Connect Oracle with Java

Question

I want to access oracle database from my java program which is written on Java Swing. e.g suppose my program shows a screen containing a "Name" field and a button "Submit". When i will enter a name and press the submit button the name will be stored into a table . How can i do that?
I use Oracle 8i for database and JDK 1.7.0 for Java environment.

Answer 1

Hi,
Use the below code to connect to the Oracle DB and do the required Operation with the custom parameters for IP etc.,.
public static void updatEmp(int empNo, String eName){
          System.out.println("Oracle Connect Example.");
          Connection conn = null;
          String ipAddress ="";
          //Spedify your IP address
          String tnsName = "";
          // Specify your tns name eg. "orcl"
          String url = "jdbc:oracle:thin:@"+ipAddress+":1521:"+tnsName;
          String driver = "oracle.jdbc.driver.OracleDriver";
          String userName = "scott";
          String password = "tiger";
          try {
          Class.forName(driver).newInstance();
          conn = DriverManager.getConnection(url,userName,password);
          System.out.println("Connected to the database");
          conn.setAutoCommit(false);
          PreparedStatement preStmt = conn.prepareStatement("update emp set ename = ? where empno =?");
          preStmt.setInt(2, empNo);
          preStmt.setString(1,eName);
          preStmt.executeUpdate();
          Statement st = conn.createStatement();
                    // For insertion to oracle
          int i = st.executeUpdate("insert into emp (empno,ename) values("+empno+",'"+ename+"')");
          System.out.println("No. of rows updated = "+i);
                    //For Selection from oracle
          /* ResultSet res = st.executeQuery("SELECT empno,ename FROM EMP ");
          while (res.next()){
               System.out.println("Number of column:"+res.getInt(1));
               System.out.println("Number of column:"+res.getString(2));
               conn.rollback(); */
               // For Updation to oracle
          /*int i = st.executeUpdate("update emp set ename='Hamlet' where empno=7369");
          System.out.println("No. of rows updated = "+i);*/          
          conn.close();
          System.out.println("Disconnected from database");
          } catch (Exception e) {
          e.printStackTrace();
Note:
Have to include the ojdbc14-10.2.0.2.0.jar in your java environment, which is the driver for Java to connect to oracle. If it is in Eclipse include using External jar files. If the java environment is Servers put the jar file in your lib folder under Web-INF folder..:-)
Thanks
Edited by: Ramesh_R on Aug 26, 2009 8:53 PM