2、Web开发

一、静态资源导入

用以存储html、js文件

WebMvcAutoConfiguration类中addResourceHandlers方法

1、webjars

public void addResourceHandlers(ResourceHandlerRegistry registry) {
            if (!this.resourceProperties.isAddMappings()) {
                logger.debug("Default resource handling disabled");
            } else {
                // webjars方式
                Duration cachePeriod = this.resourceProperties.getCache().getPeriod();
                CacheControl cacheControl = this.resourceProperties.getCache().getCachecontrol().toHttpCacheControl();
                if (!registry.hasMappingForPattern("/webjars/**")) {
                    this.customizeResourceHandlerRegistration(registry.addResourceHandler(new String[]{"/webjars/**"}).addResourceLocations(new String[]{"classpath:/META-INF/resources/webjars/"}).setCachePeriod(this.getSeconds(cachePeriod)).setCacheControl(cacheControl));
                }
                String staticPathPattern = this.mvcProperties.getStaticPathPattern();
                if (!registry.hasMappingForPattern(staticPathPattern)) {
                    this.customizeResourceHandlerRegistration(
                        registry.addResourceHandler(new String[]{staticPathPattern})
                        .addResourceLocations(
                            // 指定当前目录
                            WebMvcAutoConfiguration.getResourceLocations(this.resourceProperties.getStaticLocations())
                          )
                        .setCachePeriod(this.getSeconds(cachePeriod)).setCacheControl(cacheControl));
                }
            }
        }

2、配置的常规路径

org.springframework.boot.autoconfigure.web.ResourceProperties类
可以直接访问。

private static final String[] CLASSPATH_RESOURCE_LOCATIONS = new String[]{
    "classpath:/META-INF/resources/",
    "classpath:/resources/", 
    "classpath:/static/", 
    "classpath:/public/"
    };

3、application.properties指定

spring.mvc.static-path-pattern=

二、首页配置

必须配置index.html 文件，放在静态目录下

@Bean
public WelcomePageHandlerMapping welcomePageHandlerMapping(ApplicationContext applicationContext, FormattingConversionService mvcConversionService, ResourceUrlProvider mvcResourceUrlProvider) {
     WelcomePageHandlerMapping welcomePageHandlerMapping = new WelcomePageHandlerMapping(new TemplateAvailabilityProviders(applicationContext), applicationContext, this.getWelcomePage(), this.mvcProperties.getStaticPathPattern());
     welcomePageHandlerMapping.setInterceptors(this.getInterceptors(mvcConversionService, mvcResourceUrlProvider));
     welcomePageHandlerMapping.setCorsConfigurations(this.getCorsConfigurations());
     return welcomePageHandlerMapping;
}
        private Optional<Resource> getWelcomePage() {
            String[] locations = WebMvcAutoConfiguration.getResourceLocations(this.resourceProperties.getStaticLocations());
            return Arrays.stream(locations).map(this::getIndexHtml).filter(this::isReadable).findFirst();
        }
        private Resource getIndexHtml(String location) {
            return this.resourceLoader.getResource(location + "index.html");
        }

三、模板引擎

https://www.cnblogs.com/hellokuangshen/p/12516870.html
https://www.thymeleaf.org/
SpringBoot内嵌的tomcat不支持jsp，所以需要使用模板引擎，SpringBoot官方推荐使用thymeleaf。
数据 和 html进行组装

[

](https://www.thymeleaf.org/)