【项目】仿牛客网社区开发第4章 Redis 一站式高性能存储方案 4 我收到的赞

你的名字 2024-03-22 15:24 13阅读 0赞

### 【项目】仿牛客网社区开发 ###

#### 文章目录 ####

*   *  【项目】仿牛客网社区开发
     *   *  第4章 Redis 一站式高性能存储方案
         *   *  4 我收到的赞

![在这里插入图片描述][51bc0fbdaceb4b9692014f635b9becb6.png_pic_center]

#### 第4章 Redis 一站式高性能存储方案 ####

##### 4 我收到的赞 #####

*  重构点赞功能
    
     *  以用户为key，记录点赞数量
     *  increment(key)，decrement(key)
 *  开发个人主页
    
     *  以用户为key，查询点赞数量

![在这里插入图片描述][c0f3c2674bb2489db7e611dfea3ba2e4.png_pic_center]

先修改key 工具

// 某个用户的赞
        // like:user:userId -> int
        public static String getUserLikeKey(int userId) {
        
            return PREFIX_USER_LIKE + SPLIT + userId;
        }

![在这里插入图片描述][8cbaa19a736b41eb94a2d1e9c2b9feeb.png_pic_center]

重构点赞的业务方法

package com.nowcoder.community.service;
    
    import com.nowcoder.community.util.RedisKeyUtil;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.dao.DataAccessException;
    import org.springframework.data.redis.core.RedisOperations;
    import org.springframework.data.redis.core.RedisTemplate;
    import org.springframework.data.redis.core.SessionCallback;
    import org.springframework.stereotype.Service;
    
    /**
     * @Projectname: community
     * @Classname: LikeService
     * @Author: Ding Jiaxiong
     * @Date:2023/4/21 19:58
     */
    
    @Service
    public class LikeService {
        
    
        @Autowired
        private RedisTemplate redisTemplate;
    
        // 点赞
        public void like(int userId, int entityType, int entityId, int entityUserId) {
        
            redisTemplate.execute(new SessionCallback() {
        
                @Override
                public Object execute(RedisOperations operations) throws DataAccessException {
        
                    String entityLikeKey = RedisKeyUtil.getEntityLikeKey(entityType, entityId);
                    String userLikeKey = RedisKeyUtil.getUserLikeKey(entityUserId);
    
                    boolean isMember = operations.opsForSet().isMember(entityLikeKey, userId);
    
                    operations.multi();
    
                    if (isMember) {
        
                        operations.opsForSet().remove(entityLikeKey, userId);
                        operations.opsForValue().decrement(userLikeKey);
                    } else {
        
                        operations.opsForSet().add(entityLikeKey, userId);
                        operations.opsForValue().increment(userLikeKey);
                    }
    
                    return operations.exec();
                }
            });
        }
    
        // 查询某实体点赞的数量
        public long findEntityLikeCount(int entityType, int entityId) {
        
            String entityLikeKey = RedisKeyUtil.getEntityLikeKey(entityType, entityId);
            return redisTemplate.opsForSet().size(entityLikeKey);
        }
    
        // 查询某人对某实体的点赞状态
        public int findEntityLikeStatus(int userId, int entityType, int entityId) {
        
            String entityLikeKey = RedisKeyUtil.getEntityLikeKey(entityType, entityId);
            return redisTemplate.opsForSet().isMember(entityLikeKey, userId) ? 1 : 0;
        }
    
        // 查询某个用户获得的赞
        public int findUserLikeCount(int userId) {
        
            String userLikeKey = RedisKeyUtil.getUserLikeKey(userId);
            Integer count = (Integer) redisTemplate.opsForValue().get(userLikeKey);
            return count == null ? 0 : count.intValue();
        }
    
    }

修改控制器

package com.nowcoder.community.controller;
    
    import com.nowcoder.community.entity.User;
    import com.nowcoder.community.service.LikeService;
    import com.nowcoder.community.util.CommunityUtil;
    import com.nowcoder.community.util.HostHolder;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.stereotype.Controller;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.RequestMethod;
    import org.springframework.web.bind.annotation.ResponseBody;
    
    import java.util.HashMap;
    import java.util.Map;
    
    /**
     * @Projectname: community
     * @Classname: LikeController
     * @Author: Ding Jiaxiong
     * @Date:2023/4/21 20:02
     */
    
    @Controller
    public class LikeController {
        
    
        @Autowired
        private LikeService likeService;
    
        @Autowired
        private HostHolder hostHolder;
    
        @RequestMapping(path = "/like", method = RequestMethod.POST)
        @ResponseBody
        public String like(int entityType, int entityId, int entityUserId) {
        
            User user = hostHolder.getUser();
    
            // 点赞
            likeService.like(user.getId(), entityType, entityId, entityUserId);
    
            // 数量
            long likeCount = likeService.findEntityLikeCount(entityType, entityId);
            // 状态
            int likeStatus = likeService.findEntityLikeStatus(user.getId(), entityType, entityId);
            // 返回的结果
            Map<String, Object> map = new HashMap<>();
            map.put("likeCount", likeCount);
            map.put("likeStatus", likeStatus);
    
            return CommunityUtil.getJSONString(0, null, map);
        }
    
    }

![在这里插入图片描述][6371444529404f47b222214acd8cff5d.png_pic_center]

OK， 修改前端页面模板

![在这里插入图片描述][c583dda8b80346568ae89c88649f1650.png_pic_center]

三个地方都要多一个参数

![在这里插入图片描述][7e1ab00e5a1643299d4e8c470810962d.png_pic_center]

![在这里插入图片描述][1ef29c44de2545cbbe5abbc7973f567f.png_pic_center]

还有js 文件中

![在这里插入图片描述][3f29501c773a4c35986646094e2c7a15.png_pic_center]

然后个人主页的处理，先修改controller

![在这里插入图片描述][d7ed0b50a7bf4b238c5947903a93dcaf.png_pic_center]

修改模板【又是一个新的前端页面】

首先是首页点击那个地方

![在这里插入图片描述][26f09a0196b24e4e88515a03974a871d.png_pic_center]

还有每个用户的头像，可以点进去查看TA的主页

![在这里插入图片描述][f5f375a89666460b86817d3f5f8a298c.png_pic_center]

然后是对应页面模板

<!doctype html>
    <html lang="en" xmlns:th="http://www.thymeleaf.org">
    <head>
        <meta charset="utf-8">
        <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
        <link rel="icon" href="https://static.nowcoder.com/images/logo_87_87.png"/>
        <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css"
              crossorigin="anonymous">
        <link rel="stylesheet" th:href="@{/css/global.css}"/>
        <title>牛客网-个人主页</title>
    </head>
    <body>
    <div class="nk-container">
        
        <header class="bg-dark sticky-top" th:replace="index::header">
            <div class="container">
                
                <nav class="navbar navbar-expand-lg navbar-dark">
                    
                    <a class="navbar-brand" href="#"></a>
                    <button class="navbar-toggler" type="button" data-toggle="collapse"
                            data-target="#navbarSupportedContent" aria-controls="navbarSupportedContent"
                            aria-expanded="false" aria-label="Toggle navigation">
                        <span class="navbar-toggler-icon"></span>
                    </button>
                    
                    <div class="collapse navbar-collapse" id="navbarSupportedContent">
                        <ul class="navbar-nav mr-auto">
                            <li class="nav-item ml-3 btn-group-vertical">
                                <a class="nav-link" href="../index.html">首页</a>
                            </li>
                            <li class="nav-item ml-3 btn-group-vertical">
                                <a class="nav-link position-relative" href="letter.html">消息<span
                                        class="badge badge-danger">12</span></a>
                            </li>
                            <li class="nav-item ml-3 btn-group-vertical">
                                <a class="nav-link" href="register.html">注册</a>
                            </li>
                            <li class="nav-item ml-3 btn-group-vertical">
                                <a class="nav-link" href="login.html">登录</a>
                            </li>
                            <li class="nav-item ml-3 btn-group-vertical dropdown">
                                <a class="nav-link dropdown-toggle" href="#" id="navbarDropdown" role="button"
                                   data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
                                    <img src="http://images.nowcoder.com/head/1t.png" class="rounded-circle"
                                         style="width:30px;"/>
                                </a>
                                <div class="dropdown-menu" aria-labelledby="navbarDropdown">
                                    <a class="dropdown-item text-center" href="profile.html">个人主页</a>
                                    <a class="dropdown-item text-center" href="setting.html">账号设置</a>
                                    <a class="dropdown-item text-center" href="login.html">退出登录</a>
                                    <div class="dropdown-divider"></div>
                                    <span class="dropdown-item text-center text-secondary">nowcoder</span>
                                </div>
                            </li>
                        </ul>
                        
                        <form class="form-inline my-2 my-lg-0" action="search.html">
                            <input class="form-control mr-sm-2" type="search" aria-label="Search"/>
                            <button class="btn btn-outline-light my-2 my-sm-0" type="submit">搜索</button>
                        </form>
                    </div>
                </nav>
            </div>
        </header>
    
        
        <div class="main">
            <div class="container">
                
                <div class="position-relative">
                    <ul class="nav nav-tabs">
                        <li class="nav-item">
                            <a class="nav-link active" href="profile.html">个人信息</a>
                        </li>
                        <li class="nav-item">
                            <a class="nav-link" href="my-post.html">我的帖子</a>
                        </li>
                        <li class="nav-item">
                            <a class="nav-link" href="my-reply.html">我的回复</a>
                        </li>
                    </ul>
                </div>
                
                <div class="media mt-5">
                    <img th:src="${user.headerUrl}" class="align-self-start mr-4 rounded-circle" alt="用户头像"
                         style="width:50px;">
                    <div class="media-body">
                        <h5 class="mt-0 text-warning">
                            <span th:utext="${user.username}">nowcoder</span>
                            <button type="button" class="btn btn-info btn-sm float-right mr-5 follow-btn">关注TA</button>
                        </h5>
                        <div class="text-muted mt-3">
                            <span>注册于 <i class="text-muted"
                                            th:text="${#dates.format(user.createTime,'yyyy-MM-dd HH:mm:ss')}">2015-06-12 15:20:12</i></span>
                        </div>
                        <div class="text-muted mt-3 mb-5">
                            <span>关注了 <a class="text-primary" href="followee.html">5</a> 人</span>
                            <span class="ml-4">关注者 <a class="text-primary" href="follower.html">123</a> 人</span>
                            <span class="ml-4">获得了 <i class="text-danger" th:text="${likeCount}">87</i> 个赞</span>
                        </div>
                    </div>
                </div>
            </div>
        </div>
    
        
        <footer class="bg-dark">
            <div class="container">
                <div class="row">
                    
                    <div class="col-4 qrcode">
                        <img src="https://uploadfiles.nowcoder.com/app/app_download.png" class="img-thumbnail"
                             style="width:136px;"/>
                    </div>
                    
                    <div class="col-8 detail-info">
                        <div class="row">
                            <div class="col">
                                <ul class="nav">
                                    <li class="nav-item">
                                        <a class="nav-link text-light" href="#">关于我们</a>
                                    </li>
                                    <li class="nav-item">
                                        <a class="nav-link text-light" href="#">加入我们</a>
                                    </li>
                                    <li class="nav-item">
                                        <a class="nav-link text-light" href="#">意见反馈</a>
                                    </li>
                                    <li class="nav-item">
                                        <a class="nav-link text-light" href="#">企业服务</a>
                                    </li>
                                    <li class="nav-item">
                                        <a class="nav-link text-light" href="#">联系我们</a>
                                    </li>
                                    <li class="nav-item">
                                        <a class="nav-link text-light" href="#">免责声明</a>
                                    </li>
                                    <li class="nav-item">
                                        <a class="nav-link text-light" href="#">友情链接</a>
                                    </li>
                                </ul>
                            </div>
                        </div>
                        <div class="row">
                            <div class="col">
                                <ul class="nav btn-group-vertical company-info">
                                    <li class="nav-item text-white-50">
                                        公司地址：北京市朝阳区大屯路东金泉时代3-2708北京牛客科技有限公司
                                    </li>
                                    <li class="nav-item text-white-50">
                                        联系方式：010-60728802(电话)    admin@nowcoder.com
                                    </li>
                                    <li class="nav-item text-white-50">
                                        牛客科技©2018 All rights reserved
                                    </li>
                                    <li class="nav-item text-white-50">
                                        京ICP备14055008号-4     
                                        <img src="http://static.nowcoder.com/company/images/res/ghs.png"
                                             style="width:18px;"/>
                                        京公网安备 11010502036488号
                                    </li>
                                </ul>
                            </div>
                        </div>
                    </div>
                </div>
            </div>
        </footer>
    </div>
    
    <script src="https://code.jquery.com/jquery-3.3.1.min.js" crossorigin="anonymous"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.7/umd/popper.min.js"
            crossorigin="anonymous"></script>
    <script src="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js" crossorigin="anonymous"></script>
    <script th:src="@{/js/global.js}"></script>
    <script th:src="@{/js/profile.js}"></script>
    </body>
    </html>

在测试之前，把之前redis 中的点赞数据清空

![在这里插入图片描述][64309a2dbf374c4bac9f1f67e3decc44.png_pic_center]

直接启动测试

![在这里插入图片描述][2a08e40aef6b46baa086ead5320c45e5.png_pic_center]

这个地方点进去

![在这里插入图片描述][d6e2acdfed1b46f08337eb96c36daa0e.png_pic_center]

OK，这个数量正确了

![在这里插入图片描述][f3f39740494e487dbf1f1d6d6839a779.png_pic_center]

给aaa 的这篇帖子点个赞之后进它的个人主页

![在这里插入图片描述][4dd444992d654150a4cde43d939c6cea.png_pic_center]

当然这里还不能直接点过去，因为没改那儿，可以改一下

![在这里插入图片描述][657f1f7c16964bbd90b3b21fd39560ce.png_pic_center]

重启服务器试试

![在这里插入图片描述][679175b405d44b6b8d7de4fa6ffc0d70.gif_pic_center]

没问题。同理，这个点赞数量，评论的也会算进去

![在这里插入图片描述][4dcd5e96649c488d985579b9a9d7f5b4.png_pic_center]

![在这里插入图片描述][db1c84688d3f4e7fb0ae79e3bb3c8a2d.png_pic_center]

查看aaa 的主页

![在这里插入图片描述][44e9d9000e624d9eb9a840aefea2b1c5.png_pic_center]

没问题。

[51bc0fbdaceb4b9692014f635b9becb6.png_pic_center]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/18/71eb29002bed46adb62aca6327d83387.png
[c0f3c2674bb2489db7e611dfea3ba2e4.png_pic_center]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/18/2129a7a0b1e946789943d4761e991567.png
[8cbaa19a736b41eb94a2d1e9c2b9feeb.png_pic_center]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/18/9d1b82fff8ab4e348e418d515b6b4060.png
[6371444529404f47b222214acd8cff5d.png_pic_center]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/18/b125a4193571433bbc7acc67e8896c41.png
[c583dda8b80346568ae89c88649f1650.png_pic_center]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/18/8789509c65fa4a5ea47769380d86f268.png
[7e1ab00e5a1643299d4e8c470810962d.png_pic_center]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/18/02a6caa3946345d5a52bceb04eeb010e.png
[1ef29c44de2545cbbe5abbc7973f567f.png_pic_center]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/18/04de528b607d40838a2525a1aa694270.png
[3f29501c773a4c35986646094e2c7a15.png_pic_center]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/18/5eb4b8c27cd84129aa8740c4332a1b1c.png
[d7ed0b50a7bf4b238c5947903a93dcaf.png_pic_center]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/18/5553e8913e464bb5b1bd48d75f5c4f8a.png
[26f09a0196b24e4e88515a03974a871d.png_pic_center]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/18/d2aea9f7176b4cccbceb2fbf072a11fc.png
[f5f375a89666460b86817d3f5f8a298c.png_pic_center]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/18/da3f78f4dd6c4259afe9dac42b12485b.png
[64309a2dbf374c4bac9f1f67e3decc44.png_pic_center]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/18/adc4b35b38fc43a7b31e4d44d8215952.png
[2a08e40aef6b46baa086ead5320c45e5.png_pic_center]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/18/260be8d4e3ee4296904faab2012cbe11.png
[d6e2acdfed1b46f08337eb96c36daa0e.png_pic_center]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/18/9a6580288f8d497b988df1c85f73a3cf.png
[f3f39740494e487dbf1f1d6d6839a779.png_pic_center]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/18/c7593d8c03d943db939b7dbc7fd9caa6.png
[4dd444992d654150a4cde43d939c6cea.png_pic_center]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/18/e718f5736da54c11927bcc578a0667b9.png
[657f1f7c16964bbd90b3b21fd39560ce.png_pic_center]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/18/8b87ff651dcf44d2a8d0495601dc51c6.png
[679175b405d44b6b8d7de4fa6ffc0d70.gif_pic_center]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/18/43bd0f60cefc4a2284bc7f68e462a214.png
[4dcd5e96649c488d985579b9a9d7f5b4.png_pic_center]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/18/f820686c9d9f48c1932f403eac476b36.png
[db1c84688d3f4e7fb0ae79e3bb3c8a2d.png_pic_center]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/18/faabb01b874e47b4b2abf124991f3242.png
[44e9d9000e624d9eb9a840aefea2b1c5.png_pic_center]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/18/b0f1ebde89ed4364ab91dd751e99ff79.png