public String logout(HttpServletRequest request, HttpServletResponse response, Page page) {
		request.getSession().removeAttribute("user");
		return "@forehome";	
	}	

package tmall.servlet;

import java.util.List;

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

import org.springframework.web.util.HtmlUtils;

import tmall.bean.Category;
import tmall.bean.Product;
import tmall.bean.ProductImage;
import tmall.bean.PropertyValue;
import tmall.bean.Review;
import tmall.bean.User;
import tmall.dao.CategoryDAO;
import tmall.dao.ProductDAO;
import tmall.dao.ProductImageDAO;
import tmall.util.Page;

public class ForeServlet extends BaseForeServlet {
	public String home(HttpServletRequest request, HttpServletResponse response, Page page) {
		List<Category> cs= new CategoryDAO().list();
		new ProductDAO().fill(cs);
		new ProductDAO().fillByRow(cs);
		request.setAttribute("cs", cs);
		return "home.jsp";
	}

	public String register(HttpServletRequest request, HttpServletResponse response, Page page) {
		String name = request.getParameter("name");
		String password = request.getParameter("password");
		name = HtmlUtils.htmlEscape(name);
		System.out.println(name);
		boolean exist = userDAO.isExist(name);
		
		if(exist){
			request.setAttribute("msg", "用户名已经被使用,不能使用");
			return "register.jsp";	
		}
		
		User user = new User();
		user.setName(name);
		user.setPassword(password);
		System.out.println(user.getName());
		System.out.println(user.getPassword());
		userDAO.add(user);
		
		return "@registerSuccess.jsp";	
	}	
	public String login(HttpServletRequest request, HttpServletResponse response, Page page) {
		String name = request.getParameter("name");
		name = HtmlUtils.htmlEscape(name);
		String password = request.getParameter("password");		
		
		User user = userDAO.get(name,password);
		 
		if(null==user){
			request.setAttribute("msg", "账号密码错误");
			return "login.jsp";	
		}
		request.getSession().setAttribute("user", user);
		return "@forehome";	
	}	
	
	public String product(HttpServletRequest request, HttpServletResponse response, Page page) {
		int pid = Integer.parseInt(request.getParameter("pid"));
		Product p = productDAO.get(pid);
		
		List<ProductImage> productSingleImages = productImageDAO.list(p, ProductImageDAO.type_single);
		List<ProductImage> productDetailImages = productImageDAO.list(p, ProductImageDAO.type_detail);
		p.setProductSingleImages(productSingleImages);
		p.setProductDetailImages(productDetailImages);
		
		List<PropertyValue> pvs = propertyValueDAO.list(p.getId());		
	
		List<Review> reviews = reviewDAO.list(p.getId());
		
		productDAO.setSaleAndReviewNumber(p);

		request.setAttribute("reviews", reviews);

		request.setAttribute("p", p);
		request.setAttribute("pvs", pvs);
		return "product.jsp";		
	}
	public String logout(HttpServletRequest request, HttpServletResponse response, Page page) {
		request.getSession().removeAttribute("user");
		return "@forehome";	
	}	
}