通过返回WebMvcConfigurationSupport 的方式, 默认会覆盖 Spring boot的自动配置, 导致配置失效静态资源无法访问:但是在WebMvcConfigurationadpter(已久过时)这是允许的
@Bean public WebMvcConfigurationSupport initIndexConfig() { return new WebMvcConfigurationSupport() { @Override protected void addViewControllers(ViewControllerRegistry registry) { registry.addViewController("/").setViewName("login"); registry.addViewController("/index.html").setViewName("login"); } @Override protected void addResourceHandlers(ResourceHandlerRegistry registry) { registry.addResourceHandler("/**") .addResourceLocations("classpath:/resources") .addResourceLocations("classpath:/static") .addResourceLocations("classpath:/templates") .addResourceLocations("classpath:/public"); } @Override protected void addInterceptors(InterceptorRegistry registry) { super.addInterceptors(registry); } }; }
WebMvcConfigurerAdapter 是一个适配器类,
/** @deprecated */ @Deprecated public abstract class WebMvcConfigurerAdapter implements WebMvcConfigurer { public WebMvcConfigurerAdapter() { }
而WebMvcConfigurationSupport 提供默认实现 不是一个空方法
public class WebMvcConfigurationSupport implements ApplicationContextAware, ServletContextAware { private static final boolean romePresent; private static final boolean jaxb2Present; private static final boolean jackson2Present; private static final boolean jackson2XmlPresent; private static final boolean jackson2SmilePresent; private static final boolean jackson2CborPresent;
所以: 采用返回 @Bean的方式, 会覆盖实现的很多默认配置导致不能使用,
正确的使用方法是:
@Configuration public class AppConfig extends WebMvcConfigurationSupport{ @Override protected void addViewControllers(ViewControllerRegistry registry) { registry.addViewController("/").setViewName("login"); registry.addViewController("/index.html").setViewName("login"); } @Override protected void addResourceHandlers(ResourceHandlerRegistry registry) { registry.addResourceHandler("/**") .addResourceLocations("classpath:/resources") .addResourceLocations("classpath:/static") .addResourceLocations("classpath:/templates") .addResourceLocations("classpath:/public"); } @Override protected void addInterceptors(InterceptorRegistry registry) { super.addInterceptors(registry); }
你还可以选择 直接实现
WebMvcConfigurer
WebMvcConfigurationSupport 避坑指南
原文：https://www.cnblogs.com/dgwblog/p/11962497.html