问题描述：刚开始学习maven，在idea中使用模板创建了web maven项目后，可以使用maven自带的maven tomcat运行，并且浏览器正常
。但是使用网站下载下来的Tomcat配置在项目中后，虽然可以运行，但浏览器直接显示
404错误。
下载的Tomcat运行后的信息：
G:\Web\Tomcat\apache-tomcat-8.5.51-windows-x64\apache-tomcat-8.5.51\bin\catalina.bat run
[2020-02-17 12:39:19,204] Artifact ren:war exploded: Waiting for server connection to start artifact deployment...
Using CATALINA_BASE: "C:\Users\Ren Yongchuang.IntelliJIdea2018.1\system\tomcat\Unnamed_ren_5"
Using CATALINA_HOME: "G:\Web\Tomcat\apache-tomcat-8.5.51-windows-x64\apache-tomcat-8.5.51"
Using CATALINA_TMPDIR: "G:\Web\Tomcat\apache-tomcat-8.5.51-windows-x64\apache-tomcat-8.5.51\temp"
Using JRE_HOME: "C:\Program Files\Java\jdk1.8.0_181"
Using CLASSPATH: "G:\Web\Tomcat\apache-tomcat-8.5.51-windows-x64\apache-tomcat-8.5.51\bin\bootstrap.jar;G:\Web\Tomcat\apache-tomcat-8.5.51-windows-x64\apache-tomcat-8.5.51\bin\tomcat-juli.jar"
17-Feb-2020 12:39:20.431 信息 [main] org.apache.catalina.startup.VersionLoggerListener.log Server.服务器版本: Apache Tomcat/8.5.51
17-Feb-2020 12:39:20.436 信息 [main] org.apache.catalina.startup.VersionLoggerListener.log 服务器构建: Feb 5 2020 22:26:25 UTC
17-Feb-2020 12:39:20.436 信息 [main] org.apache.catalina.startup.VersionLoggerListener.log 服务器版本号(：8.5.51.0
17-Feb-2020 12:39:20.436 信息 [main] org.apache.catalina.startup.VersionLoggerListener.log OS Name: Windows 10
17-Feb-2020 12:39:20.437 信息 [main] org.apache.catalina.startup.VersionLoggerListener.log OS.版本: 10.0
17-Feb-2020 12:39:20.437 信息 [main] org.apache.catalina.startup.VersionLoggerListener.log 架构: amd64
17-Feb-2020 12:39:20.437 信息 [main] org.apache.catalina.startup.VersionLoggerListener.log Java 环境变量: C:\Program Files\Java\jdk1.8.0_181\jre
17-Feb-2020 12:39:20.437 信息 [main] org.apache.catalina.startup.VersionLoggerListener.log JVM 版本: 1.8.0_181-b13
17-Feb-2020 12:39:20.437 信息 [main] org.apache.catalina.startup.VersionLoggerListener.log JVM.供应商: Oracle Corporation
17-Feb-2020 12:39:20.437 信息 [main] org.apache.catalina.startup.VersionLoggerListener.log CATALINA_BASE: C:\Users\Ren Yongchuang.IntelliJIdea2018.1\system\tomcat\Unnamed_ren_5
17-Feb-2020 12:39:20.438 信息 [main] org.apache.catalina.startup.VersionLoggerListener.log CATALINA_HOME: G:\Web\Tomcat\apache-tomcat-8.5.51-windows-x64\apache-tomcat-8.5.51
17-Feb-2020 12:39:20.438 信息 [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Djava.util.logging.config.file=C:\Users\Ren Yongchuang.IntelliJIdea2018.1\system\tomcat\Unnamed_ren_5\conf\logging.properties
17-Feb-2020 12:39:20.439 信息 [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager
17-Feb-2020 12:39:20.439 信息 [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Dcom.sun.management.jmxremote=
17-Feb-2020 12:39:20.439 信息 [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Dcom.sun.management.jmxremote.port=1099
17-Feb-2020 12:39:20.439 信息 [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Dcom.sun.management.jmxremote.ssl=false
17-Feb-2020 12:39:20.440 信息 [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Dcom.sun.management.jmxremote.authenticate=false
17-Feb-2020 12:39:20.440 信息 [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Djava.rmi.server.hostname=127.0.0.1
17-Feb-2020 12:39:20.440 信息 [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Djdk.tls.ephemeralDHKeySize=2048
17-Feb-2020 12:39:20.440 信息 [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Djava.protocol.handler.pkgs=org.apache.catalina.webresources
17-Feb-2020 12:39:20.440 信息 [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Dignore.endorsed.dirs=
17-Feb-2020 12:39:20.440 信息 [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Dcatalina.base=C:\Users\Ren Yongchuang.IntelliJIdea2018.1\system\tomcat\Unnamed_ren_5
17-Feb-2020 12:39:20.441 信息 [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Dcatalina.home=G:\Web\Tomcat\apache-tomcat-8.5.51-windows-x64\apache-tomcat-8.5.51
17-Feb-2020 12:39:20.442 信息 [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Djava.io.tmpdir=G:\Web\Tomcat\apache-tomcat-8.5.51-windows-x64\apache-tomcat-8.5.51\temp
17-Feb-2020 12:39:20.442 信息 [main] org.apache.catalina.core.AprLifecycleListener.lifecycleEvent Loaded APR based Apache Tomcat Native library [1.2.23] using APR version [1.7.0].
17-Feb-2020 12:39:20.442 信息 [main] org.apache.catalina.core.AprLifecycleListener.lifecycleEvent APR capabilities: IPv6 [true], sendfile [true], accept filters [false], random [true].
17-Feb-2020 12:39:20.442 信息 [main] org.apache.catalina.core.AprLifecycleListener.lifecycleEvent APR/OpenSSL配置：useAprConnector[false]，useOpenSSL[true]
17-Feb-2020 12:39:20.449 信息 [main] org.apache.catalina.core.AprLifecycleListener.initializeSSL OpenSSL successfully initialized [OpenSSL 1.1.1c 28 May 2019]
17-Feb-2020 12:39:20.614 信息 [main] org.apache.coyote.AbstractProtocol.init 初始化协议处理器 ["http-nio-8080"]
17-Feb-2020 12:39:20.632 信息 [main] org.apache.tomcat.util.net.NioSelectorPool.getSharedSelector Using a shared selector for servlet write/read
17-Feb-2020 12:39:20.658 信息 [main] org.apache.catalina.startup.Catalina.load Initialization processed in 647 ms
17-Feb-2020 12:39:20.702 信息 [main] org.apache.catalina.core.StandardService.startInternal Starting service [Catalina]
17-Feb-2020 12:39:20.702 信息 [main] org.apache.catalina.core.StandardEngine.startInternal Starting Servlet Engine: Apache Tomcat/8.5.51
17-Feb-2020 12:39:20.715 信息 [main] org.apache.coyote.AbstractProtocol.start 开始协议处理句柄["http-nio-8080"]
17-Feb-2020 12:39:20.727 信息 [main] org.apache.catalina.startup.Catalina.start Server startup in 68 ms
Connected to server
[2020-02-17 12:39:20,850] Artifact ren:war exploded: Artifact is being deployed, please wait...
[2020-02-17 12:39:21,376] Artifact ren:war exploded: Artifact is deployed successfully
[2020-02-17 12:39:21,376] Artifact ren:war exploded: Deploy took 526 milliseconds
17-Feb-2020 12:39:30.722 信息 [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory 把web 应用程序部署到目录 [G:\Web\Tomcat\apache-tomcat-8.5.51-windows-x64\apache-tomcat-8.5.51\webapps\manager]
17-Feb-2020 12:39:30.809 信息 [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deployment of web application directory [G:\Web\Tomcat\apache-tomcat-8.5.51-windows-x64\apache-tomcat-8.5.51\webapps\manager] has finished in [86] ms
配置页面
运行后的结果
