LoginInterceptor

最新推荐文章于 2023-08-20 15:28:13 发布

原创最新推荐文章于 2023-08-20 15:28:13 发布 · 1.2k 阅读

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CC 4.0 BY-SA版权

本文介绍了一个基于Spring MVC框架的登录拦截器(LoginInterceptor)实现。该拦截器用于检查用户的登录状态，确保只有已登录的用户才能访问受保护的资源。如果用户未登录，则将被重定向到登录页面。

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package ssm.interceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

public class LoginInterceptor implements HandlerInterceptor{

@Override
public void afterCompletion(HttpServletRequest arg0,
HttpServletResponse arg1, Object arg2, Exception arg3)
throws Exception {
// TODO Auto-generated method stub

}
@Override
public void postHandle(HttpServletRequest arg0, HttpServletResponse arg1,
Object arg2, ModelAndView arg3) throws Exception {
// TODO Auto-generated method stub

}
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response,
Object arg2) throws Exception {
HttpSession session=request.getSession();

if(request.getServletPath().lastIndexOf("login.action")>=0){
return true;
}

if(session !=null){
if(session.getAttribute("loginUser") !=null){
return true;
}
}
response.sendRedirect("login.jsp");
return false;
}

}