你有很多选择。其中一个可以在您的应用程序中创建两个静态构造函数 ConbinationModel 类，如：

public static ConbinationModel fromOneModel(OneModel model) {
    final ConbinationModel conbinationModel = new ConbinationModel();
    conbinationModel.setField(model.getField());
    // set other fields
    return conbinationModel;
}

public static ConbinationModel fromTwoModel(TwoModel model) {
    final ConbinationModel conbinationModel = new ConbinationModel();
    conbinationModel.setField(model.getField());
    // set other fields
    return conbinationModel;
}

然后你可以浏览你的列表：

List<ConbinationModel> fromListOne = listOne.stream()
    .map(ConbinationModel::fromOneModel)
    .collect(Collectors.toList());

List<ConbinationModel> fromListTwo = listTwo.stream()
    .map(ConbinationModel::fromTwoModel)
    .collect(Collectors.toList());