Saving data in database using textbox and save button

Question

Hello. I just want a help about my code because when i close the application the data that i add is not been saved.
Here is my code of save:
function saveData(event:MouseEvent):void
  status.text = "Saving data";
  insertStmt = new SQLStatement();
  insertStmt.sqlConnection = conn;
  var sql:String = "INSERT INTO employees (firstName, lastName, salary) VALUES (:param, :param1, :param2)";
  insertStmt.text = sql;
  insertStmt.parameters[":param"] = firstName.text;
  insertStmt.parameters[":param1"] = lastName.text;
  insertStmt.parameters[":param2"] = salary.text;
  insertStmt.addEventListener(SQLEvent.RESULT, insertResult);
  insertStmt.addEventListener(SQLErrorEvent.ERROR, insertError);
  insertStmt.execute();
Here is the full code:
import fl.data.DataProvider;
import flash.data.SQLResult;
import flash.data.SQLConnection;
import flash.filesystem.File;
import flash.data.SQLStatement;
import flash.data.SQLConnection;
var conn:SQLConnection;
var createStmt:SQLStatement;
var insertStmt:SQLStatement;
var insertStmt2:SQLStatement;
var insertStmt3:SQLStatement;
var selectStmt:SQLStatement;
var insert1Complete:Boolean = false;
var insert2Complete:Boolean = false;
saveBtn.addEventListener(MouseEvent.CLICK, saveData);
loadBtn.addEventListener(MouseEvent.CLICK, getData);
init();
function init():void
  conn = new SQLConnection();
  conn.addEventListener(SQLEvent.OPEN, openSuccess);
  conn.addEventListener(SQLErrorEvent.ERROR, openFailure);
  status.text = "Creating and opening database";
  // Use these two lines for an on-disk database
  // but be aware that the second time you run the app you'll get errors from
  // creating duplicate records.
// var dbFile:File = File.applicationStorageDirectory.resolvePath("DBSample.db");
// conn.openAsync(dbFile);
  // Use this line for an in-memory database
  conn.openAsync(null);
function openSuccess(event:SQLEvent):void
  conn.removeEventListener(SQLEvent.OPEN, openSuccess);
  conn.removeEventListener(SQLErrorEvent.ERROR, openFailure);
  createTable();
function openFailure(event:SQLErrorEvent):void
  conn.removeEventListener(SQLEvent.OPEN, openSuccess);
  conn.removeEventListener(SQLErrorEvent.ERROR, openFailure);
  status.text = "Error opening database";
  trace("event.error.message:", event.error.message);
  trace("event.error.details:", event.error.details);
function createTable():void
  status.text = "Creating table";
  createStmt = new SQLStatement();
  createStmt.sqlConnection = conn;
  var sql:String = "";
  sql += "CREATE TABLE IF NOT EXISTS employees (";
  sql += " empId INTEGER PRIMARY KEY AUTOINCREMENT,";
  sql += " firstName TEXT,";
  sql += " lastName TEXT,";
  sql += " salary NUMERIC CHECK (salary >= 0) DEFAULT 0";
  sql += ")";
  createStmt.text = sql;
  createStmt.addEventListener(SQLEvent.RESULT, createResult);
  createStmt.addEventListener(SQLErrorEvent.ERROR, createError);
  createStmt.execute();
function createResult(event:SQLEvent):void
  createStmt.removeEventListener(SQLEvent.RESULT, createResult);
  createStmt.removeEventListener(SQLErrorEvent.ERROR, createError);
  addData();
function createError(event:SQLErrorEvent):void
  status.text = "Error creating table";
  createStmt.removeEventListener(SQLEvent.RESULT, createResult);
  createStmt.removeEventListener(SQLErrorEvent.ERROR, createError);
  trace("CREATE TABLE error:", event.error);
  trace("event.error.message:", event.error.message);
  trace("event.error.details:", event.error.details);
function addData():void
  status.text = "Adding data to table";
  insertStmt = new SQLStatement();
  insertStmt.sqlConnection = conn;
  var sql:String = "";
  sql += "INSERT INTO employees (firstName, lastName, salary) ";
  sql += "VALUES ('Bob', 'Smith', 8000)";
  insertStmt.text = sql;
  insertStmt.addEventListener(SQLEvent.RESULT, insertResult);
  insertStmt.addEventListener(SQLErrorEvent.ERROR, insertError);
  insertStmt.execute();
  insertStmt2 = new SQLStatement();
  insertStmt2.sqlConnection = conn;
  var sql2:String = "";
  sql2 += "INSERT INTO employees (firstName, lastName, salary) ";
  sql2 += "VALUES ('John', 'Jones', 8200)";
  insertStmt2.text = sql2;
  insertStmt2.addEventListener(SQLEvent.RESULT, insertResult);
  insertStmt2.addEventListener(SQLErrorEvent.ERROR, insertError);
  insertStmt2.execute();
function insertResult(event:SQLEvent):void
  var stmt:SQLStatement = event.target as SQLStatement;
  stmt.removeEventListener(SQLEvent.RESULT, insertResult);
  stmt.removeEventListener(SQLErrorEvent.ERROR, insertError);
  if (stmt == insertStmt)
  insert1Complete = true;
  else
  insert2Complete = true;
  if (insert1Complete && insert2Complete)
  status.text = "Ready to load data";
function insertError(event:SQLErrorEvent):void
  status.text = "Error inserting data";
  insertStmt.removeEventListener(SQLEvent.RESULT, insertResult);
  insertStmt.removeEventListener(SQLErrorEvent.ERROR, insertError);
  trace("INSERT error:", event.error);
  trace("event.error.message:", event.error.message);
  trace("event.error.details:", event.error.details);
function getData(event:MouseEvent):void
  status.text = "Loading data";
  selectStmt = new SQLStatement();
  selectStmt.sqlConnection = conn;
  var sql:String = "SELECT empId, firstName, lastName, salary FROM employees";
  selectStmt.text = sql;
  selectStmt.addEventListener(SQLEvent.RESULT, selectResult);
  selectStmt.addEventListener(SQLErrorEvent.ERROR, selectError);
  selectStmt.execute();
function saveData(event:MouseEvent):void
  status.text = "Saving data";
  insertStmt = new SQLStatement();
  insertStmt.sqlConnection = conn;
  var sql:String = "INSERT INTO employees (firstName, lastName, salary) VALUES (:param, :param1, :param2)";
  insertStmt.text = sql;
  insertStmt.parameters[":param"] = firstName.text;
  insertStmt.parameters[":param1"] = lastName.text;
  insertStmt.parameters[":param2"] = salary.text;
  insertStmt.addEventListener(SQLEvent.RESULT, insertResult);
  insertStmt.addEventListener(SQLErrorEvent.ERROR, insertError);
  insertStmt.execute();
function selectResult(event:SQLEvent):void
  status.text = "Data loaded";
  selectStmt.removeEventListener(SQLEvent.RESULT, selectResult);
  selectStmt.removeEventListener(SQLErrorEvent.ERROR, selectError);
  var result:SQLResult = selectStmt.getResult();
  resultsGrid.dataProvider = new DataProvider(result.data);
// var numRows:int = result.data.length;
// for (var i:int = 0; i < numRows; i++)
// var output:String = "";
// for (var prop:String in result.data[i])
// output += prop + ": " + result.data[i][prop] + "; ";
// trace("row[" + i.toString() + "]\t", output);
function selectError(event:SQLErrorEvent):void
  status.text = "Error loading data";
  selectStmt.removeEventListener(SQLEvent.RESULT, selectResult);
  selectStmt.removeEventListener(SQLErrorEvent.ERROR, selectError);
  trace("SELECT error:", event.error);
  trace("event.error.message:", event.error.message);
  trace("event.error.details:", event.error.details);

Answer 1

Your database system may well have a setting for character encoding when creating new databases. If you set that to unicode JDBC should store and retrieve UNICODE strings automatically.
As to the HTML side, you should generally use UTF-8 encoding. You need an editor which understands UTF-8. JSPs and servlets have ways of specifying the encoding which goes into the http headers. For static HTML pages you may have to add a header like:
<META http-equiv="Content-type" value="text/HTML; charset=UTF-8">
When receiving form data you need to do
request.setCharacterEncoding("UTF-8");