useraction.java

java学习的必要的资料,servlet的说明很好

package com.estore.struts.action;

import java.sql.Date;

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

import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.actions.DispatchAction;

import com.estore.struts.Globals;
import com.estore.struts.entity.User;
import com.estore.struts.entity.UserItem;
import com.estore.struts.service.UserService;
import com.estore.struts.utils.ServiceFactory;

public class UserAction extends DispatchAction {
	
	private UserService userService = (UserService) ServiceFactory
			.getInstance().getService(Globals.USER_SERVICE);

	/*
	 * 注册一个新用户，此方法同时插入两个动作：
	 * 向数据库中保存用户信息，以及向数据库中保存用户的基本信息UserItem；
	 */
	public ActionForward register(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response)
			throws Exception {
		
		String code = request.getParameter("code");
		
		String saveCode = (String) request.getSession().getAttribute("code");
		if(saveCode!=null && !saveCode.equalsIgnoreCase(code)){
			response.sendRedirect( request.getContextPath() + "/pages/register.jsp");
			return null;
		}
		
		User user = new User();

		user.setUsername(request.getParameter("userName"));
		user.setPassword(request.getParameter("password"));
		user.setCreatetime(new Date(System.currentTimeMillis()));
		user.setState(1);
		user.setRole(1);

		UserItem userItem = new UserItem();

		userItem.setItem_name(request.getParameter("userName"));
		userItem.setItem_address(request.getParameter("address"));
		userItem.setItem_postcode(request.getParameter("postcode"));
		userItem.setItem_officephone(request.getParameter("officephone"));
		userItem.setItem_mobilephone(request.getParameter("mobilephone"));
		userItem.setItem_email(request.getParameter("email"));
		
		/*
		 * 建立起关系
		 */
		userItem.setUser(user);
		user.addUserItem(userItem);
		
		userService.register(user);
		
		return mapping.findForward("registersuccess");
	}

	/*
	 * 用户登录方法
	 */
	public ActionForward login(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response)
			throws Exception {

		String username = request.getParameter("userid").trim();
		String password = request.getParameter("password").trim();

		if (userService.isLoginCorrect(username, password)) {
			User user = userService.getUserByName(username);
			/*
			 * 只有在用户登录的时候才创建一个session,并且把用户的信息存放到session中；
			 * 同时sessionListener也会把car同时也放到session中,这样能保证为每一个来
			 * 网站需要购物的用户分配一个session,一个购物车,并且也可以利用session来 跟踪用户.
			 */
			HttpSession session = ((HttpServletRequest) request).getSession(true);

			session.setAttribute("user", user);
			return mapping.findForward("loginsuccess");
		} else {
			String message = "用户名或者密码错误!";
			request.setAttribute("message", message);
			return mapping.findForward("loginfailed");
		}
		
	}

	/*
	 * 查看用户的详细信息,先从session中获得user用户,
	 * 然后根据用户再从数据库中获得用户的详细信息useritems;
	 */
	public ActionForward userinfo(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response)
			throws Exception {

		HttpSession session = request.getSession();
		User user = (User) session.getAttribute("user");

		request.setAttribute("useritems", userService.getUserItem(user));
		return mapping.findForward("userinfo");
	}

	/*
	 * 可以让用户新添加一个新的收货地址,
	 * 然后再转向
	 */
	public ActionForward addUserItem(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response)
			throws Exception {

		HttpSession session = request.getSession();
		User user = (User) session.getAttribute("user");
		
		UserItem useritem = new UserItem();
		
		useritem.setUser(user);
		useritem.setItem_name(request.getParameter("username").trim());
		useritem.setItem_address(request.getParameter("address").trim());
		useritem.setItem_postcode(request.getParameter("postcode").trim());
		useritem.setItem_officephone(request.getParameter("officephone").trim());
		useritem.setItem_mobilephone(request.getParameter("mobilephone").trim());
		useritem.setItem_email(request.getParameter("email").trim());

		userService.addUserItem(useritem);
		
		request.setAttribute("useritems", userService.getUserItem(user));
		return mapping.findForward("adduseritem");
	}

	/*
	 * 删除用户指定的一个详细信息；
	 */
	public ActionForward deleteUserItem(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response)
			throws Exception {
		HttpSession session = request.getSession();
		User user = (User) session.getAttribute("user");
		Integer id = Integer.parseInt(request.getParameter("itemid"));
		if (id == null) {
			request.setAttribute("message","删除时出错,没有该收货人!请<a onclick='javascript:history.go(-1)'>返回</a>!");
			return mapping.findForward("error");
		}

		userService.deleteUserItem(id);
		return mapping.findForward("deleteuseritem");
	}

	/*
	 * 用户退出系统并做一些清理工作；
	 */
	public ActionForward logout(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response)
			throws Exception {
		
		HttpSession session = request.getSession();
		session.removeAttribute("user");
		session.removeAttribute("cart");

		return mapping.findForward("logout");
	}

	public ActionForward report(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response)
			throws Exception {
		
		HttpSession session = request.getSession();
		User user = (User) session.getAttribute("user");

		/*
		 * 判断用户的登录身份，只有管理员才能访问此功能；
		 */
		if(user.getRole() != 0){
			request.setAttribute("message","请以管理员的身份重新<a href='/EC_Port/pages/login.jsp' style='color:red;'>登录</a>!&nbsp;请<a onclick='javascript:history.go(-1)' style='color:red;'>返回</a>!");
			return mapping.findForward("error");
		}

		return mapping.findForward("report");
	}
}