Autowire a bean within Spring's Java configuration

Question

Is it possible to use Spring\'s @Autowired annotation within a Spring configuration written in Java?

For example:

@Configuration
public          


        

Answer 1

For completeness sake: Yes it is technically possible to use @Autowired annotation in spring @Configuration classes, and it works the same way as for other spring beans. But the accepted answer shows how the original problem should be solved.

Answer 2

beans configured with @Configuration class can't be autowired ,

So you cannot use @Autowiring and @configuration together

Answer 3

If you need a reference to the DataSource bean within the same @Configuration file, just invoke the bean method.

@Bean
public OtherBean someOtherBean() {
    return new OtherBean(dataSource());
}

or have it autowired into the @Bean method

@Bean
public OtherBean someOtherBean(DataSource dataSource) {
    return new OtherBean(dataSource);
}

The lifecycle of a @Configuration class sometimes prevents autowiring like you are suggesting.

Answer 4

maybe you can use constructor to inject some bean from other configuration file to your configuration，while @Autowired may not work correct in the configuration file

@Configuration
public class AppConfig {
  private DataSource dataSource;

  public AppConfig(DataSource dataSource) {
    this.dataSource = dataSource;
  }

  @Bean
  public OtherBean otherBean(){
    return new OtherBean(dataSource);
  }
}