SpringBoot——Web开发(静态资源映射)

  • 2019 年 10 月 6 日
  • 筆記

静态资源映射

SpringBoot对于SpringMVC的自动化配置都在WebMVCAutoConfiguration类中。

其中一个静态内部类WebMvcAutoConfigurationAdapter实现了WebMvcConfigurer接口。(361)

WebMvcConfigurer接口中定义了addResourceHandlers处理静态资源的默认映射关系.(500)

addResourceHandlers在WebMvcAutoConfigurationAdapter类中实现

public void addResourceHandlers(ResourceHandlerRegistry registry) {              if (!this.resourceProperties.isAddMappings()) {                  logger.debug("Default resource handling disabled");              } else {                  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(WebMvcAutoConfiguration.getResourceLocations(this.resourceProperties.getStaticLocations())).setCachePeriod(this.getSeconds(cachePeriod)).setCacheControl(cacheControl));                  }                }          }

其中

this.resourceProperties.getStaticLocations()

返回静态资源的默认映射关系,

getStaticLocations()方法在ResourceProperties中定义

其中,

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

classpath:/META-INF/resources/

classpath:/resources/

classpath:/static/

classpath:/public/

第五个默认的资源映射:在静态方法getResourceLocations中定义

/

小结:

默认情况下,可以在以下五个位置放置静态资源

classpath:/META-INF/resources/    classpath:/resources/    classpath:/static/    classpath:/public/    /

【静态资源一般放在classpath:/static/目录下】

自定义favicon,自定义index.html

favicon.ico是浏览器左上角的图标,可以放在静态资源路径下或者类路径下,静态资源路径优先级高。

SpringBoot启动后默认在静态资源目录下寻找index.html,如果没有找到;就会去resource/templates目录下寻找index.html(使用Thymeleaf模板)

定制banner

http://www.network-science.de/ascii/

创建banner.txt文件置于resource目录下

代码参考:

https://github.com/HCJ-shadow/SpringBootPlus