jsp自定义标签下拉框(2)

     public static ResultSet runSelectSql(String sql,Object[] params)
     {
         Connection con=null;
         PreparedStatement pre=null;
         ResultSet res=null;
         
         try {
             con=getConnection();
             pre=con.prepareStatement(sql);
           for(int i=0;i<params.length;i++)
           {
               pre.setObject(i+1, params[i]);
               
           }
           res=pre.executeQuery();
         } catch (Exception e) {
             // TODO Auto-generated catch block
             e.printStackTrace();
         }
         return res;
     }
     
     //运行没有结果，没有参数的sql语句
     public static boolean runUpdateSql(String sql)
     
     {
         Connection con=null;
         PreparedStatement ps=null;
         ResultSet res=null;
         try
         {
             con=getConnection();
             ps=con.prepareStatement(sql);
             
         ps.executeUpdate();
         return true;
             
         }
         catch(Exception e)
         {
             e.printStackTrace();