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社区首页 >问答首页 >升级spring boot 2.0.0.RC2异常未设置ServletContext

问升级spring boot 2.0.0.RC2异常未设置ServletContext
EN

Stack Overflow用户
提问于 2018-02-25 17:07:35
回答 2查看 12.8K关注 0票数 15

调试后出现的问题是mvc配置类EnableWebMvcConfiguration加载太早，servlet还没有加载。

代码语言：javascript
复制
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'resourceHandlerMapping' defined in class path resource [org/springframework/boot/autoconfigure/web/servlet/WebMvcAutoConfiguration$EnableWebMvcConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.web.servlet.HandlerMapping]: Factory method 'resourceHandlerMapping' threw exception; nested exception is java.lang.IllegalStateException: No ServletContext set
    at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:587) ~[spring-beans-5.0.4.RELEASE.jar:5.0.4.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1250) ~[spring-beans-5.0.4.RELEASE.jar:5.0.4.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1099) ~[spring-beans-5.0.4.RELEASE.jar:5.0.4.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:545) ~[spring-beans-5.0.4.RELEASE.jar:5.0.4.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:502) ~[spring-beans-5.0.4.RELEASE.jar:5.0.4.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:312) ~[spring-beans-5.0.4.RELEASE.jar:5.0.4.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory$$Lambda$125/98506158.getObject(Unknown Source) ~[na:na]
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228) ~[spring-beans-5.0.4.RELEASE.jar:5.0.4.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:310) ~[spring-beans-5.0.4.RELEASE.jar:5.0.4.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:200) ~[spring-beans-5.0.4.RELEASE.jar:5.0.4.RELEASE]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:760) ~[spring-beans-5.0.4.RELEASE.jar:5.0.4.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:868) ~[spring-context-5.0.4.RELEASE.jar:5.0.4.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:549) ~[spring-context-5.0.4.RELEASE.jar:5.0.4.RELEASE]
    at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:140) ~[spring-boot-2.0.0.RC2.jar:2.0.0.RC2]
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:752) [spring-boot-2.0.0.RC2.jar:2.0.0.RC2]
    at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:388) [spring-boot-2.0.0.RC2.jar:2.0.0.RC2]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:327) [spring-boot-2.0.0.RC2.jar:2.0.0.RC2]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1246) [spring-boot-2.0.0.RC2.jar:2.0.0.RC2]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1234) [spring-boot-2.0.0.RC2.jar:2.0.0.RC2]
    at com.manway.BccApplication.main(BccApplication.java:16) [main/:na]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_40]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_40]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_40]
    at java.lang.reflect.Method.invoke(Method.java:497) ~[na:1.8.0_40]
    at org.springframework.boot.devtools.restart.RestartLauncher.run(RestartLauncher.java:49) [spring-boot-devtools-2.0.0.RC2.jar:2.0.0.RC2]
Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.web.servlet.HandlerMapping]: Factory method 'resourceHandlerMapping' threw exception; nested exception is java.lang.IllegalStateException: No ServletContext set
    at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:185) ~[spring-beans-5.0.4.RELEASE.jar:5.0.4.RELEASE]
    at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:579) ~[spring-beans-5.0.4.RELEASE.jar:5.0.4.RELEASE]
    ... 24 common frames omitted
Caused by: java.lang.IllegalStateException: No ServletContext set
    at org.springframework.util.Assert.state(Assert.java:73) ~[spring-core-5.0.4.RELEASE.jar:5.0.4.RELEASE]
    at org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport.resourceHandlerMapping(WebMvcConfigurationSupport.java:485) ~[spring-webmvc-5.0.4.RELEASE.jar:5.0.4.RELEASE]
    at org.springframework.boot.autoconfigure.web.servlet.WebMvcAutoConfiguration$EnableWebMvcConfiguration$$EnhancerBySpringCGLIB$$5de64506.CGLIB$resourceHandlerMapping$40(<generated>) ~[spring-boot-autoconfigure-2.0.0.RC2.jar:2.0.0.RC2]
    at org.springframework.boot.autoconfigure.web.servlet.WebMvcAutoConfiguration$EnableWebMvcConfiguration$$EnhancerBySpringCGLIB$$5de64506$$FastClassBySpringCGLIB$$edc706a5.invoke(<generated>) ~[spring-boot-autoconfigure-2.0.0.RC2.jar:2.0.0.RC2]
    at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:228) ~[spring-core-5.0.4.RELEASE.jar:5.0.4.RELEASE]
    at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:361) ~[spring-context-5.0.4.RELEASE.jar:5.0.4.RELEASE]
    at org.springframework.boot.autoconfigure.web.servlet.WebMvcAutoConfiguration$EnableWebMvcConfiguration$$EnhancerBySpringCGLIB$$5de64506.resourceHandlerMapping(<generated>) ~[spring-boot-autoconfigure-2.0.0.RC2.jar:2.0.0.RC2]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_40]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_40]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_40]
    at java.lang.reflect.Method.invoke(Method.java:497) ~[na:1.8.0_40]
    at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:154) ~[spring-beans-5.0.4.RELEASE.jar:5.0.4.RELEASE]
    ... 25 common frames omitted
spring-boot
EN

回答 2

Stack Overflow用户

发布于 2018-06-01 05:35:19

“调试后，问题是mvc配置类EnableWebMvcConfiguration加载太早，servlet还没有加载。”

我在这上面花了几个小时。我设法找到了发生这种情况的原因。我的配置被分成了几个文件，并且我在Security config (之前创建的)中创建了一个与MVC相关的bean，强制在使用MVC配置之前使用它。

解决方案是将@Bean实例从安全配置移到MVC配置。我希望它能帮助其他人！

票数 42
EN

Stack Overflow用户

发布于 2020-04-10 20:42:15

我也有同样的"No ServletContext set“问题，我想通过一个简单的演示来了解，这个演示对我很有帮助。因此，我将分享我的 simple 演示，希望它也能对您有所帮助。

注意：

(1)我使用的示例与OP略有不同，但概念和问题是相同的。

(2)我删除了一些与本demo无关的日志。

Spring Boot应用程序简单内容-只有3个类：

(1)用@SpringBootApplication注解的主类BeanLoadingDemoApplication，

(2)覆盖一个configure方法的class WebSecurityConfiguration extends WebSecurityConfigurerAdapter

(3)和两个测试bean，一个在独立的@Configuration类中，另一个在(2)中的主@SpringBootApplication类中。

启动应用后的日志如下所示。只需关注日志中部分所在的：

INFO o.s.web.context.ContextLoader -根WebApplicationContext:初始化在700毫秒内完成INFO c.example.demo.WebSecurityConfiguration - WebSecurityConfiguration() -构造函数

代码语言：javascript
复制
INFO  c.e.demo.BeanLoadingDemoApplication - Starting BeanLoadingDemoApplication 
INFO  o.s.b.w.embedded.tomcat.TomcatWebServer - Tomcat initialized with port(s): 8080 (http)
INFO  o.a.c.c.C.[Tomcat].[localhost].[/] - Initializing Spring embedded WebApplicationContext
INFO  o.s.web.context.ContextLoader - Root WebApplicationContext: initialization completed in 700 ms
INFO  c.example.demo.WebSecurityConfiguration - WebSecurityConfiguration() - Constructor
INFO  com.example.demo.TestBeanConfiguration - #############################
INFO  com.example.demo.TestBeanConfiguration - @Configuration - @Bean - testBean()
INFO  com.example.demo.TestBeanConfiguration - #############################
INFO  c.e.demo.BeanLoadingDemoApplication - #############################
INFO  c.e.demo.BeanLoadingDemoApplication - @SringBootApp - @Bean - testBean2
INFO  c.e.demo.BeanLoadingDemoApplication - #############################
INFO  c.example.demo.WebSecurityConfiguration - =======================================
INFO  c.example.demo.WebSecurityConfiguration - @Configuration - WebSecurityConfiguration - @Override configure
INFO  c.example.demo.WebSecurityConfiguration - =======================================
INFO  c.e.demo.BeanLoadingDemoApplication - Started BeanLoadingDemoApplication in 1.371 seconds (JVM running for 2.326)

到目前为止还好吗？很简单，对吧？现在我添加一个

代码语言：javascript
复制
@Bean
public ServletWebServerFactory servletContainer() { 
    TomcatServletWebServerFactory tomcat = new TomcatServletWebServerFactory();
...
}

在类WebSecurityConfiguration中为Tomcat配置第二个连接器。只需将焦点放在这个部件已经“移动”的地方：

WebSecurityConfiguration() -构造函数

您是否看到构造函数是在启动应用程序之后立即调用的，并且是在根WebApplicationContext初始化之前构造的？到目前为止，问题已经很清楚了。

代码语言：javascript
复制
INFO  c.e.demo.BeanLoadingDemoApplication - Starting BeanLoadingDemoApplication
INFO  c.example.demo.WebSecurityConfiguration - WebSecurityConfiguration() - Constructor
INFO  o.s.b.w.embedded.tomcat.TomcatWebServer - Tomcat initialized with port(s): 8080 (http) 8080 (http)
INFO  o.a.c.c.C.[Tomcat].[localhost].[/] - Initializing Spring embedded WebApplicationContext
INFO  o.s.web.context.ContextLoader - Root WebApplicationContext: initialization completed in 785 ms
INFO  com.example.demo.TestBeanConfiguration - #############################
INFO  com.example.demo.TestBeanConfiguration - @Configuration - @Bean - testBean()
INFO  com.example.demo.TestBeanConfiguration - #############################
INFO  c.e.demo.BeanLoadingDemoApplication - #############################
INFO  c.e.demo.BeanLoadingDemoApplication - @SringBootApp - @Bean - testBean2
INFO  c.e.demo.BeanLoadingDemoApplication - #############################
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'resourceHandlerMapping' defined in class path resource
Caused by: java.lang.IllegalStateException: No ServletContext set

原因是由于Spring Boot在创建自己的Tomcat之前初始化嵌入的WebApplicationContext，因此它需要在初始化Tomcat之前和在初始化根WebApplicationContext之前配置我通过@Bean 添加到Tomcat的连接器！！但是因为我的@Bean在WebSecurityConfiguration class中，所以该类的构造时间比预期的要早得多，因此它不会有ServletContext！！

解决方案是将此

代码语言：javascript
复制
@Bean
public ServletWebServerFactory servletContainer() {
    TomcatServletWebServerFactory tomcat = new TomcatServletWebServerFactory();
    ...
}

在@Configuration独立类中，这样WebSecurityConfiguration的构造函数就不会被提前调用，并且通过这样做，它将获得所需的ServletContext。

我希望这个“可视化”的例子能有所帮助。

干杯

票数 9
EN
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：

https://stackoverflow.com/questions/48971937

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