比较两个 Pojo 列表的变化

Question

我有两个 Pojo 类 DriverPrimary、DriverSecondary

我正在比较主要驱动程序和次要驱动程序，如果有任何变化，我需要找出来

你能告诉我这是怎么做到的吗？

DriverPrimary.java

public class DriverPrimary implements Serializable {

    private static final long serialVersionUID = 1L;

    private String DriverId;
    private String role;

    
}

DriverSecondary.java

public class DriverSecondary{

    private String driverSecondaryDriverType;
    private String driverSecondaryDriverId;

}

   List<DriverPrimary> driverPrimary = new ArrayList<DriverPrimary>();
   List<DriverSecondary> driverSecondary = new ArrayList<DriverSecondary>();

driverPrimary=DataEBO.getDriverPrimary();// from datasource which is not empty and has values
driverSecondary=DataDTO.getDriverSecondary();// from datasource which is not empty and has values

所以如何比较以上两个列表，虽然字段名称不同但两者的值相似

已编辑：删除了 Equals 和 hashcode，它可以与具有相同结构的 class 一起使用。 Edit2：修改代码以便更好地理解

Answer 1

其中一个列表应重新映射到另一种类型的类，以使列表的内容“具有可比性”：

// from datasource which is not empty and has values
List<DriverPrimary> primary = DataEBO.getDriverPrimary();
List<DriverPrimary> secondary = DataDTO.getDriverSecondary() // List<DriverSecondary>
        .stream()
        .map(sec -> new DriverPrimary(
            sec.getDriverSecondaryDriverId(),  // id  -> id
            sec.getDriverSecondaryDriverType() // type -> role
        ))
        .collect(Collectors.toList());  // List<DriverPrimary>

然后，假设 equals 和 hashCode 在 DriverPrimary 中正确实现，可以使用例如 List::removeAll（或者只是List::equals).

List<DriverPrimary> diff1 = new ArrayList<>(primary);
diff1.removeAll(secondary); // items in primary missing in secondary

List<DriverPrimary> diff2 = new ArrayList<>(secondary);
diff2.removeAll(primary); // items in secondary missing in primary

比较两个 Pojo 列表的变化

Comparing Two Pojo List for changes

java

list

arraylist

pojo