Oracle8i JDBC Developer's Guide and Reference Release 3 (8.1.7) Part Number A83724-01 |
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This section provides elementary samples that print employee information from a table and insert employee information into the table.
These samples are located in the following directory on the product CD:
[Oracle Home]/jdbc/demo/samples/oci8/basic-samples
For a step-by-step discussion of basic JDBC functionality, see "First Steps in JDBC".
This example retrieves and prints all the employee names from the EMP
table.
/* * This sample shows how to list all the names from the EMP table */ // You need to import the java.sql package to use JDBC import java.sql.*; class Employee { public static void main (String args []) throws SQLException { // Load the Oracle JDBC driver DriverManager.registerDriver(new oracle.jdbc.driver.OracleDriver()); // Connect to the database // You can put a database name after the @ sign in the connection URL. Connection conn = DriverManager.getConnection ("jdbc:oracle:oci8:@", "scott", "tiger"); // Create a Statement Statement stmt = conn.createStatement (); // Select the ENAME column from the EMP table ResultSet rset = stmt.executeQuery ("select ENAME from EMP"); // Iterate through the result and print the employee names while (rset.next ()) System.out.println (rset.getString (1)); // Close the RseultSet rset.close(); // Close the Statement stmt.close(); // Close the connection conn.close(); } }
This sample uses a prepared statement to insert new employee rows into the EMP
table.
/* This sample shows how to insert data in a table.*/ // You need to import the java.sql package to use JDBC import java.sql.*; class InsertExample { public static void main (String args []) throws SQLException { // Load the Oracle JDBC driver DriverManager.registerDriver(new oracle.jdbc.driver.OracleDriver()); // Connect to the database // You can put a database name after the @ sign in the connection URL. Connection conn = DriverManager.getConnection ("jdbc:oracle:oci8:@", "scott", "tiger"); // Prepare a statement to cleanup the emp table Statement stmt = conn.createStatement (); try { stmt.execute ("delete from EMP where EMPNO = 1500"); } catch (SQLException e) { // Ignore an error here } try { stmt.execute ("delete from EMP where EMPNO = 507"); } catch (SQLException e) { // Ignore an error here too } // Close the statement stmt.close(); // Prepare to insert new names in the EMP table PreparedStatement pstmt = conn.prepareStatement ("insert into EMP (EMPNO, ENAME) values (?, ?)"); // Add LESLIE as employee number 1500 pstmt.setInt (1, 1500); // The first ? is for EMPNO pstmt.setString (2, "LESLIE"); // The second ? is for ENAME // Do the insertion pstmt.execute (); // Add MARSHA as employee number 507 pstmt.setInt (1, 507); // The first ? is for EMPNO pstmt.setString (2, "MARSHA"); // The second ? is for ENAME // Do the insertion pstmt.execute (); // Close the statement pstmt.close(); // Close the connecion conn.close(); } }
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