【探花交友】圈子互动

博主： Fivk
发布时间：2023 年 01 月 11 日
1330 次浏览
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24018字数
分类：项目实战

## 课程说明

- 圈子动态查询
- 圈子实现评论
- 圈子实现点赞、喜欢功能
- 圈子实现评论

## 1、动态查询

我的动态：查询个人发布的动态列表（分页查询），和之前实现的好友动态，推荐动态实现逻辑是一致。

### 1.1、查询好友动态

查询好友动态与查询推荐动态显示的结构是一样的，只是其查询数据源不同

#### 1.1.1、接口文档

API接口文档：http://192.168.136.160:3000/project/19/interface/api/142

#### 1.1.2、代码步骤

* Controller层接受请求参数
* Service数据封装

* 调用API查询好友动态详情数据
  * 调用API查询动态发布人详情
  * 构造VO对象
* API层根据用户ID查询好友发布动态详情

* 查询好友时间线表
  * 查询动态详情

#### 1.1.3、代码实现

##### MovementController

```java

/**
     * 查询好友动态
     */
    @GetMapping
    public ResponseEntity movements(@RequestParam(defaultValue = "1") Integer page,
                                    @RequestParam(defaultValue = "10") Integer pagesize) {
        PageResult pr = movementService.findFriendMovements(page,pagesize);
        return ResponseEntity.ok(pr);
    }
```

##### MovementService

```java
//好友动态
public PageResult findFriendMovements(Integer page, Integer pagesize) {
    //1、获取当前用户id
    Long userId = UserHolder.getUserId();
    //2、查询数据列表
    List<Movement> items = movementApi.findFriendMovements(userId,page,pagesize);
    //3、非空判断
    if(CollUtil.isEmpty(items)) {
        return new PageResult();
    }
    //4、获取好友用户id
    List<Long> userIds = CollUtil.getFieldValues(items, "userId", Long.class);
    //5、循环数据列表
    Map<Long, UserInfo> userMaps = userInfoApi.findByIds(userIds, null);
    List<MovementsVo> vos = new ArrayList<>();
    for (Movement item : items) {
        //5、一个Movement构建一个Vo对象
        UserInfo userInfo = userMaps.get(item.getUserId());
        MovementsVo vo = MovementsVo.init(userInfo, item);
        vos.add(vo);
    }
    //6、构建返回值
    return new PageResult(page,pagesize,0L,vos);
}
```

##### movementApi

```java
@Override
public List<Movement> findFriendMovements(Long friendId, Integer page, Integer pagesize) {
    //1、查询好友时间线表
    Query query = Query.query(Criteria.where("friendId").in(friendId))
            .skip((page - 1)*pagesize).limit(pagesize)
            .with(Sort.by(Sort.Order.desc("created")));
    List<MovementTimeLine> lines = mongoTemplate.find(query, MovementTimeLine.class);
    //2、提取动态id集合
    List<ObjectId> movementIds = CollUtil.getFieldValues(lines, "movementId", ObjectId.class);
    //3、根据动态id查询动态详情
    Query movementQuery = Query.query(Criteria.where("id").in(movementIds));
    return mongoTemplate.find(movementQuery, Movement.class);
}
```

### 1.2、查询推荐动态

推荐动态是通过推荐系统计算出的结果，现在我们只需要实现查询即可，推荐系统在后面的课程中完成。

推荐系统计算完成后，会将结果数据写入到Redis中，数据如下：

~~~shell
192.168.31.81:6379> get MOVEMENTS_RECOMMEND_1
"2562,3639,2063,3448,2128,2597,2893,2333,3330,2642,2541,3002,3561,3649,2384,2504,3397,2843,2341,2249"
~~~

可以看到，在Redis中的数据是有多个发布id组成（pid）由逗号分隔。所以实现中需要自己对这些数据做分页处理。

#### 1.2.1、接口文档

API接口文档：http://192.168.136.160:3000/project/19/interface/api/145

#### 1.2.2、代码步骤

* Controller层接受请求参数
* Service数据封装

* 从redis获取当前用户的推荐PID列表
  * 如果不存在，调用API随机获取10条动态数据
  * 如果存在，调用API根据PID列表查询动态数据
  * 构造VO对象
* API层编写方法

* 随机获取
  * 根据pid列表查询

#### 1.2.3、代码实现

##### Constants

```java
package com.tanhua.commons.utils;

//常量定义
public class Constants {

//手机APP短信验证码CHECK_CODE_
    public static final String SMS_CODE = "CHECK_CODE_";

//推荐动态
	public static final String MOVEMENTS_RECOMMEND = "MOVEMENTS_RECOMMEND_";

//推荐视频
    public static final String VIDEOS_RECOMMEND = "VIDEOS_RECOMMEND_";

//圈子互动KEY
	public static final String MOVEMENTS_INTERACT_KEY = "MOVEMENTS_INTERACT_";

//动态点赞用户HashKey
    public static final String MOVEMENT_LIKE_HASHKEY = "MOVEMENT_LIKE_";

//动态喜欢用户HashKey
    public static final String MOVEMENT_LOVE_HASHKEY = "MOVEMENT_LOVE_";

//视频点赞用户HashKey
    public static final String VIDEO_LIKE_HASHKEY = "VIDEO_LIKE";

//访问用户
    public static final String VISITORS = "VISITORS";

//关注用户
    public static final String FOCUS_USER = "FOCUS_USER_{}_{}";

//初始化密码
    public static final String INIT_PASSWORD = "123456";

//环信用户前缀
    public static final String HX_USER_PREFIX = "hx";

//jwt加密盐
    public static final String JWT_SECRET = "itcast";

//jwt超时时间
    public static final int JWT_TIME_OUT = 3_600;
}

```

##### MovementController

```java
/**
 * 推荐动态
 */
@GetMapping("/recommend")
public ResponseEntity recommend(@RequestParam(defaultValue = "1") Integer page,
                                @RequestParam(defaultValue = "10") Integer pagesize) {
    PageResult pr = movementService.findRecommendMovements(page,pagesize);
    return ResponseEntity.ok(pr);
}
```

##### MovementService

```java
//推荐动态
public PageResult findRecommendMovements(Integer page, Integer pagesize) {
    String redisKey = "MOVEMENTS_RECOMMEND_" + UserHolder.getUserId();
    String redisData = this.redisTemplate.opsForValue().get(redisKey);
    List<Movement> list = Collections.EMPTY_LIST;
    if(StringUtils.isEmpty(redisData)){
        list = movementApi.randomMovements(pagesize);
    }else {
        String[] split = redisData.split(",");
        if ((page-1) * pagesize > split.length) {
            return new PageResult();
        }
        List<Long> pids = Arrays.stream(split)
                .skip((page - 1) * pagesize)
                .limit(pagesize)
                .map(e -> Convert.toLong(e))
                .collect(Collectors.toList());
        list = movementApi.findByPids(pids);
    }
    List<Long> userIds = CollUtil.getFieldValues(list, "userId", Long.class);
    //5、循环数据列表
    Map<Long, UserInfo> userMaps = userInfoApi.findByIds(userIds, null);
    List<MovementsVo> vos = new ArrayList<>();
    for (Movement item : list) {
        //5、一个Movement构建一个Vo对象
        UserInfo userInfo = userMaps.get(item.getUserId());
        MovementsVo vo = MovementsVo.init(userInfo, item);
        vos.add(vo);
    }
    //6、构建返回值
    return new PageResult(page,pagesize,0L,vos);
}
```

##### movementApi

```java
//随机获取
public List<Movement> randomMovements(Integer counts) {

TypedAggregation aggregation = Aggregation.newAggregation(Movement.class,
            Aggregation.sample(counts));

AggregationResults<Movement> movements = mongoTemplate.aggregate(aggregation,Movement.class);

return movements.getMappedResults();
}

//根据PID查询
public List<Movement> findByPids(List<Long> pids) {
    Query query = Query.query(Criteria.where("pId").in(pids));
    return mongoTemplate.find(query, Movement.class);
}
```

### 1.3、根据id查询动态

根据id查询动态：当手机端查看评论内容时（需要根据动态id，查询动态详情），后续再去查询评论列表

#### 1.3.1、接口文档

API接口文档：http://192.168.136.160:3000/project/19/interface/api/151

#### 1.3.2、代码实现

##### MovementController

```java
    /**
     * 根据id查询动态
     */
    @GetMapping("/{id}")
    public ResponseEntity findById(@PathVariable("id") String movementId) {
        MovementsVo vo = movementService.findMovementById(movementId);
        return ResponseEntity.ok(vo);
    }

```

##### MovementService

```java

public MovementsVo findMovementById(String movementId) {
    Movement movements = movementApi.findById(movementId);
    if(movements == null) {
        return null;
    }else {
        UserInfo userInfo = userInfoApi.findById(movements.getUserId());
        return MovementsVo.init(userInfo,movements);
    }
}
```

##### movementApi

```java
@Override
public Movement findById(String movementId) {
    return mongoTemplate.findById(movementId,Movement.class);
}
```

## 2、圈子互动

点赞、喜欢、评论等均可理解为用户对动态的互动。

数据库表：`quanzi_comment`

```shell
将数据记录到表中：保存到MongoDB中
互动表需要几张：需要一张表即可（quanzi_comment）
里面的数据需要分类：通过字段commentType 1-点赞，2-评论，3-喜欢
{
    "_id" : ObjectId("5fe7f9263c851428107cd4e8"),
    "publishId" : ObjectId("5fae53947e52992e78a3afa5"),
    "commentType" : 1,
    "userId" : NumberLong(1),
    "publishUserId" : NumberLong(1),
    "created" : NumberLong(1609038118275),
    "likeCount" : 0,
    "_class" : "com.tanhua.domain.mongo.Comment"
}
```

数据存储位置：**redis**，**mongodb**

**mongodb中的数据**

* **在动态详情Movement表中，加入喜欢，点赞，评论数量：检查数据库访问压力**
  * 互动操作的时候，不要忘记对上面的字段进行维护
* **圈子互动的表 comment**
* 互动完成（点赞，喜欢）：不仅要将数据保存到mongo中，需要记录到redis中
* 页面查询圈子列表时，可以从redis中判断是否有点赞，和喜欢历史

### 2.1、环境搭建

#### 2.1.1 创建API接口

```java
public interface CommentApi {
  
}
```

#### 2.1.2 创建API实现类

```java
@DubboService
public class CommentApiImpl implements CommentApi {

@Autowired
    private MongoTemplate mongoTemplate;
}
```

#### 2.1.3 Movement对象

```java
@Data
@NoArgsConstructor
@AllArgsConstructor
@Document(collection = "movement")
public class Movement implements java.io.Serializable {

private ObjectId id; //主键id
    //redis实现，使用Mongodb实现
    private Long pid; //Long类型，用于推荐系统的模型(自动增长)
    private Long created; //发布时间
    private Long userId;
    private String textContent; //文字
    private List<String> medias; //媒体数据，图片或小视频 url
    private String longitude; //经度
    private String latitude; //纬度
    private String locationName; //位置名称
    private Integer state = 0;//状态 0：未审（默认），1：通过，2：驳回

//补充字段
    private Integer likeCount = 0; //点赞数
    private Integer commentCount = 0; //评论数
    private Integer loveCount = 0; //喜欢数
  
    //根据评论类型，获取对应的互动数量
    public Integer statisCount(Integer commentType) {
        if (commentType == CommentType.LIKE.getType()) {
            return this.likeCount;
        } else if (commentType == CommentType.COMMENT.getType()) {
            return this.commentCount;
        } else {
            return loveCount;
        }
    }
}
```

#### 2.1.4 实体类对象

```java
package com.tanhua.domain.mongo;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
import org.bson.types.ObjectId;
import org.springframework.data.mongodb.core.mapping.Document;

/**
 * 圈子互动表（点赞，评论，喜欢）
 */
@Data
@NoArgsConstructor
@AllArgsConstructor
@Document(collection = "comment")
public class Comment implements java.io.Serializable{
  
    private ObjectId id;
    private ObjectId publishId;    //发布id
    private Integer commentType;   //评论类型，1-点赞，2-评论，3-喜欢
    private String content;        //评论内容  
    private Long userId;           //评论人   
    private Long publishUserId;    //被评论人ID
    private Long created; 		   //发表时间
    private Integer likeCount = 0; //当前评论的点赞数
  
}
```

#### 2.1.5 VO对象

```java
@Data
@NoArgsConstructor
@AllArgsConstructor
public class CommentVo implements Serializable {

private String id; //评论id
    private String avatar; //头像
    private String nickname; //昵称

private String content; //评论
    private String createDate; //评论时间
    private Integer likeCount; //点赞数
    private Integer hasLiked; //是否点赞（1是，0否）

public static CommentVo init(UserInfo userInfo, Comment item) {
        CommentVo vo = new CommentVo();
        BeanUtils.copyProperties(userInfo, vo);
        BeanUtils.copyProperties(item, vo);
        vo.setHasLiked(0);
        Date date = new Date(item.getCreated());
        vo.setCreateDate(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(date));
        vo.setId(item.getId().toHexString());
        return vo;
    }
}
```

#### 2.1.6 CommentType枚举

```java
/**
 * 评论类型：1-点赞，2-评论，3-喜欢
 */
public enum CommentType {

LIKE(1), COMMENT(2), LOVE(3);

int type;

CommentType(int type) {
        this.type = type;
    }

public int getType() {
        return type;
    }
}
```

### 2.2、动态评论

功能包括：查询评论列表，发布评论，对评论点赞和取消点赞。

#### 2.2.1 分页列表查询

##### CommentController

```java
//分页查询评理列表
@GetMapping
public ResponseEntity findComments(@RequestParam(defaultValue = "1") Integer page,
                                @RequestParam(defaultValue = "10") Integer pagesize,
                                   String movementId) {
    PageResult pr = commentsService.findComments(movementId,page,pagesize);
    return ResponseEntity.ok(pr);
}
```

##### CommentService

```java
//分页查询评理列表
public PageResult findComments(String movementId, Integer page, Integer pagesize) {
    //1、调用API查询评论列表
    List<Comment> list = commentApi.findComments(movementId,CommentType.COMMENT,page,pagesize);
    //2、判断list集合是否存在
    if(CollUtil.isEmpty(list)) {
        return new PageResult();
    }
    //3、提取所有的用户id,调用UserInfoAPI查询用户详情
    List<Long> userIds = CollUtil.getFieldValues(list, "userId", Long.class);
    Map<Long, UserInfo> map = userInfoApi.findByIds(userIds, null);
    //4、构造vo对象
    List<CommentVo> vos = new ArrayList<>();
    for (Comment comment : list) {
        UserInfo userInfo = map.get(comment.getUserId());
        if(userInfo != null) {
            CommentVo vo = CommentVo.init(userInfo, comment);
            vos.add(vo);
        }
    }
    //5、构造返回值
    return new PageResult(page,pagesize,0l,vos);
}
```

##### CommentAPI

```java
//分页查询
public List<Comment> findComments(String movementId, CommentType commentType, Integer page, Integer pagesize) {
    //1、构造查询条件
    Query query = Query.query(Criteria.where("publishId").is(new ObjectId(movementId)).and("commentType")
            .is(commentType.getType()))
            .skip((page -1) * pagesize)
            .limit(pagesize)
            .with(Sort.by(Sort.Order.desc("created")));
    //2、查询并返回
    return mongoTemplate.find(query,Comment.class);
}
```

#### 2.2.2 发布评论

##### CommentController

```java
@RestController
@RequestMapping("/comments")
public class CommentsController {

@Autowired
    private CommentsService commentsService;

/**
     * 发布评论
     */
    @PostMapping
    public ResponseEntity saveComments(@RequestBody Map map) {
        String movementId = (String )map.get("movementId");
        String comment = (String)map.get("comment");
        commentsService.saveComments(movementId,comment);
        return ResponseEntity.ok(null);
    }
}
```

##### CommentService

```java
@Service
@Slf4j
public class CommentsService {

@DubboReference
    private CommentApi commentApi;

//发布评论
    public void saveComments(String movementId, String comment) {
        //1、获取操作用户id
        Long userId = UserHolder.getUserId();
        //2、构造Comment
        Comment comment1 = new Comment();
        comment1.setPublishId(new ObjectId(movementId));
        comment1.setCommentType(CommentType.COMMENT.getType());
        comment1.setContent(comment);
        comment1.setUserId(userId);
        comment1.setCreated(System.currentTimeMillis());
        //3、调用API保存评论
        Integer commentCount = commentApi.save(comment1);
        log.info("commentCount = " + commentCount);
    }
}
```

##### CommentAPI

```java
//发布评论，并获取评论数量
public Integer save(Comment comment) {
    //1、查询动态
    Movement movement = mongoTemplate.findById(comment.getPublishId(), Movement.class);
    //2、向comment对象设置被评论人属性
    if(movement != null) {
        comment.setPublishUserId(movement.getUserId());
    }
    //3、保存到数据库
    mongoTemplate.save(comment);
    //4、更新动态表中的对应字段
    Query query = Query.query(Criteria.where("id").is(comment.getPublishId()));
    Update update = new Update();
    if(comment.getCommentType() == CommentType.LIKE.getType()) {
        update.inc("likeCount",1);
    }else if (comment.getCommentType() == CommentType.COMMENT.getType()){
        update.inc("commentCount",1);
    }else {
        update.inc("loveCount",1);
    }
    //设置更新参数
    FindAndModifyOptions options = new FindAndModifyOptions();
    options.returnNew(true) ;//获取更新后的最新数据
    Movement modify = mongoTemplate.findAndModify(query, update, options, Movement.class);
    //5、获取最新的评论数量，并返回
    return modify.statisCount(comment.getCommentType() );
}
```

##### 测试API代码

```java
@RunWith(SpringRunner.class)
@SpringBootTest(classes = AppServerApplication.class)
public class CommentApiTest {

@DubboReference
    private CommentApi commentApi;

@Test
    public void testSave() {
        Comment comment = new Comment();
        comment.setCommentType(CommentType.COMMENT.getType());
        comment.setUserId(106l);
        comment.setCreated(System.currentTimeMillis());
        comment.setContent("测试评论");
        comment.setPublishId();
        commentApi.save(comment);
    }
}
```

### 2.3、点赞

#### 2.3.1、编写Controller

修改`MovementsController`代码，添加点赞与取消点赞方法

```java
/**
 * 点赞
 */
@GetMapping("/{id}/like")
public ResponseEntity like(@PathVariable("id") String movementId) {
    Integer likeCount = commentsService.likeComment(movementId);
    return ResponseEntity.ok(likeCount);
}

/**
 * 取消点赞
 */
@GetMapping("/{id}/dislike")
public ResponseEntity dislike(@PathVariable("id") String movementId) {
    Integer likeCount = commentsService.dislikeComment(movementId);
    return ResponseEntity.ok(likeCount);
}
```

#### 2.3.2、编写Service

创建`CommentService`，添加点赞与取消点赞方法

```java
//动态点赞
public Integer likeComment(String movementId) {
    //1、调用API查询用户是否已点赞
    Boolean hasComment = commentApi.hasComment(movementId,UserHolder.getUserId(),CommentType.LIKE);
    //2、如果已经点赞，抛出异常
    if(hasComment) {
        throw  new BusinessException(ErrorResult.likeError());
    }
    //3、调用API保存数据到Mongodb
    Comment comment = new Comment();
    comment.setPublishId(new ObjectId(movementId));
    comment.setCommentType(CommentType.LIKE.getType());
    comment.setUserId(UserHolder.getUserId());
    comment.setCreated(System.currentTimeMillis());
    Integer count = commentApi.save(comment);
    //4、拼接redis的key，将用户的点赞状态存入redis
    String key = Constants.MOVEMENTS_INTERACT_KEY + movementId;
    String hashKey = Constants.MOVEMENT_LIKE_HASHKEY + UserHolder.getUserId();
    redisTemplate.opsForHash().put(key,hashKey,"1");
    return count;
}

//取消点赞
public Integer dislikeComment(String movementId) {
    //1、调用API查询用户是否已点赞
    Boolean hasComment = commentApi.hasComment(movementId,UserHolder.getUserId(),CommentType.LIKE);
    //2、如果未点赞，抛出异常
    if(!hasComment) {
        throw new BusinessException(ErrorResult.disLikeError());
    }
    //3、调用API，删除数据，返回点赞数量
    Comment comment = new Comment();
    comment.setPublishId(new ObjectId(movementId));
    comment.setCommentType(CommentType.LIKE.getType());
    comment.setUserId(UserHolder.getUserId());
    Integer count = commentApi.delete(comment);
    //4、拼接redis的key，删除点赞状态
    String key = Constants.MOVEMENTS_INTERACT_KEY + movementId;
    String hashKey = Constants.MOVEMENT_LIKE_HASHKEY + UserHolder.getUserId();
    redisTemplate.opsForHash().delete(key,hashKey);
    return count;
}
```

#### 2.3.3、修改API服务

##### 判断Comment数据是否存在

```java
//判断comment数据是否存在
public Boolean hasComment(String movementId, Long userId, CommentType commentType) {
    Criteria criteria = Criteria.where("userId").is(userId)
            .and("publishId").is(new ObjectId(movementId))
            .and("commentType").is(commentType.getType());
    Query query = Query.query(criteria);
    return mongoTemplate.exists(query,Comment.class); //判断数据是否存在
}
```

##### 删除互动数据

```java
//删除
public Integer delete(Comment comment) {
    //1、删除Comment表数据
    Criteria criteria = Criteria.where("userId").is(comment.getUserId())
            .and("publishId").is(comment.getPublishId())
            .and("commentType").is(comment.getCommentType());
    Query query = Query.query(criteria);
    mongoTemplate.remove(query,Comment.class);
    //2、修改动态表中的总数量
    Query movementQuery = Query.query(Criteria.where("id").is(comment.getPublishId()));
    Update update = new Update();
    if(comment.getCommentType() == CommentType.LIKE.getType()) {
        update.inc("likeCount",-1);
    }else if (comment.getCommentType() == CommentType.COMMENT.getType()){
        update.inc("commentCount",-1);
    }else {
        update.inc("loveCount",-1);
    }
    //设置更新参数
    FindAndModifyOptions options = new FindAndModifyOptions();
    options.returnNew(true) ;//获取更新后的最新数据
    Movement modify = mongoTemplate.findAndModify(movementQuery, update, options, Movement.class);
    //5、获取最新的评论数量，并返回
    return modify.statisCount(comment.getCommentType() );
}
```

#### 2.3.4、修改查询动态点赞数

修改之前的查询圈子列表代码，从redis查询是否具有操作记录

### 2.4、喜欢

喜欢和取消喜欢：和刚才的点赞与取消点赞基本上市一模一样的！操作的类型comment_type=3,操作的字段loveCount

#### MovementsController

修改`MovementsController`代码，添加喜欢与取消喜欢方法

```java
/**
 * 喜欢
 */
@GetMapping("/{id}/love")
public ResponseEntity love(@PathVariable("id") String movementId) {
    Integer likeCount = commentsService.loveComment(movementId);
    return ResponseEntity.ok(likeCount);
}

/**
 * 取消喜欢
 */
@GetMapping("/{id}/unlove")
public ResponseEntity unlove(@PathVariable("id") String movementId) {
    Integer likeCount = commentsService.disloveComment(movementId);
    return ResponseEntity.ok(likeCount);
}
```

#### CommentService

修改`CommentService`，添加点赞与取消点赞方法

```java
//喜欢
public Integer loveComment(String movementId) {
    //1、调用API查询用户是否已点赞
    Boolean hasComment = commentApi.hasComment(movementId,UserHolder.getUserId(),CommentType.LOVE);
    //2、如果已经喜欢，抛出异常
    if(hasComment) {
        throw  new BusinessException(ErrorResult.loveError());
    }
    //3、调用API保存数据到Mongodb
    Comment comment = new Comment();
    comment.setPublishId(new ObjectId(movementId));
    comment.setCommentType(CommentType.LOVE.getType());
    comment.setUserId(UserHolder.getUserId());
    comment.setCreated(System.currentTimeMillis());
    Integer count = commentApi.save(comment);
    //4、拼接redis的key，将用户的点赞状态存入redis
    String key = Constants.MOVEMENTS_INTERACT_KEY + movementId;
    String hashKey = Constants.MOVEMENT_LOVE_HASHKEY + UserHolder.getUserId();
    redisTemplate.opsForHash().put(key,hashKey,"1");
    return count;
}

//取消喜欢
public Integer disloveComment(String movementId) {
    //1、调用API查询用户是否已点赞
    Boolean hasComment = commentApi.hasComment(movementId,UserHolder.getUserId(),CommentType.LOVE);
    //2、如果未点赞，抛出异常
    if(!hasComment) {
        throw new BusinessException(ErrorResult.disloveError());
    }
    //3、调用API，删除数据，返回点赞数量
    Comment comment = new Comment();
    comment.setPublishId(new ObjectId(movementId));
    comment.setCommentType(CommentType.LOVE.getType());
    comment.setUserId(UserHolder.getUserId());
    Integer count = commentApi.delete(comment);
    //4、拼接redis的key，删除点赞状态
    String key = Constants.MOVEMENTS_INTERACT_KEY + movementId;
    String hashKey = Constants.MOVEMENT_LOVE_HASHKEY + UserHolder.getUserId();
    redisTemplate.opsForHash().delete(key,hashKey);
    return count;
}
```

### 2.5 修复前端点赞和喜欢显示效果Bug

显示效果和`MovementsVo`中的`hasLiked`与`hasLoved`绑定了，所以我们在分页查询动态数据构造`vo`对象时，需要判断是否点赞和喜欢了，对应修改`hasLiked`与`hasLoved`即可。

```java
private PageResult getPageResult(Integer page, Integer pagesize, List<Movement> movementList) {
    if (movementList == null || movementList.isEmpty()) {
        return new PageResult();
    }

// 4. 提取动态发布人的id列表
    List<Long> userIds = CollUtil.getFieldValues(movementList, "userId", Long.class);

// 5. 根据用户的id列表获取用户信息
    Map<Long, UserInfo> map = userInfoApi.findByIds(userIds, null);

// 6. 一个Movement构造一个vo对象
    List<MovementsVo> vos = new ArrayList<>();
    for (Movement movement : movementList) {
        UserInfo userInfo = map.get(movement.getUserId());
        if (userInfo != null) {
            MovementsVo vo = MovementsVo.init(userInfo, movement);
            // 修复点赞和喜欢的bug
            String key = Constants.MOVEMENTS_INTERACT_KEY + movement.getId().toHexString();
            String likeHashKey = Constants.MOVEMENT_LIKE_HASHKEY + UserHolder.getUserId();
            if (redisTemplate.opsForHash().hasKey(key, likeHashKey)) {
                vo.setHasLiked(1);
            }

String loveHashKey = Constants.MOVEMENT_LOVE_HASHKEY + UserHolder.getUserId();
            if (redisTemplate.opsForHash().hasKey(key, loveHashKey)) {
                vo.setHasLoved(1);
            }

vos.add(vo);
        }
    }

// 7. 构造PageResult并返回
    return new PageResult(page, pagesize, 0, vos);
}
```

最后修改：2023 年 01 月 20 日

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本当迷
哈哈时过境迁再看一遍帆的文章质量还是那么高
挺胸的打工人
感谢博主分享
菜菜
一天就学一些我不知道的东西(´இ皿இ｀)
zhanqy
博主赛高！
null ？？［］
还可以把扩展运算符加上呀，这个很有用［…arr］，用于数组合...

【探花交友】圈子互动

Fivk • 2023 年 01 月 11 日