SSM使用maven插件的方式配置tomcat，启动不了，一切正常，tomcat也是绿色的√但是就是启动不成功！！！常见低级低级低级错误

<build>
    <plugins>
        <plugin>
            <groupId>org.apache.tomcat.maven</groupId>
            <artifactId>tomcat7-maven-plugin</artifactId>
            <version>2.2</version>
            <configuration>
                <uriEncoding>utf-8</uriEncoding>
                <path>/</path>
                <port>8080</port>
            </configuration>
        </plugin>
    </plugins>
</build>

启动后控制台信息

[INFO] Scanning for projects...
[INFO] 
[INFO] ------------------< org.example:springday13_ssm_crm >-------------------
[INFO] Building springday13_ssm_crm 1.0-SNAPSHOT
[INFO] --------------------------------[ jar ]---------------------------------
[INFO] 
[INFO] >>> tomcat7-maven-plugin:2.2:run (default-cli) > process-classes @ springday13_ssm_crm >>>
[INFO] 
[INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ springday13_ssm_crm ---
[WARNING] Using platform encoding (UTF-8 actually) to copy filtered resources, i.e. build is platform dependent!
[INFO] Copying 2 resources
[INFO] 
[INFO] --- maven-compiler-plugin:3.1:compile (default-compile) @ springday13_ssm_crm ---
[INFO] Nothing to compile - all classes are up to date
[INFO] 
[INFO] <<< tomcat7-maven-plugin:2.2:run (default-cli) < process-classes @ springday13_ssm_crm <<<
[INFO] 
[INFO] 
[INFO] --- tomcat7-maven-plugin:2.2:run (default-cli) @ springday13_ssm_crm ---
[INFO] Skipping non-war project
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  1.360 s
[INFO] Finished at: 2022-06-04T16:38:37+08:00
[INFO] ------------------------------------------------------------------------

Process finished with exit code 0

经过排查找到错误原因：

是没有设置其打成war包

<packaging>war</packaging>