7. 使用 java 方式配置 Spring

1. 配置类

   package config;
   
   import org.springframework.context.annotation.Bean;
   import org.springframework.context.annotation.ComponentScan;
   import org.springframework.context.annotation.Configuration;
   import org.springframework.context.annotation.Import;
   import pojo.User;
   
   /**
   * 类描述
   * -@Configuration:代表这是一个配置类,相当于之前的beans.xml
   * -@Bean:注册bean,相当于 <bean id="user" class="pojo.User"/> 方法名就是id 方法返回值就是class
   * -@ComponentScan("pojo"):包扫描 <context:component-scan base-package="pojo"/>
   * -@Import(ConfigClassT.class):引入其他配置文件 <import resource="ConfigClassT.xml"/>
   */
   @Configuration
   @ComponentScan("pojo")
   @Import(ConfigClassT.class)
   public class ConfigClass {
       @Bean
       public User getUser() {
           return new User();
       }
   }
   

2. 实体类

   @Component
   @Data
   public class User {
       @Value("name")
       private String name;
   }
   

3. 测试

   public class MyTestSpring5 {
       @Test
       public  void Test() {
           ApplicationContext context = new AnnotationConfigApplicationContext(ConfigClass.class);
           User getUser = context.getBean("getUser", User.class);
           System.out.println(getUser.getName());
       }
   }