myservlet.java

利用index.jsp和url.jsp页面实现自动登陆 index.jsp页面负责从cookie中取出用户名 url.jsp页面负责显示用户名

package servlet;
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
import com.leon.util.LongTimeCookie;
public class MyServlet extends HttpServlet
{
	public void doGet(HttpServletRequest request,HttpServletResponse response)throws ServletException,IOException
	{
		CheckLogin c =new CheckLogin();
		if(c.isLogin(request))
		{
			//将用户的名字放入session中
    		HttpSession session =request.getSession();
    		String name=request.getParameter("txtName");
    		session.setAttribute("userName",name);
    		
    		//取得登陆框中复选框，保存用户的姓名到cookie中
	    	if(request.getParameter("checkbox")!=null)
	    	{
	    		//生成一个cookie
	    		Cookie coo=new LongTimeCookie("loginName",name);
	    		response.addCookie(coo);		
	    	}
	    	
			response.sendRedirect("/test/loginAccess.jsp");
		}
		else
			response.sendRedirect("/test/loginFail.jsp");
	}	
	
	public void doPost(HttpServletRequest request,HttpServletResponse response)throws ServletException,IOException
	{
		doGet(request,response);
	}

}