JSP简单的邮件系统

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

 

 

 

 

 

 

 

//mail_BaseDao.java

public class mail_BaseDao {
    protected Connection getConnection() {
        Connection conn = null;
        try {
            Class.forName("com.mysql.cj.jdbc.Driver");
            conn = DriverManager.getConnection(
                    "jdbc:mysql://localhost:3306/mailbox", "root", "123456");
        } catch (Exception e) {
            e.printStackTrace();
        }
        return conn;
    }

    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();
        }
    }
}

//mail_UserDao.java

public class mail_UserDao extends mail_BaseDao{
    public boolean login(String name, String pwd) {
        boolean f = false;
        Connection conn = getConnection();
        String sql = "select * from tb_user where username=? and password=?";
        PreparedStatement ps = null;
        ResultSet rs = null;
        try {
            ps = conn.prepareStatement(sql);
            ps.setString(1, name);
            ps.setString(2, pwd);
            rs = ps.executeQuery();
            if (rs.next())
                f = true;
        } catch (SQLException e) {
            e.printStackTrace();
        } finally {
            closeAll(conn, ps, rs);
        }
        return f;
    }

    public void reg(String username, String password) {
        Connection conn = getConnection();
        PreparedStatement ps = null;
        try {
            String sql = "insert into tb_user(username,password) values(?,?)";
            ps = conn.prepareStatement(sql);
            ps.setString(1, username);
            ps.setString(2, password);
            ps.executeUpdate();
        } catch (SQLException e) {
            e.printStackTrace();
        } finally {
            closeAll(conn, ps, null);
        }

    }
}

//MailDao.java

public class MailDao extends mail_BaseDao {
    public List<mail> getMailByReceiver(String name){
        List<mail> list=new ArrayList<mail>();
        Connection conn=getConnection();
        String sql="select * from tb_mail where addressee=?";
        PreparedStatement ps=null;
        ResultSet rs=null;
        try {
            ps = conn.prepareStatement(sql);
            ps.setString(1, name);
            rs=ps.executeQuery();
            while(rs.next()){
                mail m=new mail();
                m.setId(rs.getInt(1));
                m.setSender(rs.getString(2));
                m.setAddressee(rs.getString(3));
                m.setTitle(rs.getString(4));
                m.setContent(rs.getString(5));
                m.setTime(rs.getString(6));
                m.setState(rs.getInt(7));
                list.add(m);
            }

        } catch (SQLException e) {
            e.printStackTrace();
        }finally{
            closeAll(conn, ps, rs);
        }
        return list;
    }
}

//MailUsers.java

public class MailUsers {
    private int id;
    private String username;
    private String password;

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    @Override
    public String toString() {
        return "MailUsers{" +
                "id=" + id +
                ", username='" + username + '\'' +
                ", password='" + password + '\'' +
                '}';
    }
}

//mail

public class mail {

    private Integer id;
    private String Sender;
    private String addressee;
    private String title;
    private String content;
    private String time;
    private Integer state;

    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    public String getSender() {
        return Sender;
    }

    public void setSender(String sender) {
        Sender = sender;
    }

    public String getAddressee() {
        return addressee;
    }

    public void setAddressee(String addressee) {
        this.addressee = addressee;
    }

    public String getTitle() {
        return title;
    }

    public void setTitle(String title) {
        this.title = title;
    }

    public String getContent() {
        return content;
    }

    public void setContent(String content) {
        this.content = content;
    }

    public String getTime() {
        return time;
    }

    public void setTime(String time) {
        this.time = time;
    }

    public Integer getState() {
        return state;
    }

    public void setState(Integer state) {
        this.state = state;
    }

    @Override
    public String toString() {
        return "mail{" +
                "id=" + id +
                ", Sender='" + Sender + '\'' +
                ", addressee='" + addressee + '\'' +
                ", title='" + title + '\'' +
                ", content='" + content + '\'' +
                ", time='" + time + '\'' +
                ", state=" + state +
                '}';
    }
}

//Login.jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>登录</title>
</head>
<body>
<script type="text/javascript">
    function check() {
        if (login.account.value==""){
            alert("请输入账号!");
            return;
        }else if(login.psw.value=="") {
            alert("请输入密码!");
            return;
        }
        login.submit();
    }
</script>
<form action="checkLog.jsp" method="post" name="login">
    账号:<input type="text" name="account"><br>
    密码:<input type="password" name="psw"><br>
    <input type="button" value="登录" onclick="check()">
</form><br>
<form action="Register.jsp" method="post">
    <input type="submit" value="立即注册账户">
</form>
</body>
</html>

//checkLog.jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
<%
    String account=request.getParameter("account");
    String psw=request.getParameter("psw");
    mail_UserDao mail_userDao = new mail_UserDao();
    if (mail_userDao.login(account,psw)){
        session.setAttribute("account",account);
        request.getRequestDispatcher("LogSuccess.jsp").forward(request,response);
    }else {
        request.getRequestDispatcher("LogFail.jsp").forward(request,response);
    }
%>
</body>
</html>

//Register.jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>注册</title>
</head>
<body>
<script type="text/javascript">
    function check() {
        if (login.account.value==""){
            alert("请输入账号!");
            return;
        }else if(login.psw.value=="") {
            alert("请输入密码!");
            return;
        }else if(login.psw1.value=="") {
            alert("请再次输入密码!");
            return;
        }
        var pwd = document.getElementById("pwd").value;
        var pwd1 = document.getElementById("pwd1").value;
        if (pwd==pwd1){
            alert("注册成功!");
            login.submit();
        }else {
            alert("两次输入密码不一样!");
            return;
        }
    }
</script>
<form action="checkReg.jsp" method="post" name="login">
    请输入账号:<input type="text" name="account"><br>
    请输入密码:<input type="password" name="psw" id="pwd"><br>
    请再次输入密码:<input type="password" name="psw1" id="pwd1"><br>
    <input type="button" value="注册" onclick="check()">
</form>
<form action="Login.jsp" method="post">
    <input type="submit" value="已有账号?前往登录">
</form>
</body>
</html>

//checkReg.jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
<%
    String account=request.getParameter("account");
    String psw=request.getParameter("psw");
    String psw1=request.getParameter("psw1");
    if (psw.equals(psw1)) {
        mail_UserDao mail_userDao = new mail_UserDao();
        mail_userDao.reg(account,psw);
        request.getRequestDispatcher("Login.jsp").forward(request,response);
    } else {
        request.getRequestDispatcher("Register.jsp").forward(request,response);
    }
%>
</body>
</html>

//LogSuccess.jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>我的邮件</title>
</head>
<body>
<%
    String account = (String) session.getAttribute("account");
    MailDao mailDao = new MailDao();
    List<mail> mails = mailDao.getMailByReceiver("JJ");
%>
<h1>欢迎!<%=account%>
</h1>
<table border="1">
    <tr>
        <td>发件人</td>
        <td>标题</td>
        <td>状态</td>
        <td>时间</td>
    </tr>
    <%
        for (int i = 0; i < mails.size(); i++) {
            mail m = mails.get(i);
    %>
    <tr>
        <td><%out.print(m.getSender());%></td>
        <td><%out.print(m.getTitle());%></td>
        <td><%
            if (m.getState() == 1) {
                out.print("已读");
            } else {
                out.print("未读");
            }
        %></td>
        <td><%out.print(m.getTime());%></td>
    </tr>
    <%}%>
</table>
</body>
</html>

//LogFail.jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>登陆失败</title>
</head>
<body>
<h1>登陆失败</h1>
</body>
</html>