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/**");
}
}