springboot2.3.4版本配置拦截器（不会配的，样式失效的看过来）

我使用的是springboot2.3.4，注意要实现HandlerInterceptor接口

@Configuration
public class LoginInterceptor implements HandlerInterceptor {

    @Override
    public boolean preHandle(HttpServletRequest request,
                             HttpServletResponse response,
                             Object handler) throws Exception {

        if(request.getSession().getAttribute("user") == null){
            response.sendRedirect("/admin");
            return false;
        }
        return true;
    }
}

然后将拦截器配置到springboot中

@Configuration
public class webConfig implements WebMvcConfigurer {  //extends WebMvcConfigurationSupport   //implements WebMvcConfigurer
    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        registry.addInterceptor(new LoginInterceptor())
                .addPathPatterns("/admin/**")
                .excludePathPatterns("/admin")
                .excludePathPatterns("/admin/login");
    }

//这里配置不要拦截静态资源
    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {        registry.addResourceHandler("/static/**").addResourceLocations("/static/");

    }
}

还要注意静态资源的引用格式
比如：

<link rel="stylesheet" href="../static/css/me.css" th:href="@{/css/me.css}">

本文地址：https://blog.csdn.net/DoMyBestintheworld/article/details/109256865