Spring Boot unable to serve static image from resource folder - spring

Question

In my Spring Boot application I have a following static file:
\src\main\resources\static\images\social\facebook\f_logo.jpg
This is my application.properties
server.port: 8080
server.contextPath: /api
I'm trying to access this file by the following url:
http://localhost:8080/api/images/social/facebook/f_logo.jpg
but the server returns 404 Not Found.
What am I doing wrong and how to fix it ?
UPDATED
My pom files:
<?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>com.example</groupId>
<artifactId>example</artifactId>
<version>0.0.1</version>
<packaging>pom</packaging>
<name>example</name>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<jackson.version>2.8.0</jackson.version>
<spring.version>4.3.5.RELEASE</spring.version>
<spring.boot.version>1.4.3.RELEASE</spring.boot.version>
<cdi-api.version>2.0-EDR1</cdi-api.version>
<slf4j.version>1.7.18</slf4j.version>
<logback.version>1.1.6</logback.version>
<junit.version>4.12</junit.version>
<log4j.version>1.2.17</log4j.version>
<commons-lang3.version>3.4</commons-lang3.version>
<commons-validator.version>1.5.0</commons-validator.version>
<commons-io.version>2.4</commons-io.version>
<jacoco-maven-plugin.version>0.7.4.201502262128</jacoco-maven-plugin.version>
<maven-surefire-plugin.version>2.19</maven-surefire-plugin.version>
<lifecycle-mapping.version>1.0.0</lifecycle-mapping.version>
<java.source.version>1.8</java.source.version>
<java.target.version>1.8</java.target.version>
</properties>
<repositories>
<repository>
<id>spring-milestones</id>
<name>Spring Milestones</name>
<url>http://repo.spring.io/milestone</url>
<snapshots>
<enabled>false</enabled>
</snapshots>
</repository>
<repository>
<id>neo4j-release-repository</id>
<name>Neo4j Maven 2 release repository</name>
<url>http://m2.neo4j.org/content/repositories/releases</url>
<releases>
<enabled>true</enabled>
</releases>
<snapshots>
<enabled>false</enabled>
</snapshots>
</repository>
<repository>
<id>spring-libs-milestone</id>
<name>Spring Milestones</name>
<url>https://repo.spring.io/libs-milestone</url>
<snapshots>
<enabled>false</enabled>
</snapshots>
</repository>
</repositories>
<build>
<plugins>
<plugin>
<groupId>org.jacoco</groupId>
<artifactId>jacoco-maven-plugin</artifactId>
<version>${jacoco-maven-plugin.version}</version>
<configuration>
<excludes>
</excludes>
</configuration>
<executions>
<execution>
<id>jacoco-initialize</id>
<phase>initialize</phase>
<goals>
<goal>prepare-agent</goal>
</goals>
<configuration>
<propertyName>jacoco.agent.argLine</propertyName>
<destFile>${jaCoCoExecutionDataFile}</destFile>
</configuration>
</execution>
<execution>
<id>jacoco-report</id>
<phase>test</phase>
<goals>
<goal>report</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<artifactId>maven-surefire-plugin</artifactId>
<version>${maven-surefire-plugin.version}</version>
<configuration>
<argLine>${jacoco.agent.argLine}</argLine>
<argLine>-Dfile.encoding=UTF-8</argLine>
</configuration>
</plugin>
</plugins>
<pluginManagement>
<plugins>
<!--This plugin's configuration is used to store Eclipse m2e settings
only. It has no influence on the Maven build itself. -->
<plugin>
<groupId>org.eclipse.m2e</groupId>
<artifactId>lifecycle-mapping</artifactId>
<version>${lifecycle-mapping.version}</version>
<configuration>
<lifecycleMappingMetadata>
<pluginExecutions>
<pluginExecution>
<pluginExecutionFilter>
<groupId>org.jacoco</groupId>
<artifactId>
jacoco-maven-plugin
</artifactId>
<versionRange>
[${jacoco-maven-plugin.version},)
</versionRange>
<goals>
<goal>prepare-agent</goal>
</goals>
</pluginExecutionFilter>
<action>
<ignore />
</action>
</pluginExecution>
</pluginExecutions>
</lifecycleMappingMetadata>
</configuration>
</plugin>
</plugins>
</pluginManagement>
</build>
<dependencies>
<!-- Jackson -->
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-core</artifactId>
<version>${jackson.version}</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-annotations</artifactId>
<version>${jackson.version}</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>${jackson.version}</version>
</dependency>
<!-- Spring -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-beans</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aop</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aspects</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-expression</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-tx</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${spring.version}</version>
</dependency>
<!-- Spring boot -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot</artifactId>
<version>${spring.boot.version}</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-autoconfigure</artifactId>
<version>${spring.boot.version}</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-logging</artifactId>
<version>${spring.boot.version}</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<version>${spring.boot.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>javax.enterprise</groupId>
<artifactId>cdi-api</artifactId>
<version>${cdi-api.version}</version>
</dependency>
<dependency>
<groupId>javax.transaction</groupId>
<artifactId>jta</artifactId>
<version>1.1</version>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-lang3</artifactId>
<version>${commons-lang3.version}</version>
</dependency>
<dependency>
<groupId>commons-validator</groupId>
<artifactId>commons-validator</artifactId>
<version>${commons-validator.version}</version>
</dependency>
<dependency>
<groupId>commons-io</groupId>
<artifactId>commons-io</artifactId>
<version>${commons-io.version}</version>
</dependency>
<!-- Logging -->
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>${slf4j.version}</version>
</dependency>
<dependency>
<groupId>ch.qos.logback</groupId>
<artifactId>logback-classic</artifactId>
<version>${logback.version}</version>
</dependency>
<!-- jUnit -->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>${junit.version}</version>
<scope>test</scope>
</dependency>
</dependencies>
<modules>
<module>domain</module>
<module>api</module>
<module>ui</module>
</modules>
</project>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<parent>
<artifactId>example</artifactId>
<groupId>com.example</groupId>
<version>0.0.1</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<artifactId>domain</artifactId>
<packaging>jar</packaging>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<neo4j.version>3.1.0</neo4j.version>
<lucene.version>5.5.0</lucene.version>
<spring-data-neo4j.version>4.2.0.BUILD-SNAPSHOT</spring-data-neo4j.version>
<neo4j-ogm.version>2.1.1-SNAPSHOT</neo4j-ogm.version>
<spring-social-security.version>1.1.4.RELEASE</spring-social-security.version>
<spring-security-oauth2.version>2.0.11.RELEASE</spring-security-oauth2.version>
<hibernate-validator.version>5.2.4.Final</hibernate-validator.version>
</properties>
<repositories>
<repository>
<id>spring-snapshots</id>
<name>Spring Snapshots</name>
<url>https://repo.spring.io/libs-snapshot</url>
<snapshots>
<enabled>true</enabled>
</snapshots>
</repository>
<repository>
<id>neo4j-snapshot-repository</id>
<name>Neo4j Maven 2 snapshot repository</name>
<url>http://m2.neo4j.org/content/repositories/snapshots</url>
<snapshots>
<enabled>true</enabled>
</snapshots>
<releases>
<enabled>true</enabled>
</releases>
</repository>
</repositories>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.5.1</version>
<configuration>
<source>${java.source.version}</source>
<target>${java.target.version}</target>
<encoding>${project.build.sourceEncoding}</encoding>
<optimize>true</optimize>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-resources-plugin</artifactId>
<version>2.6</version>
<configuration>
<encoding>${project.build.sourceEncoding}</encoding>
</configuration>
</plugin>
</plugins>
</build>
<dependencies>
<!-- neo4j -->
<dependency>
<groupId>org.neo4j</groupId>
<artifactId>neo4j-ogm-core</artifactId>
<version>${neo4j-ogm.version}</version>
</dependency>
<dependency>
<groupId>org.neo4j</groupId>
<artifactId>neo4j-ogm-http-driver</artifactId>
<version>${neo4j-ogm.version}</version>
</dependency>
<dependency>
<groupId>org.neo4j</groupId>
<artifactId>neo4j-ogm-embedded-driver</artifactId>
<version>${neo4j-ogm.version}</version>
</dependency>
<dependency>
<groupId>org.neo4j</groupId>
<artifactId>neo4j-ogm-bolt-driver</artifactId>
<version>${neo4j-ogm.version}</version>
</dependency>
<dependency>
<groupId>org.neo4j</groupId>
<artifactId>neo4j-enterprise</artifactId>
<version>${neo4j.version}</version>
<exclusions>
<exclusion>
<groupId>org.neo4j</groupId>
<artifactId>neo4j-security-enterprise</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.neo4j</groupId>
<artifactId>neo4j</artifactId>
<version>${neo4j.version}</version>
</dependency>
<dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-neo4j</artifactId>
<version>${spring-data-neo4j.version}</version>
</dependency>
<dependency>
<groupId>org.springframework.security</groupId>
<artifactId>spring-security-web</artifactId>
<version>4.1.3.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.social</groupId>
<artifactId>spring-social-security</artifactId>
<version>${spring-social-security.version}</version>
</dependency>
<dependency>
<groupId>org.springframework.security.oauth</groupId>
<artifactId>spring-security-oauth2</artifactId>
<version>${spring-security-oauth2.version}</version>
</dependency>
<!-- Lucene -->
<dependency>
<groupId>org.apache.lucene</groupId>
<artifactId>lucene-core</artifactId>
<version>5.5.0</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-validator</artifactId>
<version>${hibernate-validator.version}</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-security</artifactId>
<version>${spring.boot.version}</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-social-twitter</artifactId>
<version>${spring.boot.version}</version>
</dependency>
<dependency>
<groupId>com.google.guava</groupId>
<artifactId>guava</artifactId>
<version>19.0-rc1</version>
</dependency>
</dependencies>
</project>
<?xml version="1.0"?>
<project
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"
xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<parent>
<artifactId>example</artifactId>
<groupId>com.example</groupId>
<version>0.0.1</version>
</parent>
<modelVersion>4.0.0</modelVersion>
<artifactId>api</artifactId>
<packaging>war</packaging>
<properties>
<!-- example -->
<com.example.domain.version>0.0.1</com.example.domain.version>
<!-- 3rd party -->
<spring-security-core.version>4.1.3.RELEASE</spring-security-core.version>
<spring.social.google.version>1.0.0.RELEASE</spring.social.google.version>
<spring-social-github.version>1.0.0.M4</spring-social-github.version>
<javax.servlet-api.version>3.1.0</javax.servlet-api.version>
<javaee-web-api.version>7.0</javaee-web-api.version>
<json-path.version>2.0.0</json-path.version>
<rest-assured.version>2.8.0</rest-assured.version>
<httpclient>4.5.2</httpclient>
<springfox-swagger2.version>2.6.0</springfox-swagger2.version>
<gson.version>2.6.2</gson.version>
<maven-compiler-plugin.version>3.3</maven-compiler-plugin.version>
<maven-war-plugin.version>2.6</maven-war-plugin.version>
<java.source.version>1.8</java.source.version>
<java.target.version>1.8</java.target.version>
</properties>
<profiles>
<profile>
<id>local</id>
<activation>
<activeByDefault>true</activeByDefault>
</activation>
</profile>
<profile>
<id>prod</id>
</profile>
</profiles>
<dependencies>
<!-- example -->
<dependency>
<groupId>com.example</groupId>
<artifactId>domain</artifactId>
<version>${com.example.domain.version}</version>
</dependency>
<dependency>
<groupId>org.springframework.security</groupId>
<artifactId>spring-security-core</artifactId>
<version>${spring-security-core.version}</version>
</dependency>
<dependency>
<groupId>org.springframework.security</groupId>
<artifactId>spring-security-config</artifactId>
<version>4.1.3.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.security</groupId>
<artifactId>spring-security-jwt</artifactId>
<version>1.0.5.RELEASE</version>
</dependency>
<!-- Spring Boot -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
<version>${spring.boot.version}</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
<version>${spring.boot.version}</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-security</artifactId>
<version>${spring.boot.version}</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
<version>${spring.boot.version}</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
<version>${spring.boot.version}</version>
</dependency>
<!-- Spring Boot Social Providers -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-social-facebook</artifactId>
<version>${spring.boot.version}</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-social-linkedin</artifactId>
<version>${spring.boot.version}</version>
</dependency>
<!-- Spring Social Providers -->
<dependency>
<groupId>org.springframework.social</groupId>
<artifactId>spring-social-google</artifactId>
<version>${spring.social.google.version}</version>
</dependency>
<dependency>
<groupId>org.springframework.social</groupId>
<artifactId>spring-social-github</artifactId>
<version>${spring-social-github.version}</version>
</dependency>
<dependency>
<groupId>com.jayway.jsonpath</groupId>
<artifactId>json-path</artifactId>
<version>${json-path.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>com.jayway.jsonpath</groupId>
<artifactId>json-path-assert</artifactId>
<version>${json-path.version}</version>
<scope>test</scope>
</dependency>
<!-- default j2ee dependencies -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>${javax.servlet-api.version}</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>javax</groupId>
<artifactId>javaee-web-api</artifactId>
<version>${javaee-web-api.version}</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpclient</artifactId>
<version>${httpclient}</version>
</dependency>
<!-- Swagger2 -->
<dependency>
<groupId>io.springfox</groupId>
<artifactId>springfox-swagger2</artifactId>
<version>${springfox-swagger2.version}</version>
</dependency>
<dependency>
<groupId>io.springfox</groupId>
<artifactId>springfox-swagger-ui</artifactId>
<version>${springfox-swagger2.version}</version>
</dependency>
<dependency>
<groupId>com.jayway.restassured</groupId>
<artifactId>rest-assured</artifactId>
<version>${rest-assured.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>com.google.code.gson</groupId>
<artifactId>gson</artifactId>
<version>${gson.version}</version>
</dependency>
<dependency>
<groupId>javax.xml.bind</groupId>
<artifactId>jaxb-api</artifactId>
<version>2.2.12</version>
</dependency>
</dependencies>
<build>
<resources>
<resource>
<filtering>true</filtering>
<directory>${project.basedir}/src/main/resources</directory>
</resource>
</resources>
<testResources>
<testResource>
<directory>${project.basedir}/src/test/resources</directory>
<filtering>true</filtering>
</testResource>
</testResources>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<configuration>
<addResources>false</addResources>
<jvmArguments>
-Xdebug
-Xrunjdwp:transport=dt_socket,server=y,suspend=n,address=5005
</jvmArguments>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<version>${maven-compiler-plugin.version}</version>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>${java.source.version}</source>
<target>${java.target.version}</target>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-war-plugin</artifactId>
<version>${maven-war-plugin.version}</version>
<configuration>
<failOnMissingWebXml>false</failOnMissingWebXml>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-resources-plugin</artifactId>
<configuration>
<encoding>${project.build.sourceEncoding}</encoding>
</configuration>
</plugin>
</plugins>
</build>
</project>

Answer 1

#Configuration
public class WebConfiguration extends WebMvcConfigurationSupport {
#Override
public void addResourceHandlers(ResourceHandlerRegistry registry）{
registry.addResourceHandler("/**")
.addResourceLocations("classpath:/static/");
}
}
I hope this helps you!
Maybe you have added #EnableWebMvc which looks for handlers corresponding to /api/images/social/facebook/f_logo.jpg.
Just remove that & provide WebMvcConfigurer or WebMvcConfigurationSupport similar to what I have posted.

Answer 2

Same problem with me. (Spring Boot 2)
I resolve below.
Step 1: Move images folder from src/main/resources/static/images to src/main/webapp/WEB-INF/images
Step 2: Look up SpringBootMainApplication.java add code
#Override
public void addResourceHandlers(ResourceHandlerRegistry registry) {
// Register resource handler for images
registry.addResourceHandler("/images/**").addResourceLocations("/WEB-INF/images/")
.setCacheControl(CacheControl.maxAge(2, TimeUnit.HOURS).cachePublic());
}
Step 3: Run program and go to browser http://localhost:8080/images/logo.png
If your set contextRoot http://localhost:8080/project/images/logo.png
Full Code:
#SpringBootApplication
public class MainApplication implements WebMvcConfigurer {
private static Logger logger = LoggerFactory.getLogger(MainApplication.class.getName());
#Override
public void addResourceHandlers(ResourceHandlerRegistry registry) {
// Register resource handler for images
registry.addResourceHandler("/images/**").addResourceLocations("/WEB-INF/images/")
.setCacheControl(CacheControl.maxAge(2, TimeUnit.HOURS).cachePublic());
}
public static void main(String[] args) {
SpringApplication.run(MainApplication.class, args);
}
}
Work for me.
Additional
Or you can set below, If you want using in resources folder.
#Override
public void addResourceHandlers(ResourceHandlerRegistry registry) {
registry.addResourceHandler("/resources/**").addResourceLocations("classpath:/statics/")
.setCacheControl(CacheControl.maxAge(2, TimeUnit.HOURS).cachePublic());
}
Because after deploy project structure below.
http://localhost:8080/images/logo.png
or
http://localhost:8080/project/images/logo.png
Sorry for English.

Answer 3

in your application properties file set the following line :
spring.resources.static-locations=file:///c:/{yourWorkSpace}/{projectName}/src/main/resources/static/
this is tested.

Answer 4

Here's a clean solution to serve from resources folder. Tested on Spring Boot v2.1.4.RELEASE.
#Configuration
public class WebConfig implements WebMvcConfigurer {
#Override
public void addResourceHandlers(ResourceHandlerRegistry registry) {
registry.addResourceHandler("/**")
.addResourceLocations("classpath:/static/","classpath:/image/")
.setCachePeriod(0);
}
}
You can make this a nested class of Application (or whichever class of yours extends SpringBootServletInitializer). You can declare many folders like
.addResourceLocations("classpath:/static/","classpath:/image/","classpath:/largeimage/","classpath:/pdf/")
Make sure src/main/resources is a source folder, and the folders you specify are directly under it.
Then you can simply display images like this in your html or jsp files.
<img src="ok.png"/>

Answer 5

Just keep your images in path which you have given \src\main\resources\static\images\social\facebook\f_logo.jpg and while loading images in JSP, give relative path to resources/static like this src="/images/social/facebook/f_logo.jpg". This will load the image.

Answer 6

Instead of http://localhost:8080/api/images/social/facebook/f_logo.jpg,
try this
http://localhost:8080/images/social/facebook/f_logo.jpg
It should work as the default path starts from /, not /api

Answer 7

After some research and reproduce I can confirm that your provided resource path and your link is correct.
In your pom.xml you have many "not Spring-boot related" dependencies. If you want to go further with this configuration, you need to follow gipple lake's answer because you are not using the autoconfiguration of spring-boot-web.
But if you want to get to out of the box solution I would suggest to replace the Spring core dependencies with the Spring-boot related ones.
For example use:
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
instead of:
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${spring.version}</version>
</dependency>
Maybe you should also add the boot starter dependency:
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>

Answer 8

I have faced same issue while running spring boot application using apache tomcate 9.0.
rightnow resolved the same.
1. i have added validation.properties file in my app. folder structure looking like below,
--src/main/resources
--static
--application.properties
--validations.properties
2. next i have moves images,css and js folder under src/main/webapp folder.
3. next i have done below three steps,
--cleaned project
--maven install
--update project
4. finally ran application ,it was working successfully.

Answer 9

Can you show us your configuration files?
You got 404 when the url is not mapped, please provide us the controller.
Also you might have a look at: How to handle static content in Spring MVC? and http://www.baeldung.com/spring-mvc-static-resources (tutorial)