Injecting a classpath resource into a Spring 3 bean

Question

There is a property of type Resource in my Spring 3 bean that should be injected with a reference to a file in the classpath. I use the @Value annotation as below to hopefully achieve this.

public class TestBean
{
    @Value("classpath:/abc/student/test.sql")
    private Resource SqlFile;
    ...
}

But the property is always null. I have confirmed that the sql file has been deployed in the maven target directory (it is at target/classes/abc/student/test.sql).

The closest solutions that I could google were this and this which detail the xml way whereas I am interested in doing this using annotations.

Appreciate any pointers on what could be wrong here.

Thanks,

Vijay

score 48 · Accepted Answer · answered Aug 11 '11 at 01:04

48

If it's going to be hard-coded like that, then just

private Resource sqlFile = new ClassPathResource("/abc/student/test.sql");

Otherwise, what you're really after is

@Value("${some.property}")
private Resource sqlFile;

and I believe that in injecting the property value, the correct PropertyEditor will be applied.

answered Aug 11 '11 at 01:04

Ryan Stewart

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1

Agreed - see http://stackoverflow.com/questions/6392406/populate-spring-beans-file-field-via-annotation/6392724#6392724 – sourcedelica Aug 11 '11 at 02:35
Thank you for your replies. Both the solutions worked. I preferred the @Value approach as it permits no dependency on Spring classes from my code. – Babu Subburathinam Aug 11 '11 at 04:30
2

You do know that @Value is a spring class? – Wes Sep 22 '17 at 14:50

score 3 · Answer 2 · answered Jul 06 '18 at 15:51

3

If you don't want to specify a property then this should work

@Value("${:classpath:json/inventory.json}")
Resource inventory;

answered Jul 06 '18 at 15:51

deFreitas

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Injecting a classpath resource into a Spring 3 bean

2 Answers2