Hands-On High Performance with Spring 5

Java-based configuration

In the previous section, we saw how to configure a bean using XML-based configuration. In this section, we will see the Java-based configuration. The same as XML, Java-based configuration also injects dependency explicitly. The following example defines the Spring bean and its dependencies:

@Configurationpublic class AppConfig {     @Bean  public CustomerService showCustomerAccountBalance() {    return new CustomerService();  }    @Bean  public BankingService getBankingService() {    return new BankingService();  }  }

In the Java-based configuration, we must annotate the class with @Configuration, and the declaration of the bean can be achieved with the @Bean annotation. The previous example of a Java-based configuration is equivalent ...