找不到 Spring Boot Tomcat 类

Question

我正在将我的 Spring 项目迁移到 Spring Boot。 但是，当我运行应用程序时，我得到了这个异常

19:09:31.059 [QUIET] [system.out] Caused by: java.lang.NoClassDefFoundError: org/apache/coyote/http11/AbstractHttp11JsseProtocol
19:09:31.059 [QUIET] [system.out]     at java.lang.Class.getDeclaredMethods0(Native Method)
19:09:31.059 [QUIET] [system.out]     at java.lang.Class.privateGetDeclaredMethods(Class.java:2701)
19:09:31.059 [QUIET] [system.out]     at java.lang.Class.getDeclaredMethods(Class.java:1975)
19:09:31.059 [QUIET] [system.out]     at org.springframework.util.ReflectionUtils.getDeclaredMethods(ReflectionUtils.java:613)
19:09:31.059 [QUIET] [system.out]     at org.springframework.util.ReflectionUtils.doWithLocalMethods(ReflectionUtils.java:489)
19:09:31.059 [QUIET] [system.out]     at org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor.buildPersistenceMetadata(PersistenceAnnotationBeanPostProcessor.java:431)
19:09:31.060 [QUIET] [system.out]     at org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor.findPersistenceMetadata(PersistenceAnnotationBeanPostProcessor.java:397)
19:09:31.060 [QUIET] [system.out]     ... 19 common frames omitted
19:09:31.060 [QUIET] [system.out] Caused by: java.lang.ClassNotFoundException: org.apache.coyote.http11.AbstractHttp11JsseProtocol
19:09:31.060 [QUIET] [system.out]     at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
19:09:31.060 [QUIET] [system.out]     at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
19:09:31.060 [QUIET] [system.out]     at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
19:09:31.060 [QUIET] [system.out]     at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
19:09:31.060 [QUIET] [system.out]     ... 26 common frames omitted

我在我的 SpringApplication 类中使用它

@SpringBootApplication
@ComponentScan(basePackages = "com.app")
public class MyApplication extends SpringBootServletInitializer {

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

    @Override
    protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {
        return application;
    }

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

关于我为什么会遇到此问题以及如何解决此问题的任何想法？

这是我的毕业作品：

compile('org.springframework.boot:spring-boot-starter-web')
compile group: 'org.springframework.boot', name: 'spring-boot-starter-tomcat', version: '1.5.3.RELEASE'
compile 'org.apache.tomcat:catalina:6.0.53'
compile 'org.apache.tomcat:coyote:6.0.53'

Answer 1

你需要更新你的maven依赖，尝试执行：

mvn install 或 mvn package

这将执行一个完整的maven生命周期。

你也可以看看这里：

Maven: Command to update repository after adding dependency to POM

Answer 2

删除：

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

替换：

    @Override
    protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {
        return application;
    }

与：

    @Override
    protected SpringApplicationBuilder configure(SpringApplicationBuilder builder) {
        return builder.sources(MyApplication.class);
    }

spring-boot-starter-web 工件引入了spring-boot-starter-tomcat，因此无需将其显式包含在您的 gradle 文件中，请也将其删除。

删除：

compile 'org.apache.tomcat:catalina:6.0.53'
compile 'org.apache.tomcat:coyote:6.0.53'

让spring-boot-starter-tomcat（这是spring-boot-starter-web的传递依赖）在使用Spring Boot1.5.3.RELEASE时带上支持的Tomcat、8.5.14版本。