将项目打成war包然后发布，考虑到打包的速度以及发布的速度（因为可能不止一个项目同时启动，而每个项目中可能都存在相同的jar包）， 将项目中的lib下的jar包合并到Tomcat中lib文件夹下，统一部署。
但是随之可能产生的问题（异常信息部分如下）：
严重: A child container failed during start
java.util.concurrent.ExecutionException: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[]]
at java.util.concurrent.FutureTask.report(Unknown Source)
at java.util.concurrent.FutureTask.get(Unknown Source)
at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:1119)
at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:819)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:145)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1571)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1561)
at java.util.concurrent.FutureTask.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[]]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:162)
... 6 more
Caused by: java.lang.NoSuchMethodError: javax.servlet.ServletContext.getClassLoader()Ljava/lang/ClassLoader;
at org.apache.catalina.startup.WebappServiceLoader.load(WebappServiceLoader.java:96)
at org.apache.catalina.startup.ContextConfig.processServletContainerInitializers(ContextConfig.java:1579)
at org.apache.catalina.startup.ContextConfig.webConfig(ContextConfig.java:1280)
at org.apache.catalina.startup.ContextConfig.configureStart(ContextConfig.java:888)
at org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:388)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:117)
at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:90)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5522)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:145)
... 6 more
三月 21, 2018 9:44:25 上午 org.apache.catalina.core.ContainerBase startInternal
解决方法：将Tomcat下lib包中的servlet-api.jar,复制到C:\Program Files\Java\jre1.8.0_144\lib\ext 下
