SpringBoot 启动报错 Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContex

SpringBoot 项目启动是报如下错误：

Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Tomcat].StandardHost[localhost]]
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:167)
	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1421)
	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1411)
	at java.util.concurrent.FutureTask.run$$$capture(FutureTask.java:266)
	at java.util.concurrent.FutureTask.run(FutureTask.java)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
Caused by: org.apache.catalina.LifecycleException: A child container failed during start
	at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:949)
	at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:872)
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
	... 7 common frames omitted

解决方案

方案一：pom文件中加入serverlet-api依赖

<dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>javax.servlet-api</artifactId>
      <version>3.1.0</version>
      <scope>provided</scope>
 </dependency>

方案二：修改pom文件的依赖顺序【新建的SpringBoot项目肯定内置依赖了serverlet的，我新加入的其它依赖放到了spring-boot-starter-web 的前面，导致报错】

报错之前的pom顺序：

<!--minio 文件存储-->
<dependency>
    <groupId>io.minio</groupId>
    <artifactId>minio</artifactId>
    <version>3.0.10</version>
</dependency>
<dependency>
    <groupId>org.owasp.esapi</groupId>
    <artifactId>esapi</artifactId>
    <version>2.1.0</version>
</dependency>

<!--netty相关-->
<dependency>
    <groupId>io.netty</groupId>
    <artifactId>netty-all</artifactId>
    <version>4.1.36.Final</version>
</dependency>
<!--kafka-clients-->
<dependency>
    <groupId>org.apache.kafka</groupId>
    <artifactId>kafka-clients</artifactId>
    <version>2.6.2</version>
</dependency>
<!--kafka-clients-->
<dependency>
    <groupId>org.apache.kafka</groupId>
    <artifactId>kafka-streams</artifactId>
    <version>2.6.2</version>
</dependency>
<!--下面是新建的SpringBoot项目配置文件-->
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter</artifactId>
</dependency>
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-web</artifactId>
    <exclusions>
        <exclusion>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-log4j12</artifactId>
        </exclusion>
    </exclusions>
</dependency>
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-test</artifactId>
    <scope>test</scope>
    <exclusions>
        <exclusion>
            <groupId>org.junit.vintage</groupId>
            <artifactId>junit-vintage-engine</artifactId>
        </exclusion>
    </exclusions>
</dependency>
<!--spring-cloud-stream-->
<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-stream</artifactId>
</dependency>
<!--rocketMQ-->
<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-stream-binder-rocketmq</artifactId>
    <version>0.2.1.RELEASE</version>
</dependency>
<!--lombok-->
<dependency>
    <groupId>org.projectlombok</groupId>
    <artifactId>lombok</artifactId>
    <optional>true</optional>
</dependency>
<dependency>
    <groupId>junit</groupId>
    <artifactId>junit</artifactId>
</dependency>

修改后的正确顺序：

 <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter</artifactId>
  </dependency>
  <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-web</artifactId>
      <exclusions>
          <exclusion>
              <groupId>org.slf4j</groupId>
              <artifactId>slf4j-log4j12</artifactId>
          </exclusion>
      </exclusions>
  </dependency>
  <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-test</artifactId>
      <scope>test</scope>
      <exclusions>
          <exclusion>
              <groupId>org.junit.vintage</groupId>
              <artifactId>junit-vintage-engine</artifactId>
          </exclusion>
      </exclusions>
  </dependency>
  <!--spring-cloud-stream-->
  <dependency>
      <groupId>org.springframework.cloud</groupId>
      <artifactId>spring-cloud-stream</artifactId>
  </dependency>
  <!--rocketMQ-->
  <dependency>
      <groupId>org.springframework.cloud</groupId>
      <artifactId>spring-cloud-stream-binder-rocketmq</artifactId>
      <version>0.2.1.RELEASE</version>
  </dependency>
  <!--lombok-->
  <dependency>
      <groupId>org.projectlombok</groupId>
      <artifactId>lombok</artifactId>
      <optional>true</optional>
  </dependency>
  <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
  </dependency>

  <!--minio 文件存储-->
  <dependency>
      <groupId>io.minio</groupId>
      <artifactId>minio</artifactId>
      <version>3.0.10</version>
  </dependency>
  <dependency>
      <groupId>org.owasp.esapi</groupId>
      <artifactId>esapi</artifactId>
      <version>2.1.0</version>
  </dependency>

  <!--netty相关-->
  <dependency>
      <groupId>io.netty</groupId>
      <artifactId>netty-all</artifactId>
      <version>4.1.36.Final</version>
  </dependency>
  <!--kafka-clients-->
  <dependency>
      <groupId>org.apache.kafka</groupId>
      <artifactId>kafka-clients</artifactId>
      <version>2.6.2</version>
  </dependency>
  <!--kafka-clients-->
  <dependency>
      <groupId>org.apache.kafka</groupId>
      <artifactId>kafka-streams</artifactId>
      <version>2.6.2</version>
  </dependency>