首先,你要将oracle的驱动classes12.zip加到环境变量中去。public String ConnDatabase()
throws SQLException, ClassNotFoundException{
Class.forName("oracle.jdbc.driver.OracleDriver");
Connection conn = DriverManager.getConnection("jdbc:oracle:thin:@127.0.0.1:1521:ORCL",
                "system","manager");
Statement stmt = conn.createStatement();
String sque = "select sysdate from dual";
ResultSet rset = stmt.executeQuery(sque);
while(rset.next())
{
String sDate = rset.getString(1);
}
   return  sDate ;
  rset.close();
   stmt.close();
   conn.close();
}然后就可以了