崛起于Springboot2.X+事件监听器（71）

Z时代
2024-01-10
分类：综合

《SpringBoot2.X心法总纲》

事件主题：认识一个女孩之后，触发事件监听，得到结果：认识到了一个女孩

1、配置

@Component
public class Girl {
    private String id;
    private String name;
    public String getId() {
        return id;
    }
    public void setId(String id) {
        this.id = id;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
}

@Component
public class UnderstandEvent extends ApplicationEvent {
    public UnderstandEvent(Girl source) {
        super(source);
    }
    public Girl know(){
        return (Girl) getSource();
    }
}

2、事件发布

@Service
public class GirlService {
    @Autowired
    ApplicationEventPublisher applicationEventPublisher;
    public void knowGirl(Girl girl){
        applicationEventPublisher.publishEvent(new UnderstandEvent(girl));
    }
    @EventListener
    public void afterKnow(UnderstandEvent understandEvent){
        Girl girl = understandEvent.know();
        System.out.println("认识了一个新女孩，她的名字叫" + girl.getName());
    }
}

3、contoller层

@Autowired
GirlService girlService;
@GetMapping(value = "/know")
public void know(){
    Girl girl = new Girl();
    girl.setId("12323");
    girl.setName("杨幂");
    girlService.knowGirl(girl);
}