将一个字符串List转为对象List

实体类

@Data
@NoArgsConstructor
@AllArgsConstructor
public class User {

    private Long id;

    private String name;

    private Integer age;

    public User(String name) {
        this.name = name;
    }
    
    public User(String name, Integer age) {
        this.name = name;
        this.age = age;
    }
}

代码验证

public class AnswerApp {

    public static void main(String[] args) {
        List<String> names = Lists.newArrayList("Answer", "AnswerAIL", "AI");
        
        // User::new 使用的构造方法是 public User(String name) {}
        List<User> users = names.stream().map(User::new).collect(Collectors.toList());
        users.forEach(element -> element.setAge(25));

        System.out.println(JSON.toJSONString(users));

        System.out.println("--------------------");

        List<User> userList = names.stream().map(e -> new User(e, 25)).collect(Collectors.toList());
        System.out.println(JSON.toJSONString(userList));
    }
    
}

程序输出

[{"age":25,"name":"Answer"},{"age":25,"name":"AnswerAIL"},{"age":25,"name":"AI"}]
--------------------
[{"age":25,"name":"Answer"},{"age":25,"name":"AnswerAIL"},{"age":25,"name":"AI"}]