JDBC and Servlets

Question

I am writing a servlet which retrieves data from a database into a result set. I want to compare a username (taken into the servlet via a form for example) with a username from the result set.
Can anyone tell me how this might be coded? Thanx.

Answer 1

get the userid and password from the html form:
String userid = req.getParameter("userid").trim();
String password = req.getParameter("password").trim();
find userid and password from database:
String sql="SELECT PASSWORD FROM USER WHERE USERID =?";
try{
Class.forName(".............");
con = DriverManager.getConnection(url,user,password);
pstmt = con.prepareStatement(sql);
pstmt.setString(1,userid);
ResultSet result = pstmt.executeQuery();
if(result != null){
result.next();
String pwd_DB = result.getString(1);
Compare password:
if (pwd_DB.equals(password)
Hope it will give you some help.
Yen