用户登录 增删改查
main.html
<frameset rows="20%,*">
<frame src="top.html" name="top"></frame>
<frameset cols="20%,*">
<frame src="left.html" name="left"/>
<frame src="right.html" name="right"/>
</frameset>
</frameset>
top.html
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <title>top.html</title> <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> <meta http-equiv="description" content="this is my page"> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <!--<link rel="stylesheet" type="text/css" href="./styles.css">-->
</head> <body> This is top page. <br> </body> </html>
left.html
<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=gb2312"> <link href="css/amcss.css" rel="stylesheet" type="text/css"> <script language="JavaScript"> function show(i){ if (i.style.display == "none") { i.style.display = ""; }else{ i.style.display = "none"; } } </script>
</head>
<body > <table width="162" border="0" cellpadding="0" cellspacing="1"> <tr> <td valign=tip> <!--=============--> <table width="100%" border="0" align=center cellpadding="0" cellspacing="1"> <tr> <td height=27 background="images/title.gif" style="cursor:hand" onClick="show(a1)"> <div align="center"><strong>用户管理</strong> </div> </td> </tr> <tr> <td> <DIV id=a1 style="DISPLAY: none"> <div align="left"> <table width="156" border="0" cellspacing="1" cellpadding="1" align="center"> <tr><td height=23 class="amrow"><a href=add-users.html target="right">添加用户</a></td></tr> <tr><td height=23 class="amrow"><a href=list-users.html target="right">查询用户</a></td></tr> <tr><td height=23 class="amrow"><a href=modify-users.html target="right">修改用户</a></td></tr> <tr><td height=23 class="amrow"><a href=delete-users.jsp target="right">删除用户</a></td></tr> </table> </div> </Div> </td> </tr>
<tr> <td height=27 background="images/title.gif" style="cursor:hand" onClick="show(a2)"> <div align="center"><strong>新闻管理</strong> </div> </td> </tr> <tr> <td> <DIV id=a2 style="DISPLAY: none"> <div align="left"> <table width="156" border="0" cellspacing="1" cellpadding="1" align="center"> <tr><td height=23 class="amrow"><a href=add-news.html target="right">添加新闻</a></td></tr> <tr><td height=23 class="amrow"><a href=list-news.jsp target="right">查询新闻</a></td></tr> <tr><td height=23 class="amrow"><a href=modify-news.jsp target="right">修改新闻</a></td></tr> <tr><td height=23 class="amrow"><a href=delete-news.jsp target="right">删除新闻</a></td></tr> </table> </div> </Div> </td> </tr> </table>
right.html
This is right!
add-users.html
<h1>添加用户信息</h1>
<form action="add-users.jsp" method="get"> 用户名:<input type="text" name="uname"><br> 密码：<input type="password" name="upass"><br> 邮箱：<input type="text" name="email"><br> <input type="submit" value="添加">
</form>
add-users.jsp
<%@page pageEncoding="gb2312" import="java.sql.*"%>
<%
//提取
String u=request.getParameter("uname");
String p=request.getParameter("upass");
String e=request.getParameter("email");
//添加到db/user表中
//注：1、。jar包放到web-inf/lib文件夹中; 2、导入java.sql.*包
try{
Class.forName("org.gjt.mm.mysql.Driver");
String url="jdbc:mysql://localhost:3306/db";//db数据库名
Connection con=DriverManager.getConnection(url,"root","123456");
String sql="insert into user1 values(?,?,?)";
PreparedStatement pstm=con.prepareStatement(sql);
pstm.setString(1,u);//设置参数
pstm.setString(2,p);
pstm.setString(3,e);
pstm.executeUpdate();//执行语句
pstm.close();//关闭语句
}catch(Exception ex)
{
}
%>
delete-users-do.jsp
<%@page import="java.sql.*"%>
<%
String u=request.getParameter("uname");
try{
Class.forName("org.gjt.mm.mysql.Driver");
String url="jdbc:mysql://localhost:3306/db";
Connection con=DriverManager.getConnection(url,"root","123456");
String sql="delete from user1 where uname=?";
PreparedStatement pstm=con.prepareStatement(sql);
pstm.setString(1,u);
pstm.executeUpdate();
pstm.close();
con.close();
}catch(Exception e)
{
e.printStackTrace();
}
%>
delete-users.jsp
<%@page pageEncoding="gb2312" import="java.sql.*"%>
<form action="delete-users-do.jsp" method="get">
请输入要删除的用户名：<input type="text" name="uname">
<input type="submit" value="删除">
</form>
查询：
list-users.html
<form action="list-users.jsp" method="get"> 请输入用户名：<input type="text" name="uname"> <input type="submit" value="查询"> </form>
list.users.jsp
<%@page pageEncoding="gb2312" import="java.sql.*"%>
<% String u=request.getParameter("uname"); try{ Class.forName("org.gjt.mm.mysql.Driver"); String url="jdbc:mysql://localhost:3306/db"; Connection con=DriverManager.getConnection(url,"root","123456"); String sql="select uname,upass,email from user1 where uname like '%"+u+"%'"; PreparedStatement pstm=con.prepareStatement(sql); //pstm.setString(1,u); ResultSet rs=pstm.executeQuery();//查询结果集 //out.println("用户名 "+"密码 "+"Email "+"<br>"); %> <table border=1> <tr> <th>用户名</th> <th>密码</th> <th>Email</th> </tr> <% while(rs.next()) { %> <tr> <td><%=rs.getString(1)%></td> <td><%=rs.getString(2)%></td> <td><%=rs.getString(3)%></td> </tr> <%
//out.println(rs.getString(1)+" "+rs.getString(2)+" "+rs.getString(3)+"<br>"); } }catch(Exception e) { e.printStackTrace(); } %>
modify-users.html
<form action="modify-users.jsp" method="get">
请输入用户名：<input type="text" name="uname">
<input type="submit" value="查询">
</form>
modify-users.jsp
<%@page pageEncoding="gb2312" import="java.sql.*"%>
<% String u=request.getParameter("uname"); try{ Class.forName("org.gjt.mm.mysql.Driver"); String url="jdbc:mysql://localhost:3306/db"; Connection con=DriverManager.getConnection(url,"root","123456"); String sql="select uname,upass,email from user1 where uname=?"; PreparedStatement pstm=con.prepareStatement(sql); pstm.setString(1,u); ResultSet rs=pstm.executeQuery(); if(rs.next()) { %> <form action="modify-users-do.jsp" method="get"> 用户名：<input type="text" name="uname" value=<%=rs.getString(1)%>><br> 密码：<input type="text" name="upass" value=<%=rs.getString(2)%>><br> Email:<input type="text" name="upass" value=<%=rs.getString(2)%>><br> <input type="submit" value="保存"> </form> <% } }catch(Exception e) { e.printStackTrace(); } %>