在线购书系统java实现

package cn.tsp2c.shop.servlet; import java.io.IOException; import java.io.PrintWriter; import java.sql.Connection; import java.sql.PreparedStatement; import java.sql.ResultSet; import java.sql.SQLException; import java.util.Date; import javax.naming.ldap.Rdn; import javax.servlet.RequestDispatcher; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.servlet.http.HttpSession; import org.apache.log4j.Logger; import cn.tsp2c.shop.dao.MemberDao; import cn.tsp2c.shop.domain.Member; import cn.tsp2c.shop.exception.AuthUserException; import cn.tsp2c.shop.exception.DBException; import cn.tsp2c.shop.exception.MemberException; import cn.tsp2c.shop.service.MemberService; import cn.tsp2c.shop.util.Constant; import cn.tsp2c.shop.util.DBUtil; /** * 商城会员管理servlet * * @author lvxda * */ public class MemberServlet extends HttpServlet { /** * */ private static final long serialVersionUID = -3585918958960238973L; private static final Logger log = Logger.getLogger(MemberServlet.class); public void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { String action = req.getParameter("action"); if ("register".equals(action)) { try { register(req, resp); } catch (Exception e) { System.out.println("fdgdss"); log.error("注册会员失败", e); } } else if ("userExists".equals(action)) { userExists(req, resp); }else if("login".equals(action)){ Login(req,resp); } } private void Login(HttpServletRequest req, HttpServletResponse resp) { String password = req.getParameter("password"); String username = req.getParameter("username"); Member member=null; RequestDispatcher rd=null; String target="/index.jsp"; try { member=MemberService.getInstance().login(password, username); //TODO:用户登录 if(member==null){ req.setAttribute("MSG_LOGIN_ERROR", "你输入的用户名、密码不匹配，请重新输入！"); target="/member/login.jsp"; }else { HttpSession session=req.getSession(); session.setAttribute(Constant.MSG_LOGIN_ERROR, member); } }catch(AuthUserException e) { log.error("登录认证失败",e); target="/error.jsp"; req.setAttribute(Constant.MSG_REG_RERROR, e.getMessage()); } rd=req.getRequestDispatcher(target); try { rd.forward(req, resp); } catch (ServletException e) { log.error("登录认证失败",e); } catch (IOException e) { log.error("登录认证失败",e); } } private void userExists(HttpServletRequest req, HttpServletResponse resp) { String username = req.getParameter("username"); boolean b = false; PrintWriter pw = null; String desc = null; try { b = MemberService.getInstance().exist(username); if (b) { desc = "此用户名已注册"; } else { desc = "此用户名可用"; } resp.setCharacterEncoding("utf-8"); pw = resp.getWriter(); } catch (IOException e) { log.error("检查用户名是否存在时发生异常", e); b = false; desc = "检查用户名是否存在时发生异常"; } catch (MemberException e) { log.error("检查用户名是否存在时发生异常", e); b = false; desc = "检查用户名是否存在时发生异常"; } String jsonStr = new StringBuffer().append("{").append( "\"userExists\":\"").append(String.valueOf(b)).append( "\",\"desc\":\"").append(desc).append("\"}").toString(); log.debug(jsonStr); pw.println(jsonStr); pw.close(); } // 注册会员 public void register(HttpServletRequest req, HttpServletResponse resp) throws MemberException { String password = req.getParameter("password"); String username = req.getParameter("username"); String gender = req.getParameter("gender"); String email = req.getParameter("email"); Date regdate = new Date();// req.getParameter("password"); //注册日期 String phone = req.getParameter("phone"); Date birthday = null; // 出生日期 int scorenum = 0; int grade = 1; Member member = new Member(password, username, gender, email, regdate, phone, birthday, scorenum, grade); String target = "/error.jsp"; RequestDispatcher rd = null; boolean isError = false; try { boolean b = MemberService.getInstance().exist(username); if (b) {//用户已注册 req.setAttribute(Constant.MSG_REG_RERROR, "用户已注册"); rd = req.getRequestDispatcher(target); rd.forward(req, resp); return; } //注册用户 MemberService.getInstance().add(member); req.setAttribute(Constant.MSG_REG_OK, "用户注册成功"); target = "/success.jsp"; rd = req.getRequestDispatcher(target); rd.forward(req, resp); } catch (MemberException e) { log.error("注册会员失败", e); isError = true; } catch (ServletException e) { log.error("注册会员失败", e); isError = true; } catch (IOException e) { log.error("注册会员失败", e); isError = true; } if (isError) { try { // req.setAttribute(Constant.MSG_REG_RERROR, "用户已注册"); rd = req.getRequestDispatcher(target); rd.forward(req, resp); } catch (ServletException e) { log.error("注册会员失败", e); e.printStackTrace(); } catch (IOException e) { log.error("注册会员失败", e); e.printStackTrace(); } } } public void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { doPost(req, resp); } }