学习记录：tomcat本地可以访问自己项目，Linux不能访问，只能访问tomcat首页

1.百度了很久，说是环境有问题，这边记录一个错误：
启动tomcat服务，查看Linux的logs catalina.out  命令：cat catalina.out 演示这边具体报错是：
INFO [localhost-startStop-2] org.apache.catalina.startup.HostConfig.deployWAR Deploying web application archive [/usr/local/mytomcat8/apache-tomcat-8.5.77/webapps/IoT.war]
18-Mar-2022 10:34:06.606 SEVERE [localhost-startStop-2] org.apache.catalina.core.ContainerBase.addChildInternal ContainerBase.addChild: start: 
	org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/IoT]]
		at org.apache.catalina.util.LifecycleBase.handleSubClassException(LifecycleBase.java:440)
		at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:198)
		at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:753)
		at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:727)
		at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:695)
		at org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:1016)
		at org.apache.catalina.startup.HostConfig$DeployWar.run(HostConfig.java:1903)
		at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
		at java.util.concurrent.FutureTask.run(FutureTask.java:262)
		at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
		at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
		at java.lang.Thread.run(Thread.java:745)
	Caused by: java.lang.UnsupportedClassVersionError: org/springframework/jdbc/core/JdbcTemplate : Unsupported major.minor version 52.0 (unable to load class [org.springframe