WebMvcConfigurationSupport 避坑指南
2024-10-12 02:19:36
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; 关于支持Webjar Swagger 等Jar包的资源路径
/**
* 资源路径 映射
*/
@Override
protected void addResourceHandlers(ResourceHandlerRegistry registry) {
registry.addResourceHandler("/**")
.addResourceLocations("classpath:/resources")
.addResourceLocations("classpath:/static")
.addResourceLocations("classpath:/templates")
.addResourceLocations("classpath:/public");
/**
* 支持webjars
*/
registry.addResourceHandler("/webjars/**")
.addResourceLocations("classpath:/META-INF/resources/webjars/");
/**
* 支持swagger
*/
registry.addResourceHandler("swagger-ui.html")
.addResourceLocations("classpath:/META-INF/resources/");
super.addResourceHandlers(registry);
}
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