Question

我的代码抛出

java.sql.sqlRecoverableException: Sentencia cerrada: next

，用英语，我猜它会是：

java.sql.sqlRecoverableException: Closed statement: next

这是我的代码：

public TransactionArray() throws SQLException {

  /* Obtenemos la tabla de transacciones. */
  Connection connection;
  connection = ConnectionManager.getConnection(STATISTIC_DATA_BASE);
  Statement stmt = null;
  String query =
          "select * " +
          "from " + "dCellStatistic" + ".F_Transaction";
  ResultSet rs = null;
  try {
     stmt = connection.createStatement();
     rs = stmt.executeQuery(query);
  } catch (SQLException e ) {
     e.printStackTrace();
  } finally {
     if (stmt != null) { stmt.close(); }
  }

  /* Construimos las transacciones a partir de los registros. */
  List<Transaction> transactionList = new ArrayList<Transaction>();
  while (rs.next()) { //THE PROBLEM ARISES IN THIS LINE!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
     transactionList.add(new Transaction(rs));
  }
  array = transactionList.toArray(new Transaction[transactionList.size()]);

}

我可能做错的任何线索？我在Code Ranch上看到了两个关于类似问题的线索，但它们似乎都没有为我的案例提供解决方案。

Answer 1

在从结果集中检索信息之前，您正在关闭语句。在stmt.close()循环后移动rs.next()调用（但保持try / finally）。

Answer 2

由于固定代码不适合评论，我将其发布在此处以供将来参考。

public TransactionArray() throws SQLException {
  List<Transaction> transactionList = new ArrayList<Transaction>();

  /* Obtenemos la tabla de transacciones. */
  Connection connection;
  connection = ConnectionManager.getConnection(STATISTIC_DATA_BASE);
  Statement stmt = null;
  String query =
          "select * " +
          "from " + "dCellStatistic" + ".F_Transaction";

  /* Construimos las transacciones a partir de los registros. */
  ResultSet rs;
  try {
     stmt = connection.createStatement();
     rs = stmt.executeQuery(query);
     while (rs.next()) {
        transactionList.add(new Transaction(rs));
     }
  } catch (SQLException e ) {
     e.printStackTrace();
  } finally {
     if (stmt != null) {
        stmt.close();
     }
  }
  array = transactionList.toArray(new Transaction[transactionList.size()]);
}

java.sql.sqlRecoverableException：Closed语句：next

2 个答案: