首先创建线程池

@EnableAsync
@Configuration
@Component
public class TaskPoolConfig {

    @Bean("taskExecutor")
    public ThreadPoolTaskExecutor taskExecutor(){
        ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
        //核心线程数：线程池创建时候初始化的线程数
        executor.setCorePoolSize(5);
        // 最大线程数：线程池最大的线程数，只有在缓冲队列满了之后才会申请超过核心线程数的线程
        executor.setMaxPoolSize(20);
        // 缓冲队列：用来缓冲执行任务的队列
        executor.setQueueCapacity(80);
        //允许线程的空闲时间60秒：当超过了核心线程之外的线程在空闲时间到达之后会被销毁
        executor.setKeepAliveSeconds(60);
        // 线程池名的前缀：设置好了之后可以方便我们定位处理任务所在的线程池
        executor.setThreadNamePrefix("taskExecutor-");
        // 缓冲队列满了之后的拒绝策略：由调用线程处理（一般是主线程）
        executor.setRejectedExecutionHandler(new ThreadPoolExecutor.DiscardPolicy());
        //用来设置线程池关闭的时候等待所有任务都完成再继续销毁其他的Bean
        executor.setWaitForTasksToCompleteOnShutdown(true);
        //该方法用来设置线程池中任务的等待时间，如果超过这个时候还没有销毁就强制销毁，以确保应用最后能够被关闭，而不是阻塞住
        executor.setAwaitTerminationSeconds(60);
        return executor;
    }
}
构造传入参数

@AllArgsConstructor
public class AsyncSendService implements Runnable{

    private SendMailServiceImpl sendMailService;

    private String reportNo;

    private Date currentDate;

    @Override
    public void run() {
        sendMailService.sendMailAndMsg(reportNo, currentDate);
    }
}
调用

@Resource(name = "taskExecutor")
ThreadPoolTaskExecutor taskExecutor;

@Autowired
SendMailServiceImpl sendMailService;

String rgtNo="xxxxx"
Date currentDate = 20xx-02-10;

AsyncSendService asyncSendService = new AsyncSendService(sendMailService,claimConfirmationVO.getRgtNo(),currentDate);
taskExecutor.execute(asyncSendService);