loginaction.java

实现了基本的增删改查和分页功能很简单的但是挺不错的适合初学者

/*
 * Generated by MyEclipse Struts
 * Template path: templates/java/JavaClass.vtl
 */
package org.demo.web.action;

import java.util.Vector;

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 org.apache.struts.action.ActionMessage;
import org.apache.struts.action.ActionMessages;
import org.demo.dao.Check;
import org.demo.web.form.LoginForm;

/** 
 * MyEclipse Struts
 * Creation date: 11-01-2008
 * 
 * XDoclet definition:
 * @struts.action path="/login" name="loginForm" input="/login.jsp" scope="request" validate="true"
 */
public class LoginAction 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) {
		LoginForm loginForm = (LoginForm) form;// TODO Auto-generated method stub
		String username=loginForm.getUsername();
		String password=loginForm.getPassword();
		boolean flag=Check.checkUser(username, password);
		ActionMessages errors=new ActionMessages();
		if(flag){
			Vector<String> userarray=(Vector)this.getServlet().getServletContext().getAttribute("userarray");
			if(userarray==null){
				userarray=new Vector<String>();
			}
			if(userarray.contains(username)){
				errors.add("loginerror",new ActionMessage("login.error"));
				this.saveErrors(request, errors);
				return mapping.getInputForward();
			}else{
				userarray.add(username);
				this.getServlet().getServletContext().setAttribute("userarray", userarray);
				HttpSession ses=request.getSession();
				ses.setAttribute("username", username);
				return mapping.findForward("toIndex");
			}
		}else{
			errors.add("loginerror",new ActionMessage("login.errors"));
			this.saveErrors(request, errors);
			return mapping.getInputForward();
		}
		
	}
	
}