Spring Boot not serving static content - spring

Question

I can't get my Spring-boot project to serve static content.
I've placed a folder named static under src/main/resources. Inside it I have a folder named images. When I package the app and run it, it can't find the images I have put on that folder.
I've tried to put the static files in public, resources and META-INF/resources but nothing works.
If I jar -tvf app.jar I can see that the files are inside the jar on the right folder:
/static/images/head.png for example, but calling: http://localhost:8080/images/head.png, all I get is a 404
Any ideas why spring-boot is not finding this? (I'm using 1.1.4 BTW)

Answer 1

Not to raise the dead after more than a year, but all the previous answers miss some crucial points:
#EnableWebMvc on your class will disable org.springframework.boot.autoconfigure.web.WebMvcAutoConfiguration. That's fine if you want complete control but otherwise, it's a problem.
There's no need to write any code to add another location for static resources in addition to what is already provided. Looking at org.springframework.boot.autoconfigure.web.ResourceProperties from v1.3.0.RELEASE, I see a field staticLocations that can be configured in the application.properties. Here's a snippet from the source:
/**
* Locations of static resources. Defaults to classpath:[/META-INF/resources/,
* /resources/, /static/, /public/] plus context:/ (the root of the servlet context).
*/
private String[] staticLocations = RESOURCE_LOCATIONS;
As mentioned before, the request URL will be resolved relative to these locations. Thus src/main/resources/static/index.html will be served when the request URL is /index.html. The class that is responsible for resolving the path, as of Spring 4.1, is org.springframework.web.servlet.resource.PathResourceResolver.
Suffix pattern matching is enabled by default which means for a request URL /index.html, Spring is going to look for handlers corresponding to /index.html. This is an issue if the intention is to serve static content. To disable that, extend WebMvcConfigurerAdapter (but don't use #EnableWebMvc) and override configurePathMatch as shown below:
#Override
public void configurePathMatch(PathMatchConfigurer configurer) {
super.configurePathMatch(configurer);
configurer.setUseSuffixPatternMatch(false);
}
IMHO, the only way to have fewer bugs in your code is not to write code whenever possible. Use what is already provided, even if that takes some research, the return is worth it.
Edit July 2021:
WebMvcConfigurerAdapter has been deprecated since Spring 5. Implement WebMvcConfigurer and annotate with #Configuration.

Answer 2

Unlike what the spring-boot states, to get my spring-boot jar to serve the content:
I had to add specifically register my src/main/resources/static content through this config class:
#Configuration
public class StaticResourceConfiguration implements WebMvcConfigurer {
private static final String[] CLASSPATH_RESOURCE_LOCATIONS = {
"classpath:/META-INF/resources/", "classpath:/resources/",
"classpath:/static/", "classpath:/public/" };
#Override
public void addResourceHandlers(ResourceHandlerRegistry registry) {
registry.addResourceHandler("/**")
.addResourceLocations(CLASSPATH_RESOURCE_LOCATIONS);
}
}

Answer 3

I had a similar problem, and it turned out that the simple solution was to have my configuration class extend WebMvcAutoConfiguration:
#Configuration
#EnableWebMvc
#ComponentScan
public class ServerConfiguration extends WebMvcAutoConfiguration{
}
I didn't need any other code to allow my static content to be served, however, I did put a directory called public under src/main/webapp and configured maven to point to src/main/webapp as a resource directory. This means that public is copied into target/classes, and is therefore on the classpath at runtime for spring-boot/tomcat to find.

Answer 4

Look for Controllers mapped to "/" or with no path mapped.
I had a problem like this, getting 405 errors, and banged my head hard for days. The problem turned out to be a #RestController annotated controller that I had forgot to annotate with a #RequestMapping annotation. I guess this mapped path defaulted to "/" and blocked the static content resource mapping.

Answer 5

The configuration could be made as follows:
#Configuration
#EnableWebMvc
public class WebMvcConfig extends WebMvcAutoConfigurationAdapter {
// specific project configuration
}
Important here is that your WebMvcConfig may override addResourceHandlers method and therefore you need to explicitly invoke super.addResourceHandlers(registry) (it is true that if you are satisfied with the default resource locations you don't need to override any method).
Another thing that needs to be commented here is that those default resource locations (/static, /public, /resources and /META-INF/resources) will be registered only if there isn't already a resource handler mapped to /**.
From this moment on, if you have an image on src/main/resources/static/images named image.jpg for instance, you can access it using the following URL: http://localhost:8080/images/image.jpg (being the server started on port 8080 and application deployed to root context).

Answer 6

I was having this exact problem, then realized that I had defined in my application.properties:
spring.resources.static-locations=file:/var/www/static
Which was overriding everything else I had tried. In my case, I wanted to keep both, so I just kept the property and added:
spring.resources.static-locations=file:/var/www/static,classpath:static
Which served files from src/main/resources/static as localhost:{port}/file.html.
None of the above worked for me because nobody mentioned this little property that could have easily been copied from online to serve a different purpose ;)
Hope it helps! Figured it would fit well in this long post of answers for people with this problem.

Answer 7

Did you check the Spring Boot reference docs?
By default Spring Boot will serve static content from a folder called /static (or /public or /resources or /META-INF/resources) in the classpath or from the root of the ServletContext.
You can also compare your project with the guide Serving Web Content with Spring MVC, or check out the source code of the spring-boot-sample-web-ui project.

Answer 8

I think the previous answers address the topic very well. However, I'd add that in one case when you have Spring Security enabled in your application, you might have to specifically tell Spring to permit requests to other static resource directories like for example "/static/fonts".
In my case I had "/static/css", "/static/js", "/static/images" permited by default , but /static/fonts/** was blocked by my Spring Security implementation.
Below is an example of how I fixed this.
#Configuration
#EnableWebSecurity
public class WebSecurityConfig extends WebSecurityConfigurerAdapter {
.....
#Override
protected void configure(final HttpSecurity http) throws Exception {
http.authorizeRequests().antMatchers("/", "/fonts/**").permitAll().
//other security configuration rules
}
.....
}

Answer 9

This solution works for me:
First, put a resources folder under webapp/WEB-INF, as follow structure
-- src
-- main
-- webapp
-- WEB-INF
-- resources
-- css
-- image
-- js
-- ...
Second, in spring config file
#Configuration
#EnableWebMvc
public class MvcConfig extends WebMvcConfigurerAdapter{
#Bean
public ViewResolver getViewResolver() {
InternalResourceViewResolver resolver = new InternalResourceViewResolver();
resolver.setPrefix("/WEB-INF/views/");
resolver.setSuffix(".html");
return resolver;
}
#Override
public void configureDefaultServletHandling(
DefaultServletHandlerConfigurer configurer) {
configurer.enable();
}
#Override
public void addResourceHandlers(ResourceHandlerRegistry registry) {
registry.addResourceHandler("/resource/**").addResourceLocations("WEB-INF/resources/");
}
}
Then, you can access your resource content, such as
http://localhost:8080/resource/image/yourimage.jpg

Answer 10

Just to add yet another answer to an old question... People have mentioned the #EnableWebMvc will prevent WebMvcAutoConfiguration from loading, which is the code responsible for creating the static resource handlers. There are other conditions that will prevent WebMvcAutoConfiguration from loading as well. Clearest way to see this is to look at the source:
https://github.com/spring-projects/spring-boot/blob/master/spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/web/servlet/WebMvcAutoConfiguration.java#L139-L141
In my case, I was including a library that had a class that was extending from WebMvcConfigurationSupport which is a condition that will prevent the autoconfiguration:
#ConditionalOnMissingBean(WebMvcConfigurationSupport.class)
It's important to never extend from WebMvcConfigurationSupport. Instead, extend from WebMvcConfigurerAdapter.
UPDATE: The proper way to do this in 5.x is to implement WebMvcConfigurer

Answer 11

Put static resources under the directory:
/src/main/resources/static
add this property in application.properties file
server.servlet.context-path=/pdx
You can access from http://localhost:8080/pdx/images/image.jpg

Answer 12

There are 2 things to consider (Spring Boot v1.5.2.RELEASE)-
1) Check all Controller classes for #EnableWebMvc annotation, remove it if there is any
2) Check the Controller classes for which annotation is used - #RestController or #Controller. Do not mix Rest API and MVC behaviour in one class. For MVC use #Controller and for REST API use #RestController
Doing above 2 things resolved my issue. Now my spring boot is loading static resources with out any issues.
#Controller => load index.html => loads static files.
#Controller
public class WelcomeController {
// inject via application.properties
#Value("${welcome.message:Hello}")
private String message = "Hello World";
#RequestMapping("/")
public String home(Map<String, Object> model) {
model.put("message", this.message);
return "index";
}
}
index.html
<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org">
<head>
<title>index</title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<link rel="stylesheet/less" th:href="#{/webapp/assets/theme.siberia.less}"/>
<!-- The app's logic -->
<script type="text/javascript" data-main="/webapp/app" th:src="#{/webapp/libs/require.js}"></script>
<script type="text/javascript">
require.config({
paths: { text:"/webapp/libs/text" }
});
</script>
<!-- Development only -->
<script type="text/javascript" th:src="#{/webapp/libs/less.min.js}"></script>
</head>
<body>
</body>
</html>

Answer 13

I'm using Spring Boot 2.2 and not getting any of my static content. I discovered two solutions that worked for me:
Option #1 - Stop using #EnableWebMvc annotation
This annotation disables some automatic configuration, including the part that automatically serves static content from commonly-used locations like /src/main/resources/static. If you don't really need #EnableWebMvc, then just remove it from your #Configuration class.
Option #2 - Implement WebMvcConfigurer in your #EnableWebMvc annotated class and implementaddResourceHandlers()
Do something like this:
#EnableWebMvc
#Configuration
public class SpringMVCConfiguration implements WebMvcConfigurer {
#Override
public void addResourceHandlers(ResourceHandlerRegistry registry) {
registry.addResourceHandler("/js/**").addResourceLocations("classpath:/static/js/");
registry.addResourceHandler("/css/**").addResourceLocations("classpath:/static/css/");
registry.addResourceHandler("/vendor/**").addResourceLocations("classpath:/static/vendor/");
registry.addResourceHandler("/**").addResourceLocations("classpath:/static/");
}
}
Just remember that your code is now in charge of managing all static resource paths.

Answer 14

In case the issue surfaces when launching the application from within an IDE (i.e. starting from Eclipse or IntelliJ Idea), and using Maven, the key to the solution is in the Spring-boot Getting Started documentation:
If you are using Maven, execute:
mvn package && java -jar target/gs-spring-boot-0.1.0.jar
The important part of which is adding the package goal to be run before the application is actually started. (Idea: Run menu, Edit Configrations..., Add, and there select Run Maven Goal, and specify the package goal in the field)

Answer 15

I was facing the same issue in spring boot 2.1.3 saying that resource not found 404. I removed below from applicatiion.properties.
#spring.resources.add-mappings=true
#spring.resources.static-locations=classpath:static
#spring.mvc.static-path-pattern=/**,
Removed #enableWebMVC and removed any WebMvcConfigurer overriding
//#EnableWebMvc
Also make sure you have #EnableAutoConfiguration in your config.
And put all static resources into src/main/resources/static and it just worked like magic finally..

Answer 16

I am using 1.3.5 and host a bunch of REST-services via Jersey implementation. That worked fine until I decided to add a couple of HTMLs + js files.
None of answers given on this forum helped me. However, when I added following dependency in my pom.xml all the content in src/main/resources/static was finally showing via browser:
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
<dependency>
It seems spring-web / spring-webmvc is the important transitive dependency that makes spring boot auto config turn on.

Answer 17

FYI: I also noticed I can mess up a perfectly working spring boot app and prevent it from serving contents from the static folder, if I add a bad rest controller like so
#RestController
public class BadController {
#RequestMapping(method= RequestMethod.POST)
public String someMethod(#RequestParam(value="date", required=false)String dateString, Model model){
return "foo";
}
}
In this example, after adding the bad controller to the project, when the browser asks for a file available in static folder, the error response is '405 Method Not Allowed'.
Notice paths are not mapped in the bad controller example.

Answer 18

using spring boot 2.*, i have a controller that maps to routes GetMapping({"/{var}", "/{var1}/{var2}", "/{var1}/{var2}/{var3}"}) and boom my app stop serving resources.
i know it is not advisable to have such routes but it all depends on the app you are building (in my case, i have no choice but to have such routes)
so here is my hack to make sure my app serve resources again. I simply have a controller that maps to my resources. since spring will match a direct route first before any that has variable, i decided to add a controller method that maps to /imgaes/{name} and repeated same for other resources
#GetMapping(value = "/images/{image}", produces = {MediaType.IMAGE_GIF_VALUE, MediaType.IMAGE_JPEG_VALUE, MediaType.IMAGE_PNG_VALUE})
public #ResponseBody
byte[] getImage(#PathVariable String image) {
ClassPathResource file = new ClassPathResource("static/images/" + image);
byte[] bytes;
try {
bytes = StreamUtils.copyToByteArray(file.getInputStream());
} catch (IOException e) {
throw new ResourceNotFoundException("file not found: " + image);
}
return bytes;
}
and this solved my issue

Answer 19

Requests to /** are evaluated to static locations configured in
resourceProperties.
adding the following on application.properties, might be the only thing you need to do...
spring.resources.static-locations=classpath:/myresources/
this will overwrite default static locations, wich is:
ResourceProperties.CLASSPATH_RESOURCE_LOCATIONS = { "classpath:/META-INF/resources/",
"classpath:/resources/", "classpath:/static/", "classpath:/public/" };
You might not want to do that and just make sure your resources end up in one of those default folders.
Performing a request:
If I would have example.html stored on /public/example.html
Then I can acces it like this:
<host>/<context-path?if you have one>/example.html
If I would want another uri like <host>/<context-path>/magico/* for files in classpath:/magicofiles/* you need a bit more config
#Configuration
class MyConfigClass implements WebMvcConfigurer
#Override
public void addResourceHandlers(ResourceHandlerRegistry registry) {
registry.addResourceHandler("/magico/**").addResourceLocations("/magicofiles/");
}

Answer 20

In my case I have a spring boot application which is kind of mixing spring and jaxrs. So I have a java class which inherits from the class org.glassfish.jersey.server.ResourceConfig. I had to add this line to the constructor of that class so that the spring endpoints are still called: property(ServletProperties.FILTER_FORWARD_ON_404, true).

Answer 21

Had the same problem, using gradle and eclipse and spent hours trying to figure it out.
No coding required, the trick is that you must use the menu option New->Source Folder (NOT New -> Folder) to create the static folder under src/main/resources. Don't know why this works, but did new -> source folder then i named the folder static (then source folder dialog gives an error for which you must check: Update exclusion filters in other source folders to solve nesting). The my new static folder I added index.html and now it works.

Answer 22

Well sometimes is worth to check did you override the global mappings by some rest controller. Simple example mistake (kotlin):
#RestController("/foo")
class TrainingController {
#PostMapping
fun bazz(#RequestBody newBody: CommandDto): CommandDto = return commandDto
}
In the above case you will get when you request for static resources:
{
title: "Method Not Allowed",
status: 405,
detail: "Request method 'GET' not supported",
path: "/index.html"
}
The reason for it could be that you wanted to map #PostMapping to /foo but forget about #RequestMapping annotation on the #RestController level. In this case all request are mapped to POST and you won't receive static content in this case.

Answer 23

Given resources under src/main/resources/static,
if you add this code, then all static content from src/main/resources/static will be available under "/":
#Configuration
public class StaticResourcesConfigurer implements WebMvcConfigurer {
public void addResourceHandlers(final ResourceHandlerRegistry registry) {
registry.addResourceHandler("/resources/**").addResourceLocations("classpath:/resources/static/");
}
}

Answer 24

In my case, some static files were not served, like .woff fonts and some images. But css and js worked just fine.
Update: A much better solution to make Spring Boot serve the woff fonts correctly is to configure the resource filtering mentioned in this answer, for example (note that you need both includes and excludes):
<resources>
<resource>
<directory>src/main/resources</directory>
<filtering>true</filtering>
<excludes>
<exclude>static/aui/fonts/**</exclude>
</excludes>
</resource>
<resource>
<directory>src/main/resources</directory>
<filtering>false</filtering>
<includes>
<include>static/aui/fonts/**</include>
</includes>
</resource>
</resources>
----- Old solution (working but will corrupt some fonts) -----
Another solution was to disable suffix pattern matching with setUseSuffixPatternMatch(false)
#Configuration
public class StaticResourceConfig implements WebMvcConfigurer {
#Override
public void configurePathMatch(PathMatchConfigurer configurer) {
// disable suffix matching to serve .woff, images, etc.
configurer.setUseSuffixPatternMatch(false);
}
}
Credits: #Abhiji did point me with 4. in the right direction!

Answer 25

Works for Thymeleaf, you can link the stylesheet using
<link th:href="#{/css/style.css}" rel="stylesheet" />

Answer 26

As said above, the file should be in $ClassPath/static/images/name.png, (/static or /public or /resources or /META-INF/resources). This $ClassPath means main/resources or main/java dir.
If your files are not in standard dirs, you can add the following configuration:
#Configuration
#EnableWebSecurity
public class SecurityConfig extends WebSecurityConfigurerAdapter {
#Override
public void configure(WebSecurity web) throws Exception {
web.ignoring().antMatchers("/lib/**"); // like this
}
#Autowired
public void configureGlobal(AuthenticationManagerBuilder auth) throws Exception {
// ... etc.
}
...
}