启动 tomcat 上下文的 Spring-boot 错误。创建名为“servletEndpointRegistrar”的 bean 时出错答案

【问题标题】：Spring-boot error starting tomcat context. Error creating bean with name 'servletEndpointRegistrar'启动 tomcat 上下文的 Spring-boot 错误。创建名为“servletEndpointRegistrar”的 bean 时出错
【发布时间】：2019-07-10 07:36:51
【问题描述】：

我是弹簧靴的新手。因此，在从 spring initializr 引导一个项目之后，我试图在 intellij 上运行它。但是我在启动时遇到了错误。

以下是版本：
Java : 8
春季启动：2.0.6
我曾尝试更改 spring boot 版本，但没有帮助。
还更改了 application.properties 中的服务器端口，但这也没有帮助。

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" 
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.0.6.RELEASE</version>
    <relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>ghosh.debarshi</groupId>
<artifactId>spring5webapp</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>spring5webapp</name>
<description>Demo project for Spring Boot</description>

<properties>
    <java.version>1.8</java.version>
</properties>

<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-actuator</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-data-jpa</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-thymeleaf</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
        <scope>test</scope>
    </dependency>
</dependencies>

<build>
    <plugins>
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
        </plugin>
    </plugins>
</build>

堆栈跟踪：

   Description:

Failed to configure a DataSource: 'url' attribute is not specified and no embedded datasource could be configured.

Reason: Failed to determine a suitable driver class


Action:

Consider the following:
        If you want an embedded database (H2, HSQL or Derby), please put it on the classpath.
        If you have database settings to be loaded from a particular profile you may need to activate it (no profiles are currently active).

[WARNING] 
java.lang.reflect.InvocationTargetException
    at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
    at jdk.internal.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:62)
    at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke (Method.java:566)
    at org.springframework.boot.maven.AbstractRunMojo$LaunchRunner.run (AbstractRunMojo.java:497)
    at java.lang.Thread.run (Thread.java:834)
Caused by: org.springframework.context.ApplicationContextException: Unable to start web server; nested exception is org.springframework.boot.web.server.WebServerException: Unable to start embedded Tomcat
    at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.onRefresh (ServletWebServerApplicationContext.java:155)
    at org.springframework.context.support.AbstractApplicationContext.refresh (AbstractApplicationContext.java:542)
    at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh (ServletWebServerApplicationContext.java:140)
    at org.springframework.boot.SpringApplication.refresh (SpringApplication.java:754)
    at org.springframework.boot.SpringApplication.refreshContext (SpringApplication.java:386)
    at org.springframework.boot.SpringApplication.run (SpringApplication.java:307)
    at org.springframework.boot.SpringApplication.run (SpringApplication.java:1242)
    at org.springframework.boot.SpringApplication.run (SpringApplication.java:1230)
    at ghosh.debarshi.spring5webapp.Spring5webappApplication.main (Spring5webappApplication.java:10)
    at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
    at jdk.internal.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:62)
    at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke (Method.java:566)
    at org.springframework.boot.maven.AbstractRunMojo$LaunchRunner.run (AbstractRunMojo.java:497)
    at java.lang.Thread.run (Thread.java:834)
Caused by: org.springframework.boot.web.server.WebServerException: Unable to start embedded Tomcat
    at org.springframework.boot.web.embedded.tomcat.TomcatWebServer.initialize (TomcatWebServer.java:126)
    at org.springframework.boot.web.embedded.tomcat.TomcatWebServer.<init> (TomcatWebServer.java:86)
    at org.springframework.boot.web.embedded.tomcat.TomcatServletWebServerFactory.getTomcatWebServer (TomcatServletWebServerFactory.java:413)
    at org.springframework.boot.web.embedded.tomcat.TomcatServletWebServerFactory.getWebServer (TomcatServletWebServerFactory.java:174)
    at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.createWebServer (ServletWebServerApplicationContext.java:179)
    at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.onRefresh (ServletWebServerApplicationContext.java:152)
    at org.springframework.context.support.AbstractApplicationContext.refresh (AbstractApplicationContext.java:542)
    at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh (ServletWebServerApplicationContext.java:140)
    at org.springframework.boot.SpringApplication.refresh (SpringApplication.java:754)
    at org.springframework.boot.SpringApplication.refreshContext (SpringApplication.java:386)
    at org.springframework.boot.SpringApplication.run (SpringApplication.java:307)
    at org.springframework.boot.SpringApplication.run (SpringApplication.java:1242)
    at org.springframework.boot.SpringApplication.run (SpringApplication.java:1230)
    at ghosh.debarshi.spring5webapp.Spring5webappApplication.main (Spring5webappApplication.java:10)
    at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
    at jdk.internal.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:62)
    at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke (Method.java:566)
    at org.springframework.boot.maven.AbstractRunMojo$LaunchRunner.run (AbstractRunMojo.java:497)
    at java.lang.Thread.run (Thread.java:834)
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'servletEndpointRegistrar' defined in class path resource [org/springframework/boot/actuate/autoconfigure/endpoint/web/ServletEndpointManagementContextConfiguration$WebMvcServletEndpointManagementContextConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.boot.actuate.endpoint.web.ServletEndpointRegistrar]: Factory method 'servletEndpointRegistrar' threw exception; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'healthEndpoint' defined in class path resource [org/springframework/boot/actuate/autoconfigure/health/HealthEndpointConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.boot.actuate.health.HealthEndpoint]: Factory method 'healthEndpoint' threw exception; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.boot.actuate.autoconfigure.jdbc.DataSourceHealthIndicatorAutoConfiguration': Bean instantiation via constructor failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.boot.actuate.autoconfigure.jdbc.DataSourceHealthIndicatorAutoConfiguration$$EnhancerBySpringCGLIB$$83c4f158]: Constructor threw exception; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'dataSource' defined in class path resource [org/springframework/boot/autoconfigure/jdbc/DataSourceConfiguration$Hikari.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.zaxxer.hikari.HikariDataSource]: Factory method 'dataSource' threw exception; nested exception is org.springframework.boot.autoconfigure.jdbc.DataSourceProperties$DataSourceBeanCreationException: Failed to determine a suitable driver class

【问题讨论】：

可以粘贴 application.properties 代码吗？
application.properties 当前为空。未配置数据源。
尝试移除 jpa 依赖，希望能成功
嗯，确实如此。谢谢。新手错误。
我将其粘贴为答案，接受并投票。谢谢！

标签： spring-boot tomcat

【解决方案1】：

由于您尚未向此项目添加任何数据库，请从您的 pom.xml 文件中删除 data-jpa 依赖项，
它正在造成依赖冲突。
删除后即可正常运行。

【讨论】：

【解决方案2】：

你可以做两件事来解决这个问题：

从 pom.xml 中删除数据源依赖项。
第二个是您可以在 application.properties 中配置数据源。

如下图..

spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
spring.datasource.url=jdbc:mysql://localhost:3306/schema
spring.datasource.username=....?
spring.datasource.password=...?

【讨论】：

【解决方案3】：

您需要添加数据库配置或从 porm.xml 中删除数据库依赖项。添加数据库依赖项后，您需要添加如下配置。

    spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
    spring.datasource.username=mysqluser
    spring.datasource.password=mysqlpass
    spring.datasource.url=
    jdbc:mysql://localhost:3306/myDb?createDatabaseIfNotExist=true

【讨论】：