Пример #1
1
 static void attributeMean() {
   try {
     Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
     con = DriverManager.getConnection("jdbc:odbc:jbdb", "system", "tiger");
     Statement meanQuery = con.createStatement();
     ResultSet mean = meanQuery.executeQuery("select AVG(sal) from employ where sal IS NOT NULL");
     if (mean.next()) {
       fill = con.createStatement();
       fill.executeUpdate("UPDATE employ set sal = COALESCE(sal," + mean.getInt(1) + ")");
     }
     /*fill = con.createStatement();
     fill.executeUpdate("UPDATE employ set sal = COALESCE(sal,AVG(sal))");*/
     st = con.createStatement();
     rs = st.executeQuery("select * from employ");
     System.out.println("Sno\tName\tSalary\tGPF\tGrade");
     while (rs.next()) {
       System.out.println(
           ">>"
               + rs.getString(1)
               + "\t"
               + rs.getString(2)
               + "\t"
               + rs.getString(3)
               + "\t"
               + rs.getString(4)
               + "\t"
               + rs.getString(5));
     }
   } catch (Exception e) {
     System.out.println("Error: " + e);
   }
 }
Пример #2
0
 static Connection connectToDb(String uname, String pword) throws SQLException {
   DriverManager.registerDriver(new oracle.jdbc.driver.OracleDriver());
   Connection con =
       DriverManager.getConnection(
           "jdbc:oracle:thin:hr/[email protected]:1521:orcl", uname.trim(), pword.trim());
   return con;
 }
Пример #3
0
 public static void connect() {
   try {
     DriverManager.registerDriver(new sun.jdbc.odbc.JdbcOdbcDriver());
     link = DriverManager.getConnection(myURL);
   } catch (SQLException e) {
     System.out.println("Echec de la connexion : " + e.getMessage());
   }
 }
Пример #4
0
  public static void recieveTrafficRates(String IP, float upload, float download) {
    System.out.println("Insertion of Data into Database!");
    Connection con = null;
    String url = "jdbc:mysql://localhost:3306/";
    String dbName = "traffic_report";
    String driverName = "com.mysql.jdbc.Driver";
    String userName = "******";
    String password = "******";
    String IP_address = IP;

    float up = upload, down = download;

    try {
      Class.forName(driverName).newInstance();
      con = DriverManager.getConnection(url + dbName, userName, password);
      try {
        Statement st = con.createStatement();

        int val =
            st.executeUpdate(
                "INSERT current_traffic VALUES('" + IP + "','" + up + "','" + down + "')");

        System.out.println("Data Entry process successfully!");
      } catch (SQLException s) {
        System.out.println("Table all ready exists!" + s);
      }
      con.close();
    } catch (Exception e) {
      e.printStackTrace();
    }
  }
Пример #5
0
  public void doSQL() throws Exception {
    Class.forName("org.sqlite.JDBC");
    Connection conn = DriverManager.getConnection("jdbc:sqlite:test.db");
    Statement stat = conn.createStatement();
    stat.executeUpdate("drop table if exists people;");
    stat.executeUpdate("create table people (name, occupation);");
    PreparedStatement prep = conn.prepareStatement("insert into people values (?, ?);");

    prep.setString(1, "Gandhi");
    prep.setString(2, "politics");
    prep.addBatch();
    prep.setString(1, "Turing");
    prep.setString(2, "computers");
    prep.addBatch();
    prep.setString(1, "Wittgenstein");
    prep.setString(2, "smartypants");
    prep.addBatch();

    conn.setAutoCommit(false);
    prep.executeBatch();
    conn.setAutoCommit(true);

    ResultSet rs = stat.executeQuery("select * from people;");
    while (rs.next()) {
      System.out.println("name = " + rs.getString("name"));
      System.out.println("job = " + rs.getString("occupation"));
    }
    rs.close();
    conn.close();
  }
Пример #6
0
 static void specificAttributeMean() {
   try {
     Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
     con = DriverManager.getConnection("jdbc:odbc:jbdb", "system", "tiger");
     fill = con.createStatement();
     fill.executeUpdate(
         "UPDATE employ a set sal = (select AVG(sal) from employ where sal IS NOT NULL and grade = (select grade from employ b where sal IS NULL and a.grade=b.grade and ROWNUM <= 1)) where sal IS NULL");
     st = con.createStatement();
     rs = st.executeQuery("select * from employ");
     System.out.println(">>Sno\tName\tSalary\tGPF\tGrade");
     while (rs.next()) {
       System.out.println(
           ">>"
               + rs.getString(1)
               + "\t"
               + rs.getString(2)
               + "\t"
               + rs.getString(3)
               + "\t"
               + rs.getString(4)
               + "\t"
               + rs.getString(5));
     }
   } catch (Exception e) {
     System.out.println("Error: " + e);
   }
 }
Пример #7
0
 static void globalConstant() {
   try {
     Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
     con = DriverManager.getConnection("jdbc:odbc:jbdb", "system", "tiger");
     fill = con.createStatement();
     fill.executeUpdate("UPDATE employ set sal = " + GlobalConstant + " where sal IS NULL");
     // fill.executeUpdate("UPDATE employ set sal = COALESCE(sal," + GlobalConstant + ")");
     // System.out.println("Entered..!");
     st = con.createStatement();
     rs = st.executeQuery("select * from employ");
     System.out.println("Sno\tName\tSalary\tGPF\tGrade");
     while (rs.next()) {
       System.out.println(
           ">>"
               + rs.getString(1)
               + "\t"
               + rs.getString(2)
               + "\t"
               + rs.getString(3)
               + "\t"
               + rs.getString(4)
               + "\t"
               + rs.getString(5));
     }
   } catch (Exception e) {
     System.out.println("Error: " + e);
   }
 }
Пример #8
0
 static void probableValue() {
   try {
     Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
     con = DriverManager.getConnection("jdbc:odbc:jbdb", "system", "tiger");
     Statement freqQuery = con.createStatement();
     ResultSet freq =
         freqQuery.executeQuery(
             "select sal,count(*) as total from employ group by sal order by total desc");
     if (freq.next()) {
       fill = con.createStatement();
       fill.executeUpdate("UPDATE employ set sal = COALESCE(sal," + freq.getInt(1) + ")");
     }
     st = con.createStatement();
     rs = st.executeQuery("select * from employ");
     System.out.println(">>Sno\tName\tSalary\tGPF\tGrade");
     while (rs.next()) {
       System.out.println(
           ">>"
               + rs.getString(1)
               + "\t"
               + rs.getString(2)
               + "\t"
               + rs.getString(3)
               + "\t"
               + rs.getString(4)
               + "\t"
               + rs.getString(5));
     }
   } catch (Exception e) {
     System.out.println("Error: " + e);
   }
 }
Пример #9
0
  public List<Cocinero> getAllCocinero() {
    List ll = new LinkedList();
    Statement st;
    ResultSet rs;
    String url = "jdbc:mysql://localhost:3306/food";
    String user = "******";
    String pass = "******";
    String driver = "com.mysql.jdbc.Driver";

    try (Connection connection = DriverManager.getConnection(url, user, pass)) {
      Class.forName(driver);
      st = connection.createStatement();
      String recordQuery = ("Select * from cocinero");
      rs = st.executeQuery(recordQuery);
      while (rs.next()) {
        Integer idcoc = rs.getInt("idCocinero");
        String years = rs.getString("AñosServicio");
        String idemp = rs.getString("Empleados_idEmpleados");
        Integer idepp = Integer.parseInt(idemp);
        ll.add(new Cocinero(idcoc, years, idepp));
      }

    } catch (ClassNotFoundException | SQLException ex) {
      Logger.getLogger(MenuEmpleados.class.getName()).log(Level.SEVERE, null, ex);
    }
    return ll;
  }
Пример #10
0
  protected void doGet(HttpServletRequest request, HttpServletResponse response)
      throws ServletException, IOException {

    PrintWriter writer = response.getWriter();
    String noteName = request.getParameter("noteName");
    String note = request.getParameter("note");

    try {
      Class.forName("com.mysql.jdbc.Driver");
      Connection con = DriverManager.getConnection("jdbc:mysql://localhost:3306/evernoteDB");

      Statement st = con.createStatement();

      st.executeUpdate(
          "INSERT INTO note (noteName, note) VALUES ('" + noteName + "','" + note + "')");

      response.sendRedirect("/userNotes.jsp");
    } catch (ClassNotFoundException e) {
      writer.println("Couldn't load database driver: " + e.getMessage());
    } catch (SQLException e) {
      writer.println("SQLException caught: " + e.getMessage());
    } catch (Exception e) {
      writer.println(e);
    }
  }
Пример #11
0
  public void carga_default() {

    Connection con = null;
    Statement st = null;
    try {
      Class.forName("com.mysql.jdbc.Driver").newInstance();
      con = DriverManager.getConnection("jdbc:mysql://localhost/rsu_inventario", "root", pass);
      try {
        st = con.createStatement();
        st.executeUpdate(
            "INSERT INTO ADMIN VALUES ('174183767','msX','msx','estudiante','santiago',"
                + "'2130','3030303','30303030','los valdios 3030','*****@*****.**',12345);");

      } catch (SQLException s) {

        SQL_FORM error = new SQL_FORM();
        JOptionPane.showMessageDialog(error, "error al ingresar datos");

        // SQL_FORM error = new SQL_FORM();
        JOptionPane.showMessageDialog(error, s, "alert", JOptionPane.ERROR_MESSAGE);

      } finally {
        con.close();
        st.close();
      }
    } catch (Exception e) {
      e.printStackTrace();
    }
  }
Пример #12
0
  /**
   * Check the user's name and password and verify that the user is an instructor. Throws
   * InvalidDBRequestException if user is not an instructor, wrong password, or if any error occured
   * to the database connection.
   *
   * @param name user's user name
   * @param pass user's password
   * @throws InvalidDBRequestException
   */
  public void instructorLogin(String name, String pass) throws InvalidDBRequestException {
    try {
      Connection db;

      Class.forName(GaigsServer.DBDRIVER);
      db =
          DriverManager.getConnection(GaigsServer.DBURL, GaigsServer.DBLOGIN, GaigsServer.DBPASSWD);

      Statement stmt = db.createStatement();
      ResultSet rs;

      // check if instructor
      rs = stmt.executeQuery("select password from instructor where login = '******'");
      if (!rs.next()) {
        if (debug) System.out.println("User not found in the instructor table");
        throw new InvalidDBRequestException("Instructor not registered");
      }

      // check password
      if (!rs.getString(1).equals(pass)) {
        if (debug) System.out.println("Invalid password for user: "******"Invalid password for user: "******"Invalid SQL in instructor login: "******"???");
    } catch (ClassNotFoundException e) {
      System.err.println("Driver Not Loaded");
      throw new InvalidDBRequestException("Server Error");
    }
  }
Пример #13
0
  public static void main(String args[]) {
    int myport = 9090;
    Socket s;
    ServerSocket ss;
    BufferedReader fromSoc, fromKbd;
    PrintStream toSoc;
    String line, msg;
    try {
      s = new Socket("169.254.63.10", 6016);
      System.out.println("enter line");
      System.out.println("connected");
      toSoc = new PrintStream(s.getOutputStream());

      toSoc.println(myport);
      String url =
          "jdbc:odbc:Driver={Microsoft Access Driver (*.mdb)}; DBQ=D://db.mdb; DriverID=22;READONLY=true;";

      Connection con = DriverManager.getConnection(url, "", "");
      Statement st = con.createStatement();
      String ip = "169.254.63.10";
      int port = 6016;
      String video = "rooney";

      st.executeUpdate(
          " insert into p3 values('" + ip + "' , '" + port + "' , '" + video + "' );  ");

      fun();

    } catch (Exception e) {

      System.out.println("exception" + e);
    }
  }
Пример #14
0
  private static boolean connectToDatabase() {
    String databaseConnectionInfo =
        "jdbc:mysql://localhost/authorities?user=authorities&password=authorities&useUnicode=yes&characterEncoding=UTF-8";
    if (authoritiesConn == null) {
      try {
        authoritiesConn = DriverManager.getConnection(databaseConnectionInfo);
        getPreferredAuthorByOriginalNameStmt =
            authoritiesConn.prepareStatement(
                "SELECT viafId, normalizedName from preferred_authors where originalName = ?",
                ResultSet.TYPE_FORWARD_ONLY,
                ResultSet.CONCUR_READ_ONLY);
        getPreferredAuthorByNormalizedNameStmt =
            authoritiesConn.prepareStatement(
                "SELECT viafId, normalizedName from preferred_authors where originalName = ?",
                ResultSet.TYPE_FORWARD_ONLY,
                ResultSet.CONCUR_READ_ONLY);
        getPreferredAuthorByAlternateNameStmt =
            authoritiesConn.prepareStatement(
                "SELECT preferred_authors.viafId, normalizedName FROM `preferred_authors` inner join alternate_authors on preferred_authors.viafId = alternate_authors.viafId where alternateName = ?",
                ResultSet.TYPE_FORWARD_ONLY,
                ResultSet.CONCUR_READ_ONLY);

        return true;
      } catch (Exception e) {
        logger.error("Error connecting to authorities database");
        return false;
      }
    }
    return true;
  }
Пример #15
0
  public void conectarBDdinamic(String ip) {

    if (ip == null) {
      ip = "192.168.8.231";
    }
    url = "jdbc:postgresql://" + ip + "/ventasalm";
    // javax.swing.JOptionPane.showMessageDialog(null, url);
    String estado;
    try {

      final String CONTROLADOR = "com.microsoft.sqlserver.jdbc.SQLServerDriver";
      Class.forName(CONTROLADOR);
      // System.getProperty( "user.dir" )+"/CarpetaBD/NombredelaBasedeDatos.mdb";
      conexion = DriverManager.getConnection(url, user, pass);
      sentencia = conexion.createStatement();
      // estado="Conectado Correctamente";
    } catch (ClassNotFoundException ex1) {
      ex1.printStackTrace();
      javax.swing.JOptionPane.showMessageDialog(null, "Error Carga Driver");
      estado = "Servidor no esta disponible";
      // System.exit(1);
    } catch (SQLException ex) {
      ex.printStackTrace();
      javax.swing.JOptionPane.showMessageDialog(null, "Error Creacion Statement");
      estado = "Servidor no esta disponible";
      // System.exit(1);
    }
    // return estado;
  }
Пример #16
0
  public void conectarBaseDeDatos() {
    try {
      final String CONTROLADOR = "org.postgresql.Driver";
      Class.forName(CONTROLADOR);
      // System.getProperty( "user.dir" )+"/CarpetaBD/NombredelaBasedeDatos.mdb";
      conexion =
          DriverManager.getConnection(
              "jdbc:postgresql://" + main.ipSeleccionada + "/" + objUtils.nameBD, user, pass);
      // conexion = DriverManager.getConnection("jdbc:postgresql://127.0.0.1/goliak_jg", "postgres",
      // "majcp071102kaiser");

      sentencia = conexion.createStatement();
      /*JOptionPane.showMessageDialog(null, "si conecta");*/
    } catch (ClassNotFoundException ex1) {
      // ex1.printStackTrace();
      javax.swing.JOptionPane.showMessageDialog(null, "Error Carga Driver." + ex1.getMessage());
      System.exit(1);
    } catch (SQLException ex) {
      // ex.printStackTrace();
      javax.swing.JOptionPane.showMessageDialog(
          null,
          "Error Creacion Statement."
              + ex.getMessage()
              + " / "
              + url
              + " / "
              + user
              + " / "
              + pass);
      System.exit(1);
    }
  }
Пример #17
0
  public String checkValidLogin(String myUserName, String myPW) {

    try {
      Class.forName(javaSQLDriverPath);
      Connection conn =
          (Connection) DriverManager.getConnection(ConnectionPath, ConnectionUser, ConnectionPW);
      Statement st = conn.createStatement();
      String query = "Select * from User";

      ResultSet rs = st.executeQuery(query);
      while (rs.next()) {
        // return rs.getString("Username");
        if (myUserName.equals(rs.getString("Username"))) {
          if (myPW.equals(rs.getString("Password"))) {
            setUserVariables(myUserName);
            return "success";
          } else {
            return "wrongPassword";
          }
        }
      }

      rs.close();
      st.close();
      conn.close();

      return "userNotFound";
    } catch (Exception e) {

      return e.getMessage();
    }
  }
Пример #18
0
 // AQUI VOYA  OBTENER EL SERVDUIOR QUEMADO EN UN ARCHIVO DE TEXTO
 public void conectarBaseDeDatos2() {
   try {
     final String CONTROLADOR = "org.postgresql.Driver";
     Class.forName(CONTROLADOR);
     // System.getProperty( "user.dir" )+"/CarpetaBD/NombredelaBasedeDatos.mdb";
     conexion = DriverManager.getConnection(url2, user, pass);
     sentencia = conexion.createStatement();
     /*JOptionPane.showMessageDialog(null, "si conecta");*/
   } catch (ClassNotFoundException ex1) {
     // ex1.printStackTrace();
     javax.swing.JOptionPane.showMessageDialog(null, "Error Carga Driver." + ex1.getMessage());
     System.exit(1);
   } catch (SQLException ex) {
     // ex.printStackTrace();
     javax.swing.JOptionPane.showMessageDialog(
         null,
         "Error Creacion Statement."
             + ex.getMessage()
             + " / "
             + url2
             + " / "
             + user
             + " / "
             + pass);
     System.exit(1);
   }
 }
Пример #19
0
  /**
   * Gets a list of courses that belongs to an instructor. Throws InvalidDBRequestException if any
   * error occured to the database connection.
   *
   * @param name the instructor's user name
   * @return a vector containing the list of courses
   * @throws InvalidDBRequestException
   */
  public Vector getCourseList(String name) throws InvalidDBRequestException {
    Vector courseList = new Vector();

    try {
      Connection db;

      Class.forName(GaigsServer.DBDRIVER);
      db =
          DriverManager.getConnection(GaigsServer.DBURL, GaigsServer.DBLOGIN, GaigsServer.DBPASSWD);

      Statement stmt = db.createStatement();
      ResultSet rs;

      // get the course list
      rs =
          stmt.executeQuery(
              "select course_num, course_name from course where instructor = '"
                  + name
                  + "' order by course_num");
      while (rs.next()) courseList.add(rs.getString(1) + " - " + rs.getString(2));

      rs.close();
      stmt.close();
      db.close();
    } catch (SQLException e) {
      System.err.println("Invalid SQL in getCourseList: " + e.getMessage());
      throw new InvalidDBRequestException("???");
    } catch (ClassNotFoundException e) {
      System.err.println("Driver Not Loaded");
      throw new InvalidDBRequestException("Server Error");
    }

    return courseList;
  }
Пример #20
0
  /**
   * Delete a student from the database. Also deletes the student's folders. Throws
   * InvalidDBRequestException if any error in database connection.
   *
   * @param username student's user name
   * @throws InvalidDBRequestException
   */
  private void purgeStudent(String username) throws InvalidDBRequestException {
    try {
      Class.forName(GaigsServer.DBDRIVER);
      db =
          DriverManager.getConnection(GaigsServer.DBURL, GaigsServer.DBLOGIN, GaigsServer.DBPASSWD);

      Statement stmt = db.createStatement();
      int count;

      // delete from scores
      count = stmt.executeUpdate("delete from scores where user_login = '******'");

      // delete from student
      count = stmt.executeUpdate("delete from student where login = '******'");

      // delete student's folder
      File studentDir = new File("./StudentQuizzes/" + username);
      if (!(studentDir.delete())) {
        System.err.println("Error in deleting folder for student: " + username);
      }

      stmt.close();
      db.close();
    } catch (SQLException e) {
      System.err.println("Invalid SQL in addCourse: " + e.getMessage());
      throw new InvalidDBRequestException("??? ");
    } catch (ClassNotFoundException e) {
      System.err.println("Driver Not Loaded");
      throw new InvalidDBRequestException("Internal Server Error");
    }
  }
Пример #21
0
  /**
   * Deletes an instructor from the database. Deletes the instructor's courses by invoking the
   * deleteCourse method. Throws InvalidDBRequestException if instructor not in the database or
   * other database connection problems.
   *
   * @see deleteCourse
   * @param instructor instructor's user name
   * @throws InvalidDBRequestException
   */
  public void deleteInstructor(String instructor) throws InvalidDBRequestException {
    try {
      Class.forName(GaigsServer.DBDRIVER);
      db =
          DriverManager.getConnection(GaigsServer.DBURL, GaigsServer.DBLOGIN, GaigsServer.DBPASSWD);

      Statement stmt = db.createStatement();
      int count;

      // delete the instructor's courses
      ResultSet rs =
          stmt.executeQuery(
              "select course_num from course where instructor = '" + instructor + "'");
      while (rs.next()) deleteCourse(rs.getString(1).trim(), instructor);

      // delete the instructor's record
      count = stmt.executeUpdate("delete from instructor where login ='******'");

      rs.close();
      stmt.close();
      db.close();
    } catch (SQLException e) {
      System.err.println("Invalid SQL in addCourse: " + e.getMessage());
      throw new InvalidDBRequestException("??? ");
    } catch (ClassNotFoundException e) {
      System.err.println("Driver Not Loaded");
      throw new InvalidDBRequestException("Internal Server Error");
    }
  }
Пример #22
0
  /**
   * Deletes students who are older than a certain number of years and not registered to any course.
   *
   * @param year students older than year are candidates to be deleted
   * @throws InvalidDBRequestException
   */
  public void deleteOldStudent(int year) throws InvalidDBRequestException {
    try {
      Class.forName(GaigsServer.DBDRIVER);
      db =
          DriverManager.getConnection(GaigsServer.DBURL, GaigsServer.DBLOGIN, GaigsServer.DBPASSWD);

      Statement stmt = db.createStatement();

      // query all student who have been in the database longer than a number of years and not
      // registered to any course
      ResultSet rs =
          stmt.executeQuery(
              "select login, count(course_id) "
                  + "from student s left join courseRoster r on login = user_login "
                  + "where date_entered < SUBDATE(now(), INTERVAL "
                  + new String().valueOf(year).trim()
                  + " YEAR) "
                  + "group by login, date_entered");
      // delete them
      while (rs.next()) if (rs.getInt(2) == 0) purgeStudent(rs.getString(1).trim());

      rs.close();
      stmt.close();
      db.close();
    } catch (SQLException e) {
      System.err.println("Invalid SQL in addCourse: " + e.getMessage());
      throw new InvalidDBRequestException("??? ");
    } catch (ClassNotFoundException e) {
      System.err.println("Driver Not Loaded");
      throw new InvalidDBRequestException("Internal Server Error");
    }
  }
Пример #23
0
  /**
   * Remove a student from a particular course. Also Deletes all the quiz vizualisation files in the
   * student's directory which relates to the course. Caution: vizualisation file will be deleted
   * eventhough it also relates to another course if the student is also registered to that course.
   * (FIX ME!) Throws InvalidDBRequestException if the student is not registered in the course,
   * error occured during deletion, or other exception occured.
   *
   * @param username student's user name
   * @param courseID course id (course number + instructor name)
   * @throws InvalidDBRequestException
   */
  public void deleteStudent(String username, String courseID) throws InvalidDBRequestException {
    try {
      Class.forName(GaigsServer.DBDRIVER);
      db =
          DriverManager.getConnection(GaigsServer.DBURL, GaigsServer.DBLOGIN, GaigsServer.DBPASSWD);

      Statement stmt = db.createStatement();
      ResultSet rs;

      int count = 0;

      // check if student registered to the course
      rs =
          stmt.executeQuery(
              "select * from courseRoster where course_id = '"
                  + courseID
                  + "' and user_login = '******'");
      if (!rs.next())
        throw new InvalidDBRequestException("Student is not registered to the course");

      // remove student from the course
      count =
          stmt.executeUpdate(
              "delete from courseRoster where course_id = '"
                  + courseID
                  + "' and user_login = '******'");
      if (count != 1) throw new InvalidDBRequestException("Error occured during deletion!");

      // delete the quiz visualization files
      rs =
          stmt.executeQuery(
              "select distinct unique_id, s.test_name from scores s, courseTest t "
                  + "where s.test_name = t.test_name "
                  + "and course_id = '"
                  + courseID
                  + "' "
                  + "and user_login = '******'");
      while (rs.next()) {
        deleteVisualization(rs.getString(1), username, rs.getString(2));
        count =
            stmt.executeUpdate("delete from scores where unique_id = " + rs.getString(1).trim());
      }

      rs.close();
      stmt.close();
      db.close();
    } catch (SQLException e) {
      System.err.println("Invalid SQL in addstudent: " + e.getMessage());
      throw new InvalidDBRequestException("???");
    } catch (ClassNotFoundException e) {
      System.err.println("Driver Not Loaded");
      throw new InvalidDBRequestException("Internal Server Error");
    }
  }
Пример #24
0
  /* to search the DB table for req. video*/
  boolean search(String file) {

    boolean found = false;

    Connection con = null;
    String url =
        "jdbc:odbc:Driver={Microsoft Access Driver (*.mdb)};  DBQ=D://db.mdb; DriverID=22;READONLY=true;";

    try {
      con = DriverManager.getConnection(url, "", "");
      try {
        Statement st = con.createStatement();
        ResultSet rs = st.executeQuery("SELECT video FROM p3");
        while (rs.next()) {
          String colvalue = rs.getString("video");
          if (colvalue.equalsIgnoreCase(file)) found = true;
        }

      } catch (SQLException s) {
        System.out.println("SQL statement is not executed!");
      }
    } catch (Exception e) {
      System.out.println(e);
    }
    return found;
  }
Пример #25
0
 public static void installDriver(Driver driver) {
   try {
     DriverManager.registerDriver(driver);
   } catch (Exception e) {
     e.printStackTrace();
   }
 }
Пример #26
0
  /**
   * Obtains information on a quiz that a student has taken, which includes the student's answer to
   * the quiz, a unique id of the instance, number of questions in the quiz, number of questions
   * answered correctly, and vizualisation type of the quiz. Throws InvalidDBRequestException if
   * cannot find the record of the stuent taking the quiz, quiz is not registered in the database,
   * or if any error occured to the database connection.
   *
   * @param student student's user name
   * @param quiz quiz name
   * @param startTime the time the student started the quiz
   * @return a string tokenizer containing: answer,uniqueID, numQuestions, numCorrect, and
   *     visualType. It uses "@" as the delimiter.
   * @throws InvalidDBRequestException
   */
  public StringTokenizer getAnswerAndVisualType(String student, String quiz, String startTime)
      throws InvalidDBRequestException {
    String answer;
    String uniqueID;
    String numQuestions;
    String numCorrect;
    String visualType;
    try {
      Connection db;

      Class.forName(GaigsServer.DBDRIVER);
      db =
          DriverManager.getConnection(GaigsServer.DBURL, GaigsServer.DBLOGIN, GaigsServer.DBPASSWD);

      Statement stmt = db.createStatement();
      ResultSet rs;

      // get student's answer, unique id, number of questions, and number of questions answered
      // correctly
      rs =
          stmt.executeQuery(
              "select transcript, unique_id, num_questions, num_correct from scores "
                  + "where test_name = '"
                  + quiz
                  + "' and user_login = '******' and start_time = '"
                  + startTime
                  + "'");
      if (!rs.next()) throw new InvalidDBRequestException("Student has not taken the quiz");
      else {
        answer = rs.getString(1).trim();
        uniqueID = rs.getString(2).trim();
        numQuestions = rs.getString(3).trim();
        numCorrect = rs.getString(4).trim();
      }

      // get quiz vizualisation type
      rs = stmt.executeQuery("select visual_type from test where name = '" + quiz + "' ");
      if (!rs.next())
        throw new InvalidDBRequestException(
            "Quiz was not found! Can't retrieve visualization type.");
      else {
        visualType = rs.getString(1);
      }

      rs.close();
      stmt.close();
      db.close();
    } catch (SQLException e) {
      System.err.println("Invalid SQL in getAnswerAndVisualType: " + e.getMessage());
      throw new InvalidDBRequestException("???");
    } catch (ClassNotFoundException e) {
      System.err.println("Driver Not Loaded");
      throw new InvalidDBRequestException("Internal Server Error");
    }
    return new StringTokenizer(
        answer + "@" + uniqueID + "@" + numQuestions + "@" + numCorrect + "@" + visualType, "@");
  }
Пример #27
0
  /**
   * Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
   *
   * @param request servlet request
   * @param response servlet response
   * @throws ServletException if a servlet-specific error occurs
   * @throws IOException if an I/O error occurs
   */
  protected void processRequest(HttpServletRequest request, HttpServletResponse response)
      throws ServletException, IOException {
    response.setContentType("text/html;charset=UTF-8");
    PrintWriter out = response.getWriter();
    String username = request.getParameter("username");
    String password = request.getParameter("password");
    Statement stmt;
    ResultSet rs;
    Connection con = null;

    try {
      Class.forName("com.mysql.jdbc.Driver");
      String connectionUrl = "jdbc:mysql://localhost/myflickr?" + "user=root&password=123456";
      con = DriverManager.getConnection(connectionUrl);

      if (con != null) {
        System.out.println("connected to mysql");
      }
    } catch (SQLException e) {
      System.out.println("SQL Exception: " + e.toString());
    } catch (ClassNotFoundException cE) {
      System.out.println("Class Not Found Exception: " + cE.toString());
    }

    try {
      stmt = con.createStatement();

      System.out.println("SELECT * FROM flickrusers WHERE name='" + username + "'");
      rs = stmt.executeQuery("SELECT * FROM flickrusers WHERE name='" + username + "'");

      while (rs.next()) {

        if (rs.getObject(1).toString().equals(username)) {

          out.println("<h1>To username pou epileksate uparxei hdh</h1>");
          out.println("<a href=\"project3.html\">parakalw dokimaste kapoio allo.</a>");

          stmt.close();
          rs.close();
          return;
        }
      }
      stmt.close();
      rs.close();

      stmt = con.createStatement();

      if (!stmt.execute("INSERT INTO flickrusers VALUES('" + username + "', '" + password + "')")) {
        out.println("<h1>Your registration is completed  " + username + "</h1>");
        out.println("<a href=\"index.jsp\">go to the login menu</a>");
        registerListener.Register(username);
      } else {
        out.println("<h1>To username pou epileksate uparxei hdh</h1>");
        out.println("<a href=\"project3.html\">Register</a>");
      }
    } catch (SQLException e) {
      throw new ServletException("Servlet Could not display records.", e);
    }
  }
Пример #28
0
  /**
   * Query a quiz list from the database. If there is no student user name specified, the list will
   * contain all quizzes that are used in the instructor's courses. Otherwise, the list will contain
   * all quizzes that the student has taken and from the instructor's courses which the student is
   * registered. Throws InvalidDBRequestException if any error occured to the database connection.
   *
   * @param instructor instructor's user name
   * @param student student's user name. Can be empty to get a list of all quizzes in the
   *     instructor's courses.
   * @return a vector containing the list of quizzes
   * @throws InvalidDBRequestException
   */
  public Vector getQuizList(String instructor, String student) throws InvalidDBRequestException {
    Vector list = new Vector();

    try {
      Connection db;

      Class.forName(GaigsServer.DBDRIVER);
      db =
          DriverManager.getConnection(GaigsServer.DBURL, GaigsServer.DBLOGIN, GaigsServer.DBPASSWD);

      Statement stmt = db.createStatement();
      ResultSet rs;

      if (!student.equals("")) {
        // get the list that contains all quizzes that the student has taken and from the
        // instructor's courses which the student is registered
        rs =
            stmt.executeQuery(
                "select courseTest.test_name, scores.start_time from scores, courseTest, course "
                    + "where courseTest.test_name = scores.test_name "
                    + "and courseTest.course_id = course.course_id "
                    + "and instructor = '"
                    + instructor
                    + "' and user_login = '******' "
                    + "order by scores.start_time");

        while (rs.next()) {
          list.add(rs.getString(1) + " <" + rs.getString(2) + ">");
        }
      } else {
        // get the list that contains all quizzes that are used in the instructor's courses
        rs =
            stmt.executeQuery(
                "select test_name from courseTest, course "
                    + "where courseTest.course_id = course.course_id "
                    + "and instructor = '"
                    + instructor
                    + "' ");

        while (rs.next()) {
          list.add(rs.getString(1));
        }
      }

      rs.close();
      stmt.close();
      db.close();
    } catch (SQLException e) {
      System.err.println("Invalid SQL in getQuizList: " + e.getMessage());
      throw new InvalidDBRequestException("???");
    } catch (ClassNotFoundException e) {
      System.err.println("Driver Not Loaded");
      throw new InvalidDBRequestException("Internal Server Error");
    }

    return list;
  }
Пример #29
0
  public void connectItems(String query)
        // PRE:  query must be initialized
        // POST: Updates the list of Items based on the query.
      {
    String driver = "org.apache.derby.jdbc.ClientDriver"; // Driver for DB
    String url = "jdbc:derby://localhost:1527/ShopDataBase"; // Url for DB
    String user = "******"; // Username for db
    String pass = "******"; // Password for db
    Connection myConnection; // Connection obj to db
    Statement stmt; // Statement to execute a result appon
    ResultSet results; // A set containing the returned results
    int rowcount; // Num objects in the resultSet
    int i; // Index for the array

    try { // Try connection to db

      Class.forName(driver).newInstance(); // Create our db driver

      myConnection = DriverManager.getConnection(url, user, pass); // Initalize our connection

      stmt =
          myConnection.createStatement(
              ResultSet.TYPE_SCROLL_INSENSITIVE,
              ResultSet.CONCUR_UPDATABLE); // Create a new statement
      results = stmt.executeQuery(query); // Store the results of our query

      rowcount = 0;
      if (results.last()) // Go to the last result
      {
        rowcount = results.getRow();
        results.beforeFirst();
      }
      itemsArray = new Item[rowcount];

      i = 0;
      while (results.next()) // Itterate through the results set
      {
        itemsArray[i] =
            new Item(
                results.getInt("item_id"),
                results.getString("item_name"),
                results.getString("item_type"),
                results.getInt("price"),
                results.getInt("owner_id"),
                results.getString("item_path")); // Creat new Item
        i++;
      }

      results.close(); // Close the ResultSet
      stmt.close(); // Close the statement
      myConnection.close(); // Close the connection to db

    } catch (Exception e) // Cannot connect to db
    {
      System.err.println(e.toString());
      System.err.println("Error, something went horribly wrong in connectItems!");
    }
  }
Пример #30
-1
  public List<Empleado> getAllEmpleados() {
    List ll = new LinkedList();
    Statement st;
    ResultSet rs;
    String url = "jdbc:mysql://localhost:3306/food";
    String user = "******";
    String pass = "******";
    String driver = "com.mysql.jdbc.Driver";

    try (Connection connection = DriverManager.getConnection(url, user, pass)) {
      Class.forName(driver);
      st = connection.createStatement();
      String recordQuery = ("Select * from empleados");
      rs = st.executeQuery(recordQuery);
      while (rs.next()) {
        Integer id = rs.getInt("idEmpleados");
        String name = rs.getString("Nombre");
        String telf = rs.getString("Telefono");
        ll.add(new Empleado(id, name, telf));
        /// System.out.println(id +","+ name +","+ apellido +","+ cedula +","+ telf +"
        // "+direccion+"");
      }

    } catch (ClassNotFoundException | SQLException ex) {
      Logger.getLogger(MenuEmpleados.class.getName()).log(Level.SEVERE, null, ex);
    }
    return ll;
  }