spring定时任务.线程池,自定义多线程配置

定时任务及多线程配置xml

<?xml version="1.0" encoding="UTF-8"?><beans xmlns="http://www.springframework.org/schema/beans"       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"       xmlns:context="http://www.springframework.org/schema/context"       xmlns:mvc="http://www.springframework.org/schema/mvc"       xsi:schemaLocation="http://www.springframework.org/schema/beans       http://www.springframework.org/schema/beans/spring-beans-4.0.xsd       http://www.springframework.org/schema/context       http://www.springframework.org/schema/context/spring-context-4.0.xsd       http://www.springframework.org/schema/mvc       http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd       ">     <!--  job start-->        <!-- 定时 -->    <bean id="ruleBean"        class="org.springframework.scheduling.quartz.MethodInvokingJobDetailFactoryBean">        <property name="targetObject" ref="ruleService" />        <property name="targetMethod" value="updateRule" />              </bean>     <bean id="rule" class="org.springframework.scheduling.quartz.CronTriggerFactoryBean">        <property name="jobDetail" ref="ruleBean" />        <!-- 每天凌晨一点执行 -->        <property name="cronExpression" value="0 0 1 * * ?"/>    </bean>        <!-- 定时 end -->        <bean id="startQuertz" lazy-init="false" autowire="no"        class="org.springframework.scheduling.quartz.SchedulerFactoryBean">         <property name="jobDetails">          <list>            <ref bean="ruleBean" />          </list>        </property>        <property name="triggers">          <list>             <ref bean="rule" />          </list>        </property>        <!-- 启动时延期10秒开始任务 -->        <property name="startupDelay" value="10" />    </bean>        <!--  job end-->        <bean id="threadPoolTaskExecutor"      class="org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor">      <!-- 核心线程数，默认为1 -->      <property name="corePoolSize" value="1" />      <!-- 最大线程数，默认为Integer.MAX_VALUE -->      <property name="maxPoolSize" value="10" />      <!-- 队列最大长度，一般需要设置值>=notifyScheduledMainExecutor.maxNum；默认为Integer.MAX_VALUE          <property name="queueCapacity" value="1000" /> -->      <!-- 线程池维护线程所允许的空闲时间，默认为60s -->      <property name="keepAliveSeconds" value="300" />      <!-- 线程池对拒绝任务（无线程可用）的处理策略，目前只支持AbortPolicy、CallerRunsPolicy；默认为后者 -->      <property name="rejectedExecutionHandler">          <!-- AbortPolicy:直接抛出java.util.concurrent.RejectedExecutionException异常 -->          <!-- CallerRunsPolicy:主线程直接执行该任务，执行完之后尝试添加下一个任务到线程池中，可以有效降低向线程池内添加任务的速度 -->          <!-- DiscardOldestPolicy:抛弃旧的任务、暂不支持；会导致被丢弃的任务无法再次被执行 -->          <!-- DiscardPolicy:抛弃当前任务、暂不支持；会导致被丢弃的任务无法再次被执行 -->          <bean class="java.util.concurrent.ThreadPoolExecutor$CallerRunsPolicy" />      </property>    </bean>       <bean id="contextUtil" class="com.mythopoet.util.ContextUtil"></bean></beans>

定时任务JAVA类

RuleService.java

@Servicepublic class RuleService {    public void updateRule(){          System.out.println("定时任务启动");        }}

多线程配置

StartTaskThread.java

public class StartTaskThread implements Runnable {     private List<String> list;        public StartTaskThread(List<String> list) {       this.list= list;    }    @Override    public synchronized void run() {           System.out.println(list.size());    }}

修改定时任务类，分配数据，并发布到各个线程里。

RuleService.java

@Servicepublic class RuleService {    public void updateRule(){

        int nums = 5;//开启5线程        List<String> strList= new ArrayList<String>();        for (int i = 0; i < 2000; i++) {            strList.add("test"+i);        }        Map<Integer, List<String>> map = new HashMap<Integer, List<String>>();        for (int i = 0; i < nums; i++) {            List<String> list = new ArrayList<String>();            map.put(i, list);        }        int st = 0; //起点        int avg = strList.size()/nums; //平均值        int count =0;//记录值                for (int i = 0; i < nums; i++) {            if(i==nums-1){                for (int j = count; j <strList.size(); j++) {                    map.get(i).add(strList.get(j));                    count++;                }                new Thread(new StartTaskThread(map.get(i)).start();
                break;            }            for (int j = st; j <(st+avg); j++) {                map.get(i).add(strList.get(j));                count++;            }            st=st+avg;

            new Thread(new StartTaskThread(map.get(i)).start();

 } }

取线程配置工具类,如果线程内需要操作DAO 则需要主动获取spring注入的DAO类的Bean

ContextUtil.java

import org.springframework.beans.BeansException;import org.springframework.context.ApplicationContext;import org.springframework.context.ApplicationContextAware;public class ContextUtil implements ApplicationContextAware{    private static ApplicationContext context;    @Override    public void setApplicationContext(ApplicationContext applicationContext)            throws BeansException {        context = applicationContext;    }    public static ApplicationContext getContext(){        return context;    }    public static Object getBean(String beanName) {        return context.getBean(beanName);    }}

获取dao写法

RuleDAO ruleDAO =(RuleDAO) ContextUtil.getBean("ruleDAO");                

 

 

使用线程池

StartTaskThread2.java

public class StartTaskThread implements Runnable {     private String st;        public StartTaskThread(String st) {       this.st= st;    }    @Override    public void run() {           System.out.println(st);    }}

线程池

RuleService2.java

@Servicepublic class RuleService {    public void updateRule(){

        ThreadPoolTaskExecutor tpte =(ThreadPoolTaskExecutor)ContextUtil.getBean("threadPoolTaskExecutor");

        List<String> strList= new ArrayList<String>();        for (int i = 0; i < 2000; i++) {            strList.add("test"+i);        }
        

        for (int i = 0; i < strList.size(); i++) {            tpte.execute(new StartTaskThread2(strList.get(i)));        }

}