package com.fj.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 uname, String upwd) {
boolean f = false;
Connection con = getConnection();
String sql = "select * from users where uname=? and upwd=?";
PreparedStatement ps = null;
ResultSet rs = null;
try {
ps = con.prepareStatement(sql);
ps.setString(1, uname);
ps.setString(2, upwd);
rs = ps.executeQuery();
if (rs.next())
f = true;
} catch (SQLException e) {
e.printStackTrace();
} finally {
closeAll(con, ps, rs);
}
return f;
}
public int register(String uname, String upwd) {
Connection con = getConnection();
PreparedStatement ps = null;
int x = 0;
try {
String sql = "insert into users(uname,upwd) values(?,?)";
ps = con.prepareStatement(sql);
ps.setString(1, uname);
ps.setString(2, upwd);
x = ps.executeUpdate();
} catch (SQLException e) {
e.printStackTrace();
} finally {
closeAll(con, ps, null);
}
return x;
}
}
package com.fj.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 com.ym.entity.Msg;
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(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) {
e.printStackTrace();
}finally{
closeAll(con, ps, rs);
}
return list;
}
}
package com.fj.dao;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
public class BaseDao {
protected Connection getConnection() {
Connection con = null;
try {
Class.forName("com.mysql.jdbc.Driver");
con = DriverManager.getConnection(
"jdbc:mysql://localhost:3306/test", "root", "123456");
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return con;
}
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();
}
}
}
<body bgcolor=#ffccff>
<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" ><br>
<input type="button" value="登录" onClick="validate()">
</form>
<hr>
<a href="reg.jsp">返回注册</a>
</body>
<body>
<%
request.setCharacterEncoding("utf-8");
String uname = request.getParameter("uname");
String upwd = request.getParameter("upwd");
UsersDao ud = new UsersDao();
if (ud.login(uname, upwd)) {
session.setAttribute("uname",uname);
request.getRequestDispatcher("main.jsp").forward(
request,response);
} else {
out.print("登录失败，即将跳回登录页......");
response.setHeader("refresh", "3;url=denglu.jsp");
}
%>
</body>
<body bgcolor=#ffccff>
<script type="text/javascript">
function validate() {
if (registerForm.uname.value == "") {
alert("账号不能为空！");
return;
}
if (registerForm.upwd.value == "") {
alert("密码不能为空！");
return;
}
registerForm.submit();
}
</script>
<form name="registerForm" action="doreg.jsp" method="post">
用户名:<input type="text" name="uname"><br>
密 码: <input type="password" name="upwd"><br>
<input type="submit" value="注册"><hr>
</form><hr>
<a href="denglu.jsp">返回登录</a>
</body>
<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.register(uname, upwd) > 0) {
session.setAttribute("uname", uname);
request.getRequestDispatcher("denglu.jsp").forward(request,
response);
} else {
out.print("注册失败，请重新注册.......");
response.setHeader("refresh", "3;url=reg.jsp");
}
%>
</body>
<body bgcolor=#ffccff>
<%
String uname = (String) session.getAttribute("uname");
%>
欢迎你<%
out.print(uname);
%>使用邮箱
<hr>
<table border="2px solid black">
<tr>
<td>id</td>
<td>发件人</td>
<td>标题</td>
<td>内容</td>
<td>已读未读状态</td>
<td>收件人</td>
<td>发送时间</td>
</tr>
<%
MsgDao md = new MsgDao();
List<Msg> list = md.getMailByReceiver(uname);
for (Msg m : list) {
%>
<tr>
<td><%=m.getMsgid()%></td>
<td><%=m.getUsername()%></td>
<td><%=m.getTitle()%></td>
<td><%=m.getMsgcontent()%></td>
<td>
<%
int state = m.getState();
if (state == 1) {
%> <img src="image/yidu.png"> <%
;
} else {
%> <img src="image/weidu.png"> <%
;
}
%>
</td>
<td><%=m.getSendto()%></td>
<td><%=m.getMsg_create_date()%></td>
</tr>
<%
}
%>
</table>
</body>
