如何使用JSP使用Spring MVC显示图像

Question

I'm having a hard time getting an image to display using Spring MVC with JSP. I know there are other very similar SO questions, but none of the answers on those questions seemed to work.

I have a very simple project with only two java files and a single JSP file to display. This is my WebMvcConfigurerAdapter class:

@Configuration
@ComponentScan(basePackages="com.rigatron.rigs4j")
@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/");
}

This is my home page's controller class:

@Controller
public class HomeController {

@RequestMapping(value="/")
public ModelAndView test(HttpServletResponse response) throws IOException {
    return new ModelAndView("home");
}

Here is the line in the JSP file where I am trying to display my image:

<img src="/resources/old.jpeg" alt="Photo of Youthful William" id="pic" />

I have old.jpeg in my /resources/ folder. The rest of the page is displayed fine, but only the alt text is displayed here.

I am deploying this app using Tomcat8, and I have this line is my Maven pom file which copies the produced WAR file into Tomcat's webapps directory every time I build it:

<plugin>
  <groupId>org.apache.maven.plugins</groupId>
  <artifactId>maven-war-plugin</artifactId>
  <configuration>
    <outputDirectory>C:\my\local\dir\tomcat8\webapps</outputDirectory>
  </configuration>
</plugin>

So when I navigate using my browser to localhost:8080/myprojectname the rest of the JSP file is displayed correctly, but the photo is not, only the alt text. Any help with this issue would be appreciate.

Answer 1

Ok, I figured out where I was going wrong. This SO post pointed me in the right direction:

Can't display images in JSP

So basically, I was trying to load resources from the root of the web server instead of the root of my webapp. So, in order to reference the root of the webapp I included these two lines:

<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>

...

<img src="<c:url value='/resources/old.jpeg'/>" alt="Photo of Youthful William" id="pic" />

In order to use this JSTL tag I had to include this Maven dependency:

<dependency>
    <groupId>jstl</groupId>
    <artifactId>jstl</artifactId>
    <version>1.2</version>
</dependency>

I apologize for perhaps posting this question prematurely, but I'm going to leave it up in hopes that it can help someone else.