我想用
编写一个MySQL Date列值jsonWriter.value((java.sql.Date) resultSet.getObject(column));
但似乎不可能那样。它表示long,Date,String都不适用于该类型。我怎样才能做到这一点?
完整代码:
private static void writeField(final ResultSet resultSet, final JsonWriter jsonWriter, final ResultSetMetaData metaData, final int column) throws SQLException, IOException {
final int columnType = metaData.getColumnType(column);
switch ( columnType ) {
case Types.BIT:
case Types.TINYINT:
case Types.SMALLINT:
throw new UnsupportedOperationException("TODO: " + JDBCType.valueOf(columnType));
case Types.INTEGER:
jsonWriter.value((Integer) resultSet.getObject(column));
break;
case Types.BIGINT:
case Types.FLOAT:
case Types.REAL:
case Types.DOUBLE:
case Types.NUMERIC:
case Types.DECIMAL:
case Types.CHAR:
throw new UnsupportedOperationException("TODO: " + JDBCType.valueOf(columnType));
case Types.VARCHAR:
jsonWriter.value((String) resultSet.getObject(column));
break;
case Types.LONGVARCHAR:
jsonWriter.value((String) resultSet.getObject(column));
break;
case Types.DATE:
// here's the problem. i dont know to what to case the column.
jsonWriter.value((java.sql.Date) resultSet.getObject(column));
break;
case Types.TIME:
case Types.TIMESTAMP:
jsonWriter.value((long) resultSet.getObject(column));
case Types.BINARY:
case Types.VARBINARY:
case Types.LONGVARBINARY:
case Types.NULL:
case Types.OTHER:
case Types.JAVA_OBJECT:
case Types.DISTINCT:
case Types.STRUCT:
case Types.ARRAY:
case Types.BLOB:
case Types.CLOB:
case Types.REF:
case Types.DATALINK:
case Types.BOOLEAN:
case Types.ROWID:
case Types.NCHAR:
case Types.NVARCHAR:
case Types.LONGNVARCHAR:
case Types.NCLOB:
case Types.SQLXML:
case Types.REF_CURSOR:
case Types.TIME_WITH_TIMEZONE:
case Types.TIMESTAMP_WITH_TIMEZONE:
throw new UnsupportedOperationException("TODO: " + JDBCType.valueOf(columnType));
default:
throw new UnsupportedOperationException("Unknown type: " + columnType);
}
}
我还需要稍后实现时间戳 - 以防它们相关。
非常感谢! :)
答案 0 :(得分:0)
好的,我终于找到了怎么做(我希望,不是100%肯定,因为我无法在客户端显示数据 - 但它编译并运行。这是代码:
FileLoadException: Could not load file or assembly 'System.Diagnostics.DiagnosticSource, Version=4.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)
System.Net.Http.WinHttpHandler.SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
AggregateException: Unhandled remote failure.
Microsoft.AspNetCore.Authentication.RemoteAuthenticationHandler+<HandleRemoteCallbackAsync>d__6.MoveNext()
我希望我没有以同样的方式将其格式化两次? :)
这里还有时间戳的代码:
case Types.DATE:
java.sql.Date sqlDate = (java.sql.Date) resultSet.getObject(column);
LocalDate localDate = sqlDate.toLocalDate();
DateTimeFormatter formatDt = DateTimeFormatter.ISO_LOCAL_DATE;
String formattedDate = localDate.format(formatDt);
jsonWriter.value((String) formattedDate);
break;