登录界面：
HTML代码如下：
<body id="p2"> <p id="p5" align="right"> <a href="homework_map.html">美食图鉴</a> <a href="href5_baidu.html">美食咨询</a> </p> <p id="p1" align="center">人间烟火</p> <table width="100%"> <tr> <td align="center"> <form action="/dcan/zcservlet"> <label> 账号：<input type="text" size="35px" id="p3" name="id"><br><br> 密码：<input type="password" size="35px" width="20" id="p3" name="password"><br><br> <input type="submit" value="登录" name="1"> <input type="submit" value="注册" name="1"> </label> </form> </td> </tr> </table> <address id="p4"> 宅急送美食广场 邮箱：88888888@qq.com<br> <a href="mailto:1434881861@qq.com cc=163.com&bcc=123456789@qq.com&subject=20%again">问题反馈</a>.<br> </address> </body>
具体效果：
登录后进入后台进行用户认证，判定是否存在或者密码是否正确：
req.setCharacterEncoding("UTF-8");
resp.setCharacterEncoding("UTF-8");
resp.setContentType("text/html;charset=UTF-8");
//获得数据库的连接
DBUtil util = new DBUtil();
Connection conn = null;
//数据库操作类
Statement stat = null;
ResultSet rs = null;
try {
conn = util.getconn();
stat = conn.createStatement();
//获取按钮值
String value = req.getParameter("1");
if("登录".equals(value)) {
//登录页面
String id = req.getParameter("id");
String password = req.getParameter("password");
int idd = Integer.parseInt(id);
rs = stat.executeQuery("select * from d_users where id=" + idd);
if(rs.next()) {
String pass = rs.getString("password");
if(pass.equals(password)) {
}else {
resp.getWriter().write("<style type=\"text/css\">\r\n" +
"a{font-size=40px;margin-left: 49%;}" +
" </style>");
resp.getWriter().write("<h2 align=\'center\'>密码错误</h2>");
resp.getWriter().write("<a href=\'/dcan/homework1.html\' align=\'center\' font-size=30px>返回</a>");
}
}else {
resp.getWriter().write("<style type=\"text/css\">\r\n" +
"a{font-size=40px;margin-left: 49%;}" +
" </style>");
resp.getWriter().write("<h3 align=\'center\'>用户不存在</h3>");
resp.getWriter().write("<a href=\'/dcan/homework1.html\' align=\'center\' >返回</a>");
}
}else {
//注册页面
req.getRequestDispatcher("/zc.html").forward(req, resp);
}
} catch (Exception e) {
// TODO 自动生成的 catch 块
e.printStackTrace();
} finally {
try {
if(rs != null)
rs.close();
if(stat != null)
stat.close();
if(conn != null)
conn.close();
} catch (SQLException e) {
// TODO 自动生成的 catch 块
e.printStackTrace();
}
}
主界面：
暂时只写了一个模块，后面还会有其他的模块：
<body bgcolor="#F8F8F8">
<table align="center" width="100%">
<tr id="tr1">
<th colspan="2">
<img src="images/b1.jpg"/>
</th>
<th colspan="2">
<form action="">
<input type="text" id="n" name="n" value="">
<input type="submit" id="s" value="搜索店铺">
</form>
</th>
</tr>
</table>
<table align="center" width="70%" id="table2">
<tr id="tr2">
<td align="center"><a href="" id="a1" target="_self">首页</a></td>
<td align="center"><a href="" id="a1" target="_self">中式料理</a></td>
<td align="center"><a href="" id="a1" target="_self">异国美食</a></td>
<td align="center"><a href="" id="a1" target="_self">饮品甜点</a></td>
<td align="center"><a href="" id="a1" target="_self">小吃夜宵</a></td>
</tr>
</table>
<hr color="#FF6B37">
<table align="center" width="70%">
<tr>
<td width="22%" id="td1">
<table background="images/b2.jpg" id="table4">
<tr>
<th align="left">成都美食</th>
</tr>
<tr>
<td>
<fieldset >
<table>
<tr>
<th colspan="3" align="left"><span id="th1">商区</span></th>
<th><a href="" target="_self" id="aa">更多</a></th>
</tr>
<tr>
<td><a href="" target="" id="aa">春熙路</a></td>
<td><a href="" target="" id="aa">牛市口</a></td>
<td><a href="" target="" id="aa">火车站</a></td>
</tr>
<tr>
<td><a href="" target="" id="aa">茶店子</a></td>
<td><a href="" target="" id="aa">西南交大</a></td>
<td><a href="" target="" id="aa">天府广场</a></td>
</tr>
<tr>
<td><a href="" target="" id="aa">宽窄巷子</a></td>
<td><a href="" target="" id="aa">梁家巷</a></td>
<td><a href="" target="" id="aa">万年场</a></td>
</tr>
</table>
</fieldset>
</td>
</tr>
<tr id="tr0">
<td>
<fieldset >
<table>
<tr>
<th colspan="3" align="left"><span id="th1">菜系</span></th>
<th><a href="" target="_self" id="aa">更多</a></th>
</tr>
<tr>
<td><a href="" target="" id="aa">家常菜</a></td>
<td><a href="" target="" id="aa">日系料理</a></td>
<td><a href="" target="" id="aa">法式料理</a></td>
</tr>
<tr>
<td><a href="" target="" id="aa">农家菜</a></td>
<td><a href="" target="" id="aa">川菜</a></td>
<td><a href="" target="" id="aa">下午茶</a></td>
</tr>
<tr>
<td><a href="" target="" id="aa">人气餐厅</a></td>
<td><a href="" target="" id="aa">食品保健</a></td>
<td><a href="" target="" id="aa">饮品店</a></td>
</tr>
</table>
</fieldset>
</td>
</tr>
<tr id="tr0">
<td>
<fieldset >
<table>
<tr>
<th colspan="3" align="left"><span id="th1">氛围</span></th>
<th><a href="" target="_self" id="aa">更多</a></th>
</tr>
<tr>
<td><a href="" target="" id="aa">浪漫约会</a></td>
<td><a href="" target="" id="aa">朋友聚餐</a></td>
<td><a href="" target="" id="aa">家庭聚会</a></td>
</tr>
<tr>
<td><a href="" target="" id="aa">商务宴请</a></td>
<td><a href="" target="" id="aa">休闲小憩</a></td>
<td><a href="" target="" id="aa">随便吃吃</a></td>
</tr>
</table>
</fieldset>
</td>
</tr>
</table>
</td>
<td id="td1" width="100%">
<table id="table4">
<tr>
<td>
<table id="table3" bgcolor="white">
<tr>
<th colspan="2" align="left" >
<span>午餐优选</span>
</th>
</tr>
<tr>
<td>
<fieldset >
<table >
<tr>
<td rowspan="2"><img src="images/bb1.jpg"></td>
<td><span>良美基</span></td>
</tr>
<tr>
<td><span>人均20 </span><a href="/lmjservlet">去看看</a></td>
</tr>
</table>
</fieldset>
</td>
<td>
<fieldset >
<table >
<tr>
<td rowspan="2"><img src="images/bb1.jpg"></td>
<td><span>良美基</span></td>
</tr>
<tr>
<td><span>人均20 </span><a href="/lmjservlet">去看看</a></td>
</tr>
</table>
</fieldset>
</td>
</tr>
<tr>
<td>
<fieldset >
<table >
<tr>
<td rowspan="2"><img src="images/bb1.jpg"></td>
<td><span>良美基</span></td>
</tr>
<tr>
<td><span>人均20 </span><a href="/lmjservlet">去看看</a></td>
</tr>
</table>
</fieldset>
</td>
<td>
<fieldset >
<table >
<tr>
<td rowspan="2"><img src="images/bb1.jpg"></td>
<td><span>良美基</span></td>
</tr>
<tr>
<td><span>人均20 </span><a href="/lmjservlet">去看看</a></td>
</tr>
</table>
</fieldset>
</td>
</tr>
</table>
</td>
</tr>
</table>
</td>
</tr>
</table>
</body>