Thread: Java access pgsql sample
Hi!
Help me with this sample. It don't work:
Linux Conectiva
Postgresql 7.2.1
pgjdbc2.jar
/etc/profile
JAVA_HOME="/usr/java/jsdk"
J2EE_HOME="/usr/java/j2ee"
CLASSPATH=".:$JAVA_HOME/lib:$J2EE_HOME/lib:/usr/java/jsdk/corejava/corejava.zip"
J2EE_CLASSPATH=$CLASSPATH
PATH="$PATH:$JAVA_HOME/bin:$J2EE_HOME/bin"
export JAVA_HOME J2EE_HOME CLASSPATH J2EE_CLASSPATH
import java.sql.*;
public class SQLStatement {
public static void main(String args[]) {
String url = "jdbc:postgresql:javatest";
Connection con;
String query = "select col1 from test";
Statement stmt;
try {
Class.forName("org.postgresql.Driver");
} catch(java.lang.ClassNotFoundException e) {
System.err.print("ClassNotFoundException: ");
System.err.println(e.getMessage());
}
try {
con = DriverManager.getConnection(url,"postgres", "postgres");
stmt = con.createStatement();
ResultSet rs = stmt.executeQuery(query);
ResultSetMetaData rsmd = rs.getMetaData();
int numberOfColumns = rsmd.getColumnCount();
int rowCount = 1;
while (rs.next()) {
System.out.println("Linha " + rowCount + ": ");
for (int i = 1; i <= numberOfColumns; i++) {
System.out.print(" Coluna " + i + ": ");
System.out.println(rs.getString(i));
}
System.out.println("");
rowCount++;
}
stmt.close();
con.close();
} catch(SQLException ex) {
System.err.print("SQLException: ");
System.err.println(ex.getMessage());
}
}
}
Errors:
ClassNotFoundException: org/postgresql/Driver
SQLException: driver not found: jdbc:postgresql:javatest
Thank you for attention. Sorry ny english (brasilian).
Where did you put the postgres jar, and where is it referenced in the
classpath?
Dave
On Thu, 2002-07-25 at 15:10, Ribamar FS wrote:
> Hi!
>
> Help me with this sample. It don't work:
>
> Linux Conectiva
> Postgresql 7.2.1
> pgjdbc2.jar
>
> /etc/profile
> JAVA_HOME="/usr/java/jsdk"
> J2EE_HOME="/usr/java/j2ee"
> CLASSPATH=".:$JAVA_HOME/lib:$J2EE_HOME/lib:/usr/java/jsdk/corejava/corejava.zip"
> J2EE_CLASSPATH=$CLASSPATH
> PATH="$PATH:$JAVA_HOME/bin:$J2EE_HOME/bin"
> export JAVA_HOME J2EE_HOME CLASSPATH J2EE_CLASSPATH
>
>
> import java.sql.*;
> public class SQLStatement {
> public static void main(String args[]) {
> String url = "jdbc:postgresql:javatest";
> Connection con;
> String query = "select col1 from test";
> Statement stmt;
> try {
> Class.forName("org.postgresql.Driver");
> } catch(java.lang.ClassNotFoundException e) {
> System.err.print("ClassNotFoundException: ");
> System.err.println(e.getMessage());
> }
> try {
> con = DriverManager.getConnection(url,"postgres", "postgres");
>
> stmt = con.createStatement();
>
> ResultSet rs = stmt.executeQuery(query);
> ResultSetMetaData rsmd = rs.getMetaData();
> int numberOfColumns = rsmd.getColumnCount();
> int rowCount = 1;
> while (rs.next()) {
> System.out.println("Linha " + rowCount + ": ");
> for (int i = 1; i <= numberOfColumns; i++) {
> System.out.print(" Coluna " + i + ": ");
> System.out.println(rs.getString(i));
> }
> System.out.println("");
> rowCount++;
> }
> stmt.close();
> con.close();
>
> } catch(SQLException ex) {
> System.err.print("SQLException: ");
> System.err.println(ex.getMessage());
> }
> }
> }
>
>
> Errors:
> ClassNotFoundException: org/postgresql/Driver
> SQLException: driver not found: jdbc:postgresql:javatest
>
>
> Thank you for attention. Sorry ny english (brasilian).
>
>
> ---------------------------(end of broadcast)---------------------------
> TIP 3: if posting/reading through Usenet, please send an appropriate
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> message can get through to the mailing list cleanly
>
>
Hi,
Please check your jdbc url, it looks wrong to me. It should be in the form
jdbc:postgresql://<database server ip or hostname>:<database port>/<instance
name>
Eg. jdbc:postgresql://123.123.123.123:5432/javatest
Where 123.123.123.123 is the server on which you are running postgres
database and 5432 is it's default port, change port if you have specified a
diff one. javatest is the instance name in your case.
Thanks
Yuva
-----Original Message-----
From: Ribamar FS [mailto:ribafs@myrealbox.com]
Sent: Thursday, July 25, 2002 12:11 PM
To: pgsql-jdbc@postgresql.org
Subject: [JDBC] Java access pgsql sample
Hi!
Help me with this sample. It don't work:
Linux Conectiva
Postgresql 7.2.1
pgjdbc2.jar
/etc/profile
JAVA_HOME="/usr/java/jsdk"
J2EE_HOME="/usr/java/j2ee"
CLASSPATH=".:$JAVA_HOME/lib:$J2EE_HOME/lib:/usr/java/jsdk/corejava/corejava.
zip"
J2EE_CLASSPATH=$CLASSPATH
PATH="$PATH:$JAVA_HOME/bin:$J2EE_HOME/bin"
export JAVA_HOME J2EE_HOME CLASSPATH J2EE_CLASSPATH
import java.sql.*;
public class SQLStatement {
public static void main(String args[]) {
String url = "jdbc:postgresql:javatest";
Connection con;
String query = "select col1 from test";
Statement stmt;
try {
Class.forName("org.postgresql.Driver");
} catch(java.lang.ClassNotFoundException e) {
System.err.print("ClassNotFoundException: ");
System.err.println(e.getMessage());
}
try {
con = DriverManager.getConnection(url,"postgres",
"postgres");
stmt = con.createStatement();
ResultSet rs = stmt.executeQuery(query);
ResultSetMetaData rsmd = rs.getMetaData();
int numberOfColumns = rsmd.getColumnCount();
int rowCount = 1;
while (rs.next()) {
System.out.println("Linha " + rowCount + ":
");
for (int i = 1; i <= numberOfColumns; i++) {
System.out.print(" Coluna " + i +
": ");
System.out.println(rs.getString(i));
}
System.out.println("");
rowCount++;
}
stmt.close();
con.close();
} catch(SQLException ex) {
System.err.print("SQLException: ");
System.err.println(ex.getMessage());
}
}
}
Errors:
ClassNotFoundException: org/postgresql/Driver
SQLException: driver not found: jdbc:postgresql:javatest
Thank you for attention. Sorry ny english (brasilian).
---------------------------(end of broadcast)---------------------------
TIP 3: if posting/reading through Usenet, please send an appropriate
subscribe-nomail command to majordomo@postgresql.org so that your
message can get through to the mailing list cleanly
Hi,
See the url carefully, ':' is missing after "postgresql" i.e before "//". It
should be
jdbc:postgresql://10.0.1.53:5432/javatest
Thanks
Yuva
-----Original Message-----
From: Ribamar FS [mailto:ribafs@myrealbox.com]
Sent: Thursday, July 25, 2002 1:59 PM
To: Yuva Chandolu
Subject: Re: RE: RE: [JDBC] Java access pgsql sample
Really. After insert in classpath the error is now:
SQLException: driver not found: jdbc:postgresql//10.0.1.53:5432/javatest
Thank you again.
-----Original Message-----
From: Yuva Chandolu <ychandolu@ebates.com>
To: 'Ribamar FS' <ribafs@myrealbox.com>
Date: Thu, 25 Jul 2002 13:54:08 -0700
Subject: RE: RE: [JDBC] Java access pgsql sample
Hi,
Class org.postgresql.Driver is not found, so as Dave said, now it is your
classpath problem. See that pgjdbc2.jar is in classpath.
Thanks
Yuva
-----Original Message-----
From: Ribamar FS [mailto:ribafs@myrealbox.com]
Sent: Thursday, July 25, 2002 1:25 PM
To: Yuva Chandolu
Subject: Re: RE: [JDBC] Java access pgsql sample
Atfer changes receive:
[root@boaviagem meus]# java SQLStatement
ClassNotFoundException: org/postgresql/Driver
SQLException: driver not found: jdbc:postgresql//localhost:5432/javatest
Thank you for your attention.
-----Original Message-----
From: Yuva Chandolu <ychandolu@ebates.com>
To: 'Ribamar FS' <ribafs@myrealbox.com>, pgsql-jdbc@postgresql.org
Date: Thu, 25 Jul 2002 12:24:52 -0700
Subject: RE: [JDBC] Java access pgsql sample
Hi,
Please check your jdbc url, it looks wrong to me. It should be in the form
jdbc:postgresql://<database server ip or hostname>:<database port>/<instance
name>
Eg. jdbc:postgresql://123.123.123.123:5432/javatest
Where 123.123.123.123 is the server on which you are running postgres
database and 5432 is it's default port, change port if you have specified a
diff one. javatest is the instance name in your case.
Thanks
Yuva
-----Original Message-----
From: Ribamar FS [mailto:ribafs@myrealbox.com]
Sent: Thursday, July 25, 2002 12:11 PM
To: pgsql-jdbc@postgresql.org
Subject: [JDBC] Java access pgsql sample
Hi!
Help me with this sample. It don't work:
Linux Conectiva
Postgresql 7.2.1
pgjdbc2.jar
/etc/profile
JAVA_HOME="/usr/java/jsdk"
J2EE_HOME="/usr/java/j2ee"
CLASSPATH=".:$JAVA_HOME/lib:$J2EE_HOME/lib:/usr/java/jsdk/corejava/corejava.
zip"
J2EE_CLASSPATH=$CLASSPATH
PATH="$PATH:$JAVA_HOME/bin:$J2EE_HOME/bin"
export JAVA_HOME J2EE_HOME CLASSPATH J2EE_CLASSPATH
import java.sql.*;
public class SQLStatement {
public static void main(String args[]) {
String url = "jdbc:postgresql:javatest";
Connection con;
String query = "select col1 from test";
Statement stmt;
try {
Class.forName("org.postgresql.Driver");
} catch(java.lang.ClassNotFoundException e) {
System.err.print("ClassNotFoundException: ");
System.err.println(e.getMessage());
}
try {
con = DriverManager.getConnection(url,"postgres",
"postgres");
stmt = con.createStatement();
ResultSet rs = stmt.executeQuery(query);
ResultSetMetaData rsmd = rs.getMetaData();
int numberOfColumns = rsmd.getColumnCount();
int rowCount = 1;
while (rs.next()) {
System.out.println("Linha " + rowCount + ":
");
for (int i = 1; i <= numberOfColumns; i++) {
System.out.print(" Coluna " + i +
": ");
System.out.println(rs.getString(i));
}
System.out.println("");
rowCount++;
}
stmt.close();
con.close();
} catch(SQLException ex) {
System.err.print("SQLException: ");
System.err.println(ex.getMessage());
}
}
}
Errors:
ClassNotFoundException: org/postgresql/Driver
SQLException: driver not found: jdbc:postgresql:javatest
Thank you for attention. Sorry ny english (brasilian).
---------------------------(end of broadcast)---------------------------
TIP 3: if posting/reading through Usenet, please send an appropriate
subscribe-nomail command to majordomo@postgresql.org so that your
message can get through to the mailing list cleanly