Passing Resultsets to JSP

Question

Hello,
I want to know how to represent the results of a databse search via a JSP. Initially, I had all of the databse code(example shown below) in the JSP just to get it working. I now want to move the code into a JavaBean (I know there are numerous other ways but as I am still learning I just want to use a Worker Bean). Whilst the code was in the JSP it was easy to display the data using rs.next() etc etc, but now the code is in the bean how do I pass a resultset back to the JSP. Do I use getProperty some how?
Any help is appreciated
Cheers
Mitch
<%
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
Connection dbaCon = DriverManager.getConnection
("jdbc:odbc:MileEnd", "", "");
String template = "UPDATE PlayerInfo SET Block = ? WHERE LastName = ? and FirstName = ? and password = ?";
PreparedStatement pstmt = dbaCon.prepareStatement(template);
pstmt.setBoolean(1, state);
pstmt.setString(2, lastName);
pstmt.setString(3, firstName);
pstmt.setString(4, password);
pstmt.executeUpdate();
if (pstmt != null)
pstmt.close();
if (dbaCon != null)
dbaCon.close();
%>

Answer 1

Your example will not generate any ResultSet, it gives you an int value saying that, how many rows have been updated.
int rowsUpdated=pstmt.executeUpdate();
return rowsUpdated;
Suppose if you have a query like 'select a,b,c from table_name where some_condition', then you will get a ResultSet. Instead of returning the ResultSet as it is to the jsp, it is better to put them in an array or Vector or some collection object and return that object. So that you can immediately close the resultset and release the db resources.
ResultSet rs=st.executeQuery();
Vector v = new Vector();
while(rs.next())
String str[]=new String[3];
str[0]=rs.getString("a"); //or str[0]=rs.getString(1);
str[1]=rs.getString("b");
str[2]=rs.getString("c");
v.add(str);
// close all the database resources and then return the vector.
return v;
In your jsp, you can get this vector and display the results.
for(int i=0;i<v.size();i++)
String str[]=(String[])v.elementAt(i);
// display str[0],str[1] and str[2]
Hope this helps.
Sudha