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try 
   {
    // ¼ÓÔØÇý¶¯Àà
    Class.forName("oracle.jdbc.driver.OracleDriver");
    String sourceURL = "jdbc:oracle:thin:@127.0.0.1:1521:orcl";
    String user = "system";
    String password = "sa";
    // ½¨Á¢Á¬½Ó
    Connection databaseConnection = DriverManager.getConnection(
      sourceURL, user, password);
    // Á¬½Ó³É¹¦
    System.out.println("Connectinon established successfully!");
    databaseConnection.close();
   } 
   catch (ClassNotFoundException cnfe) 
   {
    System.err.println(cnfe);
   } 
   catch (SQLException sqle) 
   {
    System.err.println(sqle);
   }
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import java.sql.DriverManager;
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import java.sql.Statement;
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