springboot中swagger的使用以及404的情况处理

spring boot 都是自动配置和注册的，但是在配置好swagger时，访问http://localhost:8080/swagger-ui.html#/
404报错如下：

No mapping foundfor HTTP request with URI[/swagger-ui.html]in DispatcherServlet

原因：springboot没有注册资源处理器，需要手动配置静态资源映射:

package com.springbootdemo.config;import org.springframework.context.annotation.Configuration;import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;

@Configuration
public class WebMvcConfig extends WebMvcConfigurerAdapter{
    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry){
        registry.addResourceHandler("/**")
                .addResourceLocations("classpath:/static/");

        registry.addResourceHandler("swagger-ui.html")
                .addResourceLocations("classpath:/META-INF/resources/");

        registry.addResourceHandler("/webjars/**")
                .addResourceLocations("classpath:/META-INF/resources/webjars/");
        super.addResourceHandlers(registry);}}