CODEWITHSUNDEEP
javaspringpropertiesio
membersound
membersound

Reputation: 86637

How to inject a keyvalue properties file with Spring?

I have a keyvalue properties file that contains error codes and their error messages.

I'd like to inject this file on application startup, so that I can make lookups on the injected property without having to read the file.

The following is just pseudocode, is there anything in Spring that could create this setup?

@Value(location = "classpath:app.properties")
private Properties props;

whereas app.properties contains:

error1=test
error2=bla
...

If not, how could I achieve this without spring?

Upvotes: 2

Views: 1330

Answers (4)

membersound
membersound

Reputation: 86637

Thanks to the help of "kocko", the following setup works as expected, only annotation config:

@Bean(name = "errors")
public PropertiesFactoryBean mapper() {
    PropertiesFactoryBean bean = new PropertiesFactoryBean();
    bean.setLocation(new ClassPathResource("errors.properties"));
    return bean;
}

@Resource(name = "errors")
private Properties errors;

Or if the resource should not be provided as a bean, but simply be loaded inside a @Component:

@Component
public class MyLoader {
    private Properties keys;

    @PostConstruct
    public void init() throws IOException {
        PropertiesFactoryBean bean = new PropertiesFactoryBean();
        bean.setLocation(new ClassPathResource("app.properties"));
        bean.afterPropertiesSet();
        keys = bean.getObject();
    }
}

Upvotes: 1

Mladen Uzelac
Mladen Uzelac

Reputation: 1261

@M Sach You can also use property location instead locations, so you don't have to use list

Upvotes: 0

M Sach
M Sach

Reputation: 34424

i am doing it this way in my project

  <bean id="myPropertyHolder" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
    <property name="locations">
      <list>
         <value>classpath:myApplication.properties</value> 
      </list>
    </property>
  </bean>

Then use the property like below

<property name="testProperty" value="${testProperty}" />

Upvotes: 0

Konstantin Yovkov
Konstantin Yovkov

Reputation: 62854

You can first declare the properties files as a such, by using <util:properties> in your Spring configuration:

<util:properties id="messages" location="classpath:app.properties" />

This registers a bean with name messages, which you can autowire/inject in other beans.

@Autowired
@Qualifier("messages")
private Properties props;

More info:

Upvotes: 2

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