Spring boot index not loading

Question

I've got a Spring boot application.

I'm not using @EnableWebMvc and I've got my resources in the src/main/resources/static folder. When I try to load localhost:8080/ui/ it just downloads a random file (type: octet-stream). If I directly use /ui/index.html it does work.

I'm also using a WebSecurityConfigurerAdapter, but this does not seem to be the cause of problem.

Has anyone encountered this before? I would like it to load the index.html file when I request localhost:8080/ui/

How I start my application:

package my.package;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.netflix.zuul.EnableZuulProxy;
import org.springframework.data.jpa.repository.config.EnableJpaRepositories;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;

//@EnableWebMvc //Breaks js resource loading
@SpringBootApplication
@EnableJpaRepositories
@EnableZuulProxy
public class MyApplication {

    public static void main(String[] args) {
        SpringApplication.run(MyApplication.class, args);
    }
}

My pom.xml file

<?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>nl.jaarsma</groupId>
    <artifactId>my-application</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>

    <name>my-application</name>
    <description>Example app</description>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.5.9.RELEASE</version>
        <relativePath /> <!-- lookup parent from repository -->
    </parent>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>1.8</java.version>
    </properties>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-dependencies</artifactId>
                <version>Dalston.RELEASE</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>
    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-zuul</artifactId>
        </dependency>
<!--        <dependency> -->
<!--            <groupId>org.springframework.boot</groupId> -->
<!--            <artifactId>spring-boot-starter-actuator</artifactId> -->
<!--        </dependency> -->

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-rest</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>com.h2database</groupId>
            <artifactId>h2</artifactId>
            <!-- <scope>runtime</scope> -->
        </dependency>

        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>

        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-collections4</artifactId>
            <version>4.1</version>
        </dependency>

        <dependency>
            <groupId>commons-codec</groupId>
            <artifactId>commons-codec</artifactId>
            <version>1.6</version>
        </dependency>


<!--        <dependency> -->
<!--            <groupId>org.springframework.boot</groupId> -->
<!--            <artifactId>spring-boot-starter-thymeleaf</artifactId> -->
<!--        </dependency> -->

<!--        <dependency> -->
<!--            <groupId>org.springframework.boot</groupId> -->
<!--            <artifactId>spring-boot-starter-test</artifactId> -->
<!--            <scope>test</scope> -->
<!--        </dependency> -->
<!--        <dependency> -->
<!--            <groupId>org.springframework.security</groupId> -->
<!--            <artifactId>spring-security-test</artifactId> -->
<!--            <scope>test</scope> -->
<!--        </dependency> -->

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-security</artifactId>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>


    <profiles>
        <profile>
            <id>include-ui</id>
            <build>
            <plugins>
                <plugin>
                    <groupId>com.github.eirslett</groupId>
                    <artifactId>frontend-maven-plugin</artifactId>

                    <configuration>
                        <workingDirectory>ui</workingDirectory>
                    </configuration>
                    <executions>
                        <execution>
                            <id>install node and npm</id>
                            <goals>
                                <goal>install-node-and-npm</goal>
                            </goals>
                            <configuration>
                                <nodeVersion>v6.11.1</nodeVersion>
                                <npmVersion>3.10.10</npmVersion>
                            </configuration>
                        </execution>

                        <execution>
                            <id>npm install</id>
                            <goals>
                                <goal>npm</goal>
                            </goals>
                            <configuration>
                                <arguments>install</arguments>
                            </configuration>
                        </execution>

                        <execution>
                            <id>npm run build</id>
                            <goals>
                                <goal>npm</goal>
                            </goals>
                            <configuration>
                                <arguments>run build</arguments>
                            </configuration>
                        </execution>

                    </executions>
                </plugin>
            </plugins>

                <resources>
                    <resource>
                        <directory>src/main/resources</directory>
                    </resource>
                    <resource>
                        <filtering>false</filtering>
                        <directory>ui/dist</directory>
                        <includes>
                            <include>**</include>
                        </includes>
                        <targetPath>static/ui</targetPath>
                    </resource>
                </resources>
            </build>
        </profile>
    </profiles>
</project>

Answer 1

Spring Boot will automatically add static web resources located within any of the following directories: Link

/META-INF/resources/
/resources/
/static/
/public/

By default Spring Boot serves static content from resources in the classpath at "/static" (or "/public").

The index.html resource is special because it is used as a "welcome page" if it exists, which means it will be served up as the root resource, i.e. at http://localhost:8080/ in our example. Link

for your case you need to tell spring location of your index.html

public class MyApplication {


    @Bean
    WebMvcConfigurer configurer () {
        return new WebMvcConfigurerAdapter() {
            @Override
            public void addResourceHandlers (ResourceHandlerRegistry registry) {
                registry.addResourceHandler("/ui/").
                          addResourceLocations("classpath:/static/ui/index.html");
            }
        };
    }


    public static void main(String[] args) {
        SpringApplication.run(MyApplication.class, args);
    }
}