创建interceptor包
创建LoginInterceptor 继承 HandlerInterceptor 实现
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
//1.获取当前的session
HttpSession session = request.getSession();
User user = (User) session.getAttribute("user");
//2.判断user是否存在
if (user!=null){
return true;
}else {
response.sendRedirect( "/user/login");
return false;
}
}
@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 {
}
创建LoginConfig类继承WebMvcConfigurer
注解标注为配置类
实现addInterceptors方法
@Override
public void addInterceptors(InterceptorRegistry registry) {
//注册TestInterceptor拦截器
InterceptorRegistration registration = registry.addInterceptor(new LoginInterceptor());
registration.addPathPatterns("/**");
registration.excludePathPatterns("/user/login",
"/user/doLogin",
"/css/*.css",
"/img/*.png",
"/img/*.jpg",
"/js/*.js");
}
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