使用JDBC链接Oracle

public class OracleJdbcTest 
{ 
String driverClass = "oracle.jdbc.driver.OracleDriver"; 

Connection con; 

public void init(FileInputStream fs) throws ClassNotFoundException, SQLException, FileNotFoundException, IOException 
{ 
Properties props = new Properties(); 
props.load(fs); 
String url = props.getProperty("db.url"); 
String userName = props.getProperty("db.user"); 
String password = props.getProperty("db.password"); 
Class.forName(driverClass); 

con=DriverManager.getConnection(url, userName, password); 
} 

public void fetch() throws SQLException, IOException 
{ 
PreparedStatement ps = con.prepareStatement("select SYSDATE from dual"); 
ResultSet rs = ps.executeQuery(); 

while (rs.next()) 
{ 
// do the thing you do 
} 
rs.close(); 
ps.close(); 
} 

public static void main(String[] args) 
{ 
OracleJdbcTest test = new OracleJdbcTest(); 
test.init(); 
test.fetch(); 
} 
}