lambda表达式 list<Object> 转Map<String,String>

一、list 转 map

List<Student> list= new ArrayList<>();

1、第一种，List<Student> 转化Map<String,String>

Map<String,String> map = list.stream()
        .collect(Collectors.toMap(
                Student::getName, Student::getAge, (k1, k2) -> k2));

1、第一种，List<Student> 转化Map<String,Student>

Map<String,Student> map = list.stream()
        .collect(Collectors.toMap(
                Student::getName, student->student, (k1, k2) -> k2));