specify files in resources folder in spring application.properties file

Question

I have a Spring Boot application, the code need to access a file under resources folder. here is my application.properties file:

cert.file=classpath:/resources/cert.p12

however it always complained:

java.io.FileNotFoundException: classpath:/resources/cert.p12 (No such file or directory)

I double checked folder my_project/target/classes to make sure the file cert.p12 exits there.

and in the code I tried to access the file:

@Value("${cert.file}")
private String certFile;
....
@Bean
public Sender sender() {
    return new Sender(certFile);
}

what exactly is the this classpath? and why it cannot find the file? Thanks!

Answer 1

Classpath includes what you have inside you resources dir.

Try:

cert.file=classpath:cert.p12

I'm assuming that you have standard maven catalog structure.

Answer 2

This syntax doesn't work with a normal FileInputStream. Use the Spring Resourceloader instead.

@Autowired
private ResourceLoader resourceLoader;

@Value("${property.name}")
private String property;

File getPropertyFile(){
    return resourceLoader.getResource(property).getFile();
}

application.properties

property.name=classpath:filename.txt