7.RELEASE.jar:1.5.7.RELEASE]
    at org.springframework.boot.autoconfigure.hateoas.HypermediaHttpMessageConverterConfiguration$HalMessageConverterSupportedMediaTypesCustomizer.configureHttpMessageConverters(HypermediaHttpMessageConverterConfiguration.java:77) ~[spring-boot-autoconfigure-1.5.7.RELEASE.jar:1.5.7.RELEASE]
    at org.springframework.boot.autoconfigure.hateoas.HypermediaHttpMessageConverterConfiguration$HalMessageConverterSupportedMediaTypesCustomizer.configureHttpMessageConverters(HypermediaHttpMessageConverterConfiguration.java:67) ~[spring-boot-autoconfigure-1.5.7.RELEASE.jar:1.5.7.RELEASE]
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na]
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:64) ~[na:na]
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na]
    at java.base/java.lang.reflect.Method.invoke(Method.java:564) ~[na:na]
    at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleElement.invoke(InitDestroyAnnotationBeanPostProcessor.java:366) ~[spring-beans-4.3.11.RELEASE.jar:4.3.11.RELEASE]
    at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor$LifecycleMetadata.invokeInitMethods(InitDestroyAnnotationBeanPostProcessor.java:311) ~[spring-beans-4.3.11.RELEASE.jar:4.3.11.RELEASE]
    at org.springframework.beans.factory.annotation.InitDestroyAnnotationBeanPostProcessor.postProcessBeforeInitialization(InitDestroyAnnotationBeanPostProcessor.java:134) ~[spring-beans-4.3.11.RELEASE.jar:4.3.11.RELEASE]
    ... 24 common frames omitted
Caused by: java.lang.ClassNotFoundException: org.springframework.hateoas.mvc.TypeConstrainedMappingJackson2HttpMessageConverter
    at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:606) ~[na:na]
    at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:168) ~[na:na]
    at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:522) ~[na:na]
    ... 34 common frames omitted

升级Spring Boot版本

打开pom.xml文件，将spring-boot-starter-parent的版本更新为最新版本。

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>1.5.6.RELEASE</version>
    <relativePath /> <!-- lookup parent from repository -->
</parent>

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>1.5.22.RELEASE</version>
    <relativePath /> <!-- lookup parent from repository -->
</parent>

终于成功启动

如果在Console中输出了如下日志，则表示成功。

2021-03-11 00:07:43.360  INFO 17724 --- [           main] o.t.e.Easybuggy4sbApplication            : Started Easybuggy4sbApplication in 5.688 seconds (JVM running for 6.237)

辛苦了。