github项目地址https://github.com/H-Designer/SpringBoot
这一节要总结的是：国际化语言设定，以及拦截器的设定
上一节总结的是：项目跟路径设定、项目首址设定（https://www.cnblogs.com/zhaochunhui/p/11331803.html）
##4、根据国际化的设置：
在application.properties中进行设置国际化语言的存放地址
spring.messages.basename=i18n.login
然后在resources中进行设置
进行中英文的设定
<!DOCTYPE html> <html lang="en" xmlns:th="http://www.thymeleaf.org"> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no"> <meta name="description" content=""> <meta name="author" content=""> <title>Signin Template for Bootstrap</title> <!-- Bootstrap core CSS --> <link th:href="@{asserts/css/bootstrap.min.css}" rel="stylesheet"> <!--<link href="asserts/css/bootstrap.min.css" rel="stylesheet">--> <!-- Custom styles for this template --> <!--<link href="asserts/css/signin.css" rel="stylesheet">--> <link th:href="@{asserts/css/signin.css}" rel="stylesheet"> </head> <body class="text-center"> <form class="form-signin" th:action="@{/user/login}" action="dashboard.html" th:method="post"> <img class="mb-4" th:src="@{asserts/img/bootstrap-solid.svg}" alt="" width="72" height="72"> <h1 class="h3 mb-3 font-weight-normal" th:text="#{login.tip}"></h1> <!--判断是否提示信息--> <p th:text="${mes}" style="color: red" th:if="${not #strings.isEmpty(mes)}"/> <label class="sr-only"th:text="#{login.username}"></label> <input type="text" name="username" class="form-control" th:placeholder="#{login.username}" required="" autofocus=""> <label class="sr-only"th:text="#{login.password}"></label> <input type="password" name="password" class="form-control" th:placeholder="#{login.password}" required=""> <div class="checkbox mb-3"> <label> <input type="checkbox" value="remember-me"> [[#{login.remember}]] </label> </div> <button class="btn btn-lg btn-primary btn-block" type="submit" th:text="#{login.btn}"></button> <p class="mt-5 mb-3 text-muted">© 2017-2018</p> <a class="btn btn-sm" th:href="@{/index.html(l='zh_CN')}">中文</a> <a class="btn btn-sm" th:href="@{/index.html(l='en_US')}">English</a> </form> </body> </html> 这里面，<label class="sr-only"th:text="#{login.password}"></label>其中的#{login.password}访问到的就是根据不同语言设定访问到的不同的语言格式。 <a class="btn btn-sm" th:href="@{/index.html(l='zh_CN')}">中文</a> <a class="btn btn-sm" th:href="@{/index.html(l='en_US')}">English</a> 在点击不同的语言格式的时候，根绝th:href进行访问到"@{/index.html}，根绝从controller进行解析，访问到的还是login.html页面 (l='en_US')这个就是参数的传递，（key=value） 然后在MyLocalResolver进行参数的获取 public class MyLocalResolver implements LocaleResolver { @Override public Locale resolveLocale(HttpServletRequest request) { String l=request.getParameter("l"); Locale locale =Locale.getDefault(); if(!StringUtils.isEmpty(l)){ String [] spilt=l.split("_"); locale = new Locale(spilt[0],spilt[1]); } return locale; } @Override public void setLocale(HttpServletRequest request, HttpServletResponse response, Locale locale) { } } 其中，根据(HttpServletRequest request）进行从网页上进行request进行请求 然后在configuration中进行Bean的添加，将这个模块添加到容器系统中，进行应用： @Bean//添加组件（将网页获取的中英文标识的字符串进行返回） public LocaleResolver localeResolver(){ return new MyLocalResolver(); } } 通过Bean进行容器的添加，在系统中就存在相应的功能
##5.在登陆界面form表单里面进行提交的 <form class="form-signin" th:action="@{/user/login}" action="dashboard.html" th:method="post">， 会在controller中进行解析（method中的是post方式，在controller中要以）@PostMapping(value = "/user/login")进行解析 package com.example.controller; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.PostMapping; import org.springframework.web.bind.annotation.RequestParam; import org.thymeleaf.util.StringUtils; import javax.servlet.http.HttpSession; import java.util.Map; @Controller public class LoginController { @PostMapping(value = "/user/login") // @RequestParam ("username") String Username,根绝从login网页中传入的值进行数据的接收 public String login(@RequestParam ("username") String Username, @RequestParam ("password")String Password, Map<Object,String> map, HttpSession session){ //登陆成功 if(!StringUtils.isEmpty(Username)&&Password.equals("123")) { session.setAttribute("loginusername",Username); return "redirect:/main.html"; } //登录失败 else{ map.put("mes","用户名密码错误"); return "login"; } } } 根据th:action="@{/user/login}"进行controller的解析 @Controller public class LoginController { @PostMapping(value = "/user/login") // @RequestParam ("username") String Username,根绝从login网页中传入的值进行数据的接收 // @RequestParam ("password")String Password, public String login(@RequestParam ("username") String Username, @RequestParam ("password")String Password, Map<Object,String> map, HttpSession session){ //登陆成功 if(!StringUtils.isEmpty(Username)&&Password.equals("123")) { session.setAttribute("loginusername",Username); return "redirect:/main.html"; } //登录失败 else{ map.put("mes","用户名密码错误"); return "login"; } } } 这里面进行解析，同时根据在前台传过来的值，进行分析，（连接数据库同类），将传入的值与正确的值进行比较，如果相同进行跳转 并且// @RequestParam ("username") String Username,根据从login网页中传入的值进行数据的接收 跳转到的就是bashboard.html "redirect:/main.html";重定向：定向到的相当于是localhost：8080/crud/main.html(main.html进行controller解析)
##6.然后就是拦截器的设定 写一个拦截器 /* * 登陆拦截器 * */ public class LoginHandlerInterceptor implements HandlerInterceptor { //在目标方法执行之前 @Override public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception { Object user = request.getSession().getAttribute("loginusername"); if(user == null){ //未登录，进行拦截，返回登陆界面 request.setAttribute("mes","没有权限请先进行登陆操作"); request.getRequestDispatcher("index.html").forward(request,response); return false; }else { //已登录，放行 return true; } } @Override public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception { } @Override public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception { } } 在这里面就是集成现成的拦截器函数，在其中进行部分功能的丰富（返回错误信息） 在config中添加到bean中进行功能的丰富： @Bean //将组件注册在容器(地址映像) public WebMvcConfigurerAdapter webMvcConfigurerAdapter(){ WebMvcConfigurerAdapter adapter = new WebMvcConfigurerAdapter() { @Override public void addViewControllers(ViewControllerRegistry registry) { registry.addViewController("/").setViewName("login"); registry.addViewController("/index.html").setViewName("login"); registry.addViewController("/main.html").setViewName("dashboard"); } //注册拦截器 @Override public void addInterceptors(InterceptorRegistry registry) { //super.addInterceptors(registry); //静态资源； *.css , *.js //SpringBoot已经做好了静态资源映射 registry.addInterceptor(new LoginHandlerInterceptor()).addPathPatterns("/**") .excludePathPatterns("/index.html","/","/user/login","/asserts/**"); } }; return adapter; } 其中进行拦截registry.addInterceptor(new LoginHandlerInterceptor()).addPathPatterns("/**") .excludePathPatterns("/index.html","/","/user/login","/asserts/**"); 除去（excludePathPatterns）部分的请求，其余的请求都会进行拦截("/index.html","/","/user/login","/asserts/**");
下一节总结：员工列表、多个页面的项目布局的提取（https://www.cnblogs.com/zhaochunhui/p/11332050.html）