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【项目】仿牛客网社区开发 第5章 Kafka 构建TB级异步消息系统 5 显示系统通知_仿牛客项目kafka
作者：羊村懒王 | 2024-05-15 12:43:10
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仿牛客项目kafka
【项目】仿牛客网社区开发
第5章 Kafka 构建TB级异步消息系统
5 显示系统通知
- 通知列表
- 显示评论、点赞、关注三种类型的通知
- 通知详情
- 分页显示某一类主题所包含的通知
- 未读消息
- 在页面头部显示所有的未读消息数
先来处理通知列表吧，因为数据在message 表中，所以首先就是数据层的mapper
在映射文件中实现这几个接口方法
下面就是业务层的实现
最后是表现层，controller
@RequestMapping(path = "/notice/list", method = RequestMethod.GET)
public String getNoticeList(Model model) {
User user = hostHolder.getUser();
// 查询评论类通知
Message message = messageService.findLatestNotice(user.getId(), TOPIC_COMMENT);
Map<String, Object> messageVO = new HashMap<>();
if (message != null) {
messageVO.put("message", message);
String content = HtmlUtils.htmlUnescape(message.getContent());
Map<String, Object> data = JSONObject.parseObject(content, HashMap.class);
messageVO.put("user", userService.findUserById((Integer) data.get("userId")));
messageVO.put("entityType", data.get("entityType"));
messageVO.put("entityId", data.get("entityId"));
messageVO.put("postId", data.get("postId"));
int count = messageService.findNoticeCount(user.getId(), TOPIC_COMMENT);
messageVO.put("count", count);
int unread = messageService.findNoticeUnreadCount(user.getId(), TOPIC_COMMENT);
messageVO.put("unread", unread);
}
model.addAttribute("commentNotice", messageVO);
// 查询点赞类通知
message = messageService.findLatestNotice(user.getId(), TOPIC_LIKE);
messageVO = new HashMap<>();
if (message != null) {
messageVO.put("message", message);
String content = HtmlUtils.htmlUnescape(message.getContent());
Map<String, Object> data = JSONObject.parseObject(content, HashMap.class);
messageVO.put("user", userService.findUserById((Integer) data.get("userId")));
messageVO.put("entityType", data.get("entityType"));
messageVO.put("entityId", data.get("entityId"));
messageVO.put("postId", data.get("postId"));
int count = messageService.findNoticeCount(user.getId(), TOPIC_LIKE);
messageVO.put("count", count);
int unread = messageService.findNoticeUnreadCount(user.getId(), TOPIC_LIKE);
messageVO.put("unread", unread);
}
model.addAttribute("likeNotice", messageVO);
// 查询关注类通知
message = messageService.findLatestNotice(user.getId(), TOPIC_FOLLOW);
messageVO = new HashMap<>();
if (message != null) {
messageVO.put("message", message);
String content = HtmlUtils.htmlUnescape(message.getContent());
Map<String, Object> data = JSONObject.parseObject(content, HashMap.class);
messageVO.put("user", userService.findUserById((Integer) data.get("userId")));
messageVO.put("entityType", data.get("entityType"));
messageVO.put("entityId", data.get("entityId"));
int count = messageService.findNoticeCount(user.getId(), TOPIC_FOLLOW);
messageVO.put("count", count);
int unread = messageService.findNoticeUnreadCount(user.getId(), TOPIC_FOLLOW);
messageVO.put("unread", unread);
}
model.addAttribute("followNotice", messageVO);
// 查询未读消息数量
int letterUnreadCount = messageService.findLetterUnreadCount(user.getId(), null);
model.addAttribute("letterUnreadCount", letterUnreadCount);
int noticeUnreadCount = messageService.findNoticeUnreadCount(user.getId(), null);
model.addAttribute("noticeUnreadCount", noticeUnreadCount);
return "/site/notice";
}
@RequestMapping(path = "/notice/detail/{topic}", method = RequestMethod.GET)
public String getNoticeDetail(@PathVariable("topic") String topic, Page page, Model model) {
User user = hostHolder.getUser();
page.setLimit(5);
page.setPath("/notice/detail/" + topic);
page.setRows(messageService.findNoticeCount(user.getId(), topic));
List<Message> noticeList = messageService.findNotices(user.getId(), topic, page.getOffset(), page.getLimit());
List<Map<String, Object>> noticeVoList = new ArrayList<>();
if (noticeList != null) {
for (Message notice : noticeList) {
Map<String, Object> map = new HashMap<>();
// 通知
map.put("notice", notice);
// 内容
String content = HtmlUtils.htmlUnescape(notice.getContent());
Map<String, Object> data = JSONObject.parseObject(content, HashMap.class);
map.put("user", userService.findUserById((Integer) data.get("userId")));
map.put("entityType", data.get("entityType"));
map.put("entityId", data.get("entityId"));
map.put("postId", data.get("postId"));
// 通知作者
map.put("fromUser", userService.findUserById(notice.getFromId()));
noticeVoList.add(map);
}
}
model.addAttribute("notices", noticeVoList);
// 设置已读
List<Integer> ids = getLetterIds(noticeList);
if (!ids.isEmpty()) {
messageService.readMessage(ids);
}
return "/site/notice-detail";
}
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记得在上面查私信列表的时候把查通知数量加进去
修改前端模板页面
先是私信那个letter 页面
然后是通知那个页面
<!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}"/>
<link rel="stylesheet" th:href="@{/css/letter.css}"/>
<title>牛客网-通知</title>
</head>
<body>
<div class="nk-container">
<!-- 头部 -->
<header class="bg-dark sticky-top" th:replace="index::header">
<div class="container">
<!-- 导航 -->
<nav class="navbar navbar-expand-lg navbar-dark">
<!-- logo -->
<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>
<!-- 功能 -->
<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>
<!-- 搜索 -->
<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>
<!-- 内容 -->
<div class="main">
<div class="container">
<div class="position-relative">
<!-- 选项 -->
<ul class="nav nav-tabs mb-3">
<li class="nav-item">
<a class="nav-link position-relative" th:href="@{/letter/list}">
朋友私信<span class="badge badge-danger" th:text="${letterUnreadCount}"
th:if="${letterUnreadCount!=0}">3</span>
</a>
</li>
<li class="nav-item">
<a class="nav-link position-relative active" th:href="@{/notice/list}">
系统通知<span class="badge badge-danger" th:text="${noticeUnreadCount}"
th:if="${noticeUnreadCount!=0}">27</span>
</a>
</li>
</ul>
</div>
<!-- 通知列表 -->
<ul class="list-unstyled">
<!--评论类通知-->
<li class="media pb-3 pt-3 mb-3 border-bottom position-relative" th:if="${commentNotice.message!=null}">
<span class="badge badge-danger"
th:text="${commentNotice.unread!=0?commentNotice.unread:''}">3</span>
<img src="http://static.nowcoder.com/images/head/reply.png" class="mr-4 user-header" alt="通知图标">
<div class="media-body">
<h6 class="mt-0 mb-3">
<span>评论</span>
<span class="float-right text-muted font-size-12"
th:text="${#dates.format(commentNotice.message.createTime,'yyyy-MM-dd HH:mm:ss')}">2019-04-28 14:13:25</span>
</h6>
<div>
<a th:href="@{/notice/detail/comment}">
用户
<i th:utext="${commentNotice.user.username}">nowcoder</i>
评论了你的<b th:text="${commentNotice.entityType==1?'帖子':'回复'}">帖子</b> ...
</a>
<ul class="d-inline font-size-12 float-right">
<li class="d-inline ml-2"><span class="text-primary">共 <i
th:text="${commentNotice.count}">3</i> 条会话</span></li>
</ul>
</div>
</div>
</li>
<!--点赞类通知-->
<li class="media pb-3 pt-3 mb-3 border-bottom position-relative" th:if="${likeNotice.message!=null}">
<span class="badge badge-danger" th:text="${likeNotice.unread!=0?likeNotice.unread:''}">3</span>
<img src="http://static.nowcoder.com/images/head/like.png" class="mr-4 user-header" alt="通知图标">
<div class="media-body">
<h6 class="mt-0 mb-3">
<span>赞</span>
<span class="float-right text-muted font-size-12"
th:text="${#dates.format(likeNotice.message.createTime,'yyyy-MM-dd HH:mm:ss')}">2019-04-28 14:13:25</span>
</h6>
<div>
<a th:href="@{/notice/detail/like}">
用户
<i th:utext="${likeNotice.user.username}">nowcoder</i>
点赞了你的<b th:text="${likeNotice.entityType==1?'帖子':'回复'}">帖子</b> ...
</a>
<ul class="d-inline font-size-12 float-right">
<li class="d-inline ml-2"><span class="text-primary">共 <i
th:text="${likeNotice.count}">3</i> 条会话</span></li>
</ul>
</div>
</div>
</li>
<!--关注类通知-->
<li class="media pb-3 pt-3 mb-3 border-bottom position-relative" th:if="${followNotice.message!=null}">
<span class="badge badge-danger" th:text="${followNotice.unread!=0?followNotice.unread:''}">3</span>
<img src="http://static.nowcoder.com/images/head/follow.png" class="mr-4 user-header"
alt="通知图标">
<div class="media-body">
<h6 class="mt-0 mb-3">
<span>关注</span>
<span class="float-right text-muted font-size-12"
th:text="${#dates.format(followNotice.message.createTime,'yyyy-MM-dd HH:mm:ss')}">2019-04-28 14:13:25</span>
</h6>
<div>
<a th:href="@{/notice/detail/follow}">
用户
<i th:utext="${followNotice.user.username}">nowcoder</i>
关注了你 ...
</a>
<ul class="d-inline font-size-12 float-right">
<li class="d-inline ml-2"><span class="text-primary">共 <i
th:text="${followNotice.count}">3</i> 条会话</span></li>
</ul>
</div>
</div>
</li>
</ul>
</div>
</div>
<!-- 尾部 -->
<footer class="bg-dark">
<div class="container">
<div class="row">
<!-- 二维码 -->
<div class="col-4 qrcode">
<img src="https://uploadfiles.nowcoder.com/app/app_download.png" class="img-thumbnail"
style="width:136px;"/>
</div>
<!-- 公司信息 -->
<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>
</body>
</html>
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传新页面，该改的都得改
启动服务器看看效果
登录aaa 那个用户
没问题，现在还有通知详情页
<!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}"/>
<link rel="stylesheet" th:href="@{/css/letter.css}"/>
<title>牛客网-通知详情</title>
</head>
<body>
<div class="nk-container">
<!-- 头部 -->
<header class="bg-dark sticky-top" th:replace="index::header">
<div class="container">
<!-- 导航 -->
<nav class="navbar navbar-expand-lg navbar-dark">
<!-- logo -->
<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>
<!-- 功能 -->
<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;height: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>
<!-- 搜索 -->
<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>
<!-- 内容 -->
<div class="main">
<div class="container">
<div class="row">
<div class="col-8">
<h6><b class="square"></b> 系统通知</h6>
</div>
<div class="col-4 text-right">
<button type="button" class="btn btn-secondary btn-sm" onclick="back();">返回</button>
</div>
</div>
<!-- 通知列表 -->
<ul class="list-unstyled mt-4">
<li class="media pb-3 pt-3 mb-2" th:each="map:${notices}">
<img th:src="${map.fromUser.headerUrl}" class="mr-4 rounded-circle user-header" alt="系统图标">
<div class="toast show d-lg-block" role="alert" aria-live="assertive" aria-atomic="true">
<div class="toast-header">
<strong class="mr-auto" th:utext="${map.fromUser.username}">落基山脉下的闲人</strong>
<small th:text="${#dates.format(map.notice.createTime,'yyyy-MM-dd HH:mm:ss')}">2019-04-25
15:49:32</small>
<button type="button" class="ml-2 mb-1 close" data-dismiss="toast" aria-label="Close">
<span aria-hidden="true">×</span>
</button>
</div>
<div class="toast-body">
<span th:if="${topic.equals('comment')}">
用户
<i th:utext="${map.user.username}">nowcoder</i>
评论了你的<b th:text="${map.entityType==1?'帖子':'回复'}">帖子</b>,
<a class="text-primary" th:href="@{|/discuss/detail/${map.postId}|}">点击查看</a> !
</span>
<span th:if="${topic.equals('like')}">
用户
<i th:utext="${map.user.username}">nowcoder</i>
点赞了你的<b th:text="${map.entityType==1?'帖子':'回复'}">帖子</b>,
<a class="text-primary" th:href="@{|/discuss/detail/${map.postId}|}">点击查看</a> !
</span>
<span th:if="${topic.equals('follow')}">
用户
<i th:utext="${map.user.username}">nowcoder</i>
关注了你,
<a class="text-primary" th:href="@{|/user/profile/${map.user.id}|}">点击查看</a> !
</span>
</div>
</div>
</li>
</ul>
<!-- 分页 -->
<nav class="mt-5" th:replace="index::pagination">
<ul class="pagination justify-content-center">
<li class="page-item"><a class="page-link" href="#">首页</a></li>
<li class="page-item disabled"><a class="page-link" href="#">上一页</a></li>
<li class="page-item active"><a class="page-link" href="#">1</a></li>
<li class="page-item"><a class="page-link" href="#">2</a></li>
<li class="page-item"><a class="page-link" href="#">3</a></li>
<li class="page-item"><a class="page-link" href="#">4</a></li>
<li class="page-item"><a class="page-link" href="#">5</a></li>
<li class="page-item"><a class="page-link" href="#">下一页</a></li>
<li class="page-item"><a class="page-link" href="#">末页</a></li>
</ul>
</nav>
</div>
</div>
<!-- 尾部 -->
<footer class="bg-dark">
<div class="container">
<div class="row">
<!-- 二维码 -->
<div class="col-4 qrcode">
<img src="https://uploadfiles.nowcoder.com/app/app_download.png" class="img-thumbnail"
style="width:136px;"/>
</div>
<!-- 公司信息 -->
<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/letter.js}"></script>
<script>
function back() {
location.href = CONTEXT_PATH + "/notice/list";
}
</script>
</body>
</html>
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这下就可以点进去了
再点就会进到对应的帖子
然后是点击关注
没问题，点击查看会进到对应用户的个人主页
所有的通知查看完毕后
角标就没了。
然后老师有一个勘误，
勘误：通知列表有一个BUG，如果当前用户缺少任何一类通知，则页面报错，提示从Map中找不到message。
原因：对数据判断的不严谨。建议在MessageController的getNoticeList方法里，将每一次messageVO的实例化都放在if之内，然后模板上只判断 messageVO!=null即可。
改一下：
每种都改一下
不为空才封装。
改一下前端模板
这样就算我登录 dingjiaxiong，他没有任何通知 ，
这样才不会报错。【严谨】
最后就是页面顶部那儿，所有的未读消息总和
新建一个拦截器
package com.nowcoder.community.controller.interceptor;
import com.nowcoder.community.entity.User;
import com.nowcoder.community.service.MessageService;
import com.nowcoder.community.util.HostHolder;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
* @Projectname: community
* @Classname: MessageInterceptor
* @Author: Ding Jiaxiong
* @Date:2023/4/22 12:18
*/
@Component
public class MessageInterceptor implements HandlerInterceptor {
@Autowired
private HostHolder hostHolder;
@Autowired
private MessageService messageService;
@Override
public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
User user = hostHolder.getUser();
if (user != null && modelAndView != null) {
int letterUnreadCount = messageService.findLetterUnreadCount(user.getId(), null);
int noticeUnreadCount = messageService.findNoticeUnreadCount(user.getId(), null);
modelAndView.addObject("allUnreadCount", letterUnreadCount + noticeUnreadCount);
}
}
}
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加进拦截配置类
OK，修改一下前端页面模板，首页的
就这个地方，OK，重启服务器，看看效果
我登录aaa 给dingjiaxiong 处理一下
可以看到，是对的
关注他
给dingjiaxiong 的帖子点赞
给它的评论点赞
OK， 返回dingjiaxiong 看看
一共4 条消息，包括1 条私信，3 条系统通知
没问题。就这样。
再提一嘴，关闭kafka 的时候
这样关，不然下次启动可能会异常【当然异常了可以删除日志解决】。OK。
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