resources in a Spring Boot application are missing from jar file when using Spring Boot Maven Plugin

Question

I am using Spring-Boot v1.3.0.M5 with Maven v3.3.3. I used to be able to run my Spring Boot (boot) application from the console with this command.

mvn clean package spring-boot:run

However, I've had to revise my pom.xml to account for different environment builds. In particular, I am using Maven profiles to modify the properties files of boot application. Now when I run the previously mentioned command, the boot application fails to run and complains with the following exception.

Caused by: java.lang.NumberFormatException: For input string: "${MULTIPART.MAXREQUESTSIZE}"

I have a properties file located at src/main/resources/config/application.properties. And this properties file has a bunch of key-value pairs which looks like the following.

multipart.maxFileSize=${multipart.maxFileSize}
multipart.maxRequestSize=${multipart.maxRequestSize}

Then in my pom.xml, my build is defined as follows.

<build>
    <resources>
        <resource>
            <directory>src/main/resources</directory>
            <filtering>true</filtering>
            <includes>
                <include>**/*.properties</include>
            </includes>
        </resource>
        <resource>
            <directory>src/main/resources</directory>
            <filtering>false</filtering>
            <excludes>
                <exclude>**/*.properties</exclude>
            </excludes>
        </resource>
    </resources>
    <plugins>
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
        </plugin>
    </plugins>
</build>
<profiles>
    <!-- development -->
    <profile>
        <id>env-dev</id>
        <activation>
            <activeByDefault>true</activeByDefault>
            <property>
                <name>env</name>
                <value>dev</value>
            </property>
        </activation>
        <properties>
            <multipart.maxFileSize>250MB</multipart.maxFileSize>
            <multipart.maxRequestSize>250MB</multipart.maxRequestSize>
        </properties>
    </profile>
    <!-- staging -->
    <profile>
        <id>env-stg</id>
        <activation>
            <activeByDefault>false</activeByDefault>
            <property>
                <name>env</name>
                <value>stg</value>
            </property>
        </activation>
        <properties>
            <multipart.maxFileSize>500MB</multipart.maxFileSize>
            <multipart.maxRequestSize>500MB</multipart.maxRequestSize>
        </properties>
    </profile>
<profiles>

I noticed that if I type in mvn clean package and look inside the jar file, the application.properties file is inside the jar.

However, if I type in mvn clean package spring-boot:run, then the applications.properties file is not inside the jar. In fact, nothing under src/main/resources makes it into the jar file.

This problem is a little annoying for me because if I want to run my boot application from the command line, I have to do two steps now.

1. mvn clean package
2. java -jar ./target/app-0.0.1-SNAPSHOT.jar

Any ideas on what I am doing wrong?

Answer 1

As described in the documentation mvn spring-boot:run adds src/main/resources in front of your classpath to support hot reload by default. You can turn this off easily

<build>
  ...
  <plugins>
    ...
    <plugin>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-maven-plugin</artifactId>
      <version>1.2.7.RELEASE</version>
      <configuration>
        <addResources>false</addResources>
      </configuration>
    </plugin>
    ...
  </plugins>
  ...
</build>