springboot出现 Failed to start component [StandardEngine[Tomcat].StandardHost[localhost]]

springboot出现Failed to start component [StandardEngine[Tomcat].StandardHost[localhost]]，也就是tomcat启动不起来，

原因：可能是 servlet-api-x.x.jar冲突，原来我在pom.xml中配置了

    <dependency>
    <groupId>javax.servlet</groupId>
    <artifactId>jsp-api</artifactId>
    <version>2.0</version>
    <scope>provided</scope>
    </dependency>
    <dependency>
    <groupId>javax.servlet</groupId>
    <artifactId>jstl</artifactId>
    <version>1.2</version>
</dependency>

这样的javax.servlet,导致与springboot内嵌的tomcat的javax.servlet冲突，所以报错，

解决办法：删除上述jar包引入即可