SpringBoot：@Async实现异步方法调用-蒲公英云

SpringBoot：@Async实现异步方法调用

亦凉 2022-04-02 08:16 403阅读 0赞

一，@Async注解

@Async是SprngBoot框架提供的框架内部已经整合好的异步调用方式。在入口处开启异步调用按钮，然后在调用方法上直接添加该注解，就可以自动实现异步调用。

二，异步发送类

package com.gupao.springboot.test.controller;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
/**
 * SpringBoot异步调用测试
 * @author pj_zhang
 * @create 2018-12-25 21:19
 **/
@RestController
@Slf4j
public class AsyncController {
    // 注入消费者类
    @Autowired
    private ProcessorController processorController;
    @RequestMapping("/sendMlessage")
    public String sendMessage() {
        log.info("start sendMessage ====== " + 1);
        // 该方法添加了@Async注解, 实现异步调用
        processorController.processor();
        log.info("end sendMessage ===== " + 4);
        return "SUCCESS";
    }
}

三，异步接收类

package com.gupao.springboot.test.controller;
import lombok.extern.slf4j.Slf4j;
import org.springframework.scheduling.annotation.Async;
import org.springframework.stereotype.Controller;
/**
 * 异步接收类
 * @author pj_zhang
 * @create 2018-12-25 21:22
 **/
@Controller
@Slf4j
public class ProcessorController {
    // 添加异步注解
    @Async
    public void processor() {
        log.info("start processor ====== " + 2);
        try {
            // 睡眠2S查看异步效果
            Thread.sleep(2000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        log.info("end processor ====== " + 3);
    }
}

四，SpringBoot程序主入口开启异步

package com.gupao.springboot;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.scheduling.annotation.EnableAsync;
@SpringBootApplication
// 开启异步消息
@EnableAsync
public class GupaoSpringbootApplication {
    public static void main(String[] args) {
        SpringApplication.run(GupaoSpringbootApplication.class, args);
    }
}

五，效果演示

\* 发送消息线程沉睡1S，再次尝试
@RequestMapping("/sendMlessage")
    public String sendMessage() {
        log.info("start sendMessage ====== " + 1);
        processorController.processor();
        try {
            Thread.sleep(1000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        log.info("end sendMessage ===== " + 4);
        return "SUCCESS";
    }