Spring Boot配置多线程（创建线程池、创建线程）-蒲公英云

1 Maven依赖

<dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
        </dependency>

2 AsyncConfig

多线程配置类。

package com.config;
import lombok.extern.slf4j.Slf4j;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.aop.interceptor.AsyncUncaughtExceptionHandler;
import org.springframework.aop.interceptor.SimpleAsyncUncaughtExceptionHandler;
import org.springframework.beans.factory.DisposableBean;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.boot.autoconfigure.task.TaskExecutionProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.task.AsyncTaskExecutor;
import org.springframework.scheduling.annotation.AsyncConfigurer;
import org.springframework.scheduling.annotation.EnableAsync;
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;
import java.util.concurrent.Callable;
import java.util.concurrent.Executor;
import java.util.concurrent.Future;
/**
 * 多线程配置类
 */
@Configuration
@EnableAsync
@Slf4j
public class AsyncConfig implements AsyncConfigurer {
    private final TaskExecutionProperties taskExecutionProperties;
    public AsyncConfig(TaskExecutionProperties taskExecutionProperties) {
        this.taskExecutionProperties = taskExecutionProperties;
    }
    /**
     * 创建线程池
     *
     * @return
     */
    @Override
    @Bean(name = "taskExecutor")
    public Executor getAsyncExecutor() {
        log.debug("Creating Async Task Executor");
        ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
        //设置核心线程数
        executor.setCorePoolSize(taskExecutionProperties.getPool().getCoreSize());
        //设置最大线程数
        executor.setMaxPoolSize(taskExecutionProperties.getPool().getMaxSize());
        //线程池所使用的缓冲队列
        executor.setQueueCapacity(taskExecutionProperties.getPool().getQueueCapacity());
        //  线程名称前缀
        executor.setThreadNamePrefix(taskExecutionProperties.getThreadNamePrefix());
        return new ExceptionHandlingAsyncTaskExecutor(executor);
    }
    @Override
    public AsyncUncaughtExceptionHandler getAsyncUncaughtExceptionHandler() {
        return new SimpleAsyncUncaughtExceptionHandler();
    }
    public static class ExceptionHandlingAsyncTaskExecutor implements AsyncTaskExecutor,
            InitializingBean, DisposableBean {
        static final String EXCEPTION_MESSAGE = "Caught async exception";
        private final Logger log = LoggerFactory.getLogger(ExceptionHandlingAsyncTaskExecutor.class);
        private final AsyncTaskExecutor executor;
        /**
         * <p>Constructor for ExceptionHandlingAsyncTaskExecutor.</p>
         *
         * @param executor a {@link AsyncTaskExecutor} object.
         */
        public ExceptionHandlingAsyncTaskExecutor(AsyncTaskExecutor executor) {
            this.executor = executor;
        }
        /**
         * {@inheritDoc}
         */
        @Override
        public void execute(Runnable task) {
            executor.execute(createWrappedRunnable(task));
        }
        /**
         * {@inheritDoc}
         */
        @Override
        public void execute(Runnable task, long startTimeout) {
            executor.execute(createWrappedRunnable(task), startTimeout);
        }
        private <T> Callable<T> createCallable(final Callable<T> task) {
            return () -> {
                try {
                    return task.call();
                } catch (Exception e) {
                    handle(e);
                    throw e;
                }
            };
        }
        private Runnable createWrappedRunnable(final Runnable task) {
            return () -> {
                try {
                    task.run();
                } catch (Exception e) {
                    handle(e);
                }
            };
        }
        /**
         * <p>handle.</p>
         *
         * @param e a {@link Exception} object.
         */
        protected void handle(Exception e) {
            log.error(EXCEPTION_MESSAGE, e);
        }
        /**
         * {@inheritDoc}
         */
        @Override
        public Future<?> submit(Runnable task) {
            return executor.submit(createWrappedRunnable(task));
        }
        /**
         * {@inheritDoc}
         */
        @Override
        public <T> Future<T> submit(Callable<T> task) {
            return executor.submit(createCallable(task));
        }
        /**
         * {@inheritDoc}
         */
        @Override
        public void destroy() throws Exception {
            if (executor instanceof DisposableBean) {
                DisposableBean bean = (DisposableBean) executor;
                bean.destroy();
            }
        }
        /**
         * {@inheritDoc}
         */
        @Override
        public void afterPropertiesSet() throws Exception {
            if (executor instanceof InitializingBean) {
                InitializingBean bean = (InitializingBean) executor;
                bean.afterPropertiesSet();
            }
        }
    }
}

3 AsyncTestService

声明异步方法。

package com.service;
import org.springframework.scheduling.annotation.Async;
import org.springframework.stereotype.Service;
@Service
public class AsyncTestService {
    @Async
    public void test(int num) {
        System.out.print("\tnum=" + num);
    }
}

4 调试代码

package com.controller;
import com.service.AsyncTestService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;
@RestController
public class AsyncController {
    @Autowired
    private AsyncTestService asyncTestService;
    /**
     * 测试多线程
     */
    @GetMapping("/testAsync")
    public void testAsync() {
        for (int i = 0; i < 100; i++) {
            System.out.print("\ti=" + i);
        }
        for (int j = 0; j < 100; j++) {
            asyncTestService.test(j);
        }
        System.out.print("i=" + 1111);
    }
}

5 调试结果

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注：

有关调用异步方法创建线程的方式请查看以下博客。

Java 调用@Async异步方法创建线程2种方式（调用外部的异步方法，调用内部的异步方法）_旭东怪的博客-CSDN博客1 Maven依赖 org.projectlombok lombok true <!—hutool工 favicon32.ico https://blog.csdn.net/qq\_38974638/article/details/120348519