How to run the imported Spring mvc project in Intellij?

Question

I am using IntelliJ and imported the Spring MVC project.I configured the maven setup and used mvn clean install to build my project.And for running I configured tomcat:run on the configuration of IntelliJ. But red markers are shown as:

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.luv2code</groupId>
    <artifactId>spring-security-demo</artifactId>
    <version>1.0</version>
    <packaging>war</packaging>

    <name>spring-security-demo</name>

    <properties>
        <springframework.version>5.0.2.RELEASE</springframework.version>

        <maven.compiler.source>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>
    </properties>

    <dependencies>

        <!-- Spring MVC support -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>${springframework.version}</version>
        </dependency>

        <!-- Servlet, JSP and JSTL support -->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>3.1.0</version>
        </dependency>

        <dependency>
            <groupId>javax.servlet.jsp</groupId>
            <artifactId>javax.servlet.jsp-api</artifactId>
            <version>2.3.1</version>
        </dependency>

        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>jstl</artifactId>
            <version>1.2</version>
        </dependency>

        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>3.8.1</version>
            <scope>test</scope>
        </dependency>

    </dependencies>

    <!-- TO DO: Add support for Maven WAR Plugin -->
    <build>
        <finalName>spring-security-demo</finalName>
        <pluginManagement>
             <plugins>
                 <plugin>
                     <!-- Add maven coordinate for maven war plugin-->
                     <!-- https://mvnrepository.com/artifact/org.apache.maven.plugins/maven-war-plugin -->

                         <groupId>org.apache.maven.plugins</groupId>
                         <artifactId>maven-war-plugin</artifactId>
                         <version>3.2.3</version>


                 </plugin>
             </plugins>
        </pluginManagement>
    </build>

</project>

But it is successfully compiling and while running consoles printed are:

"C:\\Program Files\\Java\\jdk1.8.0_111\\bin\\java.exe" -Dmaven.multiModuleProjectDirectory=C:\\Users\\AshwinPC\\Desktop\\Spring-Security\\spring-security-demo-starter\\spring-security-demo-01-base-app "-Dmaven.home=C:\\Program Files\\JetBrains\\IntelliJ IDEA Community Edition 2019.2\\plugins\\maven\\lib\\maven3" "-Dclassworlds.conf=C:\\Program Files\\JetBrains\\IntelliJ IDEA Community Edition 2019.2\\plugins\\maven\\lib\\maven3\\bin\\m2.conf" "-Dmaven.ext.class.path=C:\\Program Files\\JetBrains\\IntelliJ IDEA Community Edition 2019.2\\plugins\\maven\\lib\\maven-event-listener.jar" "-javaagent:C:\\Program Files\\JetBrains\\IntelliJ IDEA Community Edition 2019.2\\lib\\idea_rt.jar=61598:C:\\Program Files\\JetBrains\\IntelliJ IDEA Community Edition 2019.2\\bin" -Dfile.encoding=UTF-8 -classpath "C:\\Program Files\\JetBrains\\IntelliJ IDEA Community Edition 2019.2\\plugins\\maven\\lib\\maven3\\boot\\plexus-classworlds-2.6.0.jar" org.codehaus.classworlds.Launcher -Didea.version2019.2 tomcat:run [INFO] Scanning for projects... [INFO] [INFO] --- --------------< com.luv2code:spring-security-demo >------------------ [INFO] Building spring-security-demo 1.0 [INFO] --------------------------------[ war ]--------------------------------- [INFO] [INFO] >>> tomcat-maven-plugin:1.1:run (default-cli) > compile @ spring-security-demo >>> [INFO] [INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ spring-security-demo --- [WARNING] Using platform encoding (UTF-8 actually) to copy filtered resources, ie build is platform dependent! [INFO] skip non existing resourceDirectory C:\\Users\\AshwinPC\\Desktop\\Spring-Security\\spring-security-demo-starter\\spring-security-demo-01-base-app\\src\\main\\resources [INFO] [INFO] --- maven-compiler-plugin:3.1:compile (default-compile) @ spring-security-demo --- [INFO] Nothing to compile - all classes are up to date [INFO] [INFO] <<< tomcat-maven-plugin:1.1:run (default-cli) < compile @ spring-security-demo <<< [INFO] [INFO] [INFO] --- tomcat-maven-plugin:1.1:run (default-cli) @ spring-security-demo --- [INFO] Running war on http://localhost:8080/spring-security-demo [INFO] Creating Tomcat server configuration at C:\\Users\\AshwinPC\\Desktop\\Spring-Security\\spring-security-demo-starter\\spring-security-demo-01-base-app\\target\\tomcat Aug 09, 2019 10:49:23 AM org.apache.catalina.startup.Embedded start INFO: Starting tomcat server Aug 09, 2019 10:49:23 AM org.apache.catalina.core.StandardEngine start INFO: Starting Servlet Engine: Apache Tomcat/6.0.29 Aug 09, 2019 10:49:24 AM org.apache.coyot e.http11.Http11Protocol init INFO: Initializing Coyote HTTP/1.1 on http-8080 Aug 09, 2019 10:49:24 AM org.apache.coyote.http11.Http11Protocol start INFO: Starting Coyote HTTP/1.1 on http-8080

And when I hit : http://localhost:8080/spring-security-demo/

Other configuration classes are:

DemoController.java

  package com.luv2code.springsecurity.demo.controller;


    import org.springframework.stereotype.Controller;
    import org.springframework.web.bind.annotation.GetMapping;

    @Controller
    public class DemoController {

        @GetMapping("/")
        public String showHome(){
            return "home";
        }


    }

Config class:

package com.luv2code.springsecurity.demo.config;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.ViewResolver;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.view.InternalResourceViewResolver;

@Configuration
@EnableWebMvc
@ComponentScan(basePackages = "com.luv2code")
public class DemoAppConfig {

    //bean for viewresolver
    @Bean
    public ViewResolver viewResolver(){
        InternalResourceViewResolver viewResolver=new InternalResourceViewResolver();
        viewResolver.setPrefix("/WEB-INF/view/");
        viewResolver.setSuffix(".jsp");
        return viewResolver;
    }




}

Dispatcher Servlet config

package com.luv2code.springsecurity.demo.config;


import org.springframework.web.servlet.support.AbstractAnnotationConfigDispatcherServletInitializer;

public class MySpringMVcDispatcherServletInitilizer extends AbstractAnnotationConfigDispatcherServletInitializer {


    @Override
    protected Class<?>[] getRootConfigClasses(){
         return null;
    }

    @Override
    protected Class<?>[] getServletConfigClasses(){
          return  new Class[] {DemoAppConfig.class};
    }

    @Override
    protected  String[] getServletMappings(){
        return new String[] { "/" };
    }


}

Answer 1

Try to do something like this:
File->Project Structure->Modules-> Check whether Web module been added
If 'no':
1. Add this module. Then see point 2.
If 'yes':
Check Web Resource Directories there:
2. It must point to your path to webapp directory.

Answer 2

In your DemoController showHome should return a ModelAndView something like this then ViewResolver will map it to home.jsp

@RequestMapping("/")
public ModelAndView showHome() {
    return new ModelAndView("home");
}

You can also refer here for more detail