springboot异步多线程发邮件

@Configuration
public class ThreadPoolConfig {
    @Bean("AsyncTaskExecutor")
    public AsyncTaskExecutor taskExecutor() {
        ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
        // 设置核心线程数
        executor.setCorePoolSize(8);
        // 设置最大线程数
        executor.setMaxPoolSize(16);
        // 设置队列容量
        executor.setQueueCapacity(32);
        // 设置线程活跃时间（秒）
        executor.setKeepAliveSeconds(60);
        // 设置默认线程名称
        executor.setThreadNamePrefix("task-");
        // 设置拒绝策略
        executor.setRejectedExecutionHandler(new ThreadPoolExecutor.CallerRunsPolicy());
        executor.initialize();
        return executor;
    }
}