this is one of my jsp files
i use it to check the form which contains
users' login or registering information.
i use parameter type in http-head to identify the
different kind of information.
thank you for your help.
//confirm.jsp
<%@ page contentType="text/html; charset=GBK" %>
<html>
<head>
<title>welcom!</title>
<%@ page language="java"%>
<%@ page import="java.sql.*"%>
<%@ page import="java.lang.*"%>
<%@ page import="beans.SqlCon.*"%>
<%@ page session="true"%>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
</head>
<body bgcolor="#FFFFFF" text="#000000">
<jsp:useBean id="dbconnect" scope="page" class="beans.SqlCon"/>
<%
try{
dbconnect.dbConn();
}
catch(SQLException e){
out.println("数据库不能正确打开,请再试一次.");
}
%>
<%
private Boolean isDigit(Char cCheck){
if(('0'<=cCheck)&&(cCheck<='9'))
return true;
else
return false;
}
%>
<%
public boolean IsAlpha(Char cCheck)
{
if ((('a'<=cCheck) && (cCheck<='z')) || (('A'<=cCheck) && (cCheck<='Z')))
return true;
else
return false;
} %>
<%
private boolean isValid(
String info){
for (nIndex=0; nIndex<info.length(); nIndex++)
{
Char cCheck = info.charAt(nIndex);
if ( nIndex==0 && ( cCheck.equals('-') || cCheck.equals('_')) )
return false;
if (!IsDigit(cCheck) && !IsAlpha(cCheck) && !(cCheck.equals('_' )))
return false;
else
return true;
}
}
%>
<%
private boolean checkMail(String mail){
if(mali.indexOf("@")!=-1&&mail.indexOf(".")!=-1){
if ( nIndex==0 && ( cCheck.equals('-') || cCheck.equals('_')) )
return false;
else{
if (IsDigit(cCheck)||IsAlpha(cCheck)&& !(cCheck.equals('_' )))
return true;
else
return false;
}
}
} %>
<%
type=request.getParameter("ty");
if(type.equals("new")){
Strinng id,pwd,gender,mail;
id=request.getParameter("user_id").trim();
pwd=request.getParameter("user_pwd").trim();
rpwd=request.getParameter("user_rpwd").trim();
gender=request.getparameter("radiobutton");
boolean isCorrect=false;
boolean isFilled=false;
if(id!=null&&pwd!=null&&rpwd!=null)
isFilled=ture;
else{ %>
<h2><font color="red">必填字段不能为空</font></h2>");
<jsp:forward page="register.html"/>
<% if(ifFilled)
isFilled=false;
}
if(isFilled){
if(id.length()<=12){
if(isValid(id))
isCorrect=ture;
else {
%>
<p align="center"><font color="red">请勿输入特殊字符</font></p>");
<jsp:forward page="register.html"/>
<%
if(isCorrect)
isCorrect=false;
}
}
else{ %>
<h2 align="center"><font color="#FF0000">用户名的长度须小于12!</font></h2>
<jsp:forward page="register.html"/>
<%
}
}
else{ %>
<h2 align="center"><font color="#FF0000">用户名不能为空!</font></h2>
<jsp:forward page="register.html"/>
<%
if(isCorrect)
iscorrect=false;
}
if(pwd.length()<=8){
if(!pwd.isValid()){
if(isCorrect)
isCorrect=false; %>
<h2 align="center"><font color="#FF0000">密码输入不规范!</font></h2>
<jsp:forward page="register.html"/>
<%
}
}
else{ %>
<h2 align="center"><font color="#FF0000">密码长度须小于等于8位</font></h2>
<jsp:forward page="register.html"/>
<%
}
if(rpwd.length()<=8){
if(!rpwd.isValid()){
if(isCorrect)
isCorrect=false; %>
<h2 align="center"><font color="#FF0000">确认密码输入不规范!</font></h2>
<jsp:forward page="register.html"/>
<%
}
}
else{
if(!(pwd.equals("rpwd"))){
if(isCorrect())
isCorrect=false; %>
<h2 align="center"><font color="#FF0000">两次密码不一样!</font></h2>
<jsp:forward page="register.html"/>
<%
}
}
if(mail!=null){
if(!check_mail()){
if(isCorrect())
isCorrect=false;
%>
<h2 align="center"><font color="#FF0000">邮箱地址格式不正确!</font></h2
><jsp:forward page="register.html"/>
<%
}
}
if(isFilled&&isCorrect){
try{
ResultSet res=dbconnect.query("select *"+"from user_info" + "where user_id=id");
}
catch(Exception e){
out.println("对不起,数据库读取有误,请再试一次.");
}
}
if(res.next()){
res.close(); %>
<p align="center"><font color="red">对不起,这个名字已经存在,请重新注册!</font></p>
<jsp:forward page="register.html"/>
<%
}
else{
try{
int suc=dbconnect.update("insert into user_info(user_id,user_pwd,user_gender)"+"values(id,pwd,gender)" );
}
catch(Excption e){
system.out.println(" 对不起,数据插入有误,请再试一次.");
}
if(suc!=0)
system.out.println("对不起,数据插入有误,请再试一次.");
else{
if(request.getParameter("user_mail")!=null){
mail=request.getParameter("user_mail");
try{
dbconnect.update("insert into user_info(user_mail)"+"values(mail)");
}
catch(Exception e){
system.out.println("对不起,数据插入有误,请再试一次.");
}
}
}
session.setAttribute("userName",id); %>
<%
if(type.equals("old")||type.equals("login")){
String id,password;
id=reguest.getParameter("u_id").trim();
password=request.getParameter("u_pwd").trim();
boolean isFilled=false;
boolean isCorrect=true;
if(id!=null&&password!=null)
isFilled=ture;
else{
if(isFilled())
isFilled=false;%>
<h2 align="center"><font color="#FF0000">必填项不能为空!</font></h2>
<jsp:forward page="register.html"/>
<%}
if(isFilled){
if(id.length()>12||isValid(id)){
if(isCorrect())
isCorrect=false;
%>
<h2 align="center"><font color="#FF0000">用户名输入不正确!</font></h2>
<jsp:forward page="register.html"/>
<%}
if(pwd.length()>8||pwd.isValid("pwd")){
if(isCorrect())
isCorrect=false; %>
<h2 align="center"><font color="#FF0000">密码输入不正确!</font></h2>
<jsp:forward page="register.html"/>
<%
}
if(isFilled&&isCorrect){
try{
ResultSet res=dbconnect.query("select *"+"from user_info"+"where user_id=id");
}
catch(Exception e){
system.out.println("对不起,数据库读取有误,请再试一次.");
}
if(res.next()){
if(password.trim()==res.getString(2)){
session.setAtrribute("userName",id);%>
<jsp:forward page="topic.jsp"/>
<%
}
else{%>
<h1 align="center"><font size="5" color="#FF0000"><b>密码错误,请再来一次</b>!</font></h1>
<jsp:forward page="register.html"/>
<%
}
}
else{ %>
<p align="center"><font size="5" color="#FF0000"><b>这个注册号不存在!</b></font><br>
<jsp:forward page="register.html"/>
<%
}
}
try{
if(res!=null)
res.close();
}
finally{
dbconnect.close();
}
%>
</body>
</html>
happyprince1206@yahoo.com
