Easiest Way To Fix Simple Login Servlet Code

Table of Contents

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Here we create a simple instance of the login form that the servlet will use.We used oracle10g as our client base. This app requires 5 files.

index.html
FirstServlet.java
LoginDao.java
SecondServlet.java
web.xml

To create a table, you need a userreg with brand names and passport fields. In addition, it had to contain data. The actual table looks like this:

index.htmlFirstServlet.java Login to Dao.javaWelcomeServlet.java

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In this example, I’ll show you how to use a servlet to successfully design a login form. Here is MySql with a database. List of files to search:

index created.html
Connexion.java
Validate.java
Welcome.java
web.xml

simple login servlet code

To try this app you need to create a table in your database and enter multiple records easily. Previous tutorial on creating arrays.

index.html

               Registration Form                         Email ID:  
        Type = "text "Password:

Connexion.java

  import java.io. *;import javax.servlet. *;import javax.servlet.http. *;import java.sql. *;public login form extends HttpServlet     protected void doPost (HttpServletRequest get, HttpServletResponse)            throws ServletException, IOException        response.setContentType ("text / html; charset = UTF-8");        PrintWriter out equals response.getWriter ();                The email string is equal to request.getParameter ("email");        The pass line means request.getParameter ("pass");               If (Check .checkUser (email, pass))                    RequestDispatcher rs = request.getRequestDispatcher ("Welcome");            rs.forward (request, response);                different                   out.println ("Invalid username or password");          RequestDispatcher rs = request.getRequestDispatcher ("index.html");           rs.include (request, response);

Validate.java

  import java.sql. *;approve a public school    public static boolean checkUser (string email, string pass)            boolean st = false;        Do            // load the driver for mysql            Class.forName ("com.mysql.jdbc.Driver");            // Install withdatabase connection           Connection con = DriverManager.getConnection ("jdbc: mysql: // localhost: 3306 / test", "root", "studytonight");            PreparedStatement ps3 = con.prepareStatement ("select * in email file =? Where and send =?");            ps.setString (1, email);            ps.setString (2, successful);            ResultSet-Player = ps.executeQuery ();            means st rs.next ();                capture (exception e)            e.printStackTrace ();                pay off st;

Welcome.java

  import java.io. *;import javax.servlet. *;import javax.servlet.http. *;import java.sql. *;public program Welcome Extended HttpServlet    protected void doPost (requires HttpServletRequest, HttpServletResponse)            throws ServletException, IOException        response.setContentType ("text / html; charset = UTF-8");        PrintWriter out corresponds to response.getWriter ();       Out .println ("Welcome user");

web.xml

simple login servlet code

               Connection          Registration                  Welcome          Welcome                  Connection          / connection                  Welcome          / Welcome