SpringBoot配置拦截器_spring boot 拦截器设置-优快云博客

本文链接：https://blog.youkuaiyun.com/weixin_40612082/article/details/110182085

本文介绍了在SpringBoot中如何创建自定义拦截器，以防止未登录用户访问特定页面的问题。通过设置拦截器，可以有效地进行登录状态检查，增强应用安全性。

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问题场景：

登录页面做好登录功能以后，防止在未登录的状态下访问其他页面。

解决方案：

自定义拦截器


public class LoginIntercepter implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        Object user = request.getSession().getAttribute("LoginUser");
        if(user == null){
            //未登陆，返回登陆页面
            request.setAttribute("msg","没有权限请先登陆");
            request.getRequestDispatcher("/index.html").forward(request,response);
            return false;
        }else{
            //已登陆，放行请求
            return true;
        }

    }

    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {

    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {

    }
}

添加拦截器

@Configuration
public class MyMvcConfig extends WebMvcConfigurerAdapter {
    @Override
    public void addInterceptors(InterceptorRegistry registry) {
//        super.addInterceptors(registry);
        registry.addInterceptor(new LoginIntercepter()).addPathPatterns("/**")
                .excludePathPatterns("/",
                        "/index.html",
                        "/user/login",
                        "/asserts/**",
                        "/webjars/**");
    }