1.功能描述
实现帖子详情的功能，即点击列表中某一个帖子的标题，显示出该帖子的详细信息
2. Mapper
dao/DiscussPostMapper.java
编写 selectDiscussPostById() 方法
package com.nowcoder.community.dao;
import com.nowcoder.community.entity.DiscussPost;
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Param;
import java.util.List;
@Mapper
public interface DiscussPostMapper {
List<DiscussPost> selectDiscussPosts(int userId, int offset, int limit);
// @Param注解用于给参数取别名
// 如果只有一个参数，并且在<if>里使用，则必须加别名
int selectDiscussPostRows(@Param("userId") int userId);
int insertDiscussPost(DiscussPost discussPost);
DiscussPost selectDiscussPostById(int id);
}
mapper/discusspost-mapper.xml
编写对应的 SQL 语句
<select id="selectDiscussPostById" resultType="DiscussPost">
select <include refid="selectFields"></include>
from discuss_post
where id = #{
id}
</select>
3. Service
service.DiscussPostService.java
编写 findDiscussPostById() 方法
public DiscussPost findDiscussPostById(int id) {
return discussPostMapper.selectDiscussPostById(id);
}
4. Controller
@GetMapping("/detail/{discussPostId}")
public String getDiscussPost(@PathVariable("discussPostId") int discussPostId, Model model, Page page) {
// 帖子
DiscussPost post = discussPostService.findDiscussPostById(discussPostId);
model.addAttribute("post", post);
// 作者
User user = userService.findUserById(post.getUserId());
model.addAttribute("user", user);
return "/site/discuss-detail";
5. HTML
discuss-detail.html
<!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/discuss-detail.css}" />
<title>牛客网-帖子详情</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;"/>
</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">
<!-- 帖子详情 -->
<div class="container">
<!-- 标题 -->
<h6 class="mb-4">
<img src="http://static.nowcoder.com/images/img/icons/ico-discuss.png"/>
<span th:utext="${post.title}">备战春招，面试刷题跟他复习，一个月全搞定！</span>
<div class="float-right">
<button type="button" class="btn btn-danger btn-sm">置顶</button>
<button type="button" class="btn btn-danger btn-sm">加精</button>
<button type="button" class="btn btn-danger btn-sm">删除</button>
</div>
</h6>
<!-- 作者 -->
<div class="media pb-3 border-bottom">
<a href="profile.html">
<img th:src="${user.headerUrl}" class="align-self-start mr-4 rounded-circle user-header" alt="用户头像" >
</a>
<div class="media-body">
<div class="mt-0 text-warning" th:utext="${user.username}">寒江雪</div>
<div class="text-muted mt-3">
发布于 <b th:text="${#dates.format(post.createTime,'yyyy-MM-dd HH:mm:ss')}">2019-04-15 15:32:18</b>
<ul class="d-inline float-right">
<li class="d-inline ml-2"><a href="#" class="text-primary">赞 11</a></li>
<li class="d-inline ml-2">|</li>
<li class="d-inline ml-2"><a href="#replyform" class="text-primary">回帖 <i th:text="${post.commentCount}">7</i></a></li>
</ul>
</div>
</div>
</div>
<!-- 正文 -->
<div class="mt-4 mb-3 content" th:utext="${post.content}">
金三银四的金三已经到了，你还沉浸在过年的喜悦中吗？
如果是，那我要让你清醒一下了：目前大部分公司已经开启了内推，正式网申也将在3月份陆续开始，金三银四，春招的求职黄金时期已经来啦！！！
再不准备，作为19应届生的你可能就找不到工作了。。。作为20届实习生的你可能就找不到实习了。。。
现阶段时间紧，任务重，能做到短时间内快速提升的也就只有算法了，
那么算法要怎么复习？重点在哪里？常见笔试面试算法题型和解题思路以及最优代码是怎样的？
跟左程云老师学算法，不仅能解决以上所有问题，还能在短时间内得到最大程度的提升！！！
</div>
</div>
<!-- 回帖 -->
<div class="container mt-3">
<!-- 回帖数量 -->
<div class="row">
<div class="col-8">
<h6><b class="square"></b> <i th:text="${post.commentCount}">30</i>条回帖</h6>
</div>
<div class="col-4 text-right">
<a href="#replyform" class="btn btn-primary btn-sm"> 回 帖 </a>
</div>
</div>
<!-- 回帖列表 -->
<ul class="list-unstyled mt-4">
<li class="media pb-3 pt-3 mb-3 border-bottom" th:each="cvo:${comments}">
<a href="profile.html">
<img th:src="${cvo.user.headerUrl}" class="align-self-start mr-4 rounded-circle user-header" alt="用户头像" >
</a>
<div class="media-body">
<div class="mt-0">
<span class="font-size-12 text-success" th:utext="${cvo.user.username}">掉脑袋切切</span>
<span class="badge badge-secondary float-right floor">
<i th:text="${page.offset + cvoStat.count}">1</i>#
</span>
</div>
<div class="mt-2" th:utext="${cvo.comment.content}">
这开课时间是不是有点晚啊。。。
</div>
<div class="mt-4 text-muted font-size-12">
<span>发布于 <b th:text="${#dates.format(cvo.comment.createTime,'yyyy-MM-dd HH:mm:ss')}">2019-04-15 15:32:18</b></span>
<ul class="d-inline float-right">
<li class="d-inline ml-2"><a href="#" class="text-primary">赞(1)</a></li>
<li class="d-inline ml-2">|</li>
<li class="d-inline ml-2"><a href="#" class="text-primary">回复(<i th:text="${cvo.replyCount}">2</i>)</a></li>
</ul>
</div>
<!-- 回复列表 -->
<ul class="list-unstyled mt-4 bg-gray p-3 font-size-12 text-muted">
<li class="pb-3 pt-3 mb-3 border-bottom" th:each="rvo:${cvo.replys}">
<div>
<span th:if="${rvo.target==null}">
<b class="text-info" th:text="${rvo.user.username}">寒江雪</b>:
</span>
<span th:if="${rvo.target!=null}">
<i class="text-info" th:text="${rvo.user.username}">Sissi</i> 回复
<b class="text-info" th:text="${rvo.target.username}">寒江雪</b>:
</span>
<span th:utext="${rvo.reply.content}">这个是直播时间哈，觉得晚的话可以直接看之前的完整录播的~</span>
</div>
<div class="mt-3">
<span th:text="${#dates.format(rvo.reply.createTime,'yyyy-MM-dd HH:mm:ss')}">2019-04-15 15:32:18</span>
<ul class="d-inline float-right">
<li class="d-inline ml-2"><a href="#" class="text-primary">赞(1)</a></li>
<li class="d-inline ml-2">|</li>
<li class="d-inline ml-2"><a th:href="|#huifu-${rvoStat.count}|" data-toggle="collapse" class="text-primary">回复</a></li>
</ul>
<div th:id="|huifu-${rvoStat.count}|" class="mt-4 collapse">
<form method="post" th:action="@{|/comment/add/${post.id}|}">
<div>
<input type="text" class="input-size" name="content" th:placeholder="|回复${rvo.user.username}|"/>
<input type="hidden" name="entityType" value="2">
<input type="hidden" name="entityId" th:value="${cvo.comment.id}">
<input type="hidden" name="targetId" th:value="${rvo.user.id}">
</div>
<div class="text-right mt-2">
<button type="submit" class="btn btn-primary btn-sm" onclick="#"> 回 复 </button>
</div>
</form>
</div>
</div>
</li>
<!-- 回复输入框 -->
<li class="pb-3 pt-3">
<form method="post" th:action="@{|/comment/add/${post.id}|}">
<div>
<input type="text" class="input-size" name="content" placeholder="请输入你的观点"/>
<input type="hidden" name="entityType" value="2">
<input type="hidden" name="entityId" th:value="${cvo.comment.id}">
</div>
<div class="text-right mt-2">
<button type="submit" class="btn btn-primary btn-sm" onclick="#"> 回 复 </button>
</div>
</form>
</li>
</ul>
</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>
<!-- 回帖输入 -->
<div class="container mt-3">
<form class="replyform" method="post" th:action="@{|/comment/add/${post.id}|}">
<p class="mt-3">
<a name="replyform"></a>
<textarea placeholder="在这里畅所欲言你的看法吧!" name="content"></textarea>
<input type="hidden" name="entityType" value="1">
<input type="hidden" name="entityId" th:value="${post.id}">
</p>
<p class="text-right">
<button type="submit" class="btn btn-primary btn-sm"> 回 帖 </button>
</p>
</form>
</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>
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<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>
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</li>
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</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>
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<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
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联系方式：010-60728802(电话) admin@nowcoder.com
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