Jsp第九次作业
1.建库，建表2个
用户表（id,用户名，密码）
邮件表（id,发件人，收件人，标题，内容，发送时间，状态）
2.建model层
entity,dao包
3.登陆，注册，登陆后显示全部邮件
package com.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 conn=null; try { Class.forName("com.mysql.jdbc.Driver"); // 2.建立连接 conn = DriverManager.getConnection( "jdbc:mysql://localhost:3306/test", "root", "root"); } catch (Exception e) { e.printStackTrace(); } return conn; } //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) { e.printStackTrace(); } } }
package com.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.entity.Msg; public class MsgDao extends BaseDao { public List<Msg> getMailByReceiver(String uname) { 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, uname); rs = ps.executeQuery(); while (rs.next()) { Msg m = new Msg(); m.setMsgid(rs.getInt("msgid")); m.setUsername(rs.getString("username")); m.setTitle(rs.getString("title")); m.setState(rs.getString("state")); m.setMsgcontent(rs.getString("msgcontent")); m.setSendto(rs.getString("sendto")); m.setMsg_create_date(rs.getDate("msg_create_date")); list.add(m); } } catch (SQLException e) { // TODO Auto-generated catch block e.printStackTrace(); } finally { closeAll(con, ps, rs); } return list; } }
package com.dao; import java.sql.Connection; import java.sql.PreparedStatement; import java.sql.ResultSet; import java.sql.SQLException; public class UsersDao extends BaseDao{ public boolean login(String name,String pwd){ boolean f=false; Connection conn=getConnection(); String sql="select * from users where uname=? and upwd=?"; PreparedStatement ps; try { ps = conn.prepareStatement(sql); ps.setString(1, name); ps.setString(2, pwd); ResultSet rs=ps.executeQuery(); if(rs.next()) f=true; closeAll(conn, ps, rs); } catch (SQLException e) { // TODO Auto-generated catch block e.printStackTrace(); } return f; } public int reg(String uname, String upwd) { Connection conn = getConnection(); int i=0; PreparedStatement ps = null; try { String sql = "insert into users(uname,upwd) values(?,?)"; ps = conn.prepareStatement(sql); ps.setString(1, uname); ps.setString(2, upwd); i=ps.executeUpdate(); } catch (SQLException e) { // TODO Auto-generated catch block e.printStackTrace(); } finally { closeAll(conn, ps, null); } return i; } }
<%@page import="com.dao.UsersDao"%> <%@ page contentType="text/html;charset=UTF-8" language="java" %> <html> <head> <title>Title</title> </head> <body> <% String uname = request.getParameter("uname"); String upwd =request.getParameter("upwd"); UsersDao usersDao=new UsersDao(); if(usersDao.login(uname, upwd)){ session.setAttribute("uname", uname); request.getRequestDispatcher("main2.jsp").forward(request, response); } else{ out.print("登录失败,5s后跳转登录页面"); response.setHeader("refresh", "5;url=login.jsp"); } %> </body> </html>
<%@ page contentType="text/html;charset=UTF-8" language="java" %> <%@page import="com.dao.MsgDao"%> <%@page import="com.dao.UsersDao"%> <html> <head> <title>Title</title> </head> <body> <% String uname = request.getParameter("uname"); String upwd = request.getParameter("upwd"); UsersDao usersDao = new UsersDao(); int i=usersDao.reg(uname, upwd); if(i>0){ out.print("注册成功，即将跳到登录页....."); response.setHeader("refresh", "2;url=login.jsp"); }else{ out.print("注册失败，即将跳回注册页....."); response.setHeader("refresh", "2;url=reg.jsp"); } %> </body> </html>
<%@ page contentType="text/html;charset=UTF-8" language="java" %> <html> <head> <title>Title</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()"> <a href="reg.jsp">注册</a> </form> </body> </html>
<%@page import="com.entity.Msg"%> <%@page import="com.dao.MsgDao"%> <%@ page import="java.util.List" %> <%@ page contentType="text/html;charset=UTF-8" language="java" %> <html> <head> <title></title> </head> <body> <%String uname=(String)session.getAttribute("uname"); %> 首页！！欢迎你<%=uname %> <table height="20px" width="100%" align="center" border="1"> <tr> <td>发件人</td> <td>主题</td> <td>状态</td> <td>时间</td> </tr> <% MsgDao md=new MsgDao(); List<Msg> list=md.getMailByReceiver(uname); for(Msg m:list) {%> <tr> <td><%=m.getUsername() %></td> <td><%=m.getTitle() %></td> <td><% String state=m.getState(); if(state=="s"){ %> 已读消息 <%; }else{%> 未读 <%; } %></td> <td><%=m.getMsg_create_date() %></td> </tr> <%} %> </table> </body> </html>
<%@ page contentType="text/html;charset=UTF-8" language="java" %> <html> <head> <title>Title</title> </head> <body> <script type="text/javascript"> function validate(){ if(resForm.uname.value==""){ alert("账号不能为空!"); return; } if(resForm.upwd.value==""){ alert("密码不能为空!"); return; } resForm.submit(); } </script> <form name="resForm" action="doreg.jsp" method="post"> <b>用户名</b> <input type="text" name="uname" /> <br /> <b>密码</b> <input type="text" name="upwd" /> <br /> <input type="button" value="注册" onClick="validate()"> <a href="login.jsp">登录</a> </form> </body> </html>
package com.entity; public class Users{ int id; String uname; String upwd; public int getId() { return id; } public void setId(int id) { this.id = id; } public String getUname() { return uname; } public void setUname(String uname) { this.uname = uname; } public String getUpwd() { return upwd; } public void setUpwd(String upwd) { this.upwd = upwd; } }
package com.entity; import java.util.Date; public class Msg { private int msgid; private String username; private String title; private String msgcontent; private String state; private String sendto; Date msg_create_date; public int getMsgid() { return msgid; } public void setMsgid(int msgid) { this.msgid = msgid; } public String getUsername() { return username; } public void setUsername(String username) { this.username = username; } public String getTitle() { return title; } public void setTitle(String title) { this.title = title; } public String getMsgcontent() { return msgcontent; } public void setMsgcontent(String msgcontent) { this.msgcontent = msgcontent; } public String getState() { return state; } public void setState(String state) { this.state = state; } public String getSendto() { return sendto; } public void setSendto(String sendto) { this.sendto = sendto; } public Date getMsg_create_date() { return msg_create_date; } public void setMsg_create_date(Date msg_create_date) { this.msg_create_date = msg_create_date; } }
