userlogin.java

这是一个网上书站的例子

/*
 * Generated by MyEclipse Struts
 * Template path: templates/java/JavaClass.vtl
 */
package com.zxf.struts.login;

import java.io.IOException;
import java.sql.ResultSet;
import java.sql.SQLException;

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

import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;

import com.cart.Cart;
import com.db.Jdo;

/** 
 * MyEclipse Struts
 * Creation date: 01-10-2008
 * 
 * XDoclet definition:
 * @struts.action validate="true"
 */
public class UserLogin extends Action {
	/*
	 * Generated Methods
	 */

	/** 
	 * Method execute
	 * @param mapping
	 * @param form
	 * @param request
	 * @param response
	 * @return ActionForward
	 */
	public ActionForward execute(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response) {
		// TODO Auto-generated method stub
		UserLoginForm userLoginForm=(UserLoginForm)form;
		String username=userLoginForm.getUsername();
		String password=userLoginForm.getPassword();
		Jdo jdo=new Jdo();
		int userid=1;
		
		int count=jdo.rowCount("select count(*) from user where username='"+username+"' and password='"+password+"'");
		HttpSession ses=request.getSession();
		if(count>=1)
		{	ResultSet rs=jdo.executeQuery("select * from user where username='"+username+"' and password='"+password+"'");
		
			try {
				rs.next();
				userid=rs.getInt("userid");
				
			} catch (SQLException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
			ses.setAttribute("userid", ""+userid);
			ses.setAttribute("uservalidate", "1");
			ses.setAttribute("username", username);
			Cart cart=new Cart();
	  		ses.setAttribute("cart",cart);
			jdo.destroy();
			return mapping.findForward("userloginsucess");
		}
		else
		{
		
			jdo.destroy();
			try {
				response.sendRedirect("fail.jsp");
			} catch (IOException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
			return null;
		}
		
		
	}
}