本帖最后由 金_鑫 于 2012-7-30 15:42 编辑
以下是登陆界面源码
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%@ page import="java.sql.*"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>登陆页面</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
</head>
<body>
<%
String userid = new String(request.getParameter("username").getBytes("ISO-8859-1"),"GBK");
String password = new String(request.getParameter("password").getBytes("ISO-8859-1"),"GBK");
if ( userid == "" || userid == null || userid.length()>20 || password == "" || password == null || password.length()>20 )
{
try
{
response.sendRedirect ( "wrong.jsp?wrongid=1" );
} catch ( Exception e )
{
}
}
else{
Connection conn = null;
Statement stmt = null;
ResultSet rs = null;
try {
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver").newInstance();
conn =DriverManager.getConnection("jdbc:odbc:student");
stmt = conn.createStatement();
String sql="SELECT * FROM denglu where id="+userid+" and pw="+password;
if (stmt.execute(sql)) {
rs = stmt.getResultSet();
while(rs.next()){
out.println("登陆成功!<br />");
out.println("欢迎您:"+rs.getString("name"));
}
}
conn.close();
}
catch (SQLException ex){
response.sendRedirect ( "wrong.jsp?wrongid=2" );
} catch (InstantiationException e) {
response.sendRedirect ( "wrong.jsp?wrongid=2" );
} catch (IllegalAccessException e) {
response.sendRedirect ( "wrong.jsp?wrongid=2" );
} catch (ClassNotFoundException e) {
response.sendRedirect ( "wrong.jsp?wrongid=2" );
}
finally {
if (rs != null) {
try {
rs.close();
} catch (SQLException sqlEx) { } // ignore
rs = null;
}
if (stmt != null) {
try {
stmt.close();
} catch (SQLException sqlEx) { } // ignore
stmt = null;
}
}
}
%>
</body>
</html>
Access数据库
编号 id pw
1 admin 11
2 11 11
但输入账号admin 密码11 却进不去,为什么,求教。
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