/**
*根据参数设置map的key大小写
**/
private RowMapper<Map<String,Object>> getColumnMapRowMapper() {
if(getKeyType().equalsIgnoreCase(LOWER_KEY)){
return new MiniColumnMapRowMapper();
}else if(getKeyType().equalsIgnoreCase(UPPER_KEY)){
return new ColumnMapRowMapper();
}else{
return new MiniColumnOriginalMapRowMapper();
}