一个例子说明白 spring @Autowired @PostConstruct @Service 多线程

闲话省略

spring-config.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"
    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">

    <!-- 包路径扫描 -->
    <context:component-scan base-package="com.adao.spring.xmlconfig" />

    <!-- Spring线程池 -->
    <bean id="taskExecutor"
        class="org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor">
        <!-- 核心线程数 -->
        <property name="corePoolSize" value="5" />
        <!-- 线程池维护线程的最大数量 -->
        <property name="maxPoolSize" value="10" />
        <!-- 允许的空闲时间, 默认60秒 -->
        <property name="keepAliveSeconds" value="60" />
        <!-- 任务队列 -->
        <property name="queueCapacity" value="50" />
        <!-- 线程超过空闲时间限制，均会退出直到线程数量为0 -->
        <property name="allowCoreThreadTimeOut" value="true" />
        <property name="WaitForTasksToCompleteOnShutdown"
            value="true" />
        <!-- 对拒绝task的处理策略 -->
        <property name="rejectedExecutionHandler">
            <bean class="java.util.concurrent.ThreadPoolExecutor.DiscardOldestPolicy" />
        </property>
    </bean>

</beans>  

app

package com.adao.spring.xmlconfig;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class App {

    public static void main(String[] args) {
        ApplicationContext ctx = new ClassPathXmlApplicationContext("Spring-Config.xml");
    }
}

 

AdaoTask

package com.adao.spring.xmlconfig;

import javax.annotation.PostConstruct;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;
import org.springframework.stereotype.Component;
import org.springframework.stereotype.Service;

//@Component
@Service
public class AdaoTask {

    @Autowired
    private ThreadPoolTaskExecutor executor;

    @PostConstruct
    public void testAsycTask() {
        for (int i = 0; i < 10; i++) {
            executor.execute(new Runnable() {
                public void run() {
                    adaoTask();
                }
            });
        }
    }

private void adaoTask(){
        System.out.println( "Thread Name :" + Thread.currentThread().getName());
    }   
}

 

@Component 和@Service可以切换

执行结果：

 

 

perfect.

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