Question

我有一个方法，使用preparedStatements将数据插入我的SQL数据库。目前，天气数据已插入mydb.weather_data。出于某种原因，我没有连接到我的数据库（没有任何连接错误），但实际上没有数据插入我的数据库。

我想知道问题是什么？下面的数字都是用于测试插入的虚拟数据。

我的五个列的type分别为varChar(10)和Int，其余为四个。

private static void batchInsertRecordsIntoTable() throws SQLException{
        Connection dbConnection = null;
        PreparedStatement preparedStatement = null;

        String insertTableSQL = "INSERT INTO `mydb`.`weather_data`" 
                + "(`dateTime`,`hourlyTemp`,`dewPoint`,`windSpeed`,`relHum`) VALUES" 
                + "(?,?,?,?,?)";
        try{
            dbConnection = getDBConnection();
            preparedStatement = dbConnection.prepareStatement(insertTableSQL);

            dbConnection.setAutoCommit(false);

            preparedStatement.setString(1, "1111111111"); // dateTime
            preparedStatement.setInt(2, 12); // hourlyTemp
            preparedStatement.setInt(3, 12); // dewPoint
            preparedStatement.setInt(4, 12); //windSpped
            preparedStatement.setInt(5, 12); //relHum
            preparedStatement.addBatch();

            preparedStatement.executeBatch();

            dbConnection.commit();

            System.out.println("Record was inserted into mydb weather_data");

        }catch(SQLException e){
            System.out.println(e.getMessage());
            dbConnection.rollback();
        }finally{
            if(preparedStatement!=null){
                preparedStatement.close();
            }
            if(dbConnection!=null){
                dbConnection.close();
            }
        }
    }

Answer 1

试试这个：

private static void batchInsertRecordsIntoTable() throws SQLException{
        Connection dbConnection = null;
        PreparedStatement preparedStatement = null;

        String insertTableSQL = "INSERT INTO mydb.weather_data" 
                + "(dateTime,hourlyTemp,dewPoint,windSpeed,relHum) VALUES" 
                + "(?,?,?,?,?)";
        try{
            dbConnection = getDBConnection();
            preparedStatement = dbConnection.prepareStatement(insertTableSQL);

            dbConnection.setAutoCommit(false);

            preparedStatement.setString(1, "1111111111"); // dateTime
            preparedStatement.setInt(2, 12); // hourlyTemp
            preparedStatement.setInt(3, 12); // dewPoint
            preparedStatement.setInt(4, 12); //windSpped
            preparedStatement.setInt(5, 12); //relHum

            preparedStatement.executeUpdate();

            dbConnection.commit();

            System.out.println("Record was inserted into mydb weather_data");

        }catch(SQLException e){
            System.out.println(e.getMessage());
            dbConnection.rollback();
        }finally{
            if(preparedStatement!=null){
                preparedStatement.close();
            }
            if(dbConnection!=null){
                dbConnection.close();
            }
        }
    }

使用PreparedStatement没有数据插入到我的数据库中

1 个答案: