将对象列表转换为java中的Map

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

public class ObjectListToMapConverter {
    public static Map<Object, Object> convert(List<Object> objectList, String keyField, String valueField) {
        Map<Object, Object> map = new HashMap<>();
        
        for (Object obj : objectList) {
            Object key = getProperty(obj, keyField);
            Object value = getProperty(obj, valueField);
            map.put(key, value);
        }
        
        return map;
    }
    
    private static Object getProperty(Object obj, String fieldName) {
        // 根据字段名获取对象属性值的逻辑
        // 这里假设对象的字段是公共的，可以直接通过字段名获取
        // 如果对象的属性是私有的，可以使用反射机制来获取属性值
        
        // 示例中假设对象有一个名为fieldName的公共字段
        try {
            return obj.getClass().getField(fieldName).get(obj);
        } catch (NoSuchFieldException | IllegalAccessException e) {
            e.printStackTrace();
        }
        
        return null;
    }
}

import java.util.ArrayList;
import java.util.List;
import java.util.Map;

public class Main {
    public static void main(String[] args) {
        List<Person> personList = new ArrayList<>();
        personList.add(new Person("John", 25));
        personList.add(new Person("Jane", 30));
        personList.add(new Person("Tom", 35));

        Map<Object, Object> personMap = ObjectListToMapConverter.convert(personList, "name", "age");
        
        System.out.println(personMap); // 输出：{John=25, Jane=30, Tom=35}
    }
}

class Person {
    public String name;
    public int age;

    public Person(String name, int age) {
        this.name = name;
        this.age = age;
    }
}