updateservlet.java

网上购书系统 采用jsp+servlet+sql2000

package servlet;

import java.io.IOException;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.SQLException;

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

import base.DaoBase;
import bean.Order;

public class UpdateServlet extends HttpServlet {

	@Override
	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
		int id=Integer.parseInt(request.getParameter("id"));
		int how=Integer.parseInt(request.getParameter("how"));
		Order order=new Order();
		order.setId(id);
		order.setHow(how);
		DaoBase db=new DaoBase();
		Connection conn=db.getConn();
		String sql="update [order] set how=? where id=?";
	
	try {
		PreparedStatement ps=conn.prepareStatement(sql);
		ps.setInt(1, order.getHow());
		ps.setInt(2, order.getId());
		ps.executeUpdate();
		ps.close();
	} catch (SQLException e) {
		// TODO Auto-generated catch block
		e.printStackTrace();
	}
	db.closeConn();
	request.getRequestDispatcher("order").forward(request, response);
	}
	@Override
	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
		super.doGet(request, response);
	}
}