Spring MVC JSP is not rendering - spring

Question

I am currently learning Spring MVC. I am trying to call a controller which will return the JSP. But when I am hitting the request it is printing the JSP code in browser and not rendering it.
File pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<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>org.example</groupId>
<artifactId>SpringWeb</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>war</packaging>
<name>SpringWeb Maven Webapp</name>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<maven.compiler.source>1.7</maven.compiler.source>
<maven.compiler.target>1.7</maven.compiler.target>
</properties>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.11</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>5.3.16</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.11</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>io.rest-assured</groupId>
<artifactId>spring-mock-mvc</artifactId>
<version>3.0.0</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.hamcrest</groupId>
<artifactId>hamcrest-all</artifactId>
<version>1.3</version>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-lang3</artifactId>
<version>3.12.0</version>
</dependency>
<dependency>
<groupId>org.mockito</groupId>
<artifactId>mockito-core</artifactId>
<version>4.7.0</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>3.1.0</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.junit.jupiter</groupId>
<artifactId>junit-jupiter</artifactId>
<version>RELEASE</version>
<scope>compile</scope>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>5.3.19</version>
<scope>compile</scope>
</dependency>
</dependencies>
<build>
<finalName>SpringWeb</finalName>
<pluginManagement>
<plugins>
<plugin>
<artifactId>maven-clean-plugin</artifactId>
<version>3.1.0</version>
</plugin>
<plugin>
<artifactId>maven-resources-plugin</artifactId>
<version>3.0.2</version>
</plugin>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.8.0</version>
</plugin>
<plugin>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.22.1</version>
</plugin>
<plugin>
<artifactId>maven-war-plugin</artifactId>
<version>3.2.2</version>
</plugin>
<plugin>
<artifactId>maven-install-plugin</artifactId>
<version>2.5.2</version>
</plugin>
<plugin>
<artifactId>maven-deploy-plugin</artifactId>
<version>2.8.2</version>
</plugin>
<plugin>
<groupId>org.apache.tomcat.maven</groupId>
<artifactId>tomcat7-maven-plugin</artifactId>
<version>2.2</version>
<configuration>
<path>SpringWeb</path>
</configuration>
</plugin>
</plugins>
</pluginManagement>
</build>
</project>
File HomeController.java
package controller;
import configuration.HomeConfig;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import repository.SpitterRepository;
#Controller
#RequestMapping({"/spitter","/home"})
public class HomeController {
private SpitterRepository spitterRepository;
public HomeController()
{
}
#Autowired
public HomeController(SpitterRepository spitterRepository)
{
this.spitterRepository = spitterRepository;
System.out.println("HomeController Constructor");
}
#RequestMapping("/")
public String home()
{
System.out.println("Calling home html");
return "home";
}
#RequestMapping("/spittles")
public String spittles(Model model)
{
model.addAttribute(spitterRepository.findSpittles(Long.MAX_VALUE,20));
return "spittles";
}
}
HomeConfig.java
package configuration;
import controller.HomeController;
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.DefaultServletHandlerConfigurer;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
import org.springframework.web.servlet.view.InternalResourceViewResolver;
import org.springframework.web.servlet.view.JstlView;
#Configuration
#EnableWebMvc
#ComponentScan(basePackages = {"controller","repository"})
public class HomeConfig implements WebMvcConfigurer {
#Bean
public ViewResolver createViewResolver()
{
System.out.println("This is View Resolver");
InternalResourceViewResolver internalResourceViewResolver = new InternalResourceViewResolver();
internalResourceViewResolver.setPrefix("/WEB-INF/");
internalResourceViewResolver.setSuffix(".jsp");
//internalResourceViewResolver.setExposeContextBeansAsAttributes(true);
internalResourceViewResolver.setViewClass(JstlView.class);
return internalResourceViewResolver;
}
/*#Bean
public HomeController createHomeController()
{
return new HomeController();
}*/
#Override
public void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer) {
configurer.enable();
}
}
HomeAppInitializer.java
package configuration;
import org.springframework.web.servlet.support.AbstractAnnotationConfigDispatcherServletInitializer;
public class HomeAppInitalizer extends AbstractAnnotationConfigDispatcherServletInitializer {
#Override
protected Class<?>[] getRootConfigClasses() {
return null;
}
#Override
protected Class<?>[] getServletConfigClasses() {
System.out.println("This is Servlet Config Classes");
return new Class[]{HomeConfig.class};
}
#Override
protected String[] getServletMappings() {
return new String[]{"/*"};
}
}
spitters.jsp
<%# page language="java" contentType="text/html; charset=US-ASCII"
pageEncoding="US-ASCII"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "https://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
<title>First JSP</title>
</head>
<%# page import="java.util.Date" %>
<body>
<h3>SPITTLES</h3><br>
<strong>Current Time is</strong>: <%=new Date() %>
</body>
</html>
So when I run the project using the command tomcat7:run and calling the following url http://localhost:8080/SpringWeb/home/spittles, the enitre JSP code is printing in browser and rendering does not happen, I am stuck in this for 2 days. Kindly help me in resolving the issue. I am using Intellij IDE.

Answer 1

You code wrong syntax at
#Autowired
public HomeController(SpitterRepository spitterRepository)
{
this.spitterRepository = spitterRepository;
System.out.println("HomeController Constructor");
}
You have wrong web configuration. Fix like this
package com.example;
#Configuration
public class WebConfig implements WebMvcConfigurer {
#Bean
public ViewResolver viewResolver() {
final InternalResourceViewResolver bean = new InternalResourceViewResolver();
bean.setViewClass(JstlView.class);
bean.setPrefix("/WEB-INF/view/");
bean.setSuffix(".jsp");
bean.setOrder(2);
return bean;
}
/** Static resource locations including themes*/
#Override
public void addResourceHandlers(ResourceHandlerRegistry registry) {
registry.addResourceHandler("/resources/**")
.addResourceLocations("/", "/resources/")
.setCachePeriod(3600)
.resourceChain(true)
.addResolver(new PathResourceResolver());
}
// Other configuration not display at here.
}
You maybe put JSP files in wrong folder.
You tried http://localhost:8080/SpringWeb/home/spittles
I assumpt you use folder /WEB-INF/view , then file spittles.jsp should has path /WEB-INF/view/home/spittles.jsp
See sample at
https://github.com/eugenp/tutorials/blob/master/spring-web-modules/spring-mvc-basics/src/main/java/com/baeldung/spring/web/config/WebConfig.java#L44-L51
https://www.baeldung.com/spring-mvc-view-resolver-tutorial