Servlet and Database access

Question

This is my first database program using servlet. Also I use ECS to create the HTML document.
I accept data from a HTML page and display on the screen as well as writing to a TABLE (in instantDB)
Do I have to have the database connection in INIT() method ?
-------------Here's the code ---------------------------------------------------
public class work2_db extends HttpServlet {
public void doPost(HttpServletRequest request,
          HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html");
PrintWriter out = response.getWriter();
String dbName = "db";
     String tableName = "survey";
     Connection conn = null;
     Statement stmt = null;
     System.out.print("\nLoading JDBC driver...\n\n");
     try {
     // InstantDB JDBC driver
     Class.forName("com.lutris.instantdb.jdbc.idbDriver");
     // MS Access, use default JDBC-ODBC driver
     // Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
     } catch(ClassNotFoundException e) {
     e.printStackTrace();
     System.exit(1);
     try {
     System.out.print("Connecting to " + dbName + " database...\n\n");
     // InstantDB
     String url = "jdbc:idb:" + dbName;
     // InstantDB, specify the configuration file name in URL
     conn = DriverManager.getConnection(url + ".prp");
     // MS Access
     //conn = DriverManager.getConnection(url);
     System.out.println("Connected to and created database " + dbName);
     System.out.print("Accessing new " + tableName + " table...\n\n");
     stmt = conn.createStatement();
     } catch (SQLException se) {
     se.printStackTrace();
     System.exit(1);
int id=0;
//Go to the last record of the result set to get the next Survey ID
String queryString = "SELECT * FROM " + tableName ;
     ResultSet rset = stmt.executeQuery(queryString);
     while (rset.next()) {
     id = rset.getInt("surveyid");
     id++; // This is the Survey ID for this new survey.
rset.close();
int service[] = {0,0,0,0,0,0};
int level[] = {0,0,0,0,0};
Body body = new Body();
Html html = new Html()
.addElement(new Head()
     .addElement(new Title("Survey Conformation")))
.addElement(body);
body.addElement(new H1("Thank you! Your Survey is accepted."));
body.addElement(request.getParameter("salutation") + " " +
          request.getParameter("firstname") + " " +
          request.getParameter("lastname"))
.addElement(new BR());
body.addElement(request.getParameter("company"))
.addElement(new BR());
body.addElement(request.getParameter("street"))
.addElement(new BR());
body.addElement(request.getParameter("city") + " " +
          request.getParameter("state") + " " +
          request.getParameter("postal"))
.addElement(new BR());
body.addElement(request.getParameter("country"))
.addElement(new BR());
body.addElement("Email: " + request.getParameter("email"))
.addElement(new BR())
.addElement(new BR());
body.addElement("You Travelled with us to : " +
          request.getParameter("destination"))
.addElement(new BR());
body.addElement("You used our following Services : ");
body.addElement(new BR());
String values[] = request.getParameterValues("service");
if (values != null) {
UL list = new UL();
for (int i = 0; i < values.length; i++) {
     list.addElement(new LI(values));
     // setup category 1 feedback
     if (values[i] != null)
     service[i] = 1;
body.addElement(list);
body.addElement(new BR());
body.addElement("Your satisfaction level : ");
     body.addElement(request.getParameter("level") + " " +
               request.getParameter("good") + " " +
               request.getParameter("better") + " " +
               request.getParameter("best") + " " +
               request.getParameter("very poor quality") + " " +
               request.getParameter("none"))
.addElement(new BR());
body.addElement("You said we Can improve our Service as follows: " +
          request.getParameter("comments"));
out.println(html.toString());
//set up category level feed back
     if (request.getParameter("good") != null)
     level[1] = 1;
     else if (request.getParameter("better") != null)
     level[2] = 1;
     else if (request.getParameter("best") != null)
     level[3] = 1;
     else if (request.getParameter("very poor quality") != null)
     level[4] = 1;
     else if (request.getParameter("none") != null)
level[5] = 1;
//Now write the collected data into the database
String insertString = "INSERT intO" + tableName+
id + "," + service[1] + "," + service[2] + "," + service[3] + "," +
+ service[4] + "," + service[5] + "," + service[6] + "," +
+ level[1] + "," + level[2] + "," + level[3] + "," +
+ level[4] + "," + level[5] ;
stmt.close();
conn.close();
-------------------------Compile Errors ---------------------------------------------------------------------------------
I am getting following error for the exception handling. Can someone help me !!! PLEASE

Answer 1

Hi JDKPSSH,
Do I have to have the database connection in INIT() method ?not mandatory to have it in init() ( not INIT() ) method.
I am getting following error for the exception handling. Can someone help me !!! PLEASE Check out by putting the following statements in try block
stmt.close();
conn.close();otherwise you get a compile time error.
unreported exception java.sql.SQLException; must be caught or declared to be thrown
Thanks,
Sanath Kumar.