Spring基于java方式的配置

@configuration注解可以完全使用java的方式配置Spring

完全不使用xml配置，全权交由java来做

• 创建实体类Student

@AllArgsConstructor
@NoArgsConstructor
@Data
@Component
public class Student{
    private int id;
    private String name;
}

• 创建配置类MyConfig

@Configuration
@import(MyConfig2.class)  //导入合并其他配置类，类似于配置文件中的 inculde 标签
public class MyConfig {
    @Bean
    public Student student(){
        return new Student(1,"xxxxxxxx");
    }
}

测试：

public class Test01 {
    public static void main(String[] args) {
        ApplicationContext applicationContext =
                new AnnotationConfigApplicationContext(MyConfig.class);
        Student student = applicationContext.getBean("student", Student.class);
        System.out.println(student);
    }

    @Test
    public void test2(){
        ApplicationContext applicationContext =
                new AnnotationConfigApplicationContext(MyConfig.class);
        Object student = applicationContext.getBean("student");
        System.out.println(student);
    }
}