IntelliJ与弹簧引导码-jsp

Question

我试图运行spring-boot-jetty-jsp样本。它使用mvn jetty:run命令行工作，但是当我尝试它的IntelliJ我得到这个错误：

2016-07-16 02:54:25.150 INFO 19012 --- [   main] s.jetty.jsp.SampleJettyJspApplication : Starting SampleJettyJspApplication on dac-Latitude-E7450 with PID 19012 (/home/dac/proj/spring-boot-master/spring-boot-samples/spring-boot-sample-jetty-jsp/target/classes started by dac in /home/dac/proj/spring-boot-master/spring-boot-samples/spring-boot-sample-jetty-jsp) 
2016-07-16 02:54:25.153 INFO 19012 --- [   main] s.jetty.jsp.SampleJettyJspApplication : No active profile set, falling back to default profiles: default 
2016-07-16 02:54:25.252 INFO 19012 --- [   main] s.c.a.AnnotationConfigApplicationContext : Refreshing org.springframework.context.annotation.AnnotationConfigApplicationContext@3ad83a66: startup date [Sat Jul 16 02:54:25 CEST 2016]; root of context hierarchy 
2016-07-16 02:54:25.402 WARN 19012 --- [   main] s.c.a.AnnotationConfigApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.BeanDefinitionStoreException: Failed to parse configuration class [sample.jetty.jsp.SampleJettyJspApplication]; nested exception is java.lang.IllegalStateException: Failed to introspect annotated methods on class org.springframework.boot.web.support.SpringBootServletInitializer 
2016-07-16 02:54:25.426 ERROR 19012 --- [   main] o.s.boot.SpringApplication    : Application startup failed 

org.springframework.beans.factory.BeanDefinitionStoreException: Failed to parse configuration class [sample.jetty.jsp.SampleJettyJspApplication]; nested exception is java.lang.IllegalStateException: Failed to introspect annotated methods on class org.springframework.boot.web.support.SpringBootServletInitializer 
    at org.springframework.context.annotation.ConfigurationClassParser.parse(ConfigurationClassParser.java:187) ~[spring-context-4.3.2.BUILD-20160715.204924-12.jar:4.3.2.BUILD-SNAPSHOT] 
    at org.springframework.context.annotation.ConfigurationClassPostProcessor.processConfigBeanDefinitions(ConfigurationClassPostProcessor.java:321) ~[spring-context-4.3.2.BUILD-20160715.204924-12.jar:4.3.2.BUILD-SNAPSHOT] 
    at org.springframework.context.annotation.ConfigurationClassPostProcessor.postProcessBeanDefinitionRegistry(ConfigurationClassPostProcessor.java:243) ~[spring-context-4.3.2.BUILD-20160715.204924-12.jar:4.3.2.BUILD-SNAPSHOT] 
    at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanDefinitionRegistryPostProcessors(PostProcessorRegistrationDelegate.java:273) ~[spring-context-4.3.2.BUILD-20160715.204924-12.jar:4.3.2.BUILD-SNAPSHOT] 
    at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:98) ~[spring-context-4.3.2.BUILD-20160715.204924-12.jar:4.3.2.BUILD-SNAPSHOT] 
    at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:681) ~[spring-context-4.3.2.BUILD-20160715.204924-12.jar:4.3.2.BUILD-SNAPSHOT] 
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:523) ~[spring-context-4.3.2.BUILD-20160715.204924-12.jar:4.3.2.BUILD-SNAPSHOT] 
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:759) [spring-boot-1.4.0.BUILD-SNAPSHOT.jar:1.4.0.BUILD-SNAPSHOT] 
    at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:369) [spring-boot-1.4.0.BUILD-SNAPSHOT.jar:1.4.0.BUILD-SNAPSHOT] 
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:313) [spring-boot-1.4.0.BUILD-SNAPSHOT.jar:1.4.0.BUILD-SNAPSHOT] 
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1185) [spring-boot-1.4.0.BUILD-SNAPSHOT.jar:1.4.0.BUILD-SNAPSHOT] 
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1174) [spring-boot-1.4.0.BUILD-SNAPSHOT.jar:1.4.0.BUILD-SNAPSHOT] 
    at sample.jetty.jsp.SampleJettyJspApplication.main(SampleJettyJspApplication.java:33) [classes/:na] 
Caused by: java.lang.IllegalStateException: Failed to introspect annotated methods on class org.springframework.boot.web.support.SpringBootServletInitializer 
    at org.springframework.core.type.StandardAnnotationMetadata.getAnnotatedMethods(StandardAnnotationMetadata.java:163) ~[spring-core-4.3.2.BUILD-20160715.204924-12.jar:4.3.2.BUILD-SNAPSHOT] 
    at org.springframework.context.annotation.ConfigurationClassParser.doProcessConfigurationClass(ConfigurationClassParser.java:301) ~[spring-context-4.3.2.BUILD-20160715.204924-12.jar:4.3.2.BUILD-SNAPSHOT] 
    at org.springframework.context.annotation.ConfigurationClassParser.processConfigurationClass(ConfigurationClassParser.java:237) ~[spring-context-4.3.2.BUILD-20160715.204924-12.jar:4.3.2.BUILD-SNAPSHOT] 
    at org.springframework.context.annotation.ConfigurationClassParser.parse(ConfigurationClassParser.java:204) ~[spring-context-4.3.2.BUILD-20160715.204924-12.jar:4.3.2.BUILD-SNAPSHOT] 
    at org.springframework.context.annotation.ConfigurationClassParser.parse(ConfigurationClassParser.java:173) ~[spring-context-4.3.2.BUILD-20160715.204924-12.jar:4.3.2.BUILD-SNAPSHOT] 
    ... 12 common frames omitted 
Caused by: java.lang.NoClassDefFoundError: javax/servlet/ServletContext 
    at java.lang.Class.getDeclaredMethods0(Native Method) ~[na:1.8.0_91] 
    at java.lang.Class.privateGetDeclaredMethods(Class.java:2701) ~[na:1.8.0_91] 
    at java.lang.Class.getDeclaredMethods(Class.java:1975) ~[na:1.8.0_91] 
    at org.springframework.core.type.StandardAnnotationMetadata.getAnnotatedMethods(StandardAnnotationMetadata.java:152) ~[spring-core-4.3.2.BUILD-20160715.204924-12.jar:4.3.2.BUILD-SNAPSHOT] 
    ... 16 common frames omitted 
Caused by: java.lang.ClassNotFoundException: javax.servlet.ServletContext 
    at java.net.URLClassLoader.findClass(URLClassLoader.java:381) ~[na:1.8.0_91] 
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[na:1.8.0_91] 
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331) ~[na:1.8.0_91] 
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[na:1.8.0_91] 
    ... 20 common frames omitted 

Disconnected from the target VM, address: '127.0.0.1:36461', transport: 'socket' 

Process finished with exit code 1 

有可能创造的IntelliJ一个maven配置和运行jetty:run参数与配置，那么它的工作原理。但是，上述错误意味着什么？

Answer 1

这是因为示例列出码头启动依赖为provided这样的IntelliJ不包括它的模块中，使得ServletContext类不可用，从而导致NoClassDefFound例外。

改变你pom.xml文件中的弹簧引导起动码头依赖的定义：

<dependency> 
    <groupId>org.springframework.boot</groupId> 
    <artifactId>spring-boot-starter-jetty</artifactId> 
    <!--<scope>provided</scope>--> 
</dependency> 

<dependency> 
    <groupId>org.eclipse.jetty</groupId> 
    <artifactId>apache-jsp</artifactId> 
    <!--<scope>provided</scope>--> 
</dependency> 

和刷新/重新导入的IntelliJ Maven项目。或者，如果您不想更改示例代码，则可以在IntelliJ中手动编辑模块设置中的依赖项 - 只需将所有提供的依赖项更改为编译，并且它应该会产生类似的结果。