如何使用Spring多线程

• • 为什么使用Spring多线程
  • 定义配置类
  • 在业务层使用多线程
  • 使用controller层进行测试
  • 测试结果

实际有两个原因，第一使用Spring比使用JDK原生的并发API更简单。第二我们的应用环境一般都会集成Spring，我们的Bean也都交给Spring来进行管理，那么使用Spring来实现多线程更加简单，更加优雅。（更多的可能是在环境中就要这么用！！）

package com.ysl.thread_demo.utils;

import org.springframework.aop.interceptor.AsyncUncaughtExceptionHandler;
import org.springframework.context.annotation.Configuration;
import org.springframework.scheduling.annotation.AsyncConfigurer;
import org.springframework.scheduling.annotation.EnableAsync;
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;

import java.util.concurrent.Executor;

@Configuration
@EnableAsync  // 启用异步任务
public class ThreadConfig implements AsyncConfigurer {

    @Override
    public Executor getAsyncExecutor() {
        ThreadPoolTaskExecutor taskExecutor = new ThreadPoolTaskExecutor();
        taskExecutor.setCorePoolSize(4);
        taskExecutor.setMaxPoolSize(20);
        taskExecutor.setQueueCapacity(30);
        taskExecutor.initialize();
        return taskExecutor;
    }

    @Override
    public AsyncUncaughtExceptionHandler getAsyncUncaughtExceptionHandler() {
        return null;
    }
}

package com.ysl.thread_demo.service.serviceImpl;

import com.ysl.thread_demo.service.TestThreadService;
import org.springframework.scheduling.annotation.Async;
import org.springframework.stereotype.Service;

@Service
public class TestThreadServiceImpl implements TestThreadService {

    @Override
    @Async	//使用@Async开启一个线程
    public void func01() throws Exception{
        for (int i = 0; i < 5; i++) {
            Thread.sleep(1000);
            System.out.println("func01运行 = " + i);
        }
    }

    @Override
    @Async
    public void func02() throws Exception {
        for (int i = 0; i < 5; i++) {
            Thread.sleep(1500);
            System.out.println("func02运行 = " + i);
        }
    }

    @Override
    @Async
    public void func03() throws Exception {
        for (int i = 0; i < 5; i++) {
            Thread.sleep(2000);
            System.out.println("func03运行 = " + i);
        }
    }

}

package com.ysl.thread_demo.controller;

import com.ysl.thread_demo.service.TestThreadService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class TestThreadController {

    @Autowired
    private TestThreadService testThreadService;

    @RequestMapping(value = "/testThread")
    public void testThread(){

        try {
            testThreadService.func01();
            testThreadService.func02();
            testThreadService.func03();
        }catch (Exception e){
            e.printStackTrace();
        }

    }

}