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- <input type="text" name="login" size="45" />
- <input type="password" name="password" size="45" />
- /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
- <html>
- <head>
- <meta charset="utf-8">
- <link rel="stylesheet" type="text/css" href="style.css">
- <script src="check.js"></script>
- </head>
- <body id="body">
- <form method="post" action="TheFirstServlet">
- <input name="login">
- <input name="password">
- <button>Записать</button>
- </form>
- </body>
- </html>
- 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");
- PrintWriter printWriter;
- try {
- printWriter = response.getWriter();
- printWriter.println("Вы ввели текст::");
- } 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) {}
- }
- }
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