這裡寫目錄标題
-
- 效果展示
- 參考目錄
LoginController
@Controller
public class LoginController {
@PostMapping("/user/login")
public String login(@RequestParam("username") String username,
@RequestParam("password")String password,
Model model, HttpSession session){
//具體業務
if(!StringUtils.isEmpty(username) && "123456".equals(password)){
session.setAttribute("loginUser",username);
return "redirect:/main.html";
}else {
//告訴使用者，你登入失敗了
model.addAttribute("msg","使用者名或密碼錯誤");
return "index";
}
}
}
攔截器
public class LoginHandlerInterceptor implements HandlerInterceptor {
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
//登入成功之後，應該有使用者的Session
Object loginUser = request.getSession().getAttribute("loginUser");
if (loginUser==null){ //沒有登入
request.setAttribute("msg","沒有權限，請先登入");
request.getRequestDispatcher("/index.html").forward(request,response);
return false;
}else{
return true;
}
}
MyMvcConfig
@Configuration
public class MyMvcConfig implements WebMvcConfigurer {
@Override
public void addViewControllers(ViewControllerRegistry registry){
registry.addViewController("/").setViewName("index");
registry.addViewController("/index.html").setViewName("index");
registry.addViewController("/main.html").setViewName("dashboard");
}
@Override
public void addInterceptors(InterceptorRegistry registry) {
registry.addInterceptor(new LoginHandlerInterceptor()) //添加 攔截器
// 添加 過濾規則，全部過濾。登入請求、登入界面、靜态資源，排除過濾
.addPathPatterns("/**").excludePathPatterns("/index.html","/","/user/login","/static/**");
}
// @Bean //國際化
// public LocaleResolver localeResolver(){
// return new MyLocaleResolver();
// }
}
index.html 登入頁面
<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<form action="/user/login" method="post">
<h3 th:text="#{login.tip}" >Please Sign in</h3>
<p th:text="${msg}"></p>
<input name="username" type="text" th:placeholder="#{login.username}" > <br>
<input name="password" type="password" th:placeholder="#{login.password}"> <br>
<input type="checkbox" value="rember-me">[[#{login.remeber}]] <br>
<button type="submit" th:text="#{login.btn}" > Sign in</button> <br>
<a th:href="@{/index.html(token punctuation">'zh_CN')}" >中文</a>
<a th:href="@{/index.html(token punctuation">'en_US')}">English</a>
</form>
</body>
</html>
dashboard.html 主界面
<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<h2 th:text="${session.loginUser}"></h2>
</body>
</html>
效果展示
參考目錄
B站 狂神
https://www.bilibili.com/video/BV1PE411i7CV?p=4
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