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());
}
}
@Override
public void doPost(HttpServletRequest req, HttpServletResponse resp) throws IOException {
System.out.println("Clearing changes");
Connection c = null;
try {
DriverManager.registerDriver(new AppEngineDriver());
c = DriverManager.getConnection("jdbc:google:rdbms://trmrphdn:veebirakendused/andmebaas");
String statement = "delete from kandidaat where nimi = 'Tandi Kaat'";
PreparedStatement stmt = c.prepareStatement(statement);
stmt.executeUpdate();
} catch (SQLException e) {
e.printStackTrace();
}
}
public void service(HttpServletRequest request, HttpServletResponse response)
throws IOException, ServletException {
try {
Driver driver = new com.mysql.jdbc.Driver();
DriverManager.registerDriver(driver);
Connection connection =
DriverManager.getConnection("jdbc:mysql://127.0.0.1/school", "root", "password");
PreparedStatement preparedStatement =
connection.prepareStatement("update student set name=?, per=? where roll=?");
preparedStatement.setString(1, request.getParameter("name"));
preparedStatement.setFloat(2, Float.parseFloat(request.getParameter("per")));
preparedStatement.setInt(3, Integer.parseInt(request.getParameter("roll")));
preparedStatement.execute();
preparedStatement.close();
connection.close();
} catch (SQLException e) {
e.printStackTrace();
}
RequestDispatcher requestDispatcher = request.getRequestDispatcher("/Display");
requestDispatcher.forward(request, response);
}
public void doGet(HttpServletRequest req, HttpServletResponse resp) throws IOException {
String fName = req.getParameter("fName");
String lName = req.getParameter("lName");
String party = req.getParameter("party");
String area = req.getParameter("area");
Connection c = null;
try {
DriverManager.registerDriver(new AppEngineDriver());
c =
DriverManager.getConnection(
"jdbc:google:rdbms://netivalimised2013:netivalimised/evalimised");
String statement;
if ((fName.equals("") || fName == null)
&& (lName.equals("") || lName == null)
&& (party.equals("") || party == null)
&& (area.equals("") || area == null)) {
System.out.println("Getting all candidates");
statement =
"SELECT Person.FirstName, Person.LastName, Party.PartyName, Area.AreaName "
+ "FROM Person JOIN Party ON Person.PartyID = Party.Party_Id JOIN Area ON Person.AreaID = Area.Area_Id";
} else statement = createQuery(fName, lName, party, area);
PreparedStatement stmt = c.prepareStatement(statement);
ResultSet rs = stmt.executeQuery();
String jsonData = createJSON(rs, party, area);
resp.setContentType("application/json");
resp.setCharacterEncoding("UTF-8");
resp.getWriter().write(jsonData);
} catch (SQLException e) {
e.printStackTrace();
} finally {
if (c != null) {
try {
c.close();
} catch (SQLException ignore) {
}
}
}
// resp.setHeader("Refresh","3; url=/evalimised.jsp");
}
// To connect to the specified database.
private static Connection getConnected(
String drivername, String dbstring, String username, String password) throws Exception {
Class drvClass = Class.forName(drivername);
DriverManager.registerDriver((Driver) drvClass.newInstance());
return (DriverManager.getConnection(dbstring, username, password));
}
