SpringBoot中ApplicationEvent的使用步骤详解

package com.example.event;
import lombok.Getter;
import lombok.Setter;
import lombok.ToString;
import org.springframework.context.ApplicationEvent;
/**
 * @Description: 封装消息
 * @author: zeal
 * @date: 2024年04月09日 10:22
 */
@Setter
@Getter
@ToString
public class UserLoginEvent extends ApplicationEvent {
    private Integer userId;
    private String token;
    public UserLoginEvent(Object source,Integer userId,String token) {
        super(source);
        this.userId=userId;
        this.token=token;
    }
}

package com.example.event;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.ApplicationContext;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
/**
 * @Description: 消息推送
 * @author: zeal
 * @date: 2024年04月09日 10:26
 */
@RestController
@RequestMapping("event")
public class UserLoginController {
    @Autowired
    private ApplicationContext applicationContext;
    @RequestMapping("/push")
    public void pushEvent(){
        UserLoginEvent userLoginEvent=new UserLoginEvent(this,001,"zsaf");
        applicationContext.publishEvent(userLoginEvent);
    }
}

package com.example.event;
import org.springframework.context.ApplicationListener;
import org.springframework.stereotype.Component;
/**
 * @Description: 监听消息
 * @author: zeal
 * @date: 2024年04月09日 10:25
 */
@Component
public class UserLoginEventListener implements ApplicationListener<UserLoginEvent> {
    @Override
    public void onApplicationEvent(UserLoginEvent event) {
        System.out.println("收到消息："+event.toString());
    }
}

package com.example.event;
import org.springframework.context.event.EventListener;
import org.springframework.stereotype.Component;
/**
 * @Description: 监听消息
 * @author: zeal
 * @date: 2024年04月09日 10:25
 */
@Component
public class UserLoginEventListener{
    @EventListener
    public void onApplicationEvent(UserLoginEvent event) {
        System.out.println("收到消息："+event.toString());
    }
}