验证用户是否已经登录package cn.hongxin.filter;import java.io.IOException;import javax.servlet.Filter;import javax.servlet.FilterChain;import javax.ser ...
验证用户是否已经登录
package cn.hongxin.filter;
import java.io.IOException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
public class LoginFilter implements Filter{
public void init(FilterConfig filterConfig) throws ServletException {
}
public void doFilter(ServletRequest request, ServletResponse response,
FilterChain chain) throws IOException, ServletException {
//将request强转成htt...
HttpServletRequest req = (HttpServletRequest) request;
//获取session
HttpSession ss = req.getSession();
//从session中获取user
if(ss.getAttribute("user")==null){
原标题:验证用户是否已经登录与实现自动登录 (50)
关键词:登录
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