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

BaseDao.java

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/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();
        }
    }
    
}

MsgDao.java

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;
import entity.Msg;
public class MsgDao extends BaseDao{
    //关于邮件的增删改查    
    //添加邮件(写邮件,回复邮件都调用,邮件状态为0,时间为系统当前时间)
    
    
    //根据id删除邮件
    
    
    //根据id修改邮件状态(统一改成1)
    
    
    //根据收件人查看全部邮件
    public List<Msg> getMailByReceiver(String name){
        List<Msg> list=new ArrayList<Msg>();
        Connection con=getConnection();
        String sql="select * from msg where username=?";
        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msg对象,对象放到集合中
                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) {
            // TODO Auto-generated catch block            e.printStackTrace();
        }finally{
            closeAll(con, ps, rs);
        }        
        return list;
    }
    
    
UserDao.java
package 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,用到什么功能鞋什么
    
    //登陆
    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;
    }    
    
    //注册
    public int logon(String uname, int upwd) {
        Connection conn = getConnection();
        PreparedStatement ps = null;
        int r = -1;
        try {
            String sql = "insert into users(uname,upwd) values(?,?)"; // 2个占位符
            // 4.执行SQL语句
            ps = conn.prepareStatement(sql);
            ps.setString(1, uname);
            ps.setInt(2, upwd);
            r = ps.executeUpdate();// 增删改都用这个
        } catch (SQLException e) {
            // TODO Auto-generated catch block            e.printStackTrace();
        } finally {
            closeAll(conn, ps, null);
        }
        return r;

    }
    
    

}

Msg.java

package entity;
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;
    @Override
    public String toString() {
        return "Msg [msgid=" + msgid + ", username=" + username + ", title="
                + title + ", msgcontent=" + msgcontent + ", state=" + state
                + ", sendto=" + sendto + ", msg_create_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;
    }

}

Users.java

 
package 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;
    }

}

login.jsp

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<html><head>
<title>My JSP 'student.jsp' starting page</title>
</head><%
    %><body>
    <form action="login_link.jsp">
        姓名:<input type="text" name="name" /> <br>密码:<input type="password"
            name="pwd" /> <br><input type="submit" value="登录" />
    </form>
    <form action="logon.jsp">
        <input type="submit" value="注册" />
    </form></body></html>

login_link.jsp

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<html><head>
<title></title>
</head><%@ page import="dao.UsersDao"%><%
    String name = request.getParameter("name");
    String pwd = request.getParameter("pwd");
    String uname = new String(name.getBytes("ISO-8859-1"), "utf-8");
    try {
        UsersDao usersdao = new UsersDao();
        if (usersdao.login(uname, pwd)) {
            String n = (String) session.getAttribute("uname");
            if (n == null) {
                session.setAttribute("uname", name);
            }
            request.getRequestDispatcher("mail.jsp").forward(request,
                    response);

        } else {
            out.println("登陆失败!");
            out.println("三秒后跳转到登录页面...");
            response.setHeader("refresh", "3;url=login.jsp");
        }
    } catch (Exception e) {
        out.println("异常!!");
        out.println("三秒后跳转到登录页面...");
        response.setHeader("refresh", "3;url=login.jsp");
    }%><body>
    <a href="login.jsp">返回</a></body></html>

logon.jsp

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<html><head>
<title></title>
</head><%
    %><body>
    <h3>请输入信息来完成注册...</h3>
    <form action="logon_link.jsp">
        用户名:<input type="text" name="name" /> 密码:<input type="password"
            name="pwd" /> <input type="submit" value="注册" />
    </form>
    <a href="login.jsp">返回</a></body></html>

logon_link.jsp

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<html><head>
<title>My JSP 'slogon_link.jsp' starting page</title>
</head><%@ page import="dao.UsersDao"%><%
    String name = request.getParameter("name");
    String upwd = request.getParameter("pwd");
    String uname=new String(name.getBytes("ISO-8859-1"),"utf-8");
    int pwd = Integer.parseInt(upwd);
    UsersDao usersdao=new UsersDao();
    if (usersdao.logon(uname, pwd) != -1) {
        out.println("注册成功!");
        out.println("三秒后跳转到登录页...");
        response.setHeader("refresh", "3;url=login.jsp");
    } else {
        out.println("注册失败!");
        out.println("三秒后跳转到登录页...");
        response.setHeader("refresh", "3;url=login.jsp");
    }%><body></body></html>

mail.jsp

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<html><head>
<title></title><%@ page import="dao.MsgDao"%><%@ page import="entity.Msg"%><style type="text/css">
table {
    border: 1px black solid;
    width: 500px;}</style></head>
<body>

    <%
        String name = (String) session.getAttribute("uname");
        String uname = new String(name.getBytes("ISO-8859-1"), "utf-8");
    %>
    <%
        out.println(uname);
    %>的邮箱:
    <br>
    <%
        MsgDao m = new MsgDao();
        List<Msg> list = m.getMailByReceiver(uname);
    %>
    <table>
        <tr>
            <td>发件人</td>
            <td>主题</td>
            <td>状态</td>
            <td>时间</td>
        </tr>
        <%
            for (int i = 0; i < list.size(); i++) {
        %>
        <tr>
            <td><%=list.get(i).getUsername()%></td>
            <td><%=list.get(i).getTitle()%></td>
            <td>
                <%
                    if (list.get(i).getState() == 0) {
                %><img src="image/weidu.png" /> <%
     } else {
 %> <img src="image/yidu.png" /> <%
     }
 %>
            </td>
            <td><%=list.get(i).getMsg_create_date()%></td>
            <%
                }
            %>
        
    </table></body></html>

 

posted @ 2022-05-15 20:52  五谷鸡爪🥳  阅读(4)  评论(0编辑  收藏  举报