将springboot项目部署到服务器的tomcat中无法访问

第一步：让启动类继承SpringBootServletInitializer，并重写configure方法，关键代码如下

@SpringBootApplication
public class MySpringBootApplication extends SpringBootServletInitializer {
    public static void main(String[] args) {
        SpringApplication.run(MySpringBootApplication.class);

    }
    @Override
    protected SpringApplicationBuilder configure(SpringApplicationBuilder builder) {
        return builder.sources(this.getClass());
    }
}

第二步：在pom文件中添加打包方式

<packaging>war</packaging>

第三步：在pom文件中去除自带的tomcat

<dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
            <!--移除内嵌的tomcat-->
            <exclusions>
                <exclusion>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-starter-tomcat</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <!--servlet的 api-->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <scope>provided</scope>
        </dependency>

第四步：在pom.xml文件中的maven插件中指定打包后的名字finalName

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

注意：打包后的名字要与虚拟路径一致。如application.properties中配置了server.servlet.context-path=/demo，则finalName中指定为demo.