1、默认访问首页
1.引入thymeleaf和引入bootstrap
<!--引入thymeleaf-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
<!--引入bootstrap-->
<dependency>
<groupId>org.webjars</groupId>
<artifactId>bootstrap</artifactId>
<version>4.1.0</version>
</dependency>
2.新建mvc配置类
//@EnableWebMvc
@Configuration//扩展springmvc功能
public class MyMvcConfig implements WebMvcConfigurer {
//用来做视图映射 浏览器发送 /和/index.htm 请求来到 login页面(由thymeleaf提供)
@Override
public void addViewControllers(ViewControllerRegistry registry) {
registry.addViewController("/").setViewName("login");
registry.addViewController("/index.html").setViewName("login");
registry.addViewController("/main.html").setViewName("dashboard");
}
}
application.properties
server.servlet.context-path=/crud
配置web应用的请求路径
2、国际化
springmvc国际化的配置:
1)、编写国际化配置文件;
2)、使用ResourceBundleMessageSource管理国际化资源文件
3)、在页面使用fmt:message取出国际化内容
springboot自动化的配置:
步骤:
1)、编写国际化配置文件,抽取页面需要显示的国际化消息
login.properties
login_en_US.properties
log.btn=Sign In
login.password=Password
login.Remember=Remember me
login.tip=Please sign in
login.username=Username
中文环境类似
2)、SpringBoot自动配置好了管理国际化资源文件的组件;
@Configuration
@ConditionalOnMissingBean(value = MessageSource.class, search = SearchStrategy.CURRENT)
@AutoConfigureOrder(Ordered.HIGHEST_PRECEDENCE)
@Conditional(ResourceBundleCondition.class)
@EnableConfigurationProperties
public class MessageSourceAutoConfiguration {
//添加基础名配置类,配置文件可以直接放在类路径下叫messages.properties;
@Bean
@ConfigurationProperties(prefix = "spring.messages")
public MessageSourceProperties messageSourceProperties() {
return new MessageSourceProperties();
}
@Bean
public MessageSource messageSource(MessageSourceProperties properties) {
ResourceBundleMessageSource messageSource = new ResourceBundleMessageSource();
if (StringUtils.hasText(properties.getBasename())) {
//设置国际化资源文件的基础名(去掉语言国家代码的)
messageSource.setBasenames(StringUtils
.commaDelimitedListToStringArray(StringUtils.trimAllWhitespace(properties.getBasename())));
}
if (properties.getEncoding() != null) {
messageSource.setDefaultEncoding(properties.getEncoding().name());
}
messageSource.setFallbackToSystemLocale(properties.isFallbackToSystemLocale());
Duration cacheDuration = properties.getCacheDuration();
if (cacheDuration != null) {
messageSource.setCacheMillis(cacheDuration.toMillis());
}
messageSource.setAlwaysUseMessageFormat(properties.isAlwaysUseMessageFormat());
messageSource.setUseCodeAsDefaultMessage(properties.isUseCodeAsDefaultMessage());
return messageSource;
}
}
application.properties
spring.messages.basename=i18n.login, i18n.language
3)、去页面获取国际化的值
由于使用thymeleaf,用#{}取国际化信息
<input type="text" name="username" class="form-control" placeholder="Username" th:placeholder="#{login.username}" required="" autofocus="">
若这里有中文乱码,请参考idea中properties中文乱码怎么解决。
效果:根据浏览器语言设置的信息切换了国际化;
4)、点击链接切换国际化
原理解析:
springmvc中:国际化Locale(区域信息对象);LocaleResolver(获取区域信息对象);
WebMvcAutoConfiguration
@Bean
@ConditionalOnMissingBean
@ConditionalOnProperty(prefix = "spring.mvc", name = "locale")
public LocaleResolver localeResolver() {
if (this.mvcProperties.getLocaleResolver() == WebMvcProperties.LocaleResolver.FIXED) {
return new FixedLocaleResolver(this.mvcProperties.getLocale());
}
//根据请求头request中获取区域信息,
AcceptHeaderLocaleResolver localeResolver = new AcceptHeaderLocaleResolver();
localeResolver.setDefaultLocale(this.mvcProperties.getLocale());
return localeResolver;
}
自定义区域信息解析器:
html页面:
<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>
区域信息解析器:
package com.spboot.springboot04.component;
import org.springframework.util.StringUtils;
import org.springframework.web.servlet.LocaleResolver;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.Locale;
/*
* 链接上携带区域信息
* */
public class MyLocaleResolver implements LocaleResolver {
@Override
public Locale resolveLocale(HttpServletRequest request) {
String l = request.getParameter("l");
Locale locale = Locale.getDefault();//根据浏览器默认
if(!StringUtils.isEmpty(l)){
String[] s = l.split("_");
locale = new Locale(s[0],s[1]);
}
return locale;
}
@Override
public void setLocale(HttpServletRequest request, HttpServletResponse response, Locale locale) {
}
}
将自己添加的区域信息解析器添加到springmvc配置类中,从而添加到容器中:
@Configuration//扩展springmvc功能
public class MyMvcConfig implements WebMvcConfigurer {
.
.
.
.
@Bean
public LocaleResolver localeResolver(){
return new MyLocaleResolver();
}
}
测试: