以下代码用于编写dom4j元素，
df1 <- structure(list(ID = c(1047699L, 858339L, 1002910L, 277135L, 753308L,
1018840L, 1510295L, 3133L, 1467858L, 865436L), date_f = structure(c(16132,
13573, 14600, 15023, 12486, 13935, 15268, 16128, 14666, 12727
), class = "Date")), row.names = c(NA, -10L), .internal.selfref = <pointer: 0x0000000002511ef0>, class = "data.frame")
它引发以下异常
df2 <- structure(list(ID = c(3133L, 3133L, 3133L, 3133L, 3133L, 3133L,
3133L, 753308L, 753308L, 753308L, 753308L, 753308L, 753308L,
753308L, 753308L, 753308L, 753308L, 753308L, 753308L, 753308L,
753308L, 753308L, 753308L, 753308L, 753308L, 753308L, 753308L,
1467858L, 1467858L, 1467858L, 1467858L, 1467858L, 1467858L, 1467858L,
1467858L, 1467858L, 1467858L, 1467858L, 1467858L, 1467858L, 1467858L,
1467858L, 1467858L, 1467858L, 1467858L, 1467858L, 1467858L, 277135L,
277135L, 277135L, 277135L, 277135L, 277135L, 277135L, 277135L,
277135L, 277135L, 277135L, 277135L, 277135L, 277135L, 277135L,
277135L, 277135L, 277135L, 277135L, 277135L, 1002910L, 1002910L,
1002910L, 1002910L, 1002910L, 1002910L, 1002910L, 1002910L, 1002910L,
1002910L, 1002910L, 1002910L, 1002910L, 1002910L, 1002910L, 1002910L,
1002910L, 1002910L, 1002910L, 1002910L, 858339L, 858339L, 858339L,
858339L, 858339L, 858339L, 858339L, 858339L, 858339L, 858339L,
858339L, 858339L, 858339L, 858339L, 858339L, 858339L, 858339L,
858339L, 858339L, 858339L, 865436L, 865436L, 865436L, 865436L,
865436L, 865436L, 865436L, 865436L, 865436L, 865436L, 865436L,
865436L, 865436L, 865436L, 865436L, 865436L, 865436L, 865436L,
1018840L, 1018840L, 1018840L, 1018840L, 1018840L, 1018840L, 1018840L,
1018840L, 1018840L, 1018840L, 1018840L, 1018840L, 1018840L, 1018840L,
1018840L, 1018840L, 1018840L, 1018840L, 1018840L, 1018840L, 1018840L,
1047699L, 1047699L, 1047699L, 1047699L, 1047699L, 1047699L, 1047699L,
1047699L, 1047699L, 1047699L, 1047699L, 1510295L, 1510295L, 1510295L,
1510295L, 1510295L, 1510295L, 1510295L, 1510295L, 1510295L, 1510295L
), date = structure(c(10956, 11322, 11687, 12052, 12417, 12783,
13148, 10956, 11322, 11687, 12052, 12417, 12783, 13148, 13513,
13878, 14244, 14609, 14974, 15339, 15705, 16070, 16435, 16800,
17166, 17531, 17896, 10956, 11322, 11687, 12052, 12417, 12783,
13148, 13513, 13878, 14244, 14609, 14974, 15339, 15705, 16070,
16435, 16800, 17166, 17531, 17896, 10956, 11322, 11687, 12052,
12417, 12783, 13148, 13513, 13878, 14244, 14609, 14974, 15339,
15705, 16070, 16435, 16800, 17166, 17531, 17896, 10956, 11322,
11687, 12052, 12417, 12783, 13148, 13513, 13878, 17166, 14244,
14609, 14974, 15339, 15705, 16070, 16435, 16800, 17531, 17896,
10956, 11322, 11687, 12052, 12417, 12783, 13148, 13513, 13878,
14244, 14609, 14974, 15339, 15705, 16070, 16435, 16800, 17166,
17531, 17896, 10864, 11230, 11595, 11960, 12325, 12691, 13056,
13421, 13786, 14152, 14517, 14882, 15247, 15613, 15978, 16343,
16708, 17074, 10622, 10987, 11353, 11718, 12083, 12448, 12814,
13179, 13544, 13909, 14275, 14640, 15005, 15370, 15736, 16101,
16466, 16831, 17197, 17562, 17927, 10956, 11322, 11687, 12052,
12417, 12783, 13148, 13513, 13878, 14244, 14609, 14609, 14974,
15339, 15705, 16070, 16435, 16800, 17166, 17531, 17896), class = "Date"),
year = c(1999L, 2000L, 2001L, 2002L, 2003L, 2004L, 2005L,
1999L, 2000L, 2001L, 2002L, 2003L, 2004L, 2005L, 2006L, 2007L,
2008L, 2009L, 2010L, 2011L, 2012L, 2013L, 2014L, 2015L, 2016L,
2017L, 2018L, 1999L, 2000L, 2001L, 2002L, 2003L, 2004L, 2005L,
2006L, 2007L, 2008L, 2009L, 2010L, 2011L, 2012L, 2013L, 2014L,
2015L, 2016L, 2017L, 2018L, 1999L, 2000L, 2001L, 2002L, 2003L,
2004L, 2005L, 2006L, 2007L, 2008L, 2009L, 2010L, 2011L, 2012L,
2013L, 2014L, 2015L, 2016L, 2017L, 2018L, 1999L, 2000L, 2001L,
2002L, 2003L, 2004L, 2005L, 2006L, 2007L, 2016L, 2008L, 2009L,
2010L, 2011L, 2012L, 2013L, 2014L, 2015L, 2017L, 2018L, 1999L,
2000L, 2001L, 2002L, 2003L, 2004L, 2005L, 2006L, 2007L, 2008L,
2009L, 2010L, 2011L, 2012L, 2013L, 2014L, 2015L, 2016L, 2017L,
2018L, 1999L, 2000L, 2001L, 2002L, 2003L, 2004L, 2005L, 2006L,
2007L, 2008L, 2009L, 2010L, 2011L, 2012L, 2013L, 2014L, 2015L,
2016L, 1998L, 1999L, 2000L, 2001L, 2002L, 2003L, 2004L, 2005L,
2006L, 2007L, 2008L, 2009L, 2010L, 2011L, 2012L, 2013L, 2014L,
2015L, 2016L, 2017L, 2018L, 1999L, 2000L, 2001L, 2002L, 2003L,
2004L, 2005L, 2006L, 2007L, 2008L, 2009L, 2009L, 2010L, 2011L,
2012L, 2013L, 2014L, 2015L, 2016L, 2017L, 2018L)), row.names = c(NA,
-167L), .internal.selfref = <pointer: 0x0000000002511ef0>, class = "data.frame")
是否无法使用jackson ObjectMapper编写dom4j元素？
我也尝试过XMLMapper（）。同样的问题。 看起来DocumentFactory和dom4j Element的QName具有双向关系。我无法设置注释，因为它位于依赖项之内。
有人遇到这个问题吗？有办法解决这个问题吗？