Spring Boot:由于缺少EmbeddedServletContainerFactory bean,无法启动EmbeddedWebApplicationContext

Question

我是Spring的新手,并开始从这个站点做官方指南:https: //spring.io/guides

我想做这个指南:https: //spring.io/guides/gs/scheduling-tasks/

我得到以下例外:

2014-02-14 16:25:21.614  INFO 9032 --- [           main] trationDelegate$BeanPostProcessorChecker : Bean 'org.springframework.scheduling.annotation.SchedulingConfiguration' of type [class org.springframework.scheduling.annotation.SchedulingConfiguration$$EnhancerByCGLIB$$5b48d763] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)
2014-02-14 16:25:21.638  INFO 9032 --- [           main] .c.l.ClasspathLoggingApplicationListener : Application failed to start with classpath: [file:/C:/work/Spring/SpringTutorial/target/classes/, file:/C:/work/apache-maven-3.0.3/repo/javax/servlet/javax.servlet-api/3.0.1/javax.servlet-api-3.0.1.jar, file:/C:/work/apache-maven-3.0.3/repo/org/springframework/boot/spring-boot-starter/1.0.0.RC1/spring-boot-starter-1.0.0.RC1.jar, file:/C:/work/apache-maven-3.0.3/repo/org/springframework/boot/spring-boot/1.0.0.RC1/spring-boot-1.0.0.RC1.jar, file:/C:/work/apache-maven-3.0.3/repo/org/springframework/spring-core/4.0.0.RELEASE/spring-core-4.0.0.RELEASE.jar, file:/C:/work/apache-maven-3.0.3/repo/org/springframework/spring-context/4.0.0.RELEASE/spring-context-4.0.0.RELEASE.jar, file:/C:/work/apache-maven-3.0.3/repo/org/springframework/boot/spring-boot-autoconfigure/1.0.0.RC1/spring-boot-autoconfigure-1.0.0.RC1.jar, file:/C:/work/apache-maven-3.0.3/repo/org/springframework/boot/spring-boot-starter-logging/1.0.0.RC1/spring-boot-starter-logging-1.0.0.RC1.jar, file:/C:/work/apache-maven-3.0.3/repo/org/slf4j/jcl-over-slf4j/1.7.5/jcl-over-slf4j-1.7.5.jar, file:/C:/work/apache-maven-3.0.3/repo/org/slf4j/slf4j-api/1.7.5/slf4j-api-1.7.5.jar, file:/C:/work/apache-maven-3.0.3/repo/org/slf4j/jul-to-slf4j/1.7.5/jul-to-slf4j-1.7.5.jar, file:/C:/work/apache-maven-3.0.3/repo/org/slf4j/log4j-over-slf4j/1.7.5/log4j-over-slf4j-1.7.5.jar, file:/C:/work/apache-maven-3.0.3/repo/ch/qos/logback/logback-classic/1.0.13/logback-classic-1.0.13.jar, file:/C:/work/apache-maven-3.0.3/repo/ch/qos/logback/logback-core/1.0.13/logback-core-1.0.13.jar, file:/C:/work/apache-maven-3.0.3/repo/org/springframework/boot/spring-boot-starter-web/1.0.0.RC1/spring-boot-starter-web-1.0.0.RC1.jar, file:/C:/work/apache-maven-3.0.3/repo/org/springframework/boot/spring-boot-starter-tomcat/1.0.0.RC1/spring-boot-starter-tomcat-1.0.0.RC1.jar, file:/C:/work/apache-maven-3.0.3/repo/org/apache/tomcat/embed/tomcat-embed-core/7.0.47/tomcat-embed-core-7.0.47.jar, file:/C:/work/apache-maven-3.0.3/repo/org/apache/tomcat/embed/tomcat-embed-logging-juli/7.0.47/tomcat-embed-logging-juli-7.0.47.jar, file:/C:/work/apache-maven-3.0.3/repo/org/springframework/spring-web/4.0.0.RELEASE/spring-web-4.0.0.RELEASE.jar, file:/C:/work/apache-maven-3.0.3/repo/aopalliance/aopalliance/1.0/aopalliance-1.0.jar, file:/C:/work/apache-maven-3.0.3/repo/org/springframework/spring-aop/4.0.0.RELEASE/spring-aop-4.0.0.RELEASE.jar, file:/C:/work/apache-maven-3.0.3/repo/org/springframework/spring-beans/4.0.0.RELEASE/spring-beans-4.0.0.RELEASE.jar, file:/C:/work/apache-maven-3.0.3/repo/org/springframework/spring-webmvc/4.0.0.RELEASE/spring-webmvc-4.0.0.RELEASE.jar, file:/C:/work/apache-maven-3.0.3/repo/org/springframework/spring-expression/4.0.0.RELEASE/spring-expression-4.0.0.RELEASE.jar, file:/C:/work/apache-maven-3.0.3/repo/com/fasterxml/jackson/core/jackson-databind/2.3.1/jackson-databind-2.3.1.jar, file:/C:/work/apache-maven-3.0.3/repo/com/fasterxml/jackson/core/jackson-annotations/2.3.0/jackson-annotations-2.3.0.jar, file:/C:/work/apache-maven-3.0.3/repo/com/fasterxml/jackson/core/jackson-core/2.3.1/jackson-core-2.3.1.jar, file:/C:/work/apache-maven-3.0.3/repo/commons-lang/commons-lang/2.2/commons-lang-2.2.jar]
Exception in thread "main" org.springframework.context.ApplicationContextException: Unable to start embedded container; nested exception is org.springframework.context.ApplicationContextException: Unable to start EmbeddedWebApplicationContext due to missing EmbeddedServletContainerFactory bean.
    at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.onRefresh(EmbeddedWebApplicationContext.java:140)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:476)
    at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:124)
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:658)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:355)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:920)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:909)
    at hu.kumite.Application.main(Application.java:17)
Caused by: org.springframework.context.ApplicationContextException: Unable to start EmbeddedWebApplicationContext due to missing EmbeddedServletContainerFactory bean.
    at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.getEmbeddedServletContainerFactory(EmbeddedWebApplicationContext.java:190)
    at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.createEmbeddedServletContainer(EmbeddedWebApplicationContext.java:163)
    at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.onRefresh(EmbeddedWebApplicationContext.java:137)
    ... 7 more

应用程序启动器类是这样的:

@ComponentScan
@EnableAutoConfiguration
public class Application {
    public static void main(String[] args) {
        SpringApplication.run(ScheduledTasks.class, args);
    }
}

如您所见,main方法包含注释行.我已经完成了一个教程,即这个教程:https://spring.io/guides/gs/consuming-rest/ 它已启动并运行.但我无法运行ScheduledTasks应用程序,具体如下:

@EnableScheduling
public class ScheduledTasks {

    private static final SimpleDateFormat dateFormat = new SimpleDateFormat("HH:mm:ss");

    @Scheduled(fixedRate = 5000)
    public void reportCurrentTime() {
        System.out.println("The time is now " + dateFormat.format(new Date()));
    }
}

我使用Eclipse并将Application.java的main作为Application运行.有人可以帮帮我吗？

Answer 1

调度指南不是一个Web应用程序,所以你可能在REST指南的pom.xml中有一些发霉的东西？如果您严格按照说明操作,它应该可行.您在上面发布的代码的另一个潜在问题是您的@EnableAutoConfiguration类不在上下文中使用,仅作为主要方法(这可能不是调度指南的问题,但它可能是针对其他一些问题).

Answer 2

该@SpringBootApplication节目扫描包含以下注释:

@Configuration
@ComponentScan
@EnableAutoConfiguration

所以你也可以这样做:

@SpringBootApplication
public class Application {
    public static void main(String[] args) {
       SpringApplication.run(ScheduledTasks.class, args);
    }
}

Answer 3

在你的pom.xml中使用这个:

<dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
</dependency>

或者这个:

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-tomcat</artifactId>
</dependency>

Answer 4

我在一个Spring Boot项目中有多个应用程序类,其中包含了Web,并希望避免为其中一个配置Web环境,因此我手动配置如下:

@SpringBootApplication
public class Application
{
    public static void main(String[] args)
    {
        new SpringApplicationBuilder(Application.class)
            .web(false)
            .run(args);
    }
}

UPDATE春季启动2及以上:

@SpringBootApplication
public class Application
{
    public static void main(String[] args)
    {
        new SpringApplicationBuilder(Application.class)
            .web(WebApplicationType.NONE)
            .run(args);
    }
}

Answer 5

试试这个

@Configuration
@ComponentScan
@EnableAutoConfiguration
public class Application {
    public static void main(String[] args) {
       SpringApplication.run(ScheduledTasks.class, args);
    }
}

Answer 6

该错误表明您尝试运行的应用程序无法实例化apache tomcat的实例.确保使用tomcat运行应用程序.

如果在检查完所有依赖项后遇到同样的问题,请尝试在配置类中添加以下内容

@Bean
public EmbeddedServletContainerFactory servletContainer() {
    TomcatEmbeddedServletContainerFactory factory = 
                  new TomcatEmbeddedServletContainerFactory();
    return factory;
 }

如果您正在使用tomcat的外部实例(特别是对于intellij),问题可能是IDE正在尝试启动嵌入式tomcat.在这种情况下,从pom.xml中删除以下内容,然后使用"编辑配置"向导配置外部tomcat.

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

Answer 7

加

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-web</artifactId>
</dependency>

Answer 8

如果您在使用intellij时遇到此异常,并且您尝试使用run按钮启动应用程序.尝试从命令行启动应用程序.例如,确保您位于正确的目录(带有您的pom文件的目录)中,假设这是一个springboot应用程序运行,mvn spring-boot:run这对我来说是个窍门.

此外,我还看到当您的spring应用程序依赖于另一个应用程序时会发生此错误.在这种情况下,我必须首先启动另一个应用程序然后运行.

Answer 9

添加注释@SpringBootApplication在入门类之前为我修复了这个问题(所以实际上,这个错误消息可能意味着"你没有@SpringBootApplication任何标记的类,你至少需要一个)

@SpringBootApplication
public class AppStarter {

    public static void main(String[] args) {
        SpringApplication.run(AppStarter.class, args);
    }
}