checkgoodid.java

还是超市系统

/**@(#)CheckGoodId.java*/
package test.expense;

import java.io.IOException;
import java.sql.*;

import javax.servlet.*;
import javax.servlet.http.*;

/**检验goodId是否有效
 * @version 0.1
 * @author kyle
 * @date 20060803 pm 14:56
 */
public class CheckGoodId extends HttpServlet{

	public void doGet(HttpServletRequest req,HttpServletResponse res)throws ServletException ,IOException{
		
		Connection conn;
		Statement stmt;
		ResultSet rs;
		
		int goodId;
		System.out.println(req.getParameter("hgoodId"));
		goodId=Integer.parseInt(req.getParameter("hgoodId"));
		//System.out.println(req.getParameter("goodId"));
		
		try{
			Class.forName("oracle.jdbc.driver.OracleDriver");
			conn = DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:SMarket","scott","tiger");
			stmt = conn.createStatement();
			
			rs = stmt.executeQuery("SELECT good_id FROM table_good WHERE good_id="+goodId);
			if(rs.next()){
				
				getServletConfig().getServletContext().getRequestDispatcher("/pages/exist.html").forward(req,res);
			}else{
				getServletConfig().getServletContext().getRequestDispatcher("/pages/cando.html").forward(req,res);
			}
		}catch(Exception e){
			e.printStackTrace();
		}
		//getServletConfig().getServletContext().getRequestDispatcher("/pages/showgood.jsp").forward(req,res);
	}
	public void doPost(HttpServletRequest req,HttpServletResponse res)throws ServletException ,IOException{
		
		doGet(req,res);
	}
}