ORACLE数据库JDBC连接

public static ResultSet getResult(String sql){
<pre name="code" class="java">        Connection con = getConnection();
try{
Statement stmt = con.createStatement() ;
ResultSet rs = stmt.executeQuery(sql) ;
//con.close();
return rs;
}catch(SQLException e){
// TODO Auto-generated catch block
}
return null;
}

private static Connection getConnection(){
try{
Properties p = new Properties();
InputStream in =null;
String driver="";
String username="";
String password="";
String url="";
try{
in=new FileInputStream("WebContent/datasource.properties");
p.load(in);
driver=p.getProperty("jdbc.driverClassName");
url=p.getProperty("jdbc.url");
username=p.getProperty("jdbc.username");
password=p.getProperty("jdbc.password");
System.out.println(driver);
}catch(FileNotFoundException e){
// TODO Auto-generated catch block
e.printStackTrace();
}catch(IOException e){
// TODO Auto-generated catch block
e.printStackTrace();
}
//加载oracle驱动
Class.forName(driver);
Connection con =
DriverManager.getConnection(url , username , password ) ;
return con;
}catch(ClassNotFoundException e){
System.out.println("找不到驱动程序类 ，加载驱动失败！");
e.printStackTrace() ;
}catch(SQLException e){
// TODO Auto-generated catch block
e.printStackTrace();
}
return null;
}

数据库配置文本内容datasource.properties
<p>jdbc.driverClassName=oracle.jdbc.driver.OracleDriver
url=jdbc:oracle:thin:@172.18.94.63/orcl
username=
password=