springboot reads the configuration file

1.propertie configuration data read 

/ ** 
 * value by taking the data in the configuration file 
 * / 
@Component 
@PropertySource (value = { "config / db-config.properties" })   
 public  class InfoConfig1 { 

    @Value ( "{$ } db.username " )
     Private String useranme; 
    @Value ( " db.Password $ {} " )
     Private String password; 

    public String getUseranme () {
         return useranme; 
    } 

    public  void setUseranme (String useranme) {
         the this .useranme = useranme; 
    } 

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    @Override
    public String toString() {
        return "";
    }

}

2.取值

@RestController
public class InConfigController {
    @Autowired
    private Environment env;
    @Value("${db.username}")
    private String username;

    @RequestMapping(value = "/info")
    public String getValue() {
        String username = env.getProperty("db.username");
        String password = env.getProperty("db.password");
        return username;
    }

    @RequestMapping(value = "/info2")
    public void getValue1() {
        System.out.println(username);
    }
}