1、首頁定製

• 在WebMvcAutoConfiguration.class中找到以下程式碼，得出

  自定義一個index.html，放在靜態資源目錄下，就可以實現首頁定製

  @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;
  }
  ​
  //從靜態資源目錄裡獲取 index.html 當作首頁
  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");
   
  }

2、錯誤頁定製

• 在 resources 資料夾下建立 error 資料夾

  • 新建 404.html ，則出現 404 錯誤就會自動跳轉到這個頁面

  • 新建 500.html ，則出現 500 錯誤就會自動跳轉到這個頁面