@Component 注释声明Spring的托管Bean
@Scope("prototype")? 注释说明为“多例”
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package com.test.thread;
import org.springframework.context.annotation.Scope;
import org.springframework.stereotype.Component;
@Component
@Scope("prototype")
public class PrintTask implements Runnable {
String name;
public void setName(String name) {
this.name = name;
}
@Override
public void run(){
System.out.println(name + " is running.");
try{
Thread.sleep(5000);
}catch(InterruptedException e){
e.printStackTrace();
}
System.out.println(name + " is running again.");
}
}
?
package com.test.config;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;
@Configuration
// 表示所扫描所包含的@Bean
@ComponentScan(basePackages="com.test.thread")
public class AppConfig {
@Bean
public ThreadPoolTaskExecutor taskExecutor(){
ThreadPoolTaskExecutor pool = new ThreadPoolTaskExecutor();
pool.setCorePoolSize(5); //线程池活跃的线程数
pool.setMaxPoolSize(10); //线程池最大活跃的线程数
pool.setQueueCapacity(25); // 队列的最大容量
pool.setWaitForTasksToCompleteOnShutdown(true);
return pool;
}
}
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package com.test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;
import com.chszs.config.AppConfig;
import com.chszs.thread.PrintTask;
public class App {
public static void main(String[] args) {
ApplicationContext ctx =
new AnnotationConfigApplicationContext(AppConfig.class);
ThreadPoolTaskExecutor taskExecutor =
(ThreadPoolTaskExecutor)ctx.getBean("taskExecutor");
PrintTask2 printTask1 = (PrintTask2)ctx.getBean("printTask");
printTask1.setName("Thread 1");
taskExecutor.execute(printTask1);
PrintTask2 printTask2 = (PrintTask2)ctx.getBean("printTask");
printTask2.setName("Thread 2");
taskExecutor.execute(printTask2);
PrintTask2 printTask3 = (PrintTask2)ctx.getBean("printTask");
printTask3.setName("Thread 3");
taskExecutor.execute(printTask3);
for(;;){
int count = taskExecutor.getActiveCount();
System.out.println("Active Threads : " + count);
try{
Thread.sleep(1000);
}catch(InterruptedException e){
e.printStackTrace();
}
if(count==0){
taskExecutor.shutdown();
break;
}
}
}
}
?备注：如PrintTask类中有操作dao,service中的数据库@Autowired找不到类，那就要注意@ComponentScan(basePackages="com.test.thread")是否有问题了~应包含全部@Bean包的最底级别。
package com.chszs.thread;
public class PrintTask implements Runnable{
String name;
public PrintTask(String name){
this.name = name;
}
@Override
public void run() {
System.out.println(name + " is running.");
try{
Thread.sleep(5000);
}catch(InterruptedException e){
e.printStackTrace();
}
System.out.println(name + " is running again.");
}
}
?
<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"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.1.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.1.xsd">
<bean id="taskExecutor"
class="org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor">
<property name="corePoolSize" value="5" />
<property name="maxPoolSize" value="10" />
<property name="WaitForTasksToCompleteOnShutdown" value="true" />
</bean>
</beans>
?
package com.chszs;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;
import com.chszs.thread.PrintTask;
public class App1 {
public static void main(String[] args) {
ApplicationContext ctx =
new ClassPathXmlApplicationContext("resources/Spring-Config.xml");
ThreadPoolTaskExecutor taskExecutor =
(ThreadPoolTaskExecutor)ctx.getBean("taskExecutor");
taskExecutor.execute(new PrintTask("Thread 1"));
taskExecutor.execute(new PrintTask("Thread 2"));
taskExecutor.execute(new PrintTask("Thread 3"));
taskExecutor.execute(new PrintTask("Thread 4"));
taskExecutor.execute(new PrintTask("Thread 5"));
// 检查活动的线程，如果活动线程数为0则关闭线程池
for(;;){
int count = taskExecutor.getActiveCount();
System.out.println("Active Threads : " + count);
try{
Thread.sleep(1000);
}catch(InterruptedException e){
e.printStackTrace();
}
if(count==0){
taskExecutor.shutdown();
break;
}
}
}
}
通过继承Thread创建一个简单的Java线程，然后使用@Component让Spring容器管理此线程，Bean的范围必须是prototype，因此每个请求都会返回一个新实例，运行每个单独的线程。
package com.chszs.thread;
import org.springframework.stereotype.Component;
import org.springframework.context.annotation.Scope;
@Component
@Scope("prototype")
public class PrintThread extends Thread{
@Override
public void run(){
System.out.println(getName() + " is running.");
try{
Thread.sleep(5000);
}catch(InterruptedException e){
e.printStackTrace();
}
System.out.println(getName() + " is running again.");
}
}
?
package com.chszs;
import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import com.chszs.config.AppConfig;
import com.chszs.thread.PrintThread;
public class App {
public static void main(String[] args){
ApplicationContext ctx =
new AnnotationConfigApplicationContext(AppConfig.class);
PrintThread printThread1 = (PrintThread)ctx.getBean("printThread");
printThread1.setName("Thread 1");
PrintThread printThread2 = (PrintThread)ctx.getBean("printThread");
printThread2.setName("Thread 2");
PrintThread printThread3 = (PrintThread)ctx.getBean("printThread");
printThread3.setName("Thread 3");
PrintThread printThread4 = (PrintThread)ctx.getBean("printThread");
printThread4.setName("Thread 4");
PrintThread printThread5 = (PrintThread)ctx.getBean("printThread");
printThread5.setName("Thread 5");
printThread1.start();
printThread2.start();
printThread3.start();
printThread4.start();
printThread5.start();
}
}
?
package com.chszs.config;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
@Configuration
@ComponentScan(basePackages="com.chszs.thread")
public class AppConfig {
}
?锁依赖的jar
org.springframework.aop-3.1.3.RELEASE.jar
org.springframework.asm-3.1.3.RELEASE.jar
org.springframework.beans-3.1.3.RELEASE.jar
org.springframework.context-3.1.3.RELEASE.jar
org.springframework.core-3.1.3.RELEASE.jar
org.springframework.expression-3.1.3.RELEASE.jar
commons-logging.jar
aopalliance-1.0.jar
asm-3.3.1.jar
cglib-2.2.2.jar
另外附上线程池属性，作用等你发掘，欢迎拍砖~
protected edu.emory.mathcs.backport.java.util.concurrent.BlockingQueue createQueue(int queueCapacity) //Create the BlockingQueue to use for the ThreadPoolExecutor. void destroy() //Calls shutdown when the BeanFactory destroys the task executor instance. void execute(Runnable task) //Implementation of both the JSR-166 backport Executor interface and the Spring TaskExecutor interface, delegating to the ThreadPoolExecutor instance. int getActiveCount() //Return the number of currently active threads. int getCorePoolSize() //Return the ThreadPoolExecutor‘s core pool size. int getKeepAliveSeconds() //Return the ThreadPoolExecutor‘s keep-alive seconds. int getMaxPoolSize() //Return the ThreadPoolExecutor‘s maximum pool size. int getPoolSize() //Return the current pool size. edu.emory.mathcs.backport.java.util.concurrent.ThreadPoolExecutor getThreadPoolExecutor() //Return the underlying ThreadPoolExecutor for native access. void initialize() //Creates the BlockingQueue and the ThreadPoolExecutor. boolean prefersShortLivedTasks() //This task executor prefers short-lived work units. void setAllowCoreThreadTimeOut(boolean allowCoreThreadTimeOut) //Specify whether to allow core threads to time out. void setBeanName(String name) //Set the name of the bean in the bean factory that created this bean. void setCorePoolSize(int corePoolSize) //Set the ThreadPoolExecutor‘s core pool size. void setKeepAliveSeconds(int keepAliveSeconds) //Set the ThreadPoolExecutor‘s keep-alive seconds. void setMaxPoolSize(int maxPoolSize) //Set the ThreadPoolExecutor‘s maximum pool size. void setQueueCapacity(int queueCapacity) //Set the capacity for the ThreadPoolExecutor‘s BlockingQueue. void setRejectedExecutionHandler(edu.emory.mathcs.backport.java.util.concurrent.RejectedExecutionHandler rejectedExecutionHandler) //Set the RejectedExecutionHandler to use for the ThreadPoolExecutor. void setThreadFactory(edu.emory.mathcs.backport.java.util.concurrent.ThreadFactory threadFactory) //Set the ThreadFactory to use for the ThreadPoolExecutor‘s thread pool. void setThreadNamePrefix(String threadNamePrefix) //Specify the prefix to use for the names of newly created threads. void setWaitForTasksToCompleteOnShutdown(boolean waitForJobsToCompleteOnShutdown) //Set whether to wait for scheduled tasks to complete on shutdown. void shutdown() //Perform a shutdown on the ThreadPoolExecutor.?
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原文：http://zliguo.iteye.com/blog/2251348