Why is @ConfigurationProperties not overriding def

问题:

I want spring boot to read my config from entries in my application.properties but they are not activated. My application.properties contains these entries:

foo.user=nobody
foo.pass=notshared

I can see that this file is being read (I only have the file twice: once in the src-tree and once copied automatically in bin. The files are equal):

2015-03-23 21:55:18.199 DEBUG 25004 --- [main] o.s.b.c.c.ConfigFileApplicationListener  : Loaded config file 'classpath:/application.properties' 

I have a class called FooConfig:

@Component
@ConfigurationProperties(prefix = "foo")
public class FooConfig {
  private String user = "default";
  private String pass = "default";
...
}

I have getters and setters for both values. I AutoWire this config class into my code:

@Component
public class FooFunctions {
    @Autowired
    public FooFunctions(FooConfig fooConfig) {
        log.debug("user={}", fooConfig.getUser());
...

And the problem is that the default value "default" is printed and not the value from the application.properties. Any hints ? Unfortunately I can not use the actuator yet to display configuration properties because this is a non-web application. I try all of this on spring boot 1.2.2

回答1:

In order to make

@ConfigurationProperties(prefix = "foo")

annotation work, your spring boot application must have

@EnableConfigurationProperties

annotation set.

There is no need to set @Component annotation on ConfigurationProperties bean.