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
@Service public 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
@Service public 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
@Service
public 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))); }
}