JDBC - Update

This tutorial describles how to use JDBC to execute an UPDATE statement. Our goal is to execute the following SQL statement.

UPDATE NAMECARD SET EMAIL ='[email protected]' WHERE NO = 1

Refer to the JDBC programming order to complete the main() of UpdateNamecard.java.

1. Loading a JDBC Driver
2. Getting a Connection
3. Execute SQL
4. [If the SQL statement is a select statement, use a ResultSet to process the data.]
5. Returning Resources

NamecardUpdate.java

package net.java_school.jdbc.test;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.sql.Statement;

public class NamecardUpdate {
  static final String URL = "jdbc:oracle:thin:@127.0.0.1:1521:XE";
  static final String USER = "scott";
  static final String PASS = "tiger";
	
  public static void main(String[] args) {
    try {
      Class.forName("oracle.jdbc.driver.OracleDriver");
    } catch (ClassNotFoundException e) {
      e.printStackTrace();
    }

    Connection con = null;
    Statement stmt = null;
		
    String sql = "UPDATE NAMECARD " +
      "SET EMAIL ='[email protected]' " +
      "WHERE NO = 1";
		
    try {
      con = DriverManager.getConnection(URL, USER, PASS);
      stmt = con.createStatement();
      stmt.executeUpdate(sql);
    } catch (SQLException e) {
      e.printStackTrace();
      System.out.println(sql);
    } finally {
      try {
        stmt.close();
      } catch (SQLException e) {
        e.printStackTrace();
      }
      try {
        con.close();
      } catch (SQLException e) {
        e.printStackTrace();
      }
    }
  }

}