list如何将自己实体的字段值赋给另外一个List实体中的相同字段

import org.apache.commons.beanutils.BeanUtils;
foreach(a){
  foreach(b){
//a复制给b
BeanUtils.copyProperties(a, b);
}
}

List<Todo> list = new ArrayList<>();
list.add(new Todo(1,1,"hh","ss"，LocalDateTime.now()));
list.add(new Todo(2,2,"hh","ss"，LocalDateTime.now()));   
list.add(new Todo(3,3,"hh","ss"，LocalDateTime.now()));
 
List<TodoDto> todoDtos = new ArrayList<>();
        todoDtos = list.stream().map(
                todo ->new TodoDto(todo.getUserId(),todo.getTitle(),todo.getContent())
        ).collect(Collectors.toList());
           //  或者
        todoDtos = list.stream().map(
            todo->{
                TodoDto to = new TodoDto();
                BeanUtils.copyProperties(todo,to);
                return to;
            }
        ).collect(Collectors.toList());
 
 
 
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@Data
@AllArgsConstructor
@NoArgsConstructor
public class TodoDto {
    private int userId;
    private String title;
    private String content;
 
}
 
 
-----------------------------------------
@Data
@AllArgsConstructor
@NoArgsConstructor
public class Todo {
    private int id;
    private int userId;
    private String title;
    private String content;
    private LocalDateTime createTime;
}