Java分组依据然后收集到自定义对象列表

import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

public class GroupingExample {
    public static void main(String[] args) {
        List<MyObject> list = ...; // 原始对象列表

        Map<String, List<MyCustomObject>> groupedMap = list.stream()
                .collect(Collectors.groupingBy(MyObject::getProperty,
                        Collectors.mapping(obj -> new MyCustomObject(obj.getProperty()), Collectors.toList())));

        // 打印分组结果
        groupedMap.forEach((key, value) -> {
            System.out.println("分组依据：" + key);
            System.out.println("自定义对象列表：" + value);
        });
    }
}

class MyObject {
    private String property;

    public MyObject(String property) {
        this.property = property;
    }

    public String getProperty() {
        return property;
    }
}

class MyCustomObject {
    private String property;

    public MyCustomObject(String property) {
        this.property = property;
    }

    @Override
    public String toString() {
        return "MyCustomObject{" +
                "property='" + property + '\'' +
                '}';
    }
}