Hello all,
This is one of those really painful ones where I had it working, didn't save a backup, made a few changes, and now I can't figure out how to get it working again. I'm working on a JSF/PostgreSQL application and I've lifted the bulk of this portion straight from Chapter 5 of the “Core JSF” book. I cannot for the life of me figure out what is wrong here.
The page displaying the datatable filled with the resultset is “main.jsp”, and every time I load it I get the following error:
[ServletException in:/WEB-INF/pages/main.jsp] javax/servlet/jsp/jstl/sql/Result'
The page is also using data from a “Person” bean containing login information that works fine. I know the query is correct and that the DB is up and running, but for some reason my resultset/datatable connection is just dead in the water. The offending code is pasted below, any help would be much appreciated.
Thanks,
Alex
**********
main.jsp
**********
<!doctype html public "-//w3c//dtd html 4.0 transitional//en">
<%@ taglib uri=" prefix="h" %>
<%@ taglib uri=" prefix="f" %>
<%@ taglib uri=" prefix="c" %>
<f:view>
<h2>Welcome,
<h
utputText value="#{person.firstName}" escape="false"/>
</h2>
<P>I see by your outfit that you are a <hutputText value="#{person.userRole}" escape="false"/></P>
<P>Here are the farms in the database:</P>
<!-- begin fields datatable -->
<h:dataTable value="#{fieldview.farms}" var="farm">
<h:column>
<f:facet name="header">
ID
</f:facet>
<hutputText value="#{fieldview.id}"/>
</h:column>
<h:column>
<f:facet name="header">
Name
</f:facet>
<hutputText value="#{fieldview.name}"/>
</h:column>
</h:dataTable>
<!-- end fields datatable -->
</f:view>
******************************************************************
FieldView.java (backing bean that is set up in the faces-config file as “fieldview”)
******************************************************************
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import javax.naming.NamingException;
import javax.servlet.jsp.jstl.sql.Result;
import javax.servlet.jsp.jstl.sql.ResultSupport;
import java.sql.DriverManager;
public class FieldView {
private Connection conn;
/**
* @param args
*/
public FieldView() {
}
public Result getFarms() throws SQLException, NamingException {
try {
connect();
Statement stmt = conn.createStatement();
ResultSet result = stmt.executeQuery("select * from farm");
return ResultSupport.toResult(result);
} finally {
close();
}
}
public void close() throws SQLException {
if (conn == null) return;
conn.close();
conn = null;
}
public void connect(){
try {
Class.forName("org.postgresql.Driver");
} catch (ClassNotFoundException cnfe) {
System.out.println("Couldn't find the driver!");
System.out.println("Let's print a stack trace, and exit.");
cnfe.printStackTrace();
System.exit(1);
}
try {
this.conn = DriverManager.getConnection("jdbcostgresql://127.0.0.1/<dbname>",
"<my username>", "<my password>");
} catch (SQLException se) {
System.out.println("Couldn't connect: print out a stack trace and exit.");
se.printStackTrace();
System.exit(1);
}
}
}
This is one of those really painful ones where I had it working, didn't save a backup, made a few changes, and now I can't figure out how to get it working again. I'm working on a JSF/PostgreSQL application and I've lifted the bulk of this portion straight from Chapter 5 of the “Core JSF” book. I cannot for the life of me figure out what is wrong here.
The page displaying the datatable filled with the resultset is “main.jsp”, and every time I load it I get the following error:
[ServletException in:/WEB-INF/pages/main.jsp] javax/servlet/jsp/jstl/sql/Result'
The page is also using data from a “Person” bean containing login information that works fine. I know the query is correct and that the DB is up and running, but for some reason my resultset/datatable connection is just dead in the water. The offending code is pasted below, any help would be much appreciated.
Thanks,
Alex
**********
main.jsp
**********
<!doctype html public "-//w3c//dtd html 4.0 transitional//en">
<%@ taglib uri=" prefix="h" %>
<%@ taglib uri=" prefix="f" %>
<%@ taglib uri=" prefix="c" %>
<f:view>
<h2>Welcome,
<h
utputText value="#{person.firstName}" escape="false"/></h2>
<P>I see by your outfit that you are a <h
utputText value="#{person.userRole}" escape="false"/></P><P>Here are the farms in the database:</P>
<!-- begin fields datatable -->
<h:dataTable value="#{fieldview.farms}" var="farm">
<h:column>
<f:facet name="header">
ID
</f:facet>
<h
utputText value="#{fieldview.id}"/></h:column>
<h:column>
<f:facet name="header">
Name
</f:facet>
<h
utputText value="#{fieldview.name}"/></h:column>
</h:dataTable>
<!-- end fields datatable -->
</f:view>
******************************************************************
FieldView.java (backing bean that is set up in the faces-config file as “fieldview”)
******************************************************************
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import javax.naming.NamingException;
import javax.servlet.jsp.jstl.sql.Result;
import javax.servlet.jsp.jstl.sql.ResultSupport;
import java.sql.DriverManager;
public class FieldView {
private Connection conn;
/**
* @param args
*/
public FieldView() {
}
public Result getFarms() throws SQLException, NamingException {
try {
connect();
Statement stmt = conn.createStatement();
ResultSet result = stmt.executeQuery("select * from farm");
return ResultSupport.toResult(result);
} finally {
close();
}
}
public void close() throws SQLException {
if (conn == null) return;
conn.close();
conn = null;
}
public void connect(){
try {
Class.forName("org.postgresql.Driver");
} catch (ClassNotFoundException cnfe) {
System.out.println("Couldn't find the driver!");
System.out.println("Let's print a stack trace, and exit.");
cnfe.printStackTrace();
System.exit(1);
}
try {
this.conn = DriverManager.getConnection("jdbc
ostgresql://127.0.0.1/<dbname>","<my username>", "<my password>");
} catch (SQLException se) {
System.out.println("Couldn't connect: print out a stack trace and exit.");
se.printStackTrace();
System.exit(1);
}
}
}
