创建实体类

@Data
public class Shopping {private String name;private List<String> children;
}

测试

 public static void main(String[] args) {ArrayList<Shopping> shoppings = new ArrayList<>();Shopping shopping = new Shopping();shopping.setName("内存");ArrayList<String> strings = new ArrayList<>();strings.add("12G");strings.add("16G");shopping.setChildren(strings);Shopping shopping1 = new Shopping();shopping1.setName("存储");ArrayList<String> strings1 = new ArrayList<>();strings1.add("256G");strings1.add("512G");shopping1.setChildren(strings1);Shopping shopping2 = new Shopping();shopping2.setName("颜色");ArrayList<String> strings2 = new ArrayList<>();strings2.add("黑色");strings2.add("白色");shopping2.setChildren(strings2);shoppings.add(shopping);shoppings.add(shopping1);shoppings.add(shopping2);List<List<String>> combinations = generateCombinations(shoppings);for (List<String> combination : combinations) {System.out.println(combination);}}public static List<List<String>> generateCombinations(List<Shopping> shoppings) {List<List<String>> result = new ArrayList<>();generateCombinationsRecursive(shoppings, 0, new ArrayList<>(), result);return result;}private static void generateCombinationsRecursive(List<Shopping> shoppings, int index, List<String> current, List<List<String>> result) {if (index == shoppings.size()) {result.add(new ArrayList<>(current));return;}Shopping shopping = shoppings.get(index);for (String option : shopping.getChildren()) {current.add(shopping.getName() + ": " + option);generateCombinationsRecursive(shoppings, index + 1, current, result);current.remove(current.size() - 1);}}

效果