404 - Http the requested is not available JavaEE Spring MVC - spring

Question

I am not very familiar with Spring MVC DriverManagerDataSource.I am trying to return a JSP from my controller. My Controller method is running well but when returning view, I'm getting a 404 error.
I don't know why I got this error If I'm telling this: in the web.xml
<servlet-mapping>
<servlet-name>spring</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
spring-servlet
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns = "http://www.springframework.org/schema/beans"
xmlns:xsi = "http://www.w3.org/2001/XMLSchema-instance"
xmlns:context = "http://www.springframework.org/schema/context"
xmlns:mvc = "http://www.springframework.org/schema/mvc"
xsi:schemaLocation =
"
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc.xsd
">
<context:component-scan base-package="controllers"></context:component-scan> <!-- com.javatpoint. -->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/jsp/"></property>
<property name="suffix" value=".jsp"></property>
</bean>
<bean class = "org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name = "driverClassName" value = "com.mysql.jdbc.Driver"></property>
<property name = "url" value = "jdbc:mysql://localhost:3306/empleados"></property>
<property name = "username" value = "---"></property>
<property name = "password" value = "---"></property>
</bean>
<bean id="jt" class="org.springframework.jdbc.core.JdbcTemplate">
<property name="dataSource" ref="ds"></property>
</bean>
<bean id = "dao" class = "dao.EmpDao">
<property name = "template" ref = "jt"></property>
</bean>
</beans>
web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" version="3.0">
<display-name>SpringMVC</display-name>
<context-param>
<param-name>contextClass</param-name>
<param-value>
org.springframework.web.context.support.AnnotationConfigWebApplicationContext
</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<servlet>
<servlet-name>spring</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>spring</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
</web-app>
HomeController.java
package EjemploCRUD.SpringMVC.controller;
import java.io.IOException;
import javax.servlet.http.HttpServletResponse;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;
#Controller
public class HomeController {
#RequestMapping(value="/")
public ModelAndView test(HttpServletResponse response) throws IOException{
return new ModelAndView("index");
}
}
MvcConfiguration.java
package EjemploCRUD.SpringMVC.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.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
import org.springframework.web.servlet.view.InternalResourceViewResolver;
#Configuration
#ComponentScan(basePackages="EjemploCRUD.SpringMVC")
#EnableWebMvc
public class MvcConfiguration extends WebMvcConfigurerAdapter{
#Bean
public ViewResolver getViewResolver(){
InternalResourceViewResolver resolver = new InternalResourceViewResolver();
resolver.setPrefix("/WEB-INF/views/");
resolver.setSuffix(".jsp");
return resolver;
}
#Override
public void addResourceHandlers(ResourceHandlerRegistry registry) {
registry.addResourceHandler("/resources/**").addResourceLocations("/resources/");
}
}
Error
Type Status Report
Message The requested resource [/SpringMVC/] is not available
Description The origin server did not find a current representation for the target resource or is not willing to disclose that one exists.
folder structure,

Answer 1

in your application you used both (java-based and xml-based) configuration types. in this answer, used the xml-based configuration.
try with following steps.
modify the spring-servlet.xml file as follows,
<context:component-scan base-package="controllers, EjemploCRUD.SpringMVC.controller"></context:component-scan>
<mvc:resources mapping="/resources/**" location="/resources/" />
config the location of spring-servlet.xml file in web.xml file as follows,
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/spring-servlet.xml</param-value>
</context-param>
in your application spring-servlet.xml and web.xml files are located under the WEB-INF/views directory.but these files not relevant to the view.hence, please move these two files into WEB-INF folder(best practice).
as per the web.xml file, configured the views (jsp files) path is WEB-INF/views directory. but in your folder structure index.jsp file is located under the WEB-INF folder. hence, get this error. please move index.jsp file into WEB-INF/views folder.