基于 Spring Boot 博客系统开发（九）

基于 Spring Boot 博客系统开发（九）

本系统是简易的个人博客系统开发，为了更加熟练地掌握 SprIng Boot 框架及相关技术的使用。🌿🌿🌿
基于 Spring Boot 博客系统开发（八）👈👈

文章管理实现

这里仅实现文章列表和分页

视图对象如下

@Data
public class ArticleVO {
    private Long id;
    private String title;
    private LocalDate created;
    private Integer hits;
    private String categories;
}

自定义SQL，SQL视图如下

ArticleMapper.xml 添加自定义SQL，添加 resultMap 映射关系

    <resultMap id="ArticleVOResult" type="ArticleVO">
        <id property="id" column="id"></id>
        <result property="title" column="title"></result>
        <result property="created" column="created"></result>
        <result property="categories" column="categories"></result>
        <result property="hits" column="hits"></result>
    </resultMap>
    
   <select id="selectArticle" resultMap="ArticleVOResult">
        select a.id,a.title,a.created,a.categories,s.hits from t_article a LEFT JOIN t_statistic s ON a.id = s.article_id
    </select>

ArticleMapper 添加 selectArticle 方法，方法名跟上面select id 一致

List<ArticleVO> selectArticle();

IArticleService 添加接口

List<ArticleVO> selectArticle();

ArticleServiceImpl 添加实现方法调用 ArticleMapper selectArticle 方法

  @Override
    public List<ArticleVO> selectArticle() {
        return articleMapper.selectArticle();
    }

AdminController 添加查询文章列表逻辑代码

    @RequestMapping("/list")
    public String list(Model model,@RequestParam(defaultValue = "1") Integer pageNum){
        PageHelper.startPage(pageNum,10);
        List<ArticleVO> list = articleService.selectArticle();
        PageInfo<ArticleVO> articlePage = new PageInfo<>(list);
        model.addAttribute("articlePage",articlePage);
        return "admin/list";
    }

文章列表模板，使用 thymeleaf 表达式动态渲染数据

	   <tr th:each="article:${articlePage.list}">
        <td>
            <a href="/article/12" target="_blank" th:text="${article.title}" >Spring Boot 2 权威发布</a>
        </td>
        <td th:text="${article.created}">2018-12-12</td>
        <td th:text="${article.hits}">44</td>
        <td th:text="${article.categories}">默认分类</td>
        <td>
            <a href="/admin/article/12"
               class="btn btn-primary btn-sm waves-effect waves-light m-b-5">
                <i class="fa fa-edit"></i> <span>编辑</span></a>
            <a href="javascript:void(0)" onclick="delArticle(12);"
               class="btn btn-danger btn-sm waves-effect waves-light m-b-5">
                <i class="fa fa-trash-o"></i> <span>删除</span></a>
            <a class="btn btn-warning btn-sm waves-effect waves-light m-b-5" href="javascript:void(0)">
                <i class="fa fa-rocket"></i> <span>预览</span></a>
        </td>
    </tr>									

分页模板代码

 <!--分页-->
    <div class="clearfix">
        <ul class="pagination m-b-5 pull-right">
            <li>
                <a th:unless="${articlePage.isFirstPage}" th:href="${'?pageNum='+articlePage.prePage}" aria-label="Pre">
                    上一页&nbsp;<i class="fa fa-angle-left"></i>
                </a>
            </li>
            <li th:each="num:${articlePage.navigatepageNums}" th:class="${num == articlePage.pageNum?'active':''}">
                <a th:href="${'?pageNum='+num}" th:text="${num}">1</a>
            </li>
            <li>
                <a th:unless="${articlePage.isLastPage}"  th:href="${'?pageNum='+articlePage.nextPage}" aria-label="Next">
                    下一页&nbsp;<i class="fa fa-angle-right"></i>
                </a>
            </li>
            <li><span>共[[${articlePage.size}]]页</span></li>
        </ul>
    </div>