classpath wildcard in @PropertySource

@PropertySource API: Resource location wildcards (e.g. **/*.properties) are not permitted; each location must evaluate to exactly one .properties resource.

workaround: try

@Configuration
public class Test {

    @Bean
    public PropertyPlaceholderConfigurer getPropertyPlaceholderConfigurer()
            throws IOException {
        PropertyPlaceholderConfigurer ppc = new PropertyPlaceholderConfigurer();
        ppc.setLocations(new PathMatchingResourcePatternResolver().getResources("classpath:/**/abc.properties"));
        return ppc;
    }

Addidtionally to dmay workaround:

Since Spring 3.1 PropertySourcesPlaceholderConfigurer should be used preferentially over PropertyPlaceholderConfigurer and the bean should be static.

@Configuration
public class PropertiesConfig {

  @Bean
  public static PropertySourcesPlaceholderConfigurer placeHolderConfigurer() {
    PropertySourcesPlaceholderConfigurer propertyConfigurer = new PropertySourcesPlaceholderConfigurer();
    propertyConfigurer.setLocations(new PathMatchingResourcePatternResolver().getResources("classpath:/**/abc.properties"));
    return propertyConfigurer;
  }

}