关于tomcat部署应用无法访问前端页面的问题

最近在做实训项目的时候使用到了 ssm框架，在项目环境搭建好后，运行程序时，一直遇到页面访问404错误。

项目运行日志如下：

十一月 13, 2020 11:56:07 上午 org.apache.catalina.core.aprlifecyclelistener init
信息: the apr based apache tomcat native library which allows optimal performance in production environments was not found on the java.library.path: d:\java\jdk\bin;c:\windows\sun\java\bin;c:\windows\system32;c:\windows;d:/java/jdk/bin/../jre/bin/server;d:/java/jdk/bin/../jre/bin;d:/java/jdk/bin/../jre/lib/amd64;d:\java\jdk\bin;d:\java\jre\bin;d:\ernv\gradle\gradle-6.6.1-all\gradle-6.6.1\bin;c:\sqlite3;c:\programdata\oracle\java\javapath;c:\program files (x86)\intel\intel(r) management engine components\icls\;c:\program files\intel\intel(r) management engine components\icls\;c:\windows\system32;c:\windows;c:\windows\system32\wbem;c:\windows\system32\windowspowershell\v1.0\;c:\windows\system32\openssh\;c:\program files (x86)\intel\intel(r) management engine components\dal;c:\program files\intel\intel(r) management engine components\dal;c:\program files\intel\wifi\bin\;c:\program files\common files\intel\wirelesscommon\;c:\program files (x86)\nvidia corporation\physx\common;c:\program files (x86)\microsoft sql server\100\tools\binn\;c:\program files\microsoft sql server\100\tools\binn\;c:\program files\microsoft sql server\100\dts\binn\;d:\python\scripts;d:\爬虫所需软件\数据库\;d:\git\cmd;d:\bin;c:\program files (x86)\microsoft sql server\110\tools\binn\;c:\program files\microsoft sql server\110\tools\binn\;c:\program files\microsoft sql server\110\dts\binn\;d:\mysql\mysql server 5.5\bin;d:\python;c:\program files\*\*.exe;d:\tools\myblog\node-v12.1.0-win-x64;d:\tools\myblog\node-v12.1.0-win-x64\node-global;d:\tools\myblog\node-v12.1.0-win-x64\node-global\node_modules\hexo\node_modules\.bin;d:\ernv\java\apache-maven-3.6.3-bin\apache-maven-3.6.3\bin;d:\ernv\lib\opencv\opencv3.4.2\opencv3.4.2\windowsoft\opencv\build\x64\vc15\bin;i:\软件安装包\mrunit\windows系统hadoop插件-winutilsmaster\winutils-master\hadoop-2.6.3\bin;c:\users\erbin\appdata\local\microsoft\windowsapps;d:\programtool\bytool\pycharm 2018.3.2\bin;d:\爬虫所需软件\数据库\mysql-5.6.43-winx64\bin;d:\tools\programs\fiddler;d:\ide\jetbrains\idea 2020.1\intellij idea 2020.1\bin;c:\users\erbin\appdata\local\pandoc\;d:\go\idea\goland 2020.1\bin;d:\eclipse-jee-neon-3-win32-x86_64\eclipse;;.
十一月 13, 2020 11:56:07 上午 org.apache.tomcat.util.digester.setpropertiesrule begin
警告: [setpropertiesrule]{server/service/engine/host/context} setting property 'source' to 'org.eclipse.jst.j2ee.server:crmsystem' did not find a matching property.
十一月 13, 2020 11:56:08 上午 org.apache.coyote.abstractprotocol init
信息: initializing protocolhandler ["http-nio-8080"]
十一月 13, 2020 11:56:08 上午 org.apache.tomcat.util.net.nioselectorpool getsharedselector
信息: using a shared selector for servlet write/read
十一月 13, 2020 11:56:08 上午 org.apache.coyote.abstractprotocol init
信息: initializing protocolhandler ["ajp-nio-8009"]
十一月 13, 2020 11:56:08 上午 org.apache.tomcat.util.net.nioselectorpool getsharedselector
信息: using a shared selector for servlet write/read
十一月 13, 2020 11:56:08 上午 org.apache.catalina.startup.catalina load
信息: initialization processed in 866 ms
十一月 13, 2020 11:56:08 上午 org.apache.catalina.core.standardservice startinternal
信息: starting service catalina
十一月 13, 2020 11:56:08 上午 org.apache.catalina.core.standardengine startinternal
信息: starting servlet engine: apache tomcat/8.0.5
十一月 13, 2020 11:56:12 上午 org.apache.catalina.core.applicationcontext log
信息: no spring webapplicationinitializer types detected on classpath
十一月 13, 2020 11:56:12 上午 org.apache.coyote.abstractprotocol start
信息: starting protocolhandler ["http-nio-8080"]
十一月 13, 2020 11:56:12 上午 org.apache.coyote.abstractprotocol start
信息: starting protocolhandler ["ajp-nio-8009"]
十一月 13, 2020 11:56:12 上午 org.apache.catalina.startup.catalina start
信息: server startup in 3826 ms
十一月 13, 2020 11:56:13 上午 org.apache.catalina.core.applicationcontext log
信息: initializing spring frameworkservlet 'springmvc'
十一月 13, 2020 11:56:13 上午 org.springframework.web.servlet.dispatcherservlet initservletbean
信息: frameworkservlet 'springmvc': initialization started
十一月 13, 2020 11:56:13 上午 org.springframework.web.context.support.xmlwebapplicationcontext preparerefresh
信息: refreshing webapplicationcontext for namespace 'springmvc-servlet': startup date [fri nov 13 11:56:13 cst 2020]; root of context hierarchy
十一月 13, 2020 11:56:13 上午 org.springframework.beans.factory.xml.xmlbeandefinitionreader loadbeandefinitions
信息: loading xml bean definitions from file [g:\language proctice\java\pro\20201109\.metadata\.plugins\org.eclipse.wst.server.core\tmp0\wtpwebapps\crmsystem\web-inf\classes\spring\spring-dao.xml]
十一月 13, 2020 11:56:13 上午 org.springframework.beans.factory.xml.xmlbeandefinitionreader loadbeandefinitions
信息: loading xml bean definitions from file [g:\language proctice\java\pro\20201109\.metadata\.plugins\org.eclipse.wst.server.core\tmp0\wtpwebapps\crmsystem\web-inf\classes\spring\spring-mvc.xml]
十一月 13, 2020 11:56:13 上午 org.springframework.beans.factory.xml.xmlbeandefinitionreader loadbeandefinitions
信息: loading xml bean definitions from file [g:\language proctice\java\pro\20201109\.metadata\.plugins\org.eclipse.wst.server.core\tmp0\wtpwebapps\crmsystem\web-inf\classes\spring\spring-service.xml]
十一月 13, 2020 11:56:14 上午 org.springframework.context.support.propertysourcesplaceholderconfigurer loadproperties
信息: loading properties file from class path resource [jdbc.properties]
十一月 13, 2020 11:56:14 上午 com.mchange.v2.log.mlog <clinit>
信息: mlog clients using java 1.4+ standard logging.
十一月 13, 2020 11:56:14 上午 com.mchange.v2.c3p0.c3p0registry banner
信息: initializing c3p0-0.9.1.2 [built 21-may-2007 15:04:56; debug? true; trace: 10]
11:56:14,733 |-info in ch.qos.logback.classic.loggercontext[default] - could not find resource [logback.groovy]
11:56:14,734 |-info in ch.qos.logback.classic.loggercontext[default] - could not find resource [logback-test.xml]
11:56:14,734 |-info in ch.qos.logback.classic.loggercontext[default] - found resource [logback.xml] at [file:/g:/language%20proctice/java/pro/20201109/.metadata/.plugins/org.eclipse.wst.server.core/tmp0/wtpwebapps/crmsystem/web-inf/classes/logback.xml]
11:56:14,868 |-info in ch.qos.logback.core.joran.action.appenderaction - about to instantiate appender of type [ch.qos.logback.core.consoleappender]
11:56:14,878 |-info in ch.qos.logback.core.joran.action.appenderaction - naming appender as [stdout]
11:56:14,911 |-info in ch.qos.logback.core.joran.action.nestedcomplexpropertyia - assuming default type [ch.qos.logback.classic.encoder.patternlayoutencoder] for [encoder] property
11:56:15,026 |-info in ch.qos.logback.classic.joran.action.rootloggeraction - setting level of root logger to debug
11:56:15,026 |-info in ch.qos.logback.core.joran.action.appenderrefaction - attaching appender named [stdout] to logger[root]
11:56:15,029 |-info in ch.qos.logback.classic.joran.action.configurationaction - end of configuration.
11:56:15,031 |-info in ch.qos.logback.classic.joran.joranconfigurator@5ad72777 - registering current configuration as safe fallback point
11:56:15.057 [http-nio-8080-exec-2] debug org.apache.ibatis.logging.logfactory - logging initialized using 'class org.apache.ibatis.logging.slf4j.slf4jimpl' adapter.
11:56:15.272 [http-nio-8080-exec-2] debug org.apache.ibatis.io.vfs - class not found: org.jboss.vfs.vfs
11:56:15.272 [http-nio-8080-exec-2] debug org.apache.ibatis.io.jboss6vfs - jboss 6 vfs api is not available in this environment.
11:56:15.275 [http-nio-8080-exec-2] debug org.apache.ibatis.io.vfs - class not found: org.jboss.vfs.virtualfile
11:56:15.277 [http-nio-8080-exec-2] debug org.apache.ibatis.io.vfs - vfs implementation org.apache.ibatis.io.jboss6vfs is not valid in this environment.
11:56:15.277 [http-nio-8080-exec-2] debug org.apache.ibatis.io.vfs - using vfs adapter org.apache.ibatis.io.defaultvfs
11:56:15.279 [http-nio-8080-exec-2] debug o.m.spring.sqlsessionfactorybean - scanned package: 'com.crm.entity' for aliases
11:56:15.367 [http-nio-8080-exec-2] debug o.m.spring.sqlsessionfactorybean - parsed configuration file: 'class path resource [mybatis-config.xml]'
11:56:15.369 [http-nio-8080-exec-2] debug o.m.spring.sqlsessionfactorybean - property 'mapperlocations' was not specified or no matching resources found
十一月 13, 2020 11:56:16 上午 org.springframework.web.servlet.mvc.method.annotation.requestmappinghandleradapter initcontrolleradvicecache
信息: looking for @controlleradvice: webapplicationcontext for namespace 'springmvc-servlet': startup date [fri nov 13 11:56:13 cst 2020]; root of context hierarchy
十一月 13, 2020 11:56:16 上午 org.springframework.web.servlet.mvc.method.annotation.requestmappinghandleradapter initcontrolleradvicecache
信息: looking for @controlleradvice: webapplicationcontext for namespace 'springmvc-servlet': startup date [fri nov 13 11:56:13 cst 2020]; root of context hierarchy
十一月 13, 2020 11:56:16 上午 org.springframework.web.servlet.handler.simpleurlhandlermapping registerhandler
信息: mapped url path [/resources/**] onto handler 'org.springframework.web.servlet.resource.resourcehttprequesthandler#0'
十一月 13, 2020 11:56:16 上午 org.springframework.web.servlet.handler.simpleurlhandlermapping registerhandler
信息: mapped url path [/**] onto handler 'org.springframework.web.servlet.resource.defaultservlethttprequesthandler#0'
十一月 13, 2020 11:56:16 上午 org.springframework.web.servlet.dispatcherservlet initservletbean
信息: frameworkservlet 'springmvc': initialization completed in 3240 ms

刚开始，我觉得是ssm环境问题，spirng-mvc没有正确配置，但是仔细观察日志，可以看到：

spring mvc 已经成功接管了我的静态资源

十一月 13, 2020 11:56:13 上午 org.springframework.web.servlet.dispatcherservlet initservletbean
信息: frameworkservlet 'springmvc': initialization started
十一月 13, 2020 11:56:16 上午 org.springframework.web.servlet.dispatcherservlet initservletbean

spring三个配置文件都已经加载进环境

十一月 13, 2020 11:56:13 上午 org.springframework.beans.factory.xml.xmlbeandefinitionreader loadbeandefinitions
信息: loading xml bean definitions from file [g:\language proctice\java\pro\20201109\.metadata\.plugins\org.eclipse.wst.server.core\tmp0\wtpwebapps\crmsystem\web-inf\classes\spring\spring-dao.xml]
十一月 13, 2020 11:56:13 上午 org.springframework.beans.factory.xml.xmlbeandefinitionreader loadbeandefinitions
信息: loading xml bean definitions from file [g:\language proctice\java\pro\20201109\.metadata\.plugins\org.eclipse.wst.server.core\tmp0\wtpwebapps\crmsystem\web-inf\classes\spring\spring-mvc.xml]
十一月 13, 2020 11:56:13 上午 org.springframework.beans.factory.xml.xmlbeandefinitionreader loadbeandefinitions
信息: loading xml bean definitions from file [g:\language proctice\java\pro\20201109\.metadata\.plugins\org.eclipse.wst.server.core\tmp0\wtpwebapps\crmsystem\web-inf\classes\spring\spring-service.xml]

资源目录和orm映射模型目录已经加载

十一月 13, 2020 11:56:16 上午 org.springframework.web.servlet.handler.simpleurlhandlermapping registerhandler
信息: mapped url path [/resources/**] onto handler 'org.springframework.web.servlet.resource.resourcehttprequesthandler#0'
十一月 13, 2020 11:56:16 上午 org.springframework.web.servlet.handler.simpleurlhandlermapping registerhandler
信息: mapped url path [/**] onto handler 'org.springframework.web.servlet.resource.defaultservlethttprequesthandler#0'

所以排除对ssm环境配置的怀疑，我再次查看tomcat。

在检验端口号未被占用等问题以后，我将tomcat8.0.5换成了tomcat8.5。
结果是成功访问到了前端页面，解决了这个问题。

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