springboot进阶-blog-day02
1.thymeleaf模板引擎使用
首先引入maven依赖
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
然后讲前端文件放在resources文件下。
static文件放置css、js、image等文件
templates放置html文件
然后运行项目时会发现找不到本地的css、js、图片等文件
方法是：
公共文件可以新建一个_fragments.html来替换html中的内容
fragments.html:
<!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="${title}">博客详情</title>
<link rel="stylesheet" href="https://cdn.jsdelivr.net/semantic-ui/2.2.4/semantic.min.css">
<link rel="stylesheet" href="../static/css/typo.css" th:href="@{/css/typo.css}">
<link rel="stylesheet" href="../static/css/animate.css" th:href="@{/css/animate.css}">
<link rel="stylesheet" href="../static/lib/prism/prism.css" th:href="@{/lib/prism/prism.css}">
<link rel="stylesheet" href="../static/lib/tocbot/tocbot.css" th:href="@{/lib/tocbot/tocbot.css}">
<link rel="stylesheet" href="../static/css/me.css" th:href="@{/css/main.css}">
</head>
<body>
<!--导航-->
<nav th:fragment="menu(n)" class="ui inverted attached segment m-padded-tb-mini m-shadow-small" >
<div class="ui container">
<div class="ui inverted secondary stackable menu">
<h2 class="ui teal header item">管理后台</h2>
<a href="#" class="active m-item item m-mobile-hide" th:classappend="${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="http://pic2.zhimg.com/50/v2-fb824dbb6578831f7b5d92accdae753a_hd.jpg">
李仁密
</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>
<!--导航-->
<!--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="http://pic1.zhimg.com/50/v2-ede9473ddcbd84fe7c1e363953ed7410_hd.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：jm0123@qq.com</a>
<a href="#" class="item m-text-thin">QQ：991888239</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:fragment="script">
<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/jquery.min.js"></script>
<script src="https://cdn.jsdelivr.net/semantic-ui/2.2.4/semantic.min.js"></script>
<script src="//cdn.jsdelivr.net/npm/[email protected]/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>
</th:block>
</body>
</html>
然后再去html文件中去引入_fargments文件
将之前的head标签改为这样就引入了css文件并且会使用当前html的titile标签
引入js的方法是：
<!--/*//*/ -->
<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/jquery.min.js"></script>
<script src="https://cdn.jsdelivr.net/semantic-ui/2.2.4/semantic.min.js"></script>
<script src="//cdn.jsdelivr.net/npm/[email protected]/jquery.scrollTo.min.js"></script>
<script src="../static/lib/prism/prism.js"></script>
<script src="../static/lib/tocbot/tocbot.min.js"></script>
<script src="../static/lib/qrcode/qrcode.min.js"></script>
<script src="../static/lib/waypoints/jquery.waypoints.min.js"></script>
<!--/*//*/-->
也就是说在原有js的基础上添加
<!--/*//*/ -->
<!--/*//*/-->
当然提交路径和超链接路径也要使用th
2.创建数据库
在创建数据库时可以直接新建文件让sprintboot去实现创建。
新建po层的包：
需要在类前面加上注解来声明表的名称
@Entity
@Table(name = "t_blog")
在主键id前加上@Id注解；并且加上@GeneratedValue
使用ManyToOne、ManyToMany、OneToOne等注解来建立关系。需要在被动的那个上面声明根据那一个来改变
在创建时间字段时需要声明时间字段的生成方式：
然后运行即可生成。
3.登录
实现登录方法：
先编写dao层：
public interface UserRepository extends JpaRepository<User,Long> {
User findByUsernameAndPassword(String username,String password);
}
然后是service层：
public interface UserService {
User checkUser(String username,String password);
}
service的实现类：
@Service
public class UserServiceImpl implements UserService {
@Autowired
private UserRepository repository;
@Override
public User checkUser(String username, String password) {
User user = repository.findByUsernameAndPassword(username,MD5Utils.code(password));
return user;
}
}
controller:
@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","用户名或密码错误");
return "redirect:/admin";
}
}
@GetMapping("/logout")
public String logout(HttpSession session){
session.removeAttribute("user");
return "redirect:/admin";
}
}
4.拦截器
为了防治外人登录服务器使用拦截器来拦截。
新建intercoptor包
登录拦截器：
public class LoginIntercopter extends HandlerInterceptorAdapter {
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
if (request.getSession().getAttribute("user") == null){
response.sendRedirect("/admin");
return false;
}
return true;
}
}
拦截器配置文件
@Configuration
public class WebConfig implements WebMvcConfigurer {
@Override
public void addInterceptors(InterceptorRegistry registry) {
registry.addInterceptor(new LoginIntercopter())
.addPathPatterns("/admin/**")
.excludePathPatterns("/admin")
.excludePathPatterns("/admin/login");
}
}
本文是在B站看视频所总结，如有错误感谢指正。