JSP Learning Notes (iii)-----using JSP to process user registration and Login

js| Notes | User Registration

1. This is a JSP instance, consists of four JSP pages, processing user registration and login Information 2. The first is login.jsp, the code is as follows:＜html＞
＜center＞
＜form method=get action="http://127.0.0.1:8000/jsp/test.jsp"＞
username＜input type=text name=username＞
＜br＞＜br＞
password＜input type=password name=pass＞
＜br＞＜br＞
＜input type=submit value="注册"＞
＜/form＞
＜form method=get action="http://127.0.0.1:8000/jsp/test3.jsp"＞
username＜input type=text name=username＞
＜br＞＜br＞
password＜input type=password name=pass＞
＜br＞＜br＞
＜input type=submit value="登陆"＞
＜/form＞
＜br＞
＜/center＞
＜/html＞
3. test.jsp code is as follows: (Main processing user registration, insert registration information into the database)
＜html＞
＜%@ page language="java" import="java.sql.*"%＞
your username is:＜%=request.getParameter("username")%＞
＜br＞＜br＞
your password is:＜%=request.getParameter("pass")%＞
＜br＞＜br＞
＜%
String name=request.getParameter("username");
String pass=request.getParameter("pass");
try
{
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
Connection dbcon=DriverManager.getConnection("jdbc:odbc:test","sa","");
PreparedStatement stat=dbcon.prepareStatement(
"insert login values(?,?)");
stat.setString(1,name);
stat.setString(2,pass);
stat.executeUpdate();
out.println("＜br＞＜br＞＜B＞insert successful＜/B＞");
}
catch(Exception e)
{
out.println(e);
}
%＞
＜b＞Click here to view all people＜/b＞
＜form method=get action="http://127.0.0.1:8000/jsp/test2.jsp"＞
＜input type=submit value="---＞"＞
＜/form＞
＜/html＞
4. test2.jsp, the code is as follows: (processing when the user registration is successful, you can view all registered users list)

＜html＞
＜%@ page language="java" import="java.sql.*"%＞
＜% try
{
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
Connection dbcon=DriverManager.getConnection("jdbc:odbc:test","sa","");
PreparedStatement stat=dbcon.prepareStatement(
"select * from login");
ResultSet result=stat.executeQuery();
%＞
＜table border=2＞
＜%
while(result.next())
{
%＞
＜tr＞＜td＞＜%=result.getString(1)%＞＜td＞＜/tr＞
＜%
}
%＞
＜/table＞
＜%
}
catch(Exception e)
{
out.println(e);
}
%＞
＜/html＞
5. The test3.jsp code is as follows: (processing user login information)
＜html＞
your username is:＜%=request.getParameter("username")%＞
＜br＞＜br＞
your password is:＜%=request.getParameter("pass")%＞
＜br＞＜br＞
＜%@ page language="java" import="java.sql.*"%＞
＜%
String name=request.getParameter("username");
String pass=request.getParameter("pass");
try
{
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
Connection dbcon=DriverManager.getConnection("jdbc:odbc:test","sa","");
PreparedStatement stat=dbcon.prepareStatement(
"select * from login where username=? and password=?");
stat.setString(1,name);
stat.setString(2,pass);
ResultSet result=stat.executeQuery();
if(result.next())
{
out.println("Login Successful");
}
else
{
out.println("Login Error");
}
}
catch(Exception e)
{
out.println(e);
}
%＞
6. In addition, you need a database called login, which requires only two columns Username,password.

Register first, username 33, password 33

Registration successful

Viewing registered Users

Landing success