[Ultimate solution] Could not open ServletContext resource [/WEB-INF/dispatcher-servlet.xml]

【❤️The ultimate solution❤️】Could not open ServletContext resource [/WEB-INF/dispatcher-servlet.xml]

java.io.FileNotFoundException: Could not open ServletContext resource [/WEB-INF/dispatcher-servlet.xml]
	org.springframework.web.context.support.ServletContextResource.getInputStream(ServletContextResource.java:159)
	org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:333)
	org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:310)
	org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:188)
	org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:224)
	org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:195)
	org.springframework.web.context.support.XmlWebApplicationContext.loadBeanDefinitions(XmlWebApplicationContext.java:125)
	org.springframework.web.context.support.XmlWebApplicationContext.loadBeanDefinitions(XmlWebApplicationContext.java:94)
	org.springframework.context.support.AbstractRefreshableApplicationContext.refreshBeanFactory(AbstractRefreshableApplicationContext.java:130)
	org.springframework.context.support.AbstractApplicationContext.obtainFreshBeanFactory(AbstractApplicationContext.java:671)
	org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:553)
	org.springframework.web.servlet.FrameworkServlet.configureAndRefreshWebApplicationContext(FrameworkServlet.java:702)
	org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:668)
	org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:716)
	org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:591)
	org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:530)
	org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:170)
	javax.servlet.GenericServlet.init(GenericServlet.java:158)
	org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:541)
	org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
	org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:687)
	org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:360)
	org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:399)
	org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65)
	org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:890)
	org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1743)
	org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
	org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191)
	org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659)
	org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
	java.lang.Thread.run(Thread.java:748)

1. Causes:

As mentioned above, after starting Tomcat, the configuration file dispatcher-servlet.xml cannot be found during project initialization .

1.1. Configuration file naming problem

• The servlet name configured in the web.xml file is different from the name of the springmvc configuration file. Just modify it to be the same.

What should be noted here is that the name defaults to the value of servlet-name -servlet.xml, so we need to delete the "-servlet" part after dispatcher-servlet in the first picture, because this part is there by default.

• The configuration file of springmvc is:dispatcher-servlet.xml

• The servlet-name configuration is:

    <servlet>
        <servlet-name>dispatcher</servlet-name>//这里不能写成dispatcher-servlet，因为 -servlet是默认就有的！！！
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>dispatcher</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>

1.2. Spring container startup problem

• There is a problem with Spring container startup. The spring configuration file for startup is not configured.

<context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:applicationContext.xml</param-value>
    </context-param>

The mapping configuration of this file is required, and the naming cannot be customized. The required<param-name>contextConfigLocation</param-name>

2. Reference articles

• "About "Could not open ServletContext resource [/WEB-INF/applicationContext.xml]" solution"
• "Resolving Could not open ServletContext resource [/WEB-INF/core-servlet.xml] exception"
• "Error reporting for beginners with springMVC – Servlet.init() for servlet DispatcherServlet threw exception"