最新做了一个连接Oracle的代码，要配好环境变量： ClassPath=.;E:j2sdk14lib ools.jar;E:oracleora90jdbclibclasses12.zip
测试的电脑已经装好Oracle客户端，而且用SQLplus可以连接上。
/*
* This sample shows how to list all the names from the EMP table
*
* It uses the JDBC THIN driver.  See the same program in the
* oci8 samples Directory to see how to use the other drivers.
*/ // You need to import the Java.sql package to use JDBC
import java.sql.*; class Test
{
  public static void main (String args [])
       throws SQLException
  {
    // Load the Oracle JDBC driver
    DriverManager.registerDriver(new oracle.jdbc.OracleDriver());
/* try{
  Class.forName("oracle.jdbc.driver.OracleDriver");
}catch(Exception e){
  System.out.println("No Driver!");
}
*/
    // Connect to the database
    // You must put a database name after the @ sign in the connection URL.
    // You can use either the fully specified SQL*net syntax or a short cut
    // syntax as <host>:<port>:<sid>.  The example uses the short cut syntax.
    String url = "jdbc:oracle:thin:@172.28.31.85:1521:YIKATONG";
    String userName = "scott";
    String passWord = "tiger";     if (args.length > 0) url = args[0];
    if (args.length > 1) userName = args[1];
    if (args.length > 2) password = args[2];
System.out.println(url);
System.out.println(userName);
System.out.println(password);
    Connection conn =
      DriverManager.getConnection (url, userName, password);     // Create a Statement
    Statement stmt = conn.createStatement ();    // Select the ENAME column from the EMP table
    ResultSet rset = stmt.executeQuery ("select * from Test");     // Iterate through the result and print the employee names
    while (rset.next ())
      System.out.println (rset.getString (1));
  }
}