java8实现map遍历，map转list，list转map

1. 遍历map

    map.forEach((k, v) -> System.out.println("key:value = " + k + ":" + v));

2. mapתlist

    map.entrySet().stream().map(e -> new Person(e.getKey(),e.getValue())).collect(Collectors.toList());

3. listתmap

     Map<Integer, String> result1 = list.stream().collect(                 Collectors.toMap(Hosting::getId, Hosting::getName));

文章来源: https://blog.csdn.net/ayoungyeah/article/details/91491680