代碼鏈接
Springboot的簡(jiǎn)單RestfulCRUD實(shí)驗(yàn)下
一、引入資源
1、先導(dǎo)入對(duì)應(yīng)的pom依賴
我這里就只寫了一點(diǎn)關(guān)鍵的依賴
<!--引入web模塊-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<!--引入jquery-webjar-->
<dependency>
<groupId>org.webjars</groupId>
<artifactId>jquery</artifactId>
<version>3.4.1</version>
</dependency>
<!--引入bootstrap-->
<dependency>
<groupId>org.webjars</groupId>
<artifactId>bootstrap</artifactId>
<version>4.0.0</version>
</dependency>
<!--引入后就可以不用set.get方法了-->
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.18.12</version>
</dependency>
2、引入的資源的放置位置
1
3、項(xiàng)目的架構(gòu)
2
二、登陸界面的國際化
1、展示界面
中文：
3
英文：
4
步驟：
1. 編寫國際化配置文件
5
2。SpringBoot自動(dòng)配置好了管理國際化資源文件的組件；
@ConfigurationProperties(prefix = "spring.messages")
public class MessageSourceAutoConfiguration {
/**
* Comma-separated list of basenames (essentially a fully-qualified classpath
* location), each following the ResourceBundle convention with relaxed support for
* slash based locations. If it doesn't contain a package qualifier (such as
* "org.mypackage"), it will be resolved from the classpath root.
*/
private String basename = "messages";
//我們的配置文件可以直接放在類路徑下叫messages.properties；
@Bean
public MessageSource messageSource() {
ResourceBundleMessageSource messageSource = new ResourceBundleMessageSource();
if (StringUtils.hasText(this.basename)) {
//設(shè)置國際化資源文件的基礎(chǔ)名（去掉語言國家代碼的）
messageSource.setBasenames(StringUtils.commaDelimitedListToStringArray(
StringUtils.trimAllWhitespace(this.basename)));
}
if (this.encoding != null) {
messageSource.setDefaultEncoding(this.encoding.name());
}
messageSource.setFallbackToSystemLocale(this.fallbackToSystemLocale);
messageSource.setCacheSeconds(this.cacheSeconds);
messageSource.setAlwaysUseMessageFormat(this.alwaysUseMessageFormat);
return messageSource;
}
3.去頁面獲取國際化的值
<!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 href="asserts/css/bootstrap.min.css" th:href="@{/webjars/bootstrap/4.0.0/css/bootstrap.css}" rel="stylesheet">
<!-- Custom styles for this template -->
<link href="asserts/css/signin.css" th:href="@{/asserts/css/signin.css}" rel="stylesheet">
</head>
<body class="text-center">
<form class="form-signin" action="dashboard.html">
<img class="mb-4" th:src="@{/asserts/img/bootstrap-solid.svg}" src="asserts/img/bootstrap-solid.svg" alt="" width="72" height="72">
<h1 class="h3 mb-3 font-weight-normal" th:text="#{login.tip}">Please sign in</h1>
<label class="sr-only" th:text="#{login.username}">Username</label>
<input type="text" class="form-control" placeholder="Username" th:placeholder="#{login.username}" required="" autofocus="">
<label class="sr-only" th:text="#{login.password}">Password</label>
<input type="password" class="form-control" placeholder="Password" 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}">Sign in</button>
<p class="mt-5 mb-3 text-muted">? 2017-2018</p>
<a class="btn btn-sm">中文</a>
<a class="btn btn-sm">English</a>
</form>
</body>
</html>
效果：根據(jù)瀏覽器語言設(shè)置的信息切換了國際化；
原理：
? 國際化Locale（區(qū)域信息對(duì)象）；LocaleResolver（獲取區(qū)域信息對(duì)象）；
@Bean
@ConditionalOnMissingBean
@ConditionalOnProperty(prefix = "spring.mvc", name = "locale")
public LocaleResolver localeResolver() {
if (this.mvcProperties
.getLocaleResolver() == WebMvcProperties.LocaleResolver.FIXED) {
return new FixedLocaleResolver(this.mvcProperties.getLocale());
}
AcceptHeaderLocaleResolver localeResolver = new AcceptHeaderLocaleResolver();
localeResolver.setDefaultLocale(this.mvcProperties.getLocale());
return localeResolver;
}
默認(rèn)的就是根據(jù)請(qǐng)求頭帶來的區(qū)域信息獲取Locale進(jìn)行國際化
4.點(diǎn)擊鏈接切換國際化
/**
* 可以在連接上攜帶區(qū)域信息
*/
public class MyLocaleResolver implements LocaleResolver {
@Override
public Locale resolveLocale(HttpServletRequest request) {
String l = request.getParameter("l");
Locale locale = Locale.getDefault();
if(!StringUtils.isEmpty(l)){
String[] split = l.split("_");
locale = new Locale(split[0],split[1]);
}
return locale;
}
@Override
public void setLocale(HttpServletRequest request, HttpServletResponse response, Locale locale) {
}
}
@Bean
public LocaleResolver localeResolver(){
return new MyLocaleResolver();
}
}
5.進(jìn)行登錄
開發(fā)期間模板引擎頁面修改以后，要實(shí)時(shí)生效
1）、禁用模板引擎的緩存
# 禁用緩存
spring.thymeleaf.cache=false
2）、頁面修改完成以后ctrl+f9：重新編譯；
登陸錯(cuò)誤消息的顯示
<p style="color: red" th:text="${msg}" th:if="${not #strings.isEmpty(msg)}"></p>
6.攔截器進(jìn)行登陸檢查
攔截器
/**
* 登陸檢查，
*/
public class LoginHandlerInterceptor implements HandlerInterceptor {
//目標(biāo)方法執(zhí)行之前
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
Object user = request.getSession().getAttribute("loginUser");
if(user == null){
//未登陸，返回登陸頁面
request.setAttribute("msg","沒有權(quán)限請(qǐng)先登陸");
request.getRequestDispatcher("/index.html").forward(request,response);
return false;
}else{
//已登陸，放行請(qǐng)求
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 {
}
}
注冊(cè)攔截器
//所有的WebMvcConfigurerAdapter組件都會(huì)一起起作用
@Bean //將組件注冊(cè)在容器
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");
}
//注冊(cè)攔截器
@Override
public void addInterceptors(InterceptorRegistry registry) {
//super.addInterceptors(registry);
//靜態(tài)資源； *.css , *.js
//SpringBoot已經(jīng)做好了靜態(tài)資源映射
registry.addInterceptor(new LoginHandlerInterceptor()).addPathPatterns("/**")
.excludePathPatterns("/index.html","/","/user/login");
}
};
return adapter;
}
