Java Lambda表达式遍历List<Map>集合获取特定属性值

要遍历一个List

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

public class Main {
    public static void main(String[] args) {
        List<Map<String, String>> list = new ArrayList<>();

        Map<String, String> map1 = new HashMap<>();
        map1.put("name", "John");
        map1.put("age", "25");
        list.add(map1);

        Map<String, String> map2 = new HashMap<>();
        map2.put("name", "Jane");
        map2.put("age", "30");
        list.add(map2);

        // 使用Lambda表达式和Stream API遍历List<Map>集合并取出"name"属性值
        List<String> names = list.stream()
                .map(map -> map.get("name"))
                .collect(Collectors.toList());

        System.out.println(names);
    }
}

运行以上代码会输出：[John, Jane]，表示成功取出了List