java map 详解java调用存储过程并封装成map

public List<Map<String , Object>> doCallProcedure(String procedureString,String[] parameters) 
                   throws PersistentDataOperationException { 
             if (!isReady ()) { 
                   throw new PersistentDataOperationException( "DAO is not ready."); 
             } 
            ResultSet rs = null; 
            List<Map< String, Object>> list = new ArrayList<Map<String ,Object>>(); 
             try { 
                   Connection con=session.connection(); 
                   String procedure = "{call "+procedureString+ "(?,?,?) }"; //拼装调用存储过程字符串 
                  CallableStatement cstmt = con.prepareCall (procedure ); //调用存储过程 
                  cstmt.setString (1,parameters [0 ]); //设置入参 
                  cstmt.setInt (2, Integer. parseInt( parameters[ 1])) ;//设置入参 
                  cstmt.registerOutParameter (3, oracle.jdbc.OracleTypes.CURSOR ); //设置出参 
                   
                  cstmt.execute (); //执行提交 
                  rs = (ResultSet ) cstmt.getObject (3 ); //获取出参，3为参数顺序数 
                  ResultSetMetaData rsm =rs.getMetaData (); //获得列集 
                  Map< String, Object> map= null; 
                   int col = rsm.getColumnCount ();  //获得列的个数 
                   String colName [] = new String[ col] ;//列名集合 
                   for (int i = 0; i < col; i++) { 
                        colName [i ] = rsm.getColumnName (i+1 ); 
                   } 
                   while( rs.next()){ 
                         //注意访问结果集是从索引位置1开始的，而不是0 
                        map = new HashMap< String, Object> (); 
                         for (int j = 0; j < colName.length; j++) { 
                              map.put (colName [j ], rs.getString (j+1 )); 
                         } 
                        list.add (map ); 
                   } 
                   session.flush (); 
             } catch (HibernateException e) { 
                   throw new PersistentDataOperationException( e) ; 
             } catch (SQLException e) { 
                  e.printStackTrace (); 
             } 
             return list; 
       }