Spring之十三 线程池

线程池 ThreadPoolTaskExecutor

1.applicationContext.xml中配置

    <bean id="taskExecutor" class="org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor">        <!--线程池活跃的线程数-->        <property name="corePoolSize" value="5" />        <!--线程池最大活跃的线程数-->        <property name="maxPoolSize" value="150" />        <!--任务队列的最大容量-->        <property name="queueCapacity" value="5000" />        <!--线程池维护线程所允许的空闲时间-->        <property name="keepAliveSeconds" value="60" />        <!-- 线程池对无线程可用的处理策略-->        <property name="rejectedExecutionHandler">            <bean class="java.util.concurrent.ThreadPoolExecutor$CallerRunsPolicy" />        </property>    </bean>

2.使用

TaskExecutor taskExecutor = (TaskExecutor)SpringContextUtil.getBean("taskExecutor");taskExecutor.execute(new personRunner());

守护线程

1.实现ThreadFactory接口

public class HelloThreadFactory implements ThreadFactory{    private final static HelloThreadFactory instance = new HelloThreadFactory();    private final ThreadGroup group;    /**     * 构造函数     */    public HelloThreadFactory() {        this(null);    }        public HelloThreadFactory(ThreadGroup group) {        if(group == null){            SecurityManager s = System.getSecurityManager();            this.group = (s != null) ? s.getThreadGroup() : Thread.currentThread().getThreadGroup();        }else{            this.group = group;        }    }        public static HelloThreadFactory getInstance(){        return instance;    }        @Override    public Thread newThread(Runnable r) {        Thread t = new Thread(group, r);        return t;    }        //启动守护线程    public void startDaemonThread(Thread t, String threadName){        if(null == t){            return;        }        t.setDaemon(true);        t.setName(threadName);        t.start();    }}

2.使用线程工厂创建线程

@Componentpublic class HelloInit {    public void init(){        HelloThreadFactory threadFactory = HelloThreadFactory.getInstance();        Thread testThread = threadFactory.newThread(new TestThread());        threadFactory.startDaemonThread(testThread, "test");    }}

3.在Spring的监听文件中初始化

public class SystemListener extends ContextLoaderListener{        @Override    public void contextInitialized(ServletContextEvent event) {        //启动spring环境        super.contextInitialized(event);         HelloInit helloInit = (HelloInit)SpringContextUtil.getBean(HelloInit.class);        helloInit.init();    }}

注：若不使用线程工厂，需要new Thread

Thread thread = new Thread(new TestThread());thread.setDaemon(true);thread.start();