Unable to start web server; nested exception is org.springframework.context.ApplicationContextException

項目報錯：Unable to start web server; nested exception is org.springframework.context.ApplicationContextException

解決方案一

<!-- 使用嵌入式Jetty作為web container -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
            <exclusions>
                <exclusion>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-starter-tomcat</artifactId>
                </exclusion>
            </exclusions>
        </dependency>

解決方案二

出現了這個異常，
只要再pom文件里加上對應的 container deps: 

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