大数据在物流领域的应用有哪些？请举例说明。

import java.util.HashMap;
import java.util.Map;

public class IntelligentFreightManagementSystem {

    private Map<String, Integer> shipmentData;
    private Map<String, String> shipmentStatus;

    public IntelligentFreightManagementSystem() {
        shipmentData = new HashMap<>();
        shipmentStatus = new HashMap<>();
    }

    /**
     * 添加货运数据
     * @param shipmentId 货运ID
     * @param weight 货物重量
     */
    public void addShipmentData(String shipmentId, int weight) {
        shipmentData.put(shipmentId, weight);
        shipmentStatus.put(shipmentId, "In transit");
    }

    /**
     * 更新货运状态
     * @param shipmentId 货运ID
     * @param status 货运状态
     */
    public void updateShipmentStatus(String shipmentId, String status) {
        shipmentStatus.put(shipmentId, status);
    }

    /**
     * 获取货运状态
     * @param shipmentId 货运ID
     * @return 货运状态
     */
    public String getShipmentStatus(String shipmentId) {
        return shipmentStatus.get(shipmentId);
    }

    public static void main(String[] args) {
        IntelligentFreightManagementSystem managementSystem = new IntelligentFreightManagementSystem();
        managementSystem.addShipmentData("shipment1", 100);
        managementSystem.addShipmentData("shipment2", 200);
        managementSystem.updateShipmentStatus("shipment1", "Delivered");
        String status1 = managementSystem.getShipmentStatus("shipment1");
        String status2 = managementSystem.getShipmentStatus("shipment2");
        System.out.println("Shipment1 status: " + status1);
        System.out.println("Shipment2 status: " + status2);
    }
}