jsp学习笔记（14）

package servlet;
	import java.io.IOException;
	import java.util.ArrayList;
	import javax.servlet.ServletException;
	import javax.servlet.http.HttpServlet;
	import javax.servlet.http.HttpServletRequest;
	import javax.servlet.http.HttpServletResponse;
	import dao.DBOperation;
	public class ListServlet extends HttpServlet {
		public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
			DBOperation op = new DBOperation();
			//图书分类
			String sql1 = "select * from types";
			ArrayList al1 = op.queryReturnList(sql1);
			request.setAttribute("type", al1);
			//销售榜
			String sql3 = "select bookid,name from books as t1 ,rank as t2 where t1.id = 
			t2.bookid order by quantity desc";
			ArrayList al3 = op.queryReturnList(sql3);
			request.setAttribute("xiaosou", al3);
			//图书类别（最新上架书、最新推荐书）
			String sql4 = "select * from tates";
			ArrayList al4 = op.queryReturnList(sql4);
			request.setAttribute("tate", al4);
			//最新推荐书
			String sql5 = "select * from books where tate=1";
			ArrayList al5 = op.queryReturnList(sql5);
			request.setAttribute("tuibook", al5);
			//最新上架书
			String sql6 = "select * from books where tate=2";
			ArrayList al6 = op.queryReturnList(sql6);
			request.setAttribute("newbook", al6);
		}
		public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		doGet(request, response);
		}
	}