JSP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）

CREATE TABLE euser (
    uid INT  PRIMARY KEY auto_increment,
    uname VARCHAR (10),
    upwd VARCHAR (10)
)
CREATE TABLE msg (
    eid INT  PRIMARY KEY auto_increment,
    sender VARCHAR (10),
    addressee VARCHAR (10),
    title VARCHAR (10),
    content VARCHAR (10),
    send_time datetime,
    state INT
)
INSERT INTO msg ()
VALUES
    (
        101,
        '大哥',
        '小弟',
        '学习资料',
        'JSP',
        '2022-5-11 12:12:12',
        1
    );
INSERT INTO msg ()
VALUES
    (
                102,
        '大哥',
        '二弟',
        '学习资料',
        'Java',
        '2022-5-11 12:21:21',
        1
    );
INSERT INTO msg ()
VALUES
    (
                103,
        '大哥',
        '小弟',
        '学习资料',
        'JSP',
        '2022-5-11 12:00:12',
        0
    );
INSERT INTO msg ()
VALUES
    (
                104,
        '大哥老婆',
        '大哥',
        '学习资料',
        'Java',
        '2022-5-11 12:21:55',
        1
    );

2.建model层

entity,dao包

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/class", "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.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
 
public class dao extends baseDao{
     
    public boolean login(String name,String pwd){
        boolean f=false;
        Connection conn=getConnection();
        String sql="select * from euser 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 void reg(String uname, String upwd) {
        Connection conn = getConnection();
        PreparedStatement ps = null;
        try {
            String sql = "insert into euser(uname,upwd) values(?,?)";
            // 4.执行SQL语句
            ps = conn.prepareStatement(sql);
            ps.setString(1, uname);
            ps.setString(2, upwd);
            ps.executeUpdate();
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } finally {
            closeAll(conn, ps, null);
        }
 
    }
     
 
}

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 username=?";
        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) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }finally{
            closeAll(con, ps, rs);
        }        
        return list;
    }
    
}

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;

    @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;
    }

}

package Dao;

public class User {
    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;
    }

}

3.登陆，注册

登录显示全部信息

<%@ 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 (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">

        <b>用户名:</b> <input type="text" name="uname"><br> <b>密码:</b>
        <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 language="java" contentType="text/html; charset=utf-8"
    pageEncoding="utf-8"%>
<%@ page import="Dao.dao"%>
<!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>
<%
     
    String uname = request.getParameter("uname");
    String upwd = request.getParameter("upwd");
    String name = new String(uname.getBytes("ISO-8859-1"), "utf-8"); 
    dao ud=new dao();
    if(ud.login(name, upwd)){
        session.setAttribute("uname", name);
        request.getRequestDispatcher("main.jsp").forward(request, response);
    }else{
        out.print("登陆失败，三面后跳回登陆页...");
        response.setHeader("refresh", "3;url=login.jsp");
    }
 %>
</body>
</html>

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>

<html>
<head>

<title></title>
<%@ page import="Dao.msgDao"%>
<%@ page import="Dao.Msg"%>
<style type="text/css">
table {
    border: 1px black solid;
    width: 500px;
}
tr{
border: 1px black solid;
}
</style>
</head>

<body>

    <%
        String name = (String) session.getAttribute("uname");
    %>
    <%
        out.println(name);
    %>的邮箱：
    <br>
    <%
        msgDao m = new msgDao();
        List<Msg> list = m.getMailByReceiver(name);
    %>
    <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>

<%@ 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>
<form 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="submit" value="注册" />
            <a href="login.jsp">登录</a>
        </form>
</body>
</html>

4.截图演示

登陆前

 登陆后