第十一周作业

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

5个页面   login,dologin,reg,doreg,main

package dao;

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/mycollege?useSSL=false", "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 dao;

import java.util.Date;

public class Msg {
    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 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;

public class MsgDao extends BaseDao{
    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("msgid"));
                m.setUsername(rs.getString("username"));
                m.setTitle(rs.getString("title"));
                m.setState(rs.getInt("state"));
                m.setMsgcontent(rs.getString("msgcontent"));
                m.setSendto(rs.getString("sendto"));
                m.setMsg_create_date(rs.getDate("mgs_create_date"));
                list.add(m);                
            }            
            
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }finally{
            closeAll(con, ps, rs);
        }        
        return list;
    }
}

package dao;

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 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="dao.MsgDao"%>
<%@page import="dao.UsersDao"%>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%
    request.setCharacterEncoding("utf-8");
    String uname = request.getParameter("uname");
    String upwd = request.getParameter("upwd");
    UsersDao ud=new UsersDao();
    MsgDao md=new MsgDao();
    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=denglu.jsp");
    }
 %>

<%@ page language="java" contentType="text/html; charset=utf-8"
    pageEncoding="utf-8"%>
<%@page import="dao.MsgDao"%>
<%@page import="dao.UsersDao"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; 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.reg(uname, upwd)>0){    
        session.setAttribute("uname", uname);    
        request.getRequestDispatcher("denglu.jsp").forward(request, response);
    }else{
        out.print("登陆失败，即将跳回登陆页.....");
        response.setHeader("refresh", "5;url=shibai.jsp");
    }
 %>
</body>
</html>

<%@ 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 name="loginForm" action="dologin.jsp" method="post">
        
    用户名:<input type="text" name="uname"><br> 
    密码: <input  type="password" name="upwd">
    
        <input type="button" value="登录" onClick="validate()">    
        <a href="res.jsp">注册</a>
    </form>

</body>
</html>

<%@ page language="java" contentType="text/html; charset=Utf-8"
    pageEncoding="utf-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Insert title here</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="doRes.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="denglu.jsp">登录</a>
        </form>
</body>
</html>