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)));
}

}