XXL-JOB任务分片

背景
假设有k个地市，每个地市有x个订单执行，总共kx个订单，而每个订单中又有一个字段体现出地市信息。

@Component
@Slf4j
public class AhOrdersXxlJob {
 
    //城市编号
    private static final List CITY_ID_LIST = Arrays.asList(550, 551, 552, 553, 554, 555, 556, 557, 558, 559, 561, 562, 563, 564, 566);
 
	//每个城市的任务数
    private static final int PER_LATN_TASK_NUM = 30; 
	
	// 任务数据库
    private static final Map> singleMachineMultiTasks; 
 
     static {
        singleMachineMultiTasks = new HashMap<>();
        CITY_ID_LIST.forEach(city -> {
            List tasks = new ArrayList<>(PER_LATN_TASK_NUM);
            IntStream.rangeClosed(1, PER_LATN_TASK_NUM).forEach(index -> {
                String orderInfo = city + "------NO." + index ;
                tasks.add(orderInfo);
            });