Question

主：

@SpringBootApplication
@ComponentScan(basePackageClasses = Application.class)
public class Application {

  public static void main(String[] args) {
      SpringApplication.run(Application.class, args);
  }
}

测试类：

public class Test {

  @Bean
  public Test test(){
      return new Test();
  }
}

当我试图自动装配时，我得到了这个例外：

***************************
APPLICATION FAILED TO START
***************************

Description:

Field test in TestWithAutowire required a bean of type 'Test' that could not be found.


Action:

Consider defining a bean of type 'rcms.backend.exception.Test' in your configuration.


Process finished with exit code 1

有些事情我做错了，但我找不到。

Answer 1

您可以创建新配置，例如SpringConfiguration，

package my.pkg.config;

@Configuration
public class SpringConfiguration {
    @Bean
    public Test test(){
        return new Test();
    }
}

在Application类中，您可以添加@ComponentScan注释以及您希望Spring扫描类的基础包，

@SpringBootApplication
@ComponentScan(basePackageClasses = {"my.pkg.config", "my.pkg.example"})
public class Application {

  public static void main(String[] args) {
      SpringApplication.run(Application.class, args);
  }
}

现在，您可以在任何Spring组件中自动装配Test。例如，

package my.pkg.example;

@Component
public class TestExample {

    @Autowired
    private Test tst;

}

如何使用注释Bean和ComponentScan正确创建bean Spring？

1 个答案: