【SSM部落客（博客）项目实战09】初始化日志类别和日志日期信息数据

为了减轻服务器运行负担，所以我打算将一些基本信息初始化，存入缓存中，这样在进行一些初始化的操作的时候就不用老是查询了，极大的减轻了服务器的负担，同时用户体验会大大改善。

废话不多说我开始把核心的代码放出来，一起看下。

与之前的模块功能做法类似 ，唯一麻烦的是数据查询语句稍微难写一点。

查询语句：

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.duruiqi.dao.BlogDao">

    <resultMap type="Blog" id="BlogResult">
        <result property="id" column="id"/>
        <result property="title" column="title"/>
        <result property="summary" column="summary"/>
        <result property="releaseDate" column="releaseDate"/>
        <result property="clickHit" column="clickHit"/>
        <result property="replyHit" column="replyHit"/>
        <result property="content" column="content"/>
        <result property="keyWord" column="keyWord"/>

    </resultMap>

    <select id="countList" resultMap="BlogResult">
        SELECT DATE_FORMAT(releaseDate,‘%Y年%m月‘) AS releaseDateStr,COUNT(*) AS blogCount  FROM t_blog GROUP BY DATE_FORMAT(releaseDate,‘%Y年%m月‘) ORDER BY  DATE_FORMAT(releaseDate,‘%Y年%m月‘) DESC;
    </select>

</mapper> 

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.duruiqi.dao.BlogTypeDao">

    <resultMap type="BlogType" id="BlogTypeResult">
        <result property="id" column="id"/>
        <result property="typeName" column="typeName"/>
        <result property="orderNo" column="orderNo"/>
    </resultMap>

    <select id="countList" resultMap="BlogTypeResult">
        SELECT t2.id,t2.typeName,COUNT(t1.id) AS blogCount FROM t_blog t1 RIGHT JOIN t_blogType  t2 ON t1.typeId=t2.id GROUP BY t2.typeName ORDER BY t2.orderNo;
    </select>

</mapper> 

监听控件

        BlogTypeService blogTypeService=(BlogTypeService) applicationContext.getBean("blogTypeService");
        List<BlogType> blogTypeCountList=blogTypeService.countList(); // 查询博客类别以及博客的数量
        application.setAttribute("blogTypeCountList", blogTypeCountList);

        BlogService blogService=(BlogService) applicationContext.getBean("blogService");
        List<Blog> blogCountList=blogService.countList(); // 根据日期分组查询博客
        application.setAttribute("blogCountList", blogCountList);

页面获取

<c:forEach var="blogTypeCount" items="${blogTypeCountList }">
                            <li><span><a href="#">${blogTypeCount.typeName }(${blogTypeCount.blogCount })</a></span></li>
                        </c:forEach>

<c:forEach var="blogCount" items="${blogCountList }">
                            <li><span><a href="#">${blogCount.releaseDateStr }(${blogCount.blogCount })</a></span></li>
                        </c:forEach>

页面效果：

基础信息初始化到此就结束了，很简单的，O(∩_∩)O哈哈~

【正在看本人博客的这位童鞋，我看你气度不凡，谈吐间隐隐有王者之气，日后必有一番作为！下面有个“顶”字，你就顺手把它点了吧（要先登录CSDN账号哦 ）】

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