Jdbc bean errorpage - select - update

Question

i got a problem getting the errorhandling from a bean- i would like to open an errorpage from the bean when the executeupdate function fails - maybe due to an allready existing value
if i move thedb access into a normal jsp i can declare a
<%@page errorPage="errorpage.jsp" %>
but how can i manage that within the bean ? - or should i put all the code into a jsp without trying to fit into the mvc modell ?
import java.sql.* ;
public class DbBean {
   private Connection con;
   private Statement st;
   private ResultSet rs;
   private Statement statement;
   public DbBean() {
     try {
       Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
       con = DriverManager.getConnection("jdbc:odbc:konten");
     catch (Exception e) {
       System.out.println("Fehler bei Verbindung zur Datenbank");
   public ResultSet get(String query) {
     try {
       st = con.createStatement();
       rs = st.executeQuery(query);
     catch (Exception e) {
       System.out.println("Fehler bei Datenbankabfrage" + e.getMessage());
     return rs;
   public void insertData(String query) {
     try {
       st = con.createStatement();
       st.executeUpdate(query);
     catch (SQLException sqle) {
       System.err.println(sqle.getMessage() + " !! Fehler beim InsertVersuch !!");
     catch (Exception e) {
       System.out.println("Fehler bei Datenbankupdateversuch" + e.getMessage());

Answer 1

Well in order for the error page to come up, you have to give the jsp page an exception.
Right now you are just catching the exception, printing a message, and continuing as normal.
You will probably want to rethrow the exception so that it trickles down to the jsp where it can explode into a glorious error page.
Cheers,
evnafets