有一些業務需求，需要是非同步進行的，不能影響當前執行緒的執行，在spring boot中則能通過註解和配置快速實現這個。

首先寫個非同步執行緒池配置類，如下：

@Configuration
@EnableAsync
public class AsyncConfig {

    @Value("${async.executor.thread.core_pool_size}")
    private int corePoolSize;

    @Value("${async.executor.thread.max_pool_size}")
    private int maxPoolSize;

    @Value
 
("${async.executor.thread.queue_capacity}")
    private int queueCapacity;

    private String threadNamePrefix = "AsyncExecutorThread-";

    @Bean(name = "asyncExecutor")
    public Executor asyncExecutor() {
        ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
        executor.setCorePoolSize(corePoolSize);
        executor.setMaxPoolSize(maxPoolSize);
        executor.setQueueCapacity(queueCapacity);
        executor.setThreadNamePrefix(threadNamePrefix);
        executor.setRejectedExecutionHandler(new
 
 ThreadPoolExecutor.CallerRunsPolicy());
        executor.initialize();
        return executor;
    }

}

然後將需要非同步執行的業務步驟寫成方法用@sync註解即可，如下：

@Component
public class AsyncExecutorCommon {
    @Async("asyncExecutor")
    public void loadPic(IfcTingshenJzml tsJzml,
            WsTingshenJzmlService wsTingshenJzmlService) {
        List<IfcTingshenJzml> tsJzmls = new
 
 ArrayList<IfcTingshenJzml>();
        tsJzmls.add(tsJzml);
        wsTingshenJzmlService.docService(tsJzmls);
    }
}

在業務程式碼裡直接呼叫這個方法即可，這個方法的執行就是非同步的。注意，非同步方法和呼叫非同步的方法不能寫在一個類裡，否則會報迴圈依賴異常，建議另建一個類，只用來放非同步方法。