Spring boot default resource

Question

I am getting resource with the following manner.

@Value("classpath:user-pass.json")
private Resource resource;

I want to set a default value for the resource if the above resource not found. We can set default value in property extraction as follow

@Value("${some.key:my default value}")
private String string;

I need help in applying a similar formula to resource acquiration.

Resource above is from

package org.springframework.core.io

Can you please add the `Resource` class definition? Or is it https://docs.spring.io/spring-framework/docs/current/javadoc-api/org/springframework/core/io/Resource.html? — João Dias, Sep 21 '21 at 18:16
The same will work for a `Resource`. The type doesn't matter. — M. Deinum, Sep 22 '21 at 05:31
@M.Deinum but could not find the syntax for that. can you clarify? There is already colon. — Davis, Sep 22 '21 at 16:11
There is no difference. See https://stackoverflow.com/a/31711412/2696260 just do `${some.key:classpath:user-pass.json}` (assuming you are on Spring 4.2 or up) and it should just work. — M. Deinum, Sep 23 '21 at 05:21
${classpath:model.json:classpath:default.json} does not work. — Davis, Sep 23 '21 at 17:55

score 0 · Answer 1 · answered Sep 21 '21 at 18:32

I don't think this is possible. I would say that your best option would be to load the Resource yourself if it is null after Bean creation:

@PostConstruct
private void postConstruct() {
    if (resource == null) {
        resource = new ClassPathResource("default.json");
    }
}

1 Answers1