第十一周作业
package com.gd.dao; import java.sql.Connection; import java.sql.DriverManager; import java.sql.PreparedStatement; import java.sql.ResultSet; import java.sql.SQLException; public class BaseDao { // 获取连接 protected Connection getConnection() { Connection con = null; try { Class.forName("com.mysql.jdbc.Driver"); // 建立连接 con = DriverManager.getConnection( "jdbc:mysql://localhost:3306/test", "root", "123456"); } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); } return con; } // 关闭连接 protected void closeAll(Connection con, PreparedStatement ps, ResultSet rs) { try { if (rs != null) rs.close(); if (ps != null) ps.close(); if (con != null) con.close(); } catch (SQLException e) { // TODO Auto-generated catch block e.printStackTrace(); } } }
package com.gd.dao; import java.sql.Connection; import java.sql.PreparedStatement; import java.sql.ResultSet; import java.sql.SQLException; import java.util.ArrayList; import java.util.List; import com.gd.entity.Msg; public class MsgDao extends BaseDao { // 1,插入邮件 // 2.删除邮件 // 3.修改邮件状态 // 4.按照接收者查询全部邮件 public List<Msg> getMailByReceiver(String name) { List<Msg> list = new ArrayList<Msg>(); Connection con = getConnection(); String sql = "select * from msg where sendto=?"; PreparedStatement ps=null; ResultSet rs=null; try { ps = con.prepareStatement(sql); ps.setString(1, name); rs = ps.executeQuery(); while (rs.next()) { Msg m = new Msg(); m.setMsgid(rs.getInt(1)); m.setUsername(rs.getString(2)); m.setTitle(rs.getString(3)); m.setMsgcontent(rs.getString(4)); m.setState(rs.getInt(5)); m.setSendto(rs.getString(6)); m.setMsg_create_date(rs.getDate(7)); list.add(m); } } catch (SQLException e) { e.printStackTrace(); }finally{ closeAll(con, ps, rs); } return list; } }
package com.gd.dao; import java.sql.Connection; import java.sql.PreparedStatement; import java.sql.ResultSet; import java.sql.SQLException; public class UsersDao extends BaseDao { // 关于用户的增删改查 // 1.登录 public boolean login(String uname, String upwd) { boolean f = false; Connection con = getConnection(); String sql = "select * from users where uname=? and upwd=?"; PreparedStatement ps = null; ResultSet rs = null; try { ps = con.prepareStatement(sql); ps.setString(1, uname); ps.setString(2, upwd); rs = ps.executeQuery(); if (rs.next()) f = true; } catch (SQLException e) { e.printStackTrace(); } finally { closeAll(con, ps, rs); } return f; } // 2.注册 public int register(String uname, String upwd) { Connection con = getConnection(); PreparedStatement ps = null; int x = 0; try { String sql = "insert into users(uname,upwd) values(?,?)"; ps = con.prepareStatement(sql); ps.setString(1, uname); ps.setString(2, upwd); x = ps.executeUpdate(); } catch (SQLException e) { e.printStackTrace(); } finally { closeAll(con, ps, null); } return x; } }
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>Insert title here</title> </head> <body > <script type="text/javascript"> function validate() { if (loginForm.uname.value == "") { alert("账号不能为空!"); return; } if (loginForm.upwd.value == "") { alert("密码不能为空!"); return; } loginForm.submit(); } </script> <form name="loginForm" action="dologin.jsp" method="post"> 用户名:<input type="text" name="uname" ><br> 密 码:<input type="password" name="upwd" ><br> <input type="button" value="登录" onClick="validate()"> </form> <hr> <a href="reg.jsp">返回注册</a> </body> </html>
<%@page import="com.gd.dao.UsersDao"%> <%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>Insert title here</title> </head> <body> <% request.setCharacterEncoding("utf-8"); String uname = request.getParameter("uname"); String upwd = request.getParameter("upwd"); UsersDao ud = new UsersDao(); if (ud.login(uname, upwd)) { session.setAttribute("uname",uname); request.getRequestDispatcher("main.jsp").forward(request,response); } else { out.print("登录失败,即将跳回登录页......"); response.setHeader("refresh", "3;url=denglu.jsp"); } %> </body> </html>
<%@page import="com.gd.dao.MsgDao"%> <%@page import="com.gd.dao.UsersDao"%> <%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>Insert title here</title> </head> <body> <% request.setCharacterEncoding("utf-8"); String uname = request.getParameter("uname"); String upwd = request.getParameter("upwd"); UsersDao ud = new UsersDao(); MsgDao md = new MsgDao(); if (ud.register(uname, upwd) > 0) { session.setAttribute("uname", uname); request.getRequestDispatcher("denglu.jsp").forward(request, response); } else { out.print("注册失败,请重新注册......."); response.setHeader("refresh", "3;url=reg.jsp"); } %> </body> </html>
<%@page import="com.gd.entity.Msg"%> <%@page import="java.util.List"%> <%@page import="com.gd.dao.MsgDao"%> <%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>Insert title here</title> </head> <body> <% String uname = (String) session.getAttribute("uname"); %> 欢迎你<% out.print(uname); %>使用邮箱 <hr> <table > <tr> <td>id</td> <td>发件人</td> <td>标题</td> <td>内容</td> <td>已读未读状态</td> <td>收件人</td> <td>发送时间</td> </tr> <% MsgDao md = new MsgDao(); List<Msg> list = md.getMailByReceiver(uname); for (Msg m : list) { %> <tr> <td><%=m.getMsgid()%></td> <td><%=m.getUsername()%></td> <td><%=m.getTitle()%></td> <td><%=m.getMsgcontent()%></td> <td> <% int state = m.getState(); if (state == 1) { %> <img src="image/yidu.png"> <% ; } else { %> <img src="image/weidu.png"> <% ; } %> </td> <td><%=m.getSendto()%></td> <td><%=m.getMsg_create_date()%></td> </tr> <% } %> </table> </body> </html>
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>Insert title here</title> </head> <body> <script type="text/javascript"> function validate() { if (registerForm.uname.value == "") { alert("账号不能为空!"); return; } if (registerForm.upwd.value == "") { alert("密码不能为空!"); return; } registerForm.submit(); } </script> <form name="registerForm" action="doreg.jsp" method="post"> 用户名:<input type="text" name="uname"><br> 密 码: <input type="password" name="upwd"><br> <input type="submit" value="注册"><hr> </form><hr> <a href="denglu.jsp">返回登录</a> </body> </html>