详解java调用存储过程并封装成map

详解java调用存储过程并封装成map

           本文代码中注释写的比较清楚不在单独说明，希望能帮助到大家，

实例代码：

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;
       }

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