jsp11周
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.bk.dog; import java.sql.Connection; import java.sql.DriverManager; import java.sql.PreparedStatement; import java.sql.ResultSet; import java.sql.SQLException; import java.util.List; import javax.naming.Context; import javax.naming.InitialContext; import javax.naming.NamingException; import javax.sql.DataSource; 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?useUnicode=true&characterEncoding=utf8", "root", "jth12345"); } 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.bk.dog; 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.bk.e.Mail; public class MailDao extends BaseDao{ public List<Mail> getMailByReceiver(String name){ List<Mail> list=new ArrayList<Mail>(); 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()){ //每读取一行，创建一个对象，对象放到集合中 Mail m=new Mail(); 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) { // TODO Auto-generated catch block e.printStackTrace(); }finally{ closeAll(con, ps, rs); } return list; } } package com.bk.dog; 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);//第一个？赋值为name ps.setString(2, pwd); ResultSet rs=ps.executeQuery(); if(rs.next())//查到结果了 f=true; closeAll(conn, ps, rs); } catch (SQLException e) { // TODO Auto-generated catch block e.printStackTrace(); } return f; } public int register(String uname, String upwd) { Connection con = getConnection(); PreparedStatement ps = null; int s = 0; try { String sql = "insert into users(uname,upwd) values(?,?)"; ps = con.prepareStatement(sql); ps.setString(1, uname); ps.setString(2, upwd); s = ps.executeUpdate(); } catch (SQLException e) { e.printStackTrace(); } finally { closeAll(con, ps, null); } return s; } } package com.bk.e; import java.util.Date; public class Mail { private int msgid; private String username; private String title; private String msgcontent; private int state; private String sendto; private 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 int getState() { return state; } public void setState(int 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; } } package com.bk.e; 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; } } 登录jsp <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <html> <head> <title>My JSP 'index.jsp' starting page</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 action="logt.jsp"> 用户名：<input type="text" name="uname" /> 密码：<input type="password" name="upwd" /><input type="submit" value="登录" /> </form> <form action="register.jsp"> <br> 没有账号需要注册?<input type="submit" value="注册" /> </form> </body> </html> Logt <%@page import="com.bk.dog.MailDao"%> <%@page import="com.bk.dog.UsersDao"%> <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <html> <head> <title>My JSP 'index.jsp' starting page</title> </head> <body> <% request.setCharacterEncoding("utf-8"); String uname=request.getParameter("uname"); String upwd=request.getParameter("upwd"); UsersDao ud=new UsersDao(); MailDao md=new MailDao(); if(ud.login(uname, upwd)){ session.setAttribute("uname", uname); request.getRequestDispatcher("main.jsp").forward(request, response); }else{ out.print("登陆失败，即将跳回登陆页....."); response.setHeader("refresh", "5;url=log.jsp"); } %> </body> </html> 注册 <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <title>My JSP 'index.jsp' starting page</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 action="registertest.jsp"> <b>用户名</b> <input type="text" name="uname" /> <br /> <b>密码</b> <input type="text" name="upwd" /> <br /> <input type="submit" value="注册" /> <a href="log.jsp">登录</a> </form> </body> </html> <%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <%@page import="com.bk.dog.UsersDao" %> <%@page import="com.bk.dog.MailDao" %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <title>My JSP 'index.jsp' starting page</title> </head> <body> <% request.setCharacterEncoding("utf-8"); String uname = request.getParameter("uname"); String upwd = request.getParameter("upwd"); UsersDao ud=new UsersDao(); MailDao md=new MailDao(); if(ud.register(uname, upwd)>0){ session.setAttribute("uname", uname); request.getRequestDispatcher("log.jsp").forward(request, response); }else{ out.print("注册失败，即将跳回注册页....."); response.setHeader("refresh", "3;url=register.jsp"); } %> </body> </html>
