博客系统 (三）

博客系统
博客主页
- 前端
- 后端
- 个人博客
- - 前端
  - 后端
  - - 显示个人文章
    - 删除文章
- 修改文章
- - 前端
  - 后端
  - - 提取文章
    - 修改文章
  - 显示正文内容
  - - 前端
    - 后端
    - 文章阅读量功能
添加文章
- 前端
- 后端
如何使用Redis
项目地点：

博客系统

博客系统是干什么的？
CSDN就是一个典型的博客系统。而我在这里就是通过模拟实现一个博客系统，这是一个较为简单的博客系统，但是主要功能一个不缺，不过就是 UI 有些 low，我学习前端是为了写后端更加顺手。不至于前后端完全分离，但是有个问题设计的 web 页面不是很好看。

首先我将整体的业务流程展现
在这里插入图片描述
我们继博客系统（二）继续，编写，到了主页的业务逻辑了

接下来的流程是通过，网页端，后端统一数据结构交互的数据结构。

博客主页

前端

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>博客列表</title>
    <link rel="stylesheet" href="css/list.css">
    <link rel="stylesheet" href="css/blog_list.css">
    <link rel="stylesheet" href="css/conmmon.css"></lin>
    <script src="js/jquery.min.js"></script>
    <style>
        .nav{
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: 50px;
        }
        .container{
            padding-top: 80px;
            height: auto;
        }
        .container-right{
            width: auto;
        }
        .blog-pagnation-wrapper{
            height: 40px;
            margin: 16px 0;
            text-align: center;
        }
        .blog-pagnation-item{
            display: inline-block;
            padding: 8px;
            border: 1px solid #d0d0d5;
            color: #333;
        }
        .blog-pagnation-item:hover{
            background: #4e4eeb;
            color: #fff;
        }
        .blog-pagnation-item.actvie{
            background: #4e4eeb;
            color: #fff;
        }

    </style>
    <script src="js/urluitils.js"></script>
</head>

<body>

    <!-- 导航栏 -->
    <div class="nav">
        <img src="img/sleep.jpg" alt="">
        <span class="title">我的博客系统</span>
        <!-- 用来占据中间位置 -->
        <span class="spacer"></span>
        <a href="blog_list.html">主页</a>
        <a href="blog_add.html">写博客</a>
        <a href="myblog_list.html">我的博客</a>
        <a href="javascript:logout()">注销</a>
    </div>
    <!-- 版心 -->
    <div class="container">
        <!-- 右侧内容详情 -->
        <div class="container-right" style="width: 100%;">
            <div id="artListDiv">
                <!-- 每一篇博客包含标题, 摘要, 时间 -->
            </div>
            <div class="blog-pagnation-wrapper">
                <button class="blog-pagnation-item" onclick="doFirst()">首页</button> 
                <button class="blog-pagnation-item" onclick="doBefore()">上一页</button>  
                <button class="blog-pagnation-item" onclick="doNext()">下一页</button>
                <button class="blog-pagnation-item" onclick="doLast()">末页</button>
                &nbsp; &nbsp; &nbsp; &nbsp;
                当前在第<span id="pindex"></span>页
                共:<span id="psize"></span>页
            </div>
        </div>
    </div>
    <script>
        var psize=2;
        var pindex=1;
        var totalpage=1;//总页
        //初始化数据
        function init(){
            //得到url中的分页参数
            psize=getParamValue("psize");
            if(psize==null){
                psize=2;
            }
            pindex=getParamValue("pindex");
            if(pindex==null){
                pindex=1;
            }
            jQuery("#pindex").html(pindex);
            //请求后端接口
            jQuery.ajax({
                url:"/article/getlistbypage",
                type:"get",
                data:{
                    "pindex":pindex,
                    "psize":psize
                },
                success:function(res){
                    if(res.code==200&&res.data!=null){
                        var createHtml="";
                        if(res.data.list!=null&&res.data.list.length>0){
                            //文章
                            totalpage =res.data.list.szie;
                            jQuery("#psize").html(totalpage);
                            var artList=res.data.list;
                            for(var i=0;i<artList.length;i++){
                                var art=artList[i];
                                createHtml+='<div class="blog">';
                                createHtml+='<div class="title">'+art.title+'</div>';
                                createHtml+='<div class="date">'+art.createtime+'</div>';
                                createHtml+='<div class="desc">'+art.content+'</div>';
                                createHtml+=' <a href="blog_content.html?aid='+art.id+'" class="detail">查看全文 &gt;&gt;</a>';
                                createHtml+='</div>';
                            }
                        }else{
                            createHtml+='<h3 style="margin-top:20px;margin-left:20px">暂无文章！</h3>';

                        }
                        jQuery("#artListDiv").html(createHtml);
                    }else{
                        alert("抱歉：查询失败"+res.msg);
                    }
                }
            });
        }
        init();
        function doFirst(){
            //判断是否在首页
            if(pindex<=1){
                alert("已经在首页了，不需跳转");

                return false;
            }
            location.href="blog_list.html";

        }

        function doLast(){
            if(pindex>=totalpage){
                alert("已经在末页了，不需跳转");
                return false;
            }
            location.href="blog_list.html?pindex="+(parseInt(totalpage));
        }
        function doBefore(){
            if(pindex<=1){
                alert("已经在首页了，不需跳转");
                return false;
            }
            location.href="blog_list.html?pindex="+(parseInt(pindex-1));
        }
        function doNext(){
            if(pindex>=totalpage){
                alert("已经在末页了，不需跳转");
                return false;
            }
            location.href="blog_list.html?pindex="+(parseInt(pindex+1));
        }
    </script>
</body>
</html>

后端

首先在主页中需要注意的是，我在这里添加了分页功能，如何解决分页问题，诺是将整个数据库里的文章全部读取到内存里，对于内存的消耗极大，所以这里我用sql语言中的 limt 语言进行分页读取（不知道的可以看我Mysql的文章）

通过mapper接口调用数据库

@Mapper
public interface ArticleMapper {
    @Select("select * from articleinfo order by id desc limit #{psize} offset #{offset}")
    List<Articleinfo> getListByPage(@Param("pszie") int pszie,@Param("offset") int offset);
}

通过service层调用mapper接口

@Service
public class ArticleService {
    @Autowired
    private ArticleMapper articleMapper;

    public List<Articleinfo> getListByPage (int psize,int offset){
        return articleMapper.getListByPage(psize, offset);
    } 
}

通过Controller层调用service层方法

@RestController
@RequestMapping("/article")
public class ArticleController {
    @Autowired
    private ArticleService articleService;

    @Resource
    private ThreadPoolTaskExecutor taskExecutor;
    
    public ResultAjax getListByPage(Integer pindex,Integer psize) throws ExecutionException, InterruptedException {
        if (pindex==null||pindex<1){
            pindex=1;
        }
        if (psize==null||psize<1){
            psize=1;
        }
        Integer finalPsize=psize;
        int offset=psize*(pindex-1);
        FutureTask<List<Articleinfo>> listFutureTask=new FutureTask<>(()->{
            return articleService.getListByPage(finalPsize,offset);
        });
        taskExecutor.submit(listFutureTask);
        FutureTask<Integer> sizeTask=new FutureTask<>(()->{
           int count= articleService.getCount(); 
           double sizeTemp=((count*1.0)/(finalPsize*1.0));
           return (int)Math.ceil(sizeTemp);
        });
        taskExecutor.submit(sizeTask);
        
        List<Articleinfo> articleinfos=listFutureTask.get();
        int size=sizeTask.get();
        HashMap<String ,Object> map=new HashMap<>();
        map.put("list",articleinfos);
        map.put("szie",size);
        
        return ResultAjax.success(map);
    }
}

解释：

我在页面中每页所展示两个文章。而 limit finalPsize offset offset 我定位为 finalPsize 为第几行，offset 显示几个数据（具体原则在我的myslq 文章中有体现）（LIMIT [位置偏移量,] 行数）
使用多线程可以避开，有读者写数据，有读者读数据的情况。并且可以以最快速度反应的客户端
这个线程池Spring提供的，线程池，可以不需要去设置参数。
第一个线程池用来查找页面每页的内容，第二个线程池用来查找文章的总数。

个人博客

前端

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>博客列表</title>
    <link rel="stylesheet" href="css/conmmon.css">
    <link rel="stylesheet" href="css/blog_list.css">
    <script src="js/jquery.min.js"></script>
    <script src="js/logout.js"></script>
</head>

<body>

    <!-- 导航栏 -->
    <div class="nav">
        <img src="img/sleep.jpg" alt="">
        <span class="title">我的博客系统</span>
        <!-- 用来占据中间位置 -->
        <span class="spacer"></span>
        <a href="blog_list.html">主页</a>
        <a href="blog_add.html">写博客</a>
        <a href="myblog_list.html">我的博客</a>
        <a href="javascript:logout()">注销</a>
    </div>
     <!-- 版心 -->
     <div class="container">
        <!-- 左侧个人信息 -->
        <div class="container-left">
            <div class="card">
                <img src="img/sleep.jpg" class="avtar" alt="">
                <h3 id="username"></h3>
                <a href="http:www.github.com">github 地址</a>
                <div class="counter">
                    <span>文章</span>
                </div>
                <div class="counter">
                    <span id="artcount"></span>
                </div>
            </div>
        </div>
        <!-- 右侧内容详情 -->
        <div id="artListDiv" class="container-right" >
        </div>
    </div>

    <script>
        function init(){
            jQuery.ajax({
                url:"/article/mylist",
                type:"get",
                data:{},
                success:function(res){
                    if(res.code==200){
                        var creatHtml="";
                        var arrList=res.data.artList;
                        if(res.code==200&&res.data!=null){
                            var user=res.data.user;
                            var size=res.data.size;
                            var art=res.data.artList;
                            if(user!=null){
                                if(user.photo!=""){
                                    jQuery("#photo").att("src",user.photo);
                                }
                                jQuery("#username").html(user.username);
                                jQuery("#artcount").html(size);

                            }else{
                                alert("抱歉查询失败"+res.msg);
                                }
                        }
                        if(arrList!=null&&arrList.length>0){                    
                            for( var i=0;i<arrList.length;i++){
                                var art =arrList[i];
                                creatHtml+='<div class="blog">';
                                creatHtml+='<div class="title">'+art.title+'</div>';
                                creatHtml+='<div class="date">'+art.createtime+'</div>';
                                creatHtml+='<div class="desc">'+ art.content+' </div>';
                                creatHtml+='  <a href="blog_content.html?aid='+art.id+'" class="detail">查看全文 &gt;&gt;</a>&nbsp;&nbsp;';
                                creatHtml+='<a href="blog_edit.html?aid='+art.id+'" class="detail">修改 &gt;&gt;</a>&nbsp;&nbsp;';
                                creatHtml+='<a οnclick="del('+art.id+')" class="detail">删除 &gt;&gt;</a>';
                                creatHtml+=' </div>';
                            }
                        }else{
                            creatHtml+='<h3 style="margin-top:20px;margin-left:20px">暂无文章，请先添加<a href="blog_add.html">添加</a> </h3>';
                        }
                        jQuery("#artListDiv").html(creatHtml);
                    }else{
                        alert("抱歉，操作失败"+res.msg);
                    }
                }
            });
        }
        init();
        function del(aid){
            //1.参数校验
            if(aid=""||aid<=0){
                alert("参数错误！");
                return false;
            }
            jQuery.ajax({
                url:"/art/del",
                type:"post",
                data:{
                    "aid":aid
                },
                success:function(res){
                    if(res.code==200&& res.data==1){
                        alert("恭喜：删除成功");
                        location.href=location.href;
                    }else{
                        alert("删除失败"+res.msg);
                    }
                }
            });
        }
    </script>
</body>

</html>

后端

显示个人文章

调用mapper层控制数据库

@Mapper
public interface ArticleMapper {

    @Select("select * from articleinfo where uid=#{uid}")
    List<Articleinfo> getUidByArticle(@Param("uid") int uid);
}

调用service层调用mapper接口

@Service
public class ArticleService {
    @Autowired
    private ArticleMapper articleMapper;

    
    public List<Articleinfo> getUidByArticle(int uid){
        return articleMapper.getUidByArticle(uid);
    }
}

调用Controller 层调用service层

@RestController
@RequestMapping("/article")
public class ArticleController {
    @Autowired
    private ArticleService articleService;

    @Resource
    private ThreadPoolTaskExecutor taskExecutor;

    @Resource
    private UserinfoVO userinfoVO;
 	 
	@RequestMapping("/mylist")
    public ResultAjax getUidByArticle(HttpServletRequest request){
        Userinfo userinfo= SessionUtis.getUser(request);
        if (userinfo==null){
            return ResultAjax.fail(-1,"请先登录");
        }
        List<Articleinfo> list =articleService.getUidByArticle(userinfo.getUid());
        int size=articleService.getArtCountById(userinfo.getUid());

        if (list!=null&&list.size()>0){
            list.stream().forEach(articleinfo -> {
                if (articleinfo.getContent().length()>120){
                    articleinfo.setContent(articleinfo.getContent().substring(0,120));
                }
            });
        }
        HashMap<String ,Object> map=new HashMap<>();
        map.put("artList",list);
        map.put("user",userinfo);
        map.put("size",size);
        return ResultAjax.success(map);
    }
}

删除文章

调用mapper层控制数据库

@Mapper
public interface ArticleMapper {
    @Delete("delete from articleinfo where aid=#{aid} and uid=#{uid}")
    int delArt(@Param("aid")int aid,@Param("uid") int uid);
}

调用service层调用mapper接口

@Service
public class ArticleService {
    @Autowired
    private ArticleMapper articleMapper;

    
}

Controller层调用service
这个代码太多了我只展示主要代码

@RestController
@RequestMapping("/article")
public class ArticleController {
    @Autowired
    private ArticleService articleService;

    @Resource
    private ThreadPoolTaskExecutor taskExecutor;
	@RequestMapping("/del")
    public ResultAjax delArt(Integer aid,HttpServletRequest request){
        if (aid==null||aid<=0){
            return ResultAjax.fail(-1,"请先登录");
        }
        Userinfo userinfo=SessionUtis.getUser(request);
        int result= articleService.delArt(aid,userinfo.getUid());
        return ResultAjax.success(result);
    }
 }

修改文章

前端

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>博客编辑</title>

    <!-- 引入自己写的样式 -->
    <link rel="stylesheet" href="css/conmmon.css">
    <link rel="stylesheet" href="css/blog_edit.css">

    <!-- 引入 editor.md 的依赖 -->
    <link rel="stylesheet" href="editor.md/css/editormd.min.css" />
    <script src="js/jquery.min.js"></script>
    <script src="js/urluitils.js"></script>
    <script src="editor.md/editormd.js"></script>
</head>

<body>

    <!-- 导航栏 -->
    <div class="nav">
        <img src="img/sleep.jpg" alt="">
        <span class="title">我的博客系统</span>
        <!-- 用来占据中间位置 -->
        <span class="spacer"></span>
        <a href="blog_list.html">主页</a>
        <a href="javascript:logout()">注销</a>
    </div>
    <!-- 编辑框容器 -->
    <div class="blog-edit-container">
        <!-- 标题编辑区 -->
        <div class="title">
            <input type="text" placeholder="在这里写下文章标题" id="title">
            <button onclick="doUpdate()">修改文章</button>
        </div>
        <!-- 创建编辑器标签 -->
        <div id="editorDiv">
            <textarea id="editor-markdown" style="display:none;"></textarea>
        </div>
    </div>

    <script>
        var editor;
        var aid=getParamValue("aid");
        function initEdit(md){
            // 编辑器设置
            editor = editormd("editorDiv", {
                // 这里的尺寸必须在这里设置. 设置样式会被 editormd 自动覆盖掉. 
                width: "100%",
                // 高度 100% 意思是和父元素一样高. 要在父元素的基础上去掉标题编辑区的高度
                height: "calc(100% - 50px)",
                // 编辑器中的初始内容
                markdown: md,
                // 指定 editor.md 依赖的插件路径
                path: "editor.md/lib/",
                saveHTMLToTextarea: true // 
            });
        }
        initEdit("# 在这里写下一篇博客"); // 初始化编译器的值
        // 提交
        function doUpdate(){
            var title=jQuery("#title");
           if(title.val()==""){
                 alert("输入标题");
                 title.focus();
                 return false;
           }
           if(editor.getValue()==""){
             alert("请先输入正文");
             return false;
           }
           jQuery.ajax({
                url:"/article/update",
                type:"post",
                data:{
                    "aid":aid,
                    "title":title.val(),
                    "content":editor.getValue()
                },
                success:function(res){
                    if(res.code==200&&res.data==1){
                        alert("恭喜，修改成功");
                        location.href="myblog_list.html";
                    }else if(res.code==-2){
                        alert("未登录")
                        location.href="login.html";
                    }else{
                        alert("抱歉，修改失败！"+res.msg);
                    }
                }
           });

        }
        //初始化页面
        function init(){
           //校验aid
           if(aid==null||aid<0){
            alert("非法参数");
            return false;
           }
           //查询文章详情
           jQuery.ajax({
                url:"/article/update_init",
                type:"get",
                data:{
                    "aid":aid
                },
                success: function(res){
                    if(res.code==200&&res.data!=null&&res.data.id>0){
                        jQuery("#title").val(res.data.title);
                        initEdit(res.data.content);
                    }else if(res.code==-2){
                        alert("未登录")
                        location.href="login.html";
                    }else{
                        alert("抱歉查询失败"+res.msg);
                    }
                }

           });
           //将文章内容展示到页面
            
        }
        init();
    </script>
</body>

</html>

后端

提取文章

调用mapper层控制数据库

@Mapper
public interface ArticleMapper {
    @Select("select * from articleinfo where aid=#{aid} and uid=#{uid}")
    Articleinfo getArtByaidAnduid(@Param("aid")int aid,@Param("uid") int uid);
}

调用service层调用mapper接口

@Service
public class ArticleService {
    @Autowired
    private ArticleMapper articleMapper;

    public Articleinfo getArtByaidAnduid(int aid,int uid){
        return articleMapper.getArtByaidAnduid(aid,uid);
    }
}

Controller层调用service

@RestController
@RequestMapping("/article")
public class ArticleController {
    @Autowired
    private ArticleService articleService;

    @Resource
    private ThreadPoolTaskExecutor taskExecutor;

    @Resource
    private UserinfoVO userinfoVO;
 	@RequestMapping("/update_init")
    public ResultAjax updataInti(Integer aid,HttpServletRequest request){
        if (aid<=0||aid==null){
            return ResultAjax.fail(-1,"参数有误");

        }
        Userinfo userinfo=SessionUtis.getUser(request);
        if (userinfo==null){
            return ResultAjax.fail(-2,"请先登录");

        }
        Articleinfo articleinfo=articleService.getArtByaidAnduid(aid,userinfo.getUid());
        return ResultAjax.success(articleinfo);
    }
    }

修改文章

调用mapper层控制数据库

@Mapper
public interface ArticleMapper {

    @Update("Update articleinfo set title=#{title},content=#{content} where aid=#{aid} and uid=#{uid}")
    int setArt(Articleinfo articleinfo);
}

调用service层调用mapper接口

@Service
public class ArticleService {
    @Autowired
    private ArticleMapper articleMapper;

    public int setArt(Articleinfo articleinfo){
        return articleMapper.setArt(articleinfo);
    }
}

Controller层调用service

@RestController
@RequestMapping("/article")
public class ArticleController {
    @Autowired
    private ArticleService articleService;

    @Resource
    private ThreadPoolTaskExecutor taskExecutor;

    @Resource
    private UserinfoVO userinfoVO;
    @RequestMapping("/update")
    public ResultAjax setArt(Articleinfo articleinfo,HttpServletRequest request){
        if (articleinfo==null||
                !StringUtils.hasLength(articleinfo.getContent())||
                !StringUtils.hasLength(articleinfo.getTitle())){
            return ResultAjax.fail(-1,"参数非法");
        }
        Userinfo userinfo=SessionUtis.getUser(request);
        if (userinfo==null){
            return ResultAjax.fail(-2,"请先登录");
        }
        articleinfo.setUid(userinfo.getUid());
        int result=articleService.setArt(articleinfo);
        return ResultAjax.success(result);
    }
}

显示正文内容

前端

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>博客正文</title>
    <link rel="stylesheet" href="css/conmmon.css">
    <link rel="stylesheet" href="css/blog_content.css">
    <link rel="stylesheet" href="editor.md/css/editormd.preview.min.css" />
    <script src="js/jquery.min.js"></script>
    <script src="editor.md/editormd.js"></script>
    <script src="editor.md/lib/marked.min.js"></script>
    <script src="editor.md/lib/prettify.min.js"></script>
    <script src="js/urluitils.js"></script>
</head>

<body>

    <!-- 导航栏 -->
    <div class="nav">
        <img src="img/sleep.jpg" alt="">
        <span class="title">我的博客系统</span>
        <!-- 用来占据中间位置 -->
        <span class="spacer"></span>
        <a href="blog_list.html">主页</a>
        <a href="blog_edit.html">写博客</a>
        <a href="myblog_list.html">我的博客</a>
        <a href="login.html">登陆</a>
        <a href="javascript:logout()">注销</a>
    </div>
    <!-- 版心 -->
    <div class="container">
        <!-- 左侧个人信息 -->
        <div class="container-left">
            <div class="card">
                <img src="img/sleep.jpg" class="avtar" id="photo">
                <h3 id="username"></h3>
                <a href="http:www.github.com">github 地址</a>
                <div class="counter">
                    <span>文章</span>
                </div>
                <div class="counter">
                    <span id="artcount"></span>
                </div>
            </div>
        </div>
        <!-- 右侧内容详情 -->
        <div class="container-right">
            <div class="blog-content">
                <!-- 博客标题 -->
                <h3 id="title"></h3>
                <!-- 博客时间 -->
                <div class="date" >
                   发布时间： <span id="createtime"></span>
                        |               
                   阅读量： <span id="rcount"></span>
                </div>
                <!-- 博客正文 -->
                <div id="editorDiv">

                </div>
            </div>
        </div>
    </div>
    <script type="text/javascript">
            var aid=getParamValue("aid");
            var editormd;
            function initEdit(md){
                editormd = editormd.markdownToHTML("editorDiv", {
                markdown : md, 
                });
            }
            //初始化页面
            function init(){
          
                if(aid==null||aid<=0){
                    alert("参数有误");
                    return false;
                }
                jQuery.ajax({
                    url:"/article/detail",
                    type:"get",
                    data:{
                        "aid":aid
                    },
                    success:function(res){
                        if(res.code==200&&res.data!=null){
                            var user=res.data.user;
                            var art=res.data.art;
                            if(user!=null){
                                if(user.photo!=""){
                                    jQuery("#photo").att("src",user.photo);
                                }
                                jQuery("#username").html(user.username);
                                jQuery("#artcount").html(user.artCoout);

                            }else{
                                alert("抱歉查询失败"+res.msg);
                            }
                            if(art!=null){
                                jQuery("#title").html(art.title);
                                jQuery("#createtime").html(art.createtime);
                                jQuery("#rcount").html(art.rcount);
                                initEdit(art.content);
                            }else{
                                alert("抱歉查询失败"+res.msg);
                            }
                        }else{
                            alert("抱歉查询失败"+res.msg);
                        }
                    }
                });
            }
            init();

            function incrementRCount(){
                if (aid==null||aid<=0) {
                        return false;
                 }
                jQuery.ajax({
                    
                    url:"/article/increment_rcount",
                    type:"post",
                    data:{
                        "aid":aid
                    },
                    success:function(res){

                    }
                })
            }
            incrementRCount();
    </script> 
</body>

</html>

后端

调用mapper层控制数据库
UserMapper

@Mapper
public interface UserMapper {

    @Select("select * from userinfo where uid=#{uid}")
    UserinfoVO getUserById(@Param("uid")int uid);
}

ArticleMapper

@Mapper
public interface ArticleMapper {

    @Update("Update articleinfo set title=#{title},content=#{content} where aid=#{aid} and uid=#{uid}")
    int setArt(Articleinfo articleinfo);

    @Select("select * from articleinfo where aid=#{aid}")
    Articleinfo readDetail(@Param("aid")int aid);

}

调用service层调用mapper接口
UserServie

@Service
public class UserService {
    @Autowired
    private UserMapper userMapper;

    public UserinfoVO getUserByUid(int uid){
        return userMapper.getUserById(uid);
    }
}

ArticleService

@Service
public class ArticleService {
    @Autowired
    private ArticleMapper articleMapper;

    public Articleinfo readDetail(int aid){
        return articleMapper.readDetail(aid);
    }
}

Controller层调用service

ArticleController

@RestController
@RequestMapping("/article")
public class ArticleController {
    @Autowired
    private ArticleService articleService;

    @Resource
    private ThreadPoolTaskExecutor taskExecutor;

    @Resource
    private UserService userService;
    @Resource
    private UserinfoVO userinfoVO;
	@RequestMapping("/detail")
    public ResultAjax readDetail(Integer aid) throws ExecutionException, InterruptedException {
        if (aid<=0||aid==null){
            return ResultAjax.fail(-1,"非法参数");
        }
        Articleinfo articleinfo=articleService.readDetail(aid);
        if (articleinfo==null){
            return ResultAjax.fail(-1,"非法参数");
        }
        FutureTask<UserinfoVO> userTask=new FutureTask<>(()->{
            return  userService.getUserByUid(articleinfo.getUid());
        });
        taskExecutor.submit(userTask);

        FutureTask<Integer> artCountTask=new FutureTask<>(()->{
            return articleService.getArtCountById(articleinfo.getUid());
        });
        taskExecutor.submit(artCountTask);
        UserinfoVO userinfoVO=userTask.get();
        int artCount=artCountTask.get();
        userinfoVO.setArtCount(artCount);
        HashMap<String,Object> map=new HashMap<>();
        map.put("user",userinfoVO);
        map.put("art",articleinfo);
        return ResultAjax.success(map);
    }
}

文章阅读量功能

调用mapper层控制数据库

@Mapper
public interface ArticleMapper {

    @Update("upate articleinfo set readcount=readcount+1 where aid=#{aid}")
    int readArtCount(@Param("aid")int aid);

}

调用service层调用mapper接口

@Service
public class ArticleService {
    @Autowired
    private ArticleMapper articleMapper;

    public int readArtCount(int aid){
        return articleMapper.readArtCount(aid);
    }
}

Controller层调用service

@RestController
@RequestMapping("/article")
public class ArticleController {
    @Autowired
    private ArticleService articleService;

    @Resource
    private ThreadPoolTaskExecutor taskExecutor;

    @Resource
    private UserService userService;
    @Resource
    private UserinfoVO userinfoVO;
 	 @RequestMapping("/increment_rcount")
    public ResultAjax readArtCount(Integer aid){
        if (aid==null||aid<=0){
            return ResultAjax.fail(-1,"参数有误");
        }
        int result = articleService.readArtCount(aid);

        return ResultAjax.success(result);
    }
}

添加文章

前端

<!DOCTYPE html>
<html lang="en">

<head>

    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>博客编辑</title>

    <!-- 引入自己写的样式 -->
    <link rel="stylesheet" href="css/conmmon.css">
    <link rel="stylesheet" href="css/blog_edit.css">

    <!-- 引入 editor.md 的依赖 -->
    <link rel="stylesheet" href="editor.md/css/editormd.min.css" />
    <script src="js/jquery.min.js"></script>
    <script src="editor.md/editormd.js"></script>
</head>

<body>
    <!-- 导航栏 -->
    <div class="nav">
        <img src="img/sleep.jpg" alt="">
        <span class="title">我的博客系统</span>
        <!-- 用来占据中间位置 -->
        <span class="spacer"></span>
        <a href="blog_list.html">主页</a>
        <a href="myblog_list.html">我的博客</a>
        <a href="javascript:logout()">注销</a>
    </div>
    <!-- 编辑框容器 -->
    <div class="blog-edit-container">
        <!-- 标题编辑区 -->
        <div class="title" >
            <input type="text" placeholder="在这里写下文章标题" id="title">
            <button onclick="mysub()"  >发布文章</button>
        </div>
        <!-- 创建编辑器标签 -->
        <div id="editor">
            <textarea id="editor-markdown" style="display:none;"></textarea>
        </div>
    </div>
    
    <script>
        var editor;
        function initEdit(md){
            // 编辑器设置
            editor = editormd("editor", {
                // 这里的尺寸必须在这里设置. 设置样式会被 editormd 自动覆盖掉. 
                width: "100%",
                // 高度 100% 意思是和父元素一样高. 要在父元素的基础上去掉标题编辑区的高度
                height: "calc(100% - 50px)",
                // 编辑器中的初始内容
                markdown: md,
                // 指定 editor.md 依赖的插件路径
                path: "editor.md/lib/",
                saveHTMLToTextarea: true // 
            });
        }
        initEdit("# 在这里写下一篇博客"); // 初始化编译器的值
        // 提交
        function mysub(){
           //非空校验
           var title=jQuery("#title");
           if(title.val()==""){
                 alert("输入标题");
                 title.focus();
                 return false;
           }
           if(editor.getValue()==""){
             alert("请先输入正文");
             return false;
           }
           //将用户提交的数据传递给后端
           jQuery.ajax({
                url:"/article/add",
                type:"post",
                data:{
                    "title":title.val(),
                    "content":editor.getValue()
                },
                success:function(res){
                    if(res.code==200&&res.data==1){
                            if(confirm("恭喜:添加成功，是否继续添加文章")){
                                Location.href=Location.href;
                            }else{
                                location.href="myblog_list.html";
                            }
                    }else{
                        alert("抱歉：操作失败"+res.msg); 
                    }
                }
           });
           //将返回的数据展现给用户
        }
    </script>
</body>

</html>

后端

mapper

    @Insert("insert into articleinfo(title,content,uid) values(#{title},#{content},#{uid})")
    int add(Articleinfo articleinfo);

Service

    public int add(Articleinfo articleinfo) {
        return articleMapper.add(articleinfo);
    }

Controller

	 @RequestMapping("/add")
    public ResultAjax add(Articleinfo articleinfo,HttpServletRequest request){
        if (articleinfo==null||!StringUtils.hasLength(articleinfo.getTitle())||
        !StringUtils.hasLength(articleinfo.getContent())){
            return ResultAjax.fail(-1,"非法参数");
        }
        Userinfo userinfo=SessionUtis.getUser(request);
        if (userinfo==null){
            return ResultAjax.fail(-2,"请先登录");

        }
        articleinfo.setUid(userinfo.getUid());
        int result=articleService.add(articleinfo);
        return ResultAjax.success(result);
    }

补充一点：

如何使用Redis

在这里插入图片描述
具体详情可以看我的Redis哪一章文章链接

你会发现启动的并没有成功。原因我这里留了一个坑，关于拦截器的。

@Configuration
public class MyConfig implements WebMvcConfigurer {
    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        registry.addInterceptor(new LoginIntercpet())
                .addPathPatterns("/**")
                .excludePathPatterns("/css/*")
                .excludePathPatterns("/js/*")
                .excludePathPatterns("/css")
                .excludePathPatterns("/img/*")
                .excludePathPatterns("/reg.html")
                .excludePathPatterns("/blog_list.html")
                .excludePathPatterns("/article/detail")
                .excludePathPatterns("/article/getlistbypage")
                .excludePathPatterns("/user/reg")
                .excludePathPatterns("/user/login")
                .excludePathPatterns("/editor.md/*")
                .excludePathPatterns("/blog_content.html")
                .excludePathPatterns("/login.html");
    }
}

第二个启动这里要添加mapper映射否则会失败
在这里插入图片描述

@SpringBootApplication
@MapperScan("com.example.myblog.mapper")
public class MyblogApplication {

    public static void main(String[] args) {
        SpringApplication.run(MyblogApplication.class, args);
    }

}