Как занести данные из HTML-формы в MySQL при помощи JDBC?

#html #mysql #jdbc

Имеются 2 HTML-формы 

 


и 




База данных на MySQL Server, где присутствуют аналогичные поля login varchar (45)
NOT NULL и password varchar (45) NOT NULL. 

Подскажите, как при помощи JDBC записать данные HTML-формы в БД MySQL. PHP не предлагать,
можно другие Java-технологии.
    

Ответы

Ответ 1

Быстрая реализация с использование сервлета:

html


    
        
        
    
     
        
    
            
            
            
        
    



TheFirstServlet

public class FirstServlet extends HttpServlet {

protected void processRequest(HttpServletRequest request, HttpServletResponse response)
        throws ServletException, IOException {

    }

@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response)
        throws ServletException, IOException {
    processRequest(request, response);
}

@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response)
        throws ServletException, IOException {
    response.setContentType("text/html;charset=UTF-8");
    request.setCharacterEncoding("UTF-8");  
    String login = request.getParameter("login");
    String password = request.getParameter("password");  
    insert(login, password);
    PrintWriter printWriter;
    try {
        printWriter = response.getWriter(); 
        printWriter.println("Ну, попытались");
    } catch(IOException exc) {}
}

public void insert(String login, String password) {
    Connection conn = null;
    Statement stmt = null;
    try {
    Class.forName("com.mysql.jdbc.Driver");
    conn = DriverManager.getConnection("jdbc.url", "jdbc.login", "jdbc.password");
    stmt = conn.createStatement();
    String sql = "INSERT INTO NAME_TABLE (`login`,`password`)" +
            "VALUES ('" + login + "','" + password + "')";
    stmt.executeUpdate(sql);
    } catch (SQLException | ClassNotFoundException exc) {
        exc.printStackTrace();
        System.out.println("Не записал");
    }
    finally {
        try {
            if(conn!=null) conn.close();
            if(stmt!=null) stmt.close();
        } catch (SQLException exc) {}
    }
  }


Ну, как-то так по-простому.


Ответ 2

Вот первый попавшийся пример который подходит под вашу задачу:

/STEP 1. Import required packages
import java.sql.*;

public class JDBCExample {
   // JDBC driver name and database URL
   static final String JDBC_DRIVER = "com.mysql.jdbc.Driver";  
   static final String DB_URL = "jdbc:mysql://localhost/STUDENTS";

   //  Database credentials
   static final String USER = "username";
   static final String PASS = "password";

   public static void main(String[] args) {
   Connection conn = null;
   Statement stmt = null;
   try{
      //STEP 2: Register JDBC driver
      Class.forName("com.mysql.jdbc.Driver");

      //STEP 3: Open a connection
      System.out.println("Connecting to a selected database...");
      conn = DriverManager.getConnection(DB_URL, USER, PASS);
      System.out.println("Connected database successfully...");

      //STEP 4: Execute a query
      System.out.println("Inserting records into the table...");
      stmt = conn.createStatement();

      String sql = "INSERT INTO Registration " +
                   "VALUES (100, 'Zara', 'Ali', 18)";
      stmt.executeUpdate(sql);
      sql = "INSERT INTO Registration " +
                   "VALUES (101, 'Mahnaz', 'Fatma', 25)";
      stmt.executeUpdate(sql);
      sql = "INSERT INTO Registration " +
                   "VALUES (102, 'Zaid', 'Khan', 30)";
      stmt.executeUpdate(sql);
      sql = "INSERT INTO Registration " +
                   "VALUES(103, 'Sumit', 'Mittal', 28)";
      stmt.executeUpdate(sql);
      System.out.println("Inserted records into the table...");

   }catch(SQLException se){
      //Handle errors for JDBC
      se.printStackTrace();
   }catch(Exception e){
      //Handle errors for Class.forName
      e.printStackTrace();
   }finally{
      //finally block used to close resources
      try{
         if(stmt!=null)
            conn.close();
      }catch(SQLException se){
      }// do nothing
      try{
         if(conn!=null)
            conn.close();
      }catch(SQLException se){
         se.printStackTrace();
      }//end finally try
   }//end try
   System.out.println("Goodbye!");
}//end main
}//end JDBCExample