detailservlet.java

基于jsp的网上书店

package shop;

import java.io.IOException;

import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;


public final class DetailServlet extends HttpServlet{ 
	
	public DetailServlet(){
		super();
	}
	
	public void init(ServletConfig config)throws ServletException{
		super.init(config);
	}
	
	public void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {      
		  
		
		HttpSession session = req.getSession();
		if(session==null){
			System.out.println("no session");
			System.exit(1);
			
		}
		Integer productId = (Integer)req.getAttribute("productId");
		
		//获取商品详情
        DB	 db=new DB();
		shop sp=new shop();
		Product product = null;
		try {
			product = sp.getProduct(db, productId.intValue());
		} catch (Exception e) {
			// TODO 自动生成 catch 块
			e.printStackTrace();
		}
		
		session.setAttribute(Constants.CUR_PRODUCT_KEY ,product);
	   	resp.sendRedirect("Detail.jsp");					
 	}	
}