ExecutorService与ThreadPoolTaskExecutor

1.ExecutorService

private static ExecutorService exec = null;

public static ExecutorService getExecutorServiceInstance(){    if(exec == null){        exec = Executors.newCachedThreadPool();    }    return exec;}

public void threadNoticeOrMessageOrShortMessage (Integer type, Map<String, String> map, List<String> replaceParameter, List<String> list, Integer saveFlag){    exec = getExecutorServiceInstance();    NoticeOrMessageOrShortMessage noticeOrMessageOrShortMessage = new NoticeOrMessageOrShortMessage(getMessagePushInstance(), type, map, replaceParameter, list, saveFlag,            messagePushService, sendPushService, sendSmsService, sendMessageService);    exec.execute(noticeOrMessageOrShortMessage);}

2.ThreadPoolTaskExecutor

<bean id="taskExecutor" class="org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor">   <property name="corePoolSize" value="${task.core_pool_size}" />   <property name="maxPoolSize" value="${task.max_pool_size}" />   <property name="queueCapacity" value="${task.queue_capacity}" />   <property name="keepAliveSeconds" value="${task.keep_alive_seconds}" />　　<!-- 新增 -->

1. <!-- 线程池对拒绝任务(无线程可用)的处理策略 -->
2. <property name="rejectedExecutionHandler">
3. <bean class="java.util.concurrent.ThreadPoolExecutor$CallerRunsPolicy" />
4. </property>

</bean>

@Resource(name = "taskExecutor")private TaskExecutor taskExecutor;

private void addSendTask(final MimeMessage mimeMessage) {   try {      taskExecutor.execute(new Runnable() {         public void run() {            javaMailSender.send(mimeMessage);         }      });   } catch (Exception e) {      e.printStackTrace();   }}另外一种方式(未验证代码准确性) 

private static ThreadPoolTaskExecutor threadPoolTaskExecutor = null;

public static ThreadPoolTaskExecutor getThreadPoolTaskExecutor Instance(){

    if(threadPoolTaskExecutor == null){　　　　threadPoolTaskExecutor.setCorePoolSize(5);　　　　threadPoolTaskExecutor.setMaxPoolSize(50);　　　　threadPoolTaskExecutor.setQueueCapacity(1000);　　　　threadPoolTaskExecutor.setKeepAliveSeconds(60);

　　　　try {      　　taskExecutor.execute(new Runnable() {        　　 public void run() {            　　javaMailSender.send(mimeMessage);         　　}      　　});   　　} catch (Exception e) {            e.printStackTrace();   　　}

　　　}

    return exec;}

具体线程还是有些不懂