java中VO的使用解析

import io.swagger.annotations.ApiModelProperty;
public class User {
    @ApiModelProperty(value = "用户id")
    private String userId;
    @ApiModelProperty(value = "用户名称")
    private String name;
    
    @ApiModelProperty(value = "用户状态  1已认证，2 认证中，3未通过认证，7未提交认证")
    private Integer status;
    @ApiModelProperty(value = "头像地址")
    private String headPicFileName;
    @ApiModelProperty(value = "手机号")
    private String telephone;
    
    private Integer userLevel;
    @ApiModelProperty(value = "医生信息")
    private Doctor doctor;
    get/setXxx().... 
    @Override
    public boolean equals(Object o) {
        if (this == o) {
            return true;
        }
        if (o == null || getClass() != o.getClass()) {
            return false;
        }
        User user = (User) o;
        return userId != null ? userId.equals(user.userId) : user.userId == null;
    }
}

List<User> users = userServiceImpl.findUsersByIds(userIds);
//将User列表转换为UserVO列表:
List<CircleUserVO> circleUserVOs=BeanUtil.copyList(users,CircleUserVO.class);
//给UserVO添加角色属性
wrapRole(circleUserVOs,circleId);
wrapRole(List<CircleUserVO> circleUserVOs,Long circleId){
    //所有角色权限
    List<CircleUserVO> circleUserVOList = circleMemberRoleMapper.selectAllMemberRoleByCircleId(circleId);
    for (CircleUserVO circleUserVO:circleUserVOList){
        for (CircleUserVO circleUserVO1:circleUserVOs){
            if(circleUserVO.getUserId().equals(circleUserVO1.getUserId())){
                circleUserVO1.setRole(circleUserVO.getRole());
            }
        }
    }
}

package com.dachen.circle.model.vo;
import com.dachen.circle.model.inner.User;
import io.swagger.annotations.ApiModelProperty;
public class CircleUserVO extends User{
    @ApiModelProperty(value = "在该圈子的角色1：管理员 2：圈主（负责人）3：顾问 逗号拼接 多个角色 可同时为管理员，圈主，顾问")
    private String role;
    @ApiModelProperty(value = "0否 1是 永久免费")
    private Integer permanentFree;
    @ApiModelProperty(value = "1正常 2欠费")
    private Integer arrearageStatus;
    @ApiModelProperty(value = "过期时间 月数")
    private Integer expirationMonth;
    @ApiModelProperty(value = "医院名称")
    private String hospital;
    @ApiModelProperty(value = "科室")
    private String departments;
    @ApiModelProperty(value = "职称")
    private String title;
    @ApiModelProperty(value = "简介")
    private String introduction;
    @ApiModelProperty(value = "排序字母 A-Z Z1为#")
    private String letter;
   get/setXxx(); 
}

package com.dachen.util;
import org.springframework.beans.BeanUtils;
import java.util.ArrayList;
import java.util.List;
public class BeanUtil {
     public static <T> T copy(Object poObj,final Class <T>voClass)
     {
         T voObj =null;
         try {
             voObj = voClass.newInstance();
             BeanUtils.copyProperties(poObj, voObj);
             return voObj;
         } catch (InstantiationException | IllegalAccessException e) {
             e.printStackTrace();
         }
         return null;
     }
     public static <T> List <T> copyList(List <? extends Object> poList ,final Class <T>voClass){
        List<T> voList=new ArrayList<T>();
        T voObj =null;
        for(Object poObj:poList){
            try {
                voObj = voClass.newInstance();
                BeanUtils.copyProperties(poObj, voObj);
                voList.add(voObj);
            } catch (InstantiationException | IllegalAccessException e) {
                e.printStackTrace();
            }
            System.out.println(voObj);
        }
        return voList;
    }
}