将List＜Map＜String，Object＞＞转为List＜Object＞

经常在开发中会需要将List<Map<String，Object>>转为List，Object也就是你自己对应的目标对象，因为经常要用，干脆就自己封装了一个，代码示例如下：

假设有一个类：Animal.java

public class Animal {private String name;private int age;public Animal(String name, int age) {this.name = name;this.age = age;}// 省略getter和setter方法@Overridepublic String toString() {return "Animal{" +"name='" + name + '\'' +", age=" + age +'}';}
}

将 List<Map<String, Object>> 转换为 List 类型。接收 Class 类型作为参数，并使用反射来创建指定类的对象：

import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationTargetException;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;public class MapListToObjectListConverter {public static <T> List<T> convertList(List<Map<String, Object>> listOfMaps, Class<T> clazz) {List<T> resultList = new ArrayList<>();for (Map<String, Object> map : listOfMaps) {try {Constructor<T> constructor = clazz.getConstructor(String.class, int.class);String name = (String) map.get("name");int age = (int) map.get("age");T instance = constructor.newInstance(name, age);resultList.add(instance);} catch (NoSuchMethodException | InstantiationException |IllegalAccessException | InvocationTargetException e) {e.printStackTrace();}}return resultList;}public static void main(String[] args) {// 假设这是从其他地方得到的List<Map<String, Object>>List<Map<String, Object>> listOfMaps = new ArrayList<>();Map<String, Object> map1 = Map.of("name", "Lion", "age", 5);Map<String, Object> map2 = Map.of("name", "Tiger", "age", 3);listOfMaps.add(map1);listOfMaps.add(map2);// 将List<Map<String, Object>>转换为List<Animal>List<Animal> animals = convertList(listOfMaps, Animal.class);// 输出转换后的Animal对象列表for (Animal animal : animals) {System.out.println(animal);}}
}