SpringBoot增加管理后台登录拦截器验证用户登录

一、增加拦截器
@Component
public class AdminLoginInterceptor implements HandlerInterceptor {

@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object o) throws Exception {
    String requestServletPath = request.getServletPath();
    if (requestServletPath.startsWith("/admin") && null == request.getSession().getAttribute("loginUser")) {
        request.getSession().setAttribute("errorMsg", "请登陆");
        response.sendRedirect(request.getContextPath() + "/admin/login");
        return false;
    } else {
        request.getSession().removeAttribute("errorMsg");
        return true;
    }
}

@Override
public void postHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, ModelAndView modelAndView) throws Exception {
}

@Override
public void afterCompletion(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, Exception e) throws Exception {

}

}

二、将验证登录拦截器添加到拦截器链
@Configuration
public class WebConfig implements WebMvcConfigurer {
@Autowired
private AdminLoginInterceptor adminLoginInterceptor;

@Override
public void addInterceptors(InterceptorRegistry registry) {
    // 添加一个拦截器，拦截以/admin为前缀的url路径（后台登陆拦截）
    registry.addInterceptor(adminLoginInterceptor)
            .addPathPatterns("/admin/**")
            // 放行登录地址
            .excludePathPatterns("/admin/login")
            // 放行静态资源
            .excludePathPatterns("/admin/dist/**")
            .excludePathPatterns("/admin/plugins/**");
}

}