springboot +redis 实现点赞、浏览、收藏、评论等数量的增减操作

 private static final String DEFAULT_VALUE = "0:0:0:0:0:0";
  public static final Byte BYTE_ZERO = 0;
  public static final Byte BYTE_ONE = 1;
  public static final Byte BYTE_TWO = 2;
  public static final Byte BYTE_THREE = 3;
  public static final Byte BYTE_FOUR = 4;
  public static final Byte BYTE_FIVE = 5;
  public static final Byte BYTE_SIX = 6;

 @Override
  public DataResponse keepNum(ForumDTO forumDTO) {
    //将帖子id 设置为 key
    String key = forumDTO.getPostId().toString();
    //get 用户id
    String userId = forumDTO.getUserId();
    String count, newCount;
    //绑定数据集key
    BoundHashOperations<String, Object, Object> post = redisTemplate.boundHashOps("post:");
    //获取hKey
    // count: 0论坛-点赞量 1评论量 2收藏量 3浏览 4评论-点赞量
    if (null == post.get(key)) {
      //无则set
      post.put(key, DEFAULT_VALUE);
      //再取出来赋值给 count
      count = post.get(key).toString();
    } else {
      //有直接赋值 count
      count = post.get(key).toString();
    }
    // operationType 1 浏览 2 帖子点赞 3 收藏 4评论-点赞
    String prefix;
    switch (forumDTO.getOperationType()) {
      case 1:
        //记录浏览次数 OPERATIONTYPE 1 : 记录浏览次数
        newCount = resetValue(count, BYTE_THREE, true);
        post.put(key, newCount);
        break;
      case 2:
        //记录帖子-点赞
        prefix = "thumbs:post";
        switch (forumDTO.getClickType()) {
          case 0:
            /**
             * OPERATIONTYPE 2: + CLICKTYPE 0 = 给帖子点赞
             * 0点赞
             * 从redis中获取数量 帖子d 例如:177488r88t78r78r7
             * count: 0论坛-点赞量 1评论量 2收藏量 3浏览 4评论-点赞量
             * 避免每种数量都去查询redis 直接通过 redis value 记录所有的数量
             * 获取加 +1 后的值
             */
            if (redisTemplate.opsForSet().isMember(prefix + ":" + key, prefix + ":" + userId)) {
              return DataResponse.fail("不能重复点赞哦");
            } else {
              redisTemplate.opsForSet().add(prefix + ":" + key, prefix + ":" + userId);
            }
            newCount = resetValue(count, BYTE_ZERO, true);
            //set to redis
            post.put(key, newCount);
            break;
          case 1:
            //OPERATIONTYPE 2: + CLICKTYPE 1 = 取消帖子点赞
            //1取消帖子点赞
            if (!redisTemplate.opsForSet().isMember(prefix + ":" + key, prefix + ":" + userId)) {
              //重复处理
              return DataResponse.fail("不能重复取消哦");
            } else {
              //删除
              redisTemplate.opsForSet().remove(prefix + ":" + key, prefix + ":" + userId);
            }
            newCount = resetValue(count, BYTE_ZERO, false);
            post.put(key, newCount);
            break;
        }
        break;
      case 3:
        prefix = "collection:post";
        List<MqMessage> sendList = new LinkedList<>();
        MqMessage mqMessage = new MqMessage();
        switch (forumDTO.getClickType()) {
          //OPERATIONTYPE 3 + CLICKTYPE 0 = 记录收藏
          case 0:
            //数量+1
            //根据用户id + 帖子id 查询redis 数据
            if (redisTemplate.opsForSet().isMember(prefix + ":" + key, prefix + ":" + userId)) {
              //重复处理
              return DataResponse.fail("不能重复收藏哦");
            }
            //add
            redisTemplate.opsForSet().add(prefix + ":" + key, prefix + ":" + userId);
            //set to redis
            newCount = resetValue(count, BYTE_TWO, true);
            post.put(key, newCount);
            mqMessage.setType(new Byte("9"));
            mqMessage.setSenderId(userId);
            mqMessage.setPostId(forumDTO.getPostId());
            sendList.add(mqMessage);
            this.sendMq.send(sendList);
            break;
          //OPERATIONTYPE 3 + CLICKTYPE 1 = 取消收藏
          case 1:
            //取消收藏
            //尝试从redis取出当前用户是否已经收藏
            if (!redisTemplate.opsForSet().isMember(prefix + ":" + key, prefix + ":" + userId)) {
              //重复处理
              return DataResponse.fail("不能重复取消哦");
            }
            //删除
            redisTemplate.opsForSet().remove(prefix + ":" + key, prefix + ":" + userId);
            newCount = resetValue(count, BYTE_TWO, false);
            post.put(key, newCount);
            mqMessage.setType(new Byte("10"));
            mqMessage.setSenderId(userId);
            mqMessage.setPostId(forumDTO.getPostId());
            sendList.add(mqMessage);
            this.sendMq.send(sendList);
            break;
        }
        break;
      case 4:
        //记录评论-点赞
        // OPERATIONTYPE 4: + CLICKTYPE 0 = 给评论点赞
        if (null == forumDTO.getCommentId()) {
          return DataResponse.fail("评论id不能为空");
        }
        String commentNum, ckey = forumDTO.getCommentId().toString();
        BoundHashOperations<String, Object, Object> comment = redisTemplate.boundHashOps("post:comment");
        if (null == comment.get(ckey)) {
          //无则set
          comment.put(ckey, "0");
          //再取出来赋值给 count
          commentNum = comment.get(ckey).toString();
        } else {
          //有直接赋值 count
          commentNum = comment.get(ckey).toString();
        }
        //赞评论
        prefix = "thumbs:comment";
        switch (forumDTO.getClickType()) {
          case 0:
            /**
             * 0点赞
             * 从redis中获取数量 帖子d 例如:177488r88t78r78r7
             * count: 0论坛-点赞量 1评论量 2收藏量 3浏览 4评论-点赞量
             * 避免每种数量都去查询redis 直接通过 redis value 记录所有的数量
             * 获取加 + 后的值
             */
            if (redisTemplate.opsForSet().isMember(prefix + ":" + ckey, prefix + ":" + userId)) {
              return DataResponse.fail("不能重复点赞哦");
            } else {
              redisTemplate.opsForSet().add(prefix + ":" + ckey, prefix + ":" + userId);
            }
            //set to redis
            comment.put(ckey, cResetValue(commentNum, true));
            break;
          case 1:
            //1取消评论点赞
            if (!redisTemplate.opsForSet().isMember(prefix + ":" + ckey, prefix + ":" + userId)) {
              //重复处理
              return DataResponse.fail("不能重复取消哦");
            } else {
              //删除
              redisTemplate.opsForSet().remove(prefix + ":" + ckey, prefix + ":" + userId);
            }
            newCount = cResetValue(commentNum, false);
            comment.put(ckey, newCount);
            break;
        }
        break;
      default:
        DataResponse.fail(ResponseEnum.FAILED);
    }
    return DataResponse.success(ResponseEnum.SUCCESS);
  }

 /**
   * 功能描述: <br>
   * 〈点赞数、收藏数等数量重置〉
   * @param val  数组
   * @param type  0帖子点赞量 1评论量 2收藏量 3浏览 4评论点赞量
   * @param isPlus 是否增加数量 true +  false -
   * @Return: java.lang.String
   * @Author:王震
   * @Date: 2020/8/5 10:27
   * StringUtils包：import org.apache.commons.lang3.StringUtils;
   * 可以使用jdk的包替代split方法；但jdk的包需要验证正则，效率较低。
   */
  private String resetValue(String val, int j, boolean isPlus) {
    String[] value = StringUtils.split(val, ":");
    Long temp = Long.valueOf(value[j]);
    StringBuffer sb = new StringBuffer(16);
    if (isPlus) {
      temp += 1;
    } else {
      temp -= 1;
    }
    value[j] = temp.toString();
    for (int i = 0, len = value.length; i < len; i++) {
      if (i != len - 1) {
        sb.append(value[i]).append(":");
      }else {
        sb.append(value[i]);
      }
    }
    return sb.toString();
  }