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Over the past few days, some users have told us that they have come across an example of connecting to a hashmap servlet.

 

 

At this level, we will show you how to displayServlet login form. Today we are using the MySql database. Make a list of initiates:

• index.html
• Connexion.java
• Validate.java
• Welcome.java

Test

• web.xml

For this query, you need to create a family tree in your database and fill in the historical data. Refer to the previous tutorial when you create an array.

index.html

                              
       Email ID:  
        Password:  
                      

Connexion.java

  import java.io. *;import javax.servlet. *;import javax.servlet.http. *;import java.sql. *;Public plan connection extends HttpServlet     secure cancellation request, doPost (HttpServletRequest HttpServletResponse response)            throws ServletException, IOException        response.setContentType ("text / html; character set = UTF-8");        PrintWriter out = response.getWriter ();                String email = request.getParameter ("email");        The pass string is equal to request.getParameter ("pass");                if (Validate.checkUser (email, pass))RequestDispatcher rs = request.getRequestDispatcher ("Welcome");            rs.forward (request, response);                another                   out.println ("Invalid username or password");           RequestDispatcher rs Request = .getRequestDispatcher ("index.html");           rs.include (request, response);               

Validate.java

  import java.sql.Class *;public inspection    populace static boolean checkUser (string email address, string pass)            boolean st = false;        have            // load statements for mysql            Class.forName ("com.mysql.jdbc.Driver");           // Establish a connection based on the database            Connection con = DriverManager.getConnection ("jdbc: mysql: // localhost: 3306 / test", "root", "studytonight");           PreparedStatement ps = con.prepareStatement ("select * generated by case where email =? And pass =?");            ps.setString (1, email);           ps.setString (2, successful);            Result Set Rs = ps.executeQuery ();            Saint = rs.next ();                capture (exception e)            e.printStackTrace ();                Return st.        

Welcome.java

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

web.xml

               Registration          Registration                  Welcome          Welcome                  Registration          / connection                  Welcome          / Welcome          

 

 

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Conseils Pour Résoudre L’exemple De Connexion Au Servlet Hashmap
Советы по решению примера подключения сервлета Hashmap
해시맵 서블릿 연결 예제 해결을 위한 팁
Consejos Para Resolver El Ejemplo De Conexión De Servlet De Hashmap
Suggerimenti Per La Risoluzione Dell’esempio Di Connessione Servlet Hashmap
Wskazówki Dotyczące Rozwiązywania Przykładowego Połączenia Z Serwletem Hashmap
Tipps Zum Lösen Von Hashmap-Servlet-Verbindungsbeispiel
Dicas Para Resolver O Exemplo De Conexão De Servlet Hashmap
Tips Voor Het Oplossen Van Hashmap Servlet-verbindingsvoorbeeld
Tips För Att Lösa Hashmap Servlet Connection Exempel