Connecting to an oracle db with jdbc
I downloaded the jdbc drivers and unzipped them to "C:\SDK\Classes", therefore they're "C:\SDK\Classes\oracle\jdbc\..."
My classpath is set to "C:\SDK\Classes\"
public void connect()
String serverName = "********";
String portNumber = "1521";
String sid = "oracle9";
String url = "jdbc:oracle:thin:@" + serverName + ":" + portNumber + ":" + sid;
String username = "*****";
String password = "*****";
Connection connection = null;
try
String driverName = "oracle.jdbc.driver.OracleDriver";
Class.forName(driverName);
// Create a connection to the database
connection = DriverManager.getConnection(url, username, password);
catch (ClassNotFoundException e)
System.out.println("Could not find the database driver");
catch (SQLException e)
System.out.println("Could not connect to the database");
}I get the error "Could not find the database driver" when i run this.
Can anyone suggest anything?
Thanks!
Check your classpath and webserver library directory
it must be classes12.jar file in the lib directory that using the webserver
or classpath
.;c:\jdk1.3.1\extlib\classes12.jar;
and check your jdbc driver version
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Connecting Oracle 8i with JDBC
Hi Friends,
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Does anyone have any fixes, recomendations, or advice?
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Local oracle access with jdbc thin
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it need help despratly,
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package dbfinder;
import java.sql.*;
import javax.sql.*;
import com.sun.rowset.JdbcRowSetImpl;
import javax.sql.rowset.JdbcRowSet;
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* <p>Title: </p>
* <p>Description: </p>
* <p>Copyright: Copyright (c) 2005</p>
* <p>Company: </p>
* @author not attributable
* @version 1.0
public class DatabaseConnector {
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// ResultSetMetaData metaData;
String DATABASE_DRIVER = "com.mysql.jdbc.Driver";
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String USER = "cis695d";
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C:\jdk1.5.0\jre\lib\ext\mysql-connector-java-3.0.16-ga
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It's your code.
What are you doing with all that RowSet stuff?
This works. Study it:
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import java.util.*;
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public class DataConnection
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public static final String DEFAULT_URL = "jdbc:odbc:DRIVER={Microsoft Access Driver (*.mdb)};DBQ=c:\\Edu\\Java\\Forum\\DataConnection.mdb";
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public static final String DEFAULT_PASSWORD = "";
public static final String DEFAULT_DRIVER = "com.mysql.jdbc.Driver";
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* <li>SQL query string</li>
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* <li>password</li>
* </ol>
public static void main(String [] args)
DataConnection db = null;
try
if (args.length > 0)
String sql = args[0];
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String url = ((args.length > 2) ? args[2] : DEFAULT_URL);
String username = ((args.length > 3) ? args[3] : DEFAULT_USERNAME);
String password = ((args.length > 4) ? args[4] : DEFAULT_PASSWORD);
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System.out.println("driver : " + driver);
System.out.println("url : " + url);
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System.out.println("password: " + password);
db = new DataConnection(driver, url, username, password);
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Object result = db.executeSQL(sql);
System.out.println(result);
else
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catch (SQLException e)
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System.err.println("SQL state: " + e.getSQLState());
e.printStackTrace(System.err);
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if (db != null)
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final String url,
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final String password)
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if (info != null)
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Statement statement = null;
ResultSet rs = null;
try
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boolean hasResultSet = statement.execute(sql);
if (hasResultSet)
rs = statement.getResultSet();
ResultSetMetaData meta = rs.getMetaData();
int numColumns = meta.getColumnCount();
List rows = new ArrayList();
while (rs.next())
Map thisRow = new LinkedHashMap();
for (int i = 1; i <= numColumns; ++i)
String columnName = meta.getColumnName(i);
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thisRow.put(columnName, value);
rows.add(thisRow);
returnValue = rows;
else
int updateCount = statement.getUpdateCount();
returnValue = new Integer(updateCount);
finally
close(rs);
close(statement);
return returnValue;
* Close a database connection
* @param connection to close
public static final void close(Connection connection)
try
if (connection != null)
connection.close();
connection = null;
catch (SQLException e)
e.printStackTrace();
* Close a statement
* @param statement to close
public static final void close(Statement statement)
try
if (statement != null)
statement.close();
statement = null;
catch (SQLException e)
e.printStackTrace();
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* @param rs to close
public static final void close(ResultSet rs)
try
if (rs != null)
rs.close();
rs = null;
catch (SQLException e)
e.printStackTrace();
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public static final void close(Connection connection, Statement statement)
close(statement);
close(connection);
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* @param connection to close
* @param statement to close
* @param rs to close
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ResultSet rs)
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close(statement);
close(connection);
}% -
Use of Complex Oracle Object with JDBC
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[email protected]<code>
CREATE TYPE EMPLOYEE_GRADES AS TABLE OF VARCHAR2(50)
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I've installed
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Your first attempt sqlplus savantdb@//192.168.100.37:1521/orcl uses the so-called "easy connect" method.
That's actually not a bad idea, as it is fairly short and does not require a "tnsnames.ora" file, which is a pain in the somewhere or else.
sqlplus has a parsing problem if you don't enclose part of the string in double quotes. You cannot find that in the documentation, but in Metalink Note 274757.1.
The syntax is like this:
sqlplus savantdb@\"//192.168.100.37:1521/orcl\"
Your second attempt tries to use the TNS (local) naming method, but for that you need to have an environment variable TNS_ADMIN pointing to the directory containing "tnsnames.ora". It does not matter if that directory is your current directory or not. You don't need that if you use the method described above.
The last error message is because of the annoying behaviour of sqlplus to ask for username and password (for a local connection!) again if the first attempt failed.
You can avoid that by giving sqlplus the -L flag.
Yours,
Laurenz Albe
PS: If you want to "make it totally non-interactive" you should add a password, like
sqlplus savantdb/password@//192.168.100.37:1521/orcl
In that case, you don't need to add the \" -
Trouble to connect to Oracle Lite with JDBC
Hi.
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Distributed Database Consulting, Inc.
http://www.ddbcinc.com/askDDBC -
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// header - edit "Data/yourJavaHeader" to customize
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Statement stmt = null;
try
System.out.println("Hello 1");
Class.forName("oracle.jdbc.driver.OracleDriver");
System.out.println("Hello 2");
catch(java.lang.ClassNotFoundException e)
System.err.print("ClassNotFoundException: ");
System.err.println(e.getMessage());
try
System.out.println("Hello 2");
//connection = DriverManager.getConnection("jdbc:oracle:thin:@172.20.134.95:1521:SNP", "system", "manager");
connection = DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:SNP", "system", "manager");
stmt = connection.createStatement();
catch(java.sql.SQLException ex)
System.err.print("SQLException: ");
System.err.println(ex.getMessage());
try
System.out.println("Hello 3");
if (stmt!=null)
{stmt.close();}
if (connection!=null)
{connection.close();}
catch(Exception e)
e.printStackTrace();
//load the driver
try
Class.forName("oracle.jdbc.driver.OracleDriver");
//Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
String sourceURL = "jdbc:oracle:thin:@172.20.134.95:1521:SNP";
//String sourceURL = "jdbc:oracle:thin:@172.20.134.95:389:SNP";
String user = "system";
String password = "manager";
Connection databaseConnection = DriverManager.getConnection(sourceURL, user, password);
System.out.println("connected");
databaseConnection.close();
catch (ClassNotFoundException cnfe)
System.out.println(cnfe);
catch(SQLException sqle)
System.err.println(sqle);
Do not uncomment the codes i put as comments coz they are not used :)
I really need help here..thankz.Hi:
That error code is Service Name related error.
Oracle error docs has the following
TNS-12505 TNS:listener could not resolve SID given in connect descriptor
Cause: The SID in CONNECT_DATA was not found in the listener's tables.
Action: Check to make sure that the SID specified is correct. The SIDs that are currently registered with the listener can be obtained by typing "LSNRCTL SERVICES listener_name". These SIDs correspond to SID_NAMEs in TNSNAMES.ORA, or DB_NAMES in the INIT.ORA file. -
Connecting Java application to Oracle Database with JDBC
How can I connect my Java application using Oracle 11g database?
Please provide the steps involved along with the coding.What kind of Java application? Stand alone/desktop? Or web? Do you need dedicated, individual connections, or connection pooling for 10,000 concurrent users?
You'll find a few clues in This Article [This Article|http://javawebdb.com/2012/01/30/connecting-a-java-servlet-to-a-database/] -
Please explain how to connect to an Oracle database with CF9 standard
Can someone walk me through this process? I am trying to help a group that upgraded frmo cf8 enterprise to cf9 standard.
1. You'll need to download the Oracle JDBC Drivers (http://www.oracle.com/technetwork/database/features/jdbc/index-091264.html)
2. Put the appropriate .jar files in your <coldfusion>/lib folder
3. Restart CF
4. Create a Datasource using the "Other" option
5. Create an appropriate connection string
Examples:
jdbc:oracle:thin:[USER/PASSWORD]@[HOST][:PORT]:SID
jdbc:oracle:thin:[USER/PASSWORD]@//[HOST][:PORT]/SERVICE
It has been a long time since I have done this, but I have done it and know it works. I remember the issue with SID vs SERVICE being a huge PITA.
Good luck,
Jason -
How to connect a remote Oracle Server with its IP
is it possible to connect Oracle SerVer in VC
I have used Microsoft ODBC driver for oracle and Oracle odbc driver to test in VC++6.0,
but SQLDriverConnect, OCI methods failed.with VC++ an odbc driver for oracle is also installed with which u can connect to oracle db all u need to know is the database SID or oracle server name
try doing this it will work hopefully
regards
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