解決Springboot部署到webapps下訪問404

首先，啟動類需要重寫：

@Override
protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {
    return application.sources(ApplicationRun.class);
}
pom.xml需要添加：

<packaging>war</packaging>

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-tomcat</artifactId>
    <scope>provided</scope>
</dependency>