注册验证java代码[针对上篇文章]_安全相关

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注册验证代码[针对上篇文章] ,大家可以多参考我以前发布的文章。

https://www.jb51.net/article/19801.htm
复制代码代码如下:
<%@ page contentType=\”text/html; charset=gb2312\” language=\”java\”%>
<%@ page import=\”java.sql.*\”%>
<!DOCTYPE HTML PUBLIC \”-//W3C//DTD HTML 4.01 Transitional//EN\” \”http://www.w3.org/TR/html4/loose.dtd\”>
<html>
<head>
<meta http-equiv=\”Content-Type\” content=\”text/html; charset=gb2312\”>
<title>用户注册</title>
</head>
<body>
<%
String strSql=\”\”;
String database_username=\”root\”;
String database_password=\”\”;
String url=\”jdbc:mysql://localhost/ch3?useUnicode=true&characterEncoding=gb2312\”;
try
{
Class.forName(\”org.gjt.mm.mysql.Driver\”);
Connection dbConn= DriverManager.getConnection(url,database_username,database_password);
Statement stmt=dbConn.createStatement();
ResultSet rs=null;
String s_UserName = request.getParameter(\”UserName\”);
strSql = \”select * from users where UserName like \’\”+s_UserName+\”\’\”;
rs = stmt.executeQuery(strSql);
if(rs.next())
{
out.println(\”<h1 align=center>用户名<font color=red>\”+s_UserName+\”</font>已经存在！</h1>\”);
out.println(\”<div align=center><input type=button name=btn value=返回 onClick=\’window.history.go(-1)\’></div>\”);
}
else
{
String s_UserPassword = request.getParameter(\”UserPassword\”);
String s_NickName = request.getParameter(\”NickName\”);
String s_Sex = request.getParameter(\”Sex\”);
String s_Email = request.getParameter(\”Email\”);
strSql = \”insert into users (UserName,UserPassword,NickName,Sex,Email) values(\’\”+s_UserName+\”\’,\’\”+s_UserPassword+\”\’,\’\”+s_NickName+\”\’,\’\”+s_Sex+\”\’,\’\”+s_Email+\”\’)\”;
try
{
stmt.executeUpdate(strSql);
out.println(\”<h1 align=center>用户注册成功，您的注册信息如下</h1>\”);
out.println(\”<p align=center>用户名：<font color=blue>\”+s_UserName+\”</font></p>\”);
out.println(\”<p align=center>密码：<font color=blue>\”+s_UserPassword+\”</font></p>\”);
out.println(\”<p align=center>昵称：<font color=blue>\”+s_NickName+\”</font></p>\”);
if(s_Sex.equals(\”0\”))
{
out.println(\”<p align=center>性别：<font color=blue>男</font></p>\”);
}
else
{
out.println(\”<p align=center>性别：<font color=blue>女</font></p>\”);
}
out.println(\”<p align=center>Email：<font color=blue>\”+s_Email+\”</font></p>\”);
}
catch(Exception ex)
{
out.println(\”<h1 align=center>用户注册失败</h1>\”);
out.println(\”<div align=center><input type=button name=btn1 value=返回 onClick=\’window.history.go(-1)\’></div>\”);
}
}
rs.close();
stmt.close();
dbConn.close();
}
catch(Exception ex)
{
out.println(\”<h1 align=center>数据库连接错误</h1>\”);
out.println(\”<div align=center><input type=button name=btn2 value=返回 onClick=\’window.history.go(-1)\’></div>\”);
}
%>
</body>
</html>

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