Spring Boot 个人博客实训日志08

实训-个人博客（后台登录）
在进行后台登录之前我们先在我们数据库的t_user表中输入一条记录，用于我们来进行后台的登录。
这里的密码是进行了MD5加密之后的了，如果还没有进行到MD5的可以写自己的密码，如：111111。
在这里插入图片描述
一，构建登录页面和后台管理首页
1，login.html登录页面
在admin文件夹下新建一个login.html页面，这个是登录的页面。

效果展示

login.html当前实现的全部的代码,在这里做的登录的检验。

<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.w3.org/1999/xhtml">
<head th:replace="admin/_fragments :: head(~{::title})">
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>博客管理登录</title>
  <link rel="stylesheet" href="https://cdn.jsdelivr.net/semantic-ui/2.2.4/semantic.min.css">
  <link rel="stylesheet" href="../../static/css/me.css">
</head>
<body>

<br>
<br>
<br>
 <div class="m-container-small m-padded-tb-massive" style="max-width: 30em !important;">
   <div class="ur container">
     <div class="ui middle aligned center aligned grid">
       <div class="column">
         <h2 class="ui teal image header">
           <div class="content">
             管理后台登录
           </div>
         </h2>
         <form class="ui large form" method="post" action="#" th:action="@{/admin/login}">
           <div class="ui  segment">
             <div class="field">
               <div class="ui left icon input">
                 <i class="user icon"></i>
                 <input type="text" name="username" placeholder="用户名">
               </div>
             </div>
             <div class="field">
               <div class="ui left icon input">
                 <i class="lock icon"></i>
                 <input type="password" name="password" placeholder="密码">
               </div>
             </div>
             <button class="ui fluid large teal submit button">登   录</button>
           </div>

           <div class="ui error mini message"></div>
           <div class="ui mini negative message" th:unless="${#strings.isEmpty(message)}" th:text="${message}">用户名和密码错误</div>

         </form>

       </div>
     </div>
   </div>
 </div>

<!--/*/<th:block th:replace="_fragments :: script">/*/-->
<script src="https://cdn.jsdelivr.net/npm/jquery@3.2/dist/jquery.min.js"></script>
<script src="https://cdn.jsdelivr.net/semantic-ui/2.2.4/semantic.min.js"></script>
<!--/*/</th:block>/*/-->

<script>
  $('.ui.form').form({
    fields : {
      username : {
        identifier: 'username',
        rules: [{
          type : 'empty',
          prompt: '请输入用户名'
        }]
      },
      password : {
        identifier: 'password',
        rules: [{
          type : 'empty',
          prompt: '请输入密码'
        }]
      }
    }
  });
</script>

</body>
</html>

2，_fragments.html页面
在admin文件夹下新建一个_fragments.html页面用来后台用。
在这里插入图片描述
所有代码


<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.w3.org/1999/xhtml">
<head th:fragment="head(title)">
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title th:replace="${title}">博客详情</title>
  <link rel="stylesheet" href="https://cdn.jsdelivr.net/semantic-ui/2.2.4/semantic.min.css">  <link rel="stylesheet" type="text/css" href="../static/css/typo.css" th:href="@{/css/typo.css}">
  <link rel="stylesheet" type="text/css" href="../static/css/animate.css" th:href="@{/css/animate.css}">
  <link rel="stylesheet" type="text/css" href="../static/lib/prism/prism.css" th:href="@{/lib/prism/prism.css}">
  <link rel="stylesheet" type="text/css" href="../static/lib/tocbot/tocbot.css" th:href="@{/lib/tocbot/tocbot.css}">
  <link rel="stylesheet" type="text/css" href="../static/css/me.css" th:href="@{/css/me.css}">
</head>
<body>


<!--导航-->
<nav th:fragment="menu(n)" class="ui inverted attached segment m-padded-tb-mini m-shadow-small" >
  <div class="ui container">
    <div class="ui inverted secondary stackable menu">
      <h2 class="ui teal header item">管理后台</h2>
      <a href="#" class="active m-item item m-mobile-hide" th:classappend="${n==1} ? 'active'"><i class="mini home icon"></i>博客</a>
      <a href="#" class=" m-item item m-mobile-hide" th:classappend="${n==2} ? 'active'"><i class="mini idea icon"></i>分类</a>
      <a href="#" class="m-item item m-mobile-hide" th:classappend="${n==3} ? 'active'"><i class="mini tags icon"></i>标签</a>
      <div class="right m-item m-mobile-hide menu">
        <div class="ui dropdown  item">
          <div class="text">
            <img class="ui avatar image" src="https://unsplash.it/100/100?image=1005">
            李仁密
          </div>
          <i class="dropdown icon"></i>
          <div class="menu">
            <a  th:href="@{/admin/logout}" class="item">注销</a>
          </div>
        </div>
      </div>
    </div>
  </div>
  <a href="#" class="ui menu toggle black icon button m-right-top m-mobile-show">
    <i class="sidebar icon"></i>
  </a>
</nav>



<!--底部footer-->
<footer th:fragment="footer" class="ui inverted vertical segment m-padded-tb-massive">
  <div class="ui center aligned container">
    <div class="ui inverted divided stackable grid">
      <div class="three wide column">
        <div class="ui inverted link list">
          <div class="item">
            <img src="../static/images/wechat.jpg" th:src="@{/images/wechat.jpg}"  class="ui rounded image" alt="" style="width: 110px">
          </div>
        </div>
      </div>
      <div class="three wide column" >
        <h4 class="ui inverted header m-text-thin m-text-spaced " >最新博客</h4>
        <div id="newblog-container">
          <div class="ui inverted link list" th:fragment="newblogList">
            <a href="#" th:href="@{/blog/{id}(id=${blog.id})}" target="_blank" class="item m-text-thin" th:each="blog : ${newblogs}" th:text="${blog.title}">用户故事（User Story）</a>
            <!--/*-->
            <a href="#" class="item m-text-thin">用户故事（User Story）</a>
            <a href="#" class="item m-text-thin">用户故事（User Story）</a>
            <!--*/-->
          </div>
        </div>
      </div>
      <div class="three wide column">
        <h4 class="ui inverted header m-text-thin m-text-spaced ">联系我</h4>
        <div class="ui inverted link list">
          <a href="#" class="item m-text-thin" th:text="#{index.email}">Email：lirenmi@163.com</a>
          <a href="#" class="item m-text-thin" th:text="#{index.qq}">QQ：865729312</a>
        </div>
      </div>
      <div class="seven wide column">
        <h4 class="ui inverted header m-text-thin m-text-spaced ">Blog</h4>
        <p class="m-text-thin m-text-spaced m-opacity-mini" th:text="#{index.blogDescription}">这是我的个人博客、会分享关于编程、写作、思考相关的任何内容，希望可以给来到这儿的人有所帮助...</p>
      </div>
    </div>
    <div class="ui inverted section divider"></div>
    <p class="m-text-thin m-text-spaced m-opacity-tiny">Copyright © 2016 - <span th:text="${#dates.year(#dates.createNow())}">2017</span> Lirenmi Designed by Lirenmi</p>
  </div>

</footer>

<th:block th:fragment="script">
  <script src="https://cdn.jsdelivr.net/npm/jquery@3.2/dist/jquery.min.js"></script>
  <script src="https://cdn.jsdelivr.net/semantic-ui/2.2.4/semantic.min.js"></script>
  <script src="../static/lib/scroll/jquery.scrollTo.min.js" th:src="@{/lib/scroll/jquery.scrollTo.min.js}"></script>
  <script src="../static/lib/prism/prism.js" th:src="@{/lib/prism/prism.js}"></script>
  <script src="../static/lib/tocbot/tocbot.min.js" th:src="@{/lib/tocbot/tocbot.min.js}"></script>
  <script src="../static/lib/qrcode/qrcode.min.js" th:src="@{/lib/qrcode/qrcode.min.js}"></script>
  <script src="../static/lib/waypoints/jquery.waypoints.min.js" th:src="@{/lib/waypoints/jquery.waypoints.min.js}"></script>
  <script>
    $('#newblog-container').load(/*[[@{/footer/newblog}]]*/"/footer/newblog");
  </script>
</th:block>

</body>
</html>

3，index.html后台管理首页
在admin文件夹下新建一个index.html页面，这个页面就是登录后的首页面了。
在这里插入图片描述
效果展示

代码

<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.w3.org/1999/xhtml">
<head th:replace="admin/_fragments :: head(~{::title})">
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>博客管理</title>
  <link rel="stylesheet" href="https://cdn.jsdelivr.net/semantic-ui/2.2.4/semantic.min.css">
  <link rel="stylesheet" href="../../static/css/me.css">
</head>
<body>

  <!--导航-->
  <nav th:replace="admin/_fragments :: menu(0)" class="ui inverted attached segment m-padded-tb-mini m-shadow-small" >
    <div class="ui container">
      <div class="ui inverted secondary stackable menu">
        <h2 class="ui teal header item">管理后台</h2>
        <a href="#" class="active m-item item m-mobile-hide"><i class="mini home icon"></i>博客</a>
        <a href="#" class=" m-item item m-mobile-hide"><i class="mini idea icon"></i>分类</a>
        <a href="#" class="m-item item m-mobile-hide"><i class="mini tags icon"></i>标签</a>
        <div class="right m-item m-mobile-hide menu">
          <div class="ui dropdown  item">
            <div class="text">
              <img class="ui avatar image" src="https://unsplash.it/100/100?image=1005">
              哈哈
            </div>
            <i class="dropdown icon"></i>
            <div class="menu">
              <a href="#" th:href="@{/admin/logout}" class="item">注销</a>
            </div>
          </div>
        </div>
      </div>
    </div>
    <a href="#" class="ui menu toggle black icon button m-right-top m-mobile-show">
      <i class="sidebar icon"></i>
    </a>
  </nav>


  <!--中间内容-->
  <div  class="m-container-small m-padded-tb-big">
    <div class="ui container">
      <div class="ui success large  message">
        <h3>Hi,</h3>
        <p>你好，欢迎登录！</p>
      </div>

      <img src="https://unsplash.it/1000/400?image=15" alt="" class="ui rounded bordered fluid image">
    </div>
  </div>

  <br>
  <br>

  <!--底部footer-->
  <footer th:replace="admin/_fragments :: footer" class="ui inverted vertical segment m-padded-tb-massive">
    <div class="ui center aligned container">
      <div class="ui inverted divided stackable grid">
        <div class="three wide column">
          <div class="ui inverted link list">
            <div class="item">
              <img src="../../static/images/wechat.jpg" class="ui rounded image" alt="" style="width: 110px">
            </div>
          </div>
        </div>
        <div class="three wide column">
          <h4 class="ui inverted header m-text-thin m-text-spaced " >最新博客</h4>
          <div class="ui inverted link list">
            <a href="#" class="item m-text-thin">用户故事（User Story）</a>
            <a href="#" class="item m-text-thin">用户故事（User Story）</a>
            <a href="#" class="item m-text-thin">用户故事（User Story）</a>
          </div>
        </div>
        <div class="three wide column">
          <h4 class="ui inverted header m-text-thin m-text-spaced ">联系我</h4>
          <div class="ui inverted link list">
            <a href="#" class="item m-text-thin">Email：2410845853@qq.com</a>
            <a href="#" class="item m-text-thin">QQ：2410845853</a>
          </div>
        </div>
        <div class="seven wide column">
          <h4 class="ui inverted header m-text-thin m-text-spaced ">Blog</h4>
          <p class="m-text-thin m-text-spaced m-opacity-mini">这是我的个人博客、会分享关于编程、写作、思考相关的任何内容，希望可以给来到这儿的人有所帮助...</p>
        </div>
      </div>
      <div class="ui inverted section divider"></div>
      <p class="m-text-thin m-text-spaced m-opacity-tiny">Copyright © 2016 - 2017 Lirenmi Designed by Lirenmi</p>
    </div>

  </footer>
  <!--/*/<th:block th:replace="_fragments :: script">/*/-->
  <script src="https://cdn.jsdelivr.net/npm/jquery@3.2/dist/jquery.min.js"></script>
  <script src="https://cdn.jsdelivr.net/semantic-ui/2.2.4/semantic.min.js"></script>
  <!--/*/</th:block>/*/-->
  <script>
    $('.menu.toggle').click(function () {
      $('.m-item').toggleClass('m-mobile-hide');
    });

    $('.ui.dropdown').dropdown({
      on : 'hover'
    });

  </script>
</body>
</html>

二，UserService和UserServicelmpl
在com.lrm下新建一个文件夹service，在service文件夹中新建UserService接口和UserServicelmpl实现接口类
在这里插入图片描述

在com.lrm下新建一个文件夹dao，在dao文件夹中新建UserRepository接口用于与数据库相连接。

三、LoginController实现登录
在com.lrm.web下新建一个文件夹admin，在admin文件夹中新建LoginController登录控制器和BlogController blogs控制器。
在这里插入图片描述
LoginController.java代码

package com.lrm.web.admin;

import com.lrm.po.User;
import com.lrm.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import javax.servlet.http.HttpSession;


@Controller
@RequestMapping("/admin")
public class LoginController {


    @Autowired
    private UserService userService;

    @GetMapping
    public String loginPage() {
        return "admin/login";
    }


    @PostMapping("/login")
    public String login(@RequestParam String username,
                        @RequestParam String password,
                        HttpSession session,
                        RedirectAttributes attributes) {
        User user = userService.checkUser(username, password);
        if (user != null) {
            user.setPassword(null);
            session.setAttribute("user",user);
            return "admin/index";
        } else {
            attributes.addFlashAttribute("message", "用户名和密码错误");
            return "redirect:/admin";
        }
    }

    @GetMapping("/logout")
    public String logout(HttpSession session) {
        session.removeAttribute("user");
        return "redirect:/admin";
    }
}

BlogController

这个控制器是为了不让其他的人能直接通过输入url就可以访问我们的blogs.html页面。

package com.lrm.web.admin;

import com.lrm.po.Blog;
import com.lrm.po.Type;
import com.lrm.po.User;
import com.lrm.service.BlogService;
import com.lrm.service.TagService;
import com.lrm.service.TypeService;
import com.lrm.vo.BlogQuery;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Pageable;
import org.springframework.data.domain.Sort;
import org.springframework.data.web.PageableDefault;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import javax.servlet.http.HttpSession;


@Controller
@RequestMapping("/admin")
public class BlogController {

    private static final String INPUT = "admin/blogs-input";
    private static final String LIST = "admin/blogs";
    private static final String REDIRECT_LIST = "redirect:/admin/blogs";


    @Autowired
    private BlogService blogService;
    @Autowired
    private TypeService typeService;
    @Autowired
    private TagService tagService;

    @GetMapping("/blogs")
    public String blogs(@PageableDefault(size = 8, sort = {"updateTime"}, direction = Sort.Direction.DESC) Pageable pageable,
                        BlogQuery blog, Model model) {
        model.addAttribute("types", typeService.listType());
        model.addAttribute("page", blogService.listBlog(pageable, blog));
        return LIST;
    }

    @PostMapping("/blogs/search")
    public String search(@PageableDefault(size = 8, sort = {"updateTime"}, direction = Sort.Direction.DESC) Pageable pageable,
                         BlogQuery blog, Model model) {
        model.addAttribute("page", blogService.listBlog(pageable, blog));
        return "admin/blogs :: blogList";
    }


    @GetMapping("/blogs/input")
    public String input(Model model) {
        setTypeAndTag(model);
        model.addAttribute("blog", new Blog());
        return INPUT;
    }

    private void setTypeAndTag(Model model) {
        model.addAttribute("types", typeService.listType());
        model.addAttribute("tags", tagService.listTag());
    }


    @GetMapping("/blogs/{id}/input")
    public String editInput(@PathVariable Long id, Model model) {
        setTypeAndTag(model);
        Blog blog = blogService.getBlog(id);
        blog.init();
        model.addAttribute("blog",blog);
        return INPUT;
    }



    @PostMapping("/blogs")
    public String post(Blog blog, RedirectAttributes attributes, HttpSession session) {
        blog.setUser((User) session.getAttribute("user"));
        blog.setType(typeService.getType(blog.getType().getId()));
        blog.setTags(tagService.listTag(blog.getTagIds()));
        Blog b;
        if (blog.getId() == null) {
            b =  blogService.saveBlog(blog);
        } else {
            b = blogService.updateBlog(blog.getId(), blog);
        }

        if (b == null ) {
            attributes.addFlashAttribute("message", "操作失败");
        } else {
            attributes.addFlashAttribute("message", "操作成功");
        }
        return REDIRECT_LIST;
    }


    @GetMapping("/blogs/{id}/delete")
    public String delete(@PathVariable Long id,RedirectAttributes attributes) {
        blogService.deleteBlog(id);
        attributes.addFlashAttribute("message", "删除成功");
        return REDIRECT_LIST;
    }



}

四、MD5加密
在net.zl.myblog下新建一个文件夹util，在util文件夹中新建MD5Utils用于加密的类
在这里插入图片描述

package com.lrm.util;

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;


public class MD5Utils {

    /**
     * MD5加密类
     * @param str 要加密的字符串
     * @return    加密后的字符串
     */
    public static String code(String str){
        try {
            MessageDigest md = MessageDigest.getInstance("MD5");
            md.update(str.getBytes());
            byte[]byteDigest = md.digest();
            int i;
            StringBuffer buf = new StringBuffer("");
            for (int offset = 0; offset < byteDigest.length; offset++) {
                i = byteDigest[offset];
                if (i < 0)
                    i += 256;
                if (i < 16)
                    buf.append("0");
                buf.append(Integer.toHexString(i));
            }
            //32位加密
            return buf.toString();
            // 16位的加密
            //return buf.toString().substring(8, 24);
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
            return null;
        }

    }


    public static void main(String[] args) {
        System.out.println(code("111111"));
    }
}

五、登录拦截器
在这里插入图片描述

package com.lrm.interceptor;

import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;


@Configuration
public class WebConfig extends WebMvcConfigurerAdapter {

    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        registry.addInterceptor(new LoginInterceptor())
                .addPathPatterns("/admin/**")
                .excludePathPatterns("/admin")
                .excludePathPatterns("/admin/login");
    }
}

在这里插入图片描述

原文链接：https://blog.csdn.net/asdhkjdk_/article/details/118480548