1,定义拦截器类 implements HandlerInterceptor
public class MyInterceptor implements HandlerInterceptor
{
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object o) throws Exception {
System.out.println("uri="+request.getRequestURI());
//登录不做拦截
if(request.getRequestURI().equals("/userbg/login") || request.getRequestURI().equals("/user/login_view"))
{
return true;
}
//验证session是否存在
Object obj = request.getSession().getAttribute("_session_user");
if(obj == null)
{
response.sendRedirect("/user/login_view");
return false;
}
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 {
}
}
2,编写拦截器拦截路径的配置类extends WebMvcConfigurerAdapter
@Configuration
public class MyConfiguration extends WebMvcConfigurerAdapter
{
@Override
public void addInterceptors(InterceptorRegistry registry) {
registry.addInterceptor(new MyInterceptor()).addPathPatterns("/**");
}
}