多线程事务怎么回滚？

项目中用到了多线程去批量处理一些数据，当时想当然认为只要方法上加上@Transactional注解就好了，实际并未达到想要的处理效果。特此去学习了下关于多线程事务回滚相关方案，参考了网上其他资料，这里整理并记录下学习历程。
站在巨人的肩膀上，我们可以看的更远！

一、准备相关基础方法

这里以多线程、分批次插入数据库employee表为例子进行演示。

1.线程池配置

/**
 * 线程池配置
 */
@Component
public class ExecutorConfig {
   
   
    private static int maxPoolSize = Runtime.getRuntime().availableProcessors();
    private volatile static ExecutorService executorService;

    public static ExecutorService getThreadPool() {
   
   
        if (executorService == null){
   
   
            synchronized (ExecutorConfig.class){
   
   
                if (executorService == null){
   
   
                    executorService =  newThreadPool();
                }
            }
        }
        return executorService;
    }

    private static ExecutorService newThreadPool(){
   
   
        int queueSize = 1000;
        int corePool = Math.min(10, maxPoolSize);
        return new ThreadPoolExecutor(corePool, maxPoolSize, 10000L, TimeUnit.MILLISECONDS,
                new LinkedBlockingQueue<>(queueSize),new ThreadPoolExecutor.AbortPolicy());
    }
    private ExecutorConfig(){
   
   }
}

2.list切分工具类

/**
 * list切分工具类
 */
public class ListUtil {
   
   
    /**
     * 平均拆分list
     *
     * @param source
     * @param n
     * @param <T>
     * @return
     */
    public static <T> List<List<T>> AverageList(List<T> source, int n) {
   
   
        List<List<T>> result = new ArrayList<>();
        int remaider = source.size() % n;
        int number = source.size() / n;
        //偏移量
        int offset = 0;
        for (int i = 0; i < n; i++) {
   
   
            List<T> value;
            if (remaider > 0) {
   
   
                value = source.subList(i * number + offset, (i + 1) * number + offset + 1);
                remaider--;
                offset++;
            } else {
   
   
                value = source.subList(i * number + offset, (i + 1) * number + offset);
            }
            result.add(value);
        }
        return result;
    }
}

3.SqlSession工具类

/**
 * SqlSession工具类
 */
@Component
public class SqlContext {
   
   
    @Resource