package com.mingri.dbconn;import java.sql.*;import javax.naming.*;import javax.sql.DataSource;public class DBConn{  public static synchronized Connection getConnection() throws Exception{    try{      Context initCtx=new javax.naming.InitialContext();      //從Context中lookup數據源      Context envCtx=(Context)initCtx.lookup("java:comp/env");      DataSource ds=(DataSource)envCtx.lookup("jdbc/mingri");      return ds.getConnection();    }    catch(SQLException e){      throw e;    }    catch(NamingException e){      throw e;    }  }}