intellij idea 中 tomcat一直报端口冲突的错
报错信息：
"C:Tomcat 8.5bincatalina.bat" run [2021-01-09 12:20:34,474] Artifact test20210108:war exploded: Waiting for server connection to start artifact deployment... Using CATALINA_BASE: "C:UsersMJYAppDataLocalJetBrainsIntelliJIdea2020.1tomcatUnnamed_test20210108" Using CATALINA_HOME: "C:Tomcat 8.5" Using CATALINA_TMPDIR: "C:Tomcat 8.5temp" Using JRE_HOME: "C:Program FilesJavajdk1.8.0_131" Using CLASSPATH: "C:Tomcat 8.5binbootstrap.jar;C:Tomcat 8.5bintomcat-juli.jar" 09-Jan-2021 00:20:36.506 淇℃伅 [main] org.apache.catalina.startup.VersionLoggerListener.log Server.鏈嶅姟鍣ㄧ増鏈�: Apache Tomcat/8.5.49 09-Jan-2021 00:20:36.509 淇℃伅 [main] org.apache.catalina.startup.VersionLoggerListener.log 鏈嶅姟鍣ㄦ瀯寤�: Nov 17 2019 18:45:30 UTC 09-Jan-2021 00:20:36.509 淇℃伅 [main] org.apache.catalina.startup.VersionLoggerListener.log 鏈嶅姟鍣ㄧ増鏈彿(锛�8.5.49.0 09-Jan-2021 00:20:36.509 淇℃伅 [main] org.apache.catalina.startup.VersionLoggerListener.log OS Name: Windows 10 09-Jan-2021 00:20:36.509 淇℃伅 [main] org.apache.catalina.startup.VersionLoggerListener.log OS.鐗堟湰: 10.0 09-Jan-2021 00:20:36.509 淇℃伅 [main] org.apache.catalina.startup.VersionLoggerListener.log 鏋舵瀯: amd64 09-Jan-2021 00:20:36.509 淇℃伅 [main] org.apache.catalina.startup.VersionLoggerListener.log Java 鐜鍙橀噺: C:Program FilesJavajdk1.8.0_131jre 09-Jan-2021 00:20:36.510 淇℃伅 [main] org.apache.catalina.startup.VersionLoggerListener.log JVM 鐗堟湰: 1.8.0_131-b11 09-Jan-2021 00:20:36.510 淇℃伅 [main] org.apache.catalina.startup.VersionLoggerListener.log JVM.渚涘簲鍟�: Oracle Corporation 09-Jan-2021 00:20:36.510 淇℃伅 [main] org.apache.catalina.startup.VersionLoggerListener.log CATALINA_BASE: C:UsersMJYAppDataLocalJetBrainsIntelliJIdea2020.1tomcatUnnamed_test20210108 09-Jan-2021 00:20:36.510 淇℃伅 [main] org.apache.catalina.startup.VersionLoggerListener.log CATALINA_HOME: C:Tomcat 8.5 09-Jan-2021 00:20:36.510 淇℃伅 [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Djava.util.logging.config.file=C:UsersMJYAppDataLocalJetBrainsIntelliJIdea2020.1tomcatUnnamed_test20210108conflogging.properties 09-Jan-2021 00:20:36.511 淇℃伅 [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager 09-Jan-2021 00:20:36.511 淇℃伅 [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Dcom.sun.management.jmxremote= 09-Jan-2021 00:20:36.511 淇℃伅 [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Dcom.sun.management.jmxremote.port=1099 09-Jan-2021 00:20:36.511 淇℃伅 [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Dcom.sun.management.jmxremote.ssl=false 09-Jan-2021 00:20:36.511 淇℃伅 [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Dcom.sun.management.jmxremote.password.file=C:UsersMJYAppDataLocalJetBrainsIntelliJIdea2020.1tomcatUnnamed_test20210108jmxremote.password 09-Jan-2021 00:20:36.511 淇℃伅 [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Dcom.sun.management.jmxremote.access.file=C:UsersMJYAppDataLocalJetBrainsIntelliJIdea2020.1tomcatUnnamed_test20210108jmxremote.access 09-Jan-2021 00:20:36.511 淇℃伅 [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Djava.rmi.server.hostname=127.0.0.1 09-Jan-2021 00:20:36.512 淇℃伅 [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Djdk.tls.ephemeralDHKeySize=2048 09-Jan-2021 00:20:36.512 淇℃伅 [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Djava.protocol.handler.pkgs=org.apache.catalina.webresources 09-Jan-2021 00:20:36.512 淇℃伅 [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Dignore.endorsed.dirs= 09-Jan-2021 00:20:36.512 淇℃伅 [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Dcatalina.base=C:UsersMJYAppDataLocalJetBrainsIntelliJIdea2020.1tomcatUnnamed_test20210108 09-Jan-2021 00:20:36.512 淇℃伅 [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Dcatalina.home=C:Tomcat 8.5 09-Jan-2021 00:20:36.513 淇℃伅 [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Djava.io.tmpdir=C:Tomcat 8.5temp 09-Jan-2021 00:20:36.513 淇℃伅 [main] org.apache.catalina.core.AprLifecycleListener.lifecycleEvent The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: [C:Program FilesJavajdk1.8.0_131bin;C:WindowsSunJavabin;C:Windowssystem32;C:Windows;"C:ProgramDataOracleJavajavapath;C:Program FilesJavajdk1.8.0_131bin";C:Program Files (x86)InteliCLS Client;C:Program FilesInteliCLS Client;C:Windowssystem32;C:Windows;C:WindowsSystem32Wbem;C:WindowsSystem32WindowsPowerShellv1.0;C:WindowsSystem32OpenSSH;C:Program FilesMATLABR2017bruntimewin64;C:Program FilesMATLABR2017bbin;C:Program Files (x86)apache-maven-3.6.3bin;C:Program FilesGitcmd;C:UsersMJYAppDataLocalProgramsPythonPython38Scripts;C:UsersMJYAppDataLocalProgramsPythonPython38;C:Program FilesJetBrainsIntelliJ IDEA 2019.3.1bin;C:UsersMJYAppDataLocalProgramsMicrosoft VS Codebin;.] 09-Jan-2021 00:20:36.695 淇℃伅 [main] org.apache.coyote.AbstractProtocol.init 鍒濆鍖栧崗璁鐞嗗櫒 ["http-nio-8020"] 09-Jan-2021 00:20:36.717 淇℃伅 [main] org.apache.tomcat.util.net.NioSelectorPool.getSharedSelector Using a shared selector for servlet write/read 09-Jan-2021 00:20:36.752 淇℃伅 [main] org.apache.coyote.AbstractProtocol.init 鍒濆鍖栧崗璁鐞嗗櫒 ["ajp-nio-8009"] 09-Jan-2021 00:20:36.756 淇℃伅 [main] org.apache.tomcat.util.net.NioSelectorPool.getSharedSelector Using a shared selector for servlet write/read 09-Jan-2021 00:20:36.758 淇℃伅 [main] org.apache.catalina.startup.Catalina.load Initialization processed in 948 ms 09-Jan-2021 00:20:36.954 淇℃伅 [main] org.apache.catalina.core.StandardService.startInternal Starting service [Catalina] 09-Jan-2021 00:20:36.954 淇℃伅 [main] org.apache.catalina.core.StandardEngine.startInternal Starting Servlet Engine: Apache Tomcat/8.5.49 09-Jan-2021 00:20:36.967 淇℃伅 [main] org.apache.coyote.AbstractProtocol.start 寮�濮嬪崗璁鐞嗗彞鏌刐"http-nio-8020"] 09-Jan-2021 00:20:36.991 淇℃伅 [main] org.apache.coyote.AbstractProtocol.start 寮�濮嬪崗璁鐞嗗彞鏌刐"ajp-nio-8009"] 09-Jan-2021 00:20:36.995 淇℃伅 [main] org.apache.catalina.startup.Catalina.start Server startup in 236 ms 09-Jan-2021 00:20:36.996 涓ラ噸 [main] org.apache.catalina.core.StandardServer.await StandardServer.await: create[localhost:8020]: java.net.BindException: Address already in use: JVM_Bind at java.net.DualStackPlainSocketImpl.bind0(Native Method) at java.net.DualStackPlainSocketImpl.socketBind(DualStackPlainSocketImpl.java:106) at java.net.AbstractPlainSocketImpl.bind(AbstractPlainSocketImpl.java:387) at java.net.PlainSocketImpl.bind(PlainSocketImpl.java:190) at java.net.ServerSocket.bind(ServerSocket.java:375) at java.net.ServerSocket.(ServerSocket.java:237) at org.apache.catalina.core.StandardServer.await(StandardServer.java:421) at org.apache.catalina.startup.Catalina.await(Catalina.java:776) at org.apache.catalina.startup.Catalina.start(Catalina.java:722) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:343) at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:474) 09-Jan-2021 00:20:36.998 淇℃伅 [main] org.apache.coyote.AbstractProtocol.pause Pausing ProtocolHandler ["http-nio-8020"] 09-Jan-2021 00:20:37.753 淇℃伅 [main] org.apache.coyote.AbstractProtocol.pause Pausing ProtocolHandler ["ajp-nio-8009"] 09-Jan-2021 00:20:38.569 淇℃伅 [main] org.apache.catalina.core.StandardService.stopInternal 姝ｅ湪鍋滄鏈嶅姟[Catalina] 09-Jan-2021 00:20:38.571 淇℃伅 [main] org.apache.coyote.AbstractProtocol.stop 姝ｅ湪鍋滄ProtocolHandler ["http-nio-8020"] 09-Jan-2021 00:20:38.573 淇℃伅 [main] org.apache.coyote.AbstractProtocol.stop 姝ｅ湪鍋滄ProtocolHandler ["ajp-nio-8009"] 09-Jan-2021 00:20:38.576 淇℃伅 [main] org.apache.coyote.AbstractProtocol.destroy 姝ｅ湪鎽ф瘉鍗忚澶勭悊鍣� ["http-nio-8020"] 09-Jan-2021 00:20:38.577 淇℃伅 [main] org.apache.coyote.AbstractProtocol.destroy 姝ｅ湪鎽ф瘉鍗忚澶勭悊鍣� ["ajp-nio-8009"] Disconnected from server
原本我tomcat的端口号设置的是8080.
遇到问题后我进行了以下措施：
1.cmd -> netstat -ano查看本地地址（或者直接打开任务管理器查看PID），但并没有一样的8080端口号进程
2.结束所有任务重启，没用
3.检查tomcat在intellij idea中的配置是否正确
4.修改tomcat安装路径下conf文件夹下service.xml中的端口号，并在idea同步修改端口号
不要改错位置！是这里Connector的port！我后来改成了8042.最终成功了。
之前一直改的是server的port，就一直启动tomcat失败…低级错误。
补充：intellij idea配置tomcat
-
打开edit Configurations - Tomcat Server[local]
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在文件夹中选中相应的tomcat
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配置端口号以及其他信息：
-
在Deployment中将项目部署进去
此时返回server页面可以看到url自动补上了项目地址。
完事！
遗留问题【已解决】
Q: 我看到大佬们这里url都是配到端口号/项目地址就结束。我觉得没错就应该这样配置。
但是我要是这样配置我启动tomcat后跳转页面不能显示index.jsp而是404.
A:解决了！
逻辑：404原因找不到index.jsp,配了以后肯定能够跳转了，但是不用特地配的原因是：springmvc默认的首页面就是index.jsp,启动tomcat后自动打开该页面。
那为啥我的index.jsp没能被当作默认首页面呢？哪里不一样呢？
的确不一样。。。因为没有框架自带的index文件中没有首行utf-8，当有中文时候会出现乱码，所以我！自！己！删！掉！原！来！的！index！并！且！重！新！创！建！了！一！个！index！牛逼啊。但为啥文件名一样会被当做不同的文件我不太明白。
